Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
Probably won't be PDS (guessing probs like 50/30), but the Baltimore-Washington area is entering the picture.
MESOSCALE DISCUSSION 0455
NWS STORM PREDICTION CENTER NORMAN OK
1152 AM CDT SAT APR 16 2011
AREAS AFFECTED...DC...PORTIONS VA...MD...DE...ERN PANHANDLE OF WV.
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 161652Z - 161845Z
SVR THREAT....INCLUDING TORNADO/DAMAGING GUST RISK...IS FCST TO
INCREASE THROUGH LATE AFTERNOON OVER AREAS N OF WW 150. WHILE NOT
AS BUOYANT AS FARTHER S...AIR MASS IS FCST TO DESTABILIZE AT LEAST
MRGL LEVELS THROUGH 21Z. GIVEN ALREADY FAVORABLE DEEP-LAYER
KINEMATIC PROFILES THAT ARE FCST TO STRENGTHEN WITH TIME AS
MID-UPPER TROUGH APCHS...WW IS ANTICIPATED.
16Z SFC MESOANALYSIS DEPICTS COLD FRONT MOVING EWD ACROSS
CENTRAL/NRN WV AND WRN VA...JUST BEHIND INCREASING
COVERAGE/INTENSITY OF TSTMS WITHIN CONVECTIVE BAND NEAR MWK-ROA-EKN
LINE. WARM FRONT WAS REDEVELOPING NWD ACROSS NC TO NEAR VA BORDER
AND WILL MOVE NWD ACROSS SRN/CENTRAL VA AND SRN MD...PERHAPS AS FAR
N AS DC AREA PRIOR TO ARRIVAL OF MAIN TSTM BAND. CLOUD
BREAKS...EVIDENT IN 1615Z VIS IMAGE OVER CENTRAL NC...WERE SPREADING
NWD INTO S-CENTRAL VA. THIS WILL COMBINE WITH THETAE ADVECTION
ACCOMPANYING WARM FROPA TO RENDER SFC-BASED EFFECTIVE INFLOW
PARCELS...MINIMAL CINH AND AT LEAST WEAK MLCAPE OVER MUCH OF
CENTRAL/ERN VA...WHILE THERMODYNAMIC PROFILES OVER WRN/NRN VA WILL
REMAIN NEARLY NEUTRAL. BY 20Z...EXPECT 200-500 J/KG MLCAPE INTO
PORTIONS SWRN-CENTRAL VA AHEAD OF CONVECTIVE
BAND...SPREADING/EXPANDING NEWD TOWARD MD BY LATE AFTERNOON. AS
BUOYANT PROFILE DEVELOPS/DEEPENS...EFFECTIVE SHEAR 60-75 KT WILL
DEVELOP. MEANWHILE EFFECTIVE SRH NEAR 500 J/KG WILL OCCUR INVOF
WARM FRONT.
EXPECT MORE MERIDIONALLY ALIGNED MEAN WIND VECTORS WITH NWD
EXTENT...WHICH WILL BE LESS ORTHOGONAL TO CORRIDOR OF CONVECTIVE
FORCING. THIS WILL CONTRIBUTE TO MORE LINEAR MODAL TENDENCIES
ACROSS WRN/NWRN VA AND NWRN MD. HOWEVER...STG SFC ISALLOBARIC
FORCING WILL MAINTAIN RELATIVELY BACKED SFC WINDS AND ENLARGED
LOW-LEVEL HODOGRAPHS. THIS INDICATES POTENTIAL FOR EMBEDDED
BOW/LEWP FEATURES TO ENHANCE WIND DAMAGE THREAT LOCALLY...AS WELL AS
TORNADOES RELATED TO BOTH EMBEDDED MESOCIRCULATIONS AND LEADING-EDGE
QUASI-LINEAR CONVECTIVE FORCING.
..EDWARDS.. 04/16/2011
ATTN...WFO...PHI...AKQ...LWX...RNK...
LAT...LON 37487984 38707956 39597841 39677732 39317637 38817549
37957531 37827547 37157590 37327609 37697811 37547934
37487984
MESOSCALE DISCUSSION 0455
NWS STORM PREDICTION CENTER NORMAN OK
1152 AM CDT SAT APR 16 2011
AREAS AFFECTED...DC...PORTIONS VA...MD...DE...ERN PANHANDLE OF WV.
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 161652Z - 161845Z
SVR THREAT....INCLUDING TORNADO/DAMAGING GUST RISK...IS FCST TO
INCREASE THROUGH LATE AFTERNOON OVER AREAS N OF WW 150. WHILE NOT
AS BUOYANT AS FARTHER S...AIR MASS IS FCST TO DESTABILIZE AT LEAST
MRGL LEVELS THROUGH 21Z. GIVEN ALREADY FAVORABLE DEEP-LAYER
KINEMATIC PROFILES THAT ARE FCST TO STRENGTHEN WITH TIME AS
MID-UPPER TROUGH APCHS...WW IS ANTICIPATED.
16Z SFC MESOANALYSIS DEPICTS COLD FRONT MOVING EWD ACROSS
CENTRAL/NRN WV AND WRN VA...JUST BEHIND INCREASING
COVERAGE/INTENSITY OF TSTMS WITHIN CONVECTIVE BAND NEAR MWK-ROA-EKN
LINE. WARM FRONT WAS REDEVELOPING NWD ACROSS NC TO NEAR VA BORDER
AND WILL MOVE NWD ACROSS SRN/CENTRAL VA AND SRN MD...PERHAPS AS FAR
N AS DC AREA PRIOR TO ARRIVAL OF MAIN TSTM BAND. CLOUD
BREAKS...EVIDENT IN 1615Z VIS IMAGE OVER CENTRAL NC...WERE SPREADING
NWD INTO S-CENTRAL VA. THIS WILL COMBINE WITH THETAE ADVECTION
ACCOMPANYING WARM FROPA TO RENDER SFC-BASED EFFECTIVE INFLOW
PARCELS...MINIMAL CINH AND AT LEAST WEAK MLCAPE OVER MUCH OF
CENTRAL/ERN VA...WHILE THERMODYNAMIC PROFILES OVER WRN/NRN VA WILL
REMAIN NEARLY NEUTRAL. BY 20Z...EXPECT 200-500 J/KG MLCAPE INTO
PORTIONS SWRN-CENTRAL VA AHEAD OF CONVECTIVE
BAND...SPREADING/EXPANDING NEWD TOWARD MD BY LATE AFTERNOON. AS
BUOYANT PROFILE DEVELOPS/DEEPENS...EFFECTIVE SHEAR 60-75 KT WILL
DEVELOP. MEANWHILE EFFECTIVE SRH NEAR 500 J/KG WILL OCCUR INVOF
WARM FRONT.
EXPECT MORE MERIDIONALLY ALIGNED MEAN WIND VECTORS WITH NWD
EXTENT...WHICH WILL BE LESS ORTHOGONAL TO CORRIDOR OF CONVECTIVE
FORCING. THIS WILL CONTRIBUTE TO MORE LINEAR MODAL TENDENCIES
ACROSS WRN/NWRN VA AND NWRN MD. HOWEVER...STG SFC ISALLOBARIC
FORCING WILL MAINTAIN RELATIVELY BACKED SFC WINDS AND ENLARGED
LOW-LEVEL HODOGRAPHS. THIS INDICATES POTENTIAL FOR EMBEDDED
BOW/LEWP FEATURES TO ENHANCE WIND DAMAGE THREAT LOCALLY...AS WELL AS
TORNADOES RELATED TO BOTH EMBEDDED MESOCIRCULATIONS AND LEADING-EDGE
QUASI-LINEAR CONVECTIVE FORCING.
..EDWARDS.. 04/16/2011
ATTN...WFO...PHI...AKQ...LWX...RNK...
LAT...LON 37487984 38707956 39597841 39677732 39317637 38817549
37957531 37827547 37157590 37327609 37697811 37547934
37487984
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
WWUS52 KRAH 161700
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
100 PM EDT SAT APR 16 2011
NCC057-161730-
/O.CON.KRAH.TO.W.0005.000000T0000Z-110416T1730Z/
DAVIDSON NC-
100 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 130 PM EDT FOR DAVIDSON
COUNTY...
AT 1258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR LEXINGTON...MOVING
NORTHEAST AT 60 MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... ARCADIA...GORDONTOWN...
WELCOME...MIDWAY AND THOMASVILLE.
THIS IS AN EXTREMELY DANGEROUS STORM. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE LIE DOWN IN
A LOW LYING AREA. PROTECT YOURSELF FROM FLYING DEBRIS.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3585 8039 3589 8041 3590 8037 3597 8037
3599 8032 3599 8021 3601 8021 3602 8018
3601 8004 3571 8005 3566 8031 3571 8033
3571 8038 3574 8046 3577 8046 3583 8049
TIME...MOT...LOC 1700Z 235DEG 53KT 3581 8025
$$
VINCENT
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
100 PM EDT SAT APR 16 2011
NCC057-161730-
/O.CON.KRAH.TO.W.0005.000000T0000Z-110416T1730Z/
DAVIDSON NC-
100 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 130 PM EDT FOR DAVIDSON
COUNTY...
AT 1258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR LEXINGTON...MOVING
NORTHEAST AT 60 MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... ARCADIA...GORDONTOWN...
WELCOME...MIDWAY AND THOMASVILLE.
THIS IS AN EXTREMELY DANGEROUS STORM. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE LIE DOWN IN
A LOW LYING AREA. PROTECT YOURSELF FROM FLYING DEBRIS.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3585 8039 3589 8041 3590 8037 3597 8037
3599 8032 3599 8021 3601 8021 3602 8018
3601 8004 3571 8005 3566 8031 3571 8033
3571 8038 3574 8046 3577 8046 3583 8049
TIME...MOT...LOC 1700Z 235DEG 53KT 3581 8025
$$
VINCENT
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
Looks like the QLCS will drive right into a high significant tornado potential across both North & South Carolina driven by a good mid-level negative tilt.
This will be a very wide breakout.
This is the same setup like I saw last year at the Yazoo City, MS outbreak.


This will be a very wide breakout.
This is the same setup like I saw last year at the Yazoo City, MS outbreak.


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Same cell as my last image. Also a WFO border crosser. Raleigh was a bit quicker on the gun this time.
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN ANSON COUNTY IN CENTRAL NORTH CAROLINA
STANLY COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 130 PM EDT
* AT 1254 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO 12 MILES SOUTH OF STANFIELD...OR 7 MILES NORTHEAST OF
MONROE...MOVING NORTHEAST AT 60 MPH.
* LOCATIONS IMPACTED INCLUDE...
STANFIELD...OAKBORO...ALBEMARLE...NORWOOD...
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN ANSON COUNTY IN CENTRAL NORTH CAROLINA
STANLY COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 130 PM EDT
* AT 1254 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO 12 MILES SOUTH OF STANFIELD...OR 7 MILES NORTHEAST OF
MONROE...MOVING NORTHEAST AT 60 MPH.
* LOCATIONS IMPACTED INCLUDE...
STANFIELD...OAKBORO...ALBEMARLE...NORWOOD...
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 151
NWS STORM PREDICTION CENTER NORMAN OK
130 PM EDT SAT APR 16 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
MARYLAND
NORTHERN VIRGINIA
EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL
900 PM EDT.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF
MARTINSBURG WEST VIRGINIA TO 25 MILES WEST OF RICHMOND VIRGINIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 150...
DISCUSSION...A STRONGLY FORCED BAND OF TSTMS DEVELOPING ALONG
SYNOPTIC COLD FRONT IS EXPECTED TO PROGRESS EWD ACROSS THE WW AREA
THIS AFTERNOON INTO EVENING. INTENSE PRESSURE FALLS OVER THE MID
ATLANTIC STATES ARE RESULTING IN THE NWD FLUX OF AN INCREASINGLY
WARM AND MOIST BOUNDARY LAYER INTO THE AREA WHICH WILL ALLOW FOR
STORMS TO BECOME PROGRESSIVELY SURFACE-BASED. GIVEN THE VERY STRONG
WIND FIELD IN PLACE...THE POTENTIAL WILL EXIST FOR EMBEDDED BOWING
AND SUPERCELL STRUCTURES WITH A RISK FOR TORNADOES AND DAMAGING WIND
GUSTS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
350. MEAN STORM MOTION VECTOR 21050.
...MEAD
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 151
NWS STORM PREDICTION CENTER NORMAN OK
130 PM EDT SAT APR 16 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
MARYLAND
NORTHERN VIRGINIA
EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL
900 PM EDT.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF
MARTINSBURG WEST VIRGINIA TO 25 MILES WEST OF RICHMOND VIRGINIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 150...
DISCUSSION...A STRONGLY FORCED BAND OF TSTMS DEVELOPING ALONG
SYNOPTIC COLD FRONT IS EXPECTED TO PROGRESS EWD ACROSS THE WW AREA
THIS AFTERNOON INTO EVENING. INTENSE PRESSURE FALLS OVER THE MID
ATLANTIC STATES ARE RESULTING IN THE NWD FLUX OF AN INCREASINGLY
WARM AND MOIST BOUNDARY LAYER INTO THE AREA WHICH WILL ALLOW FOR
STORMS TO BECOME PROGRESSIVELY SURFACE-BASED. GIVEN THE VERY STRONG
WIND FIELD IN PLACE...THE POTENTIAL WILL EXIST FOR EMBEDDED BOWING
AND SUPERCELL STRUCTURES WITH A RISK FOR TORNADOES AND DAMAGING WIND
GUSTS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
350. MEAN STORM MOTION VECTOR 21050.
...MEAD
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
ZCZC SPCPWOSPC ALL
WOUS40 KWNS 161652
NCZ000-SCZ000-170200-
PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1152 AM CDT SAT APR 16 2011
...TORNADO OUTBREAK EXPECTED OVER PARTS OF CNTRL/ERN NC AND FAR ERN
SC THIS AFTERNOON INTO THIS EVENING...
THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF NUMEROUS SEVERE STORMS WITH SEVERAL STRONG TORNADOES
AND A POTENTIAL FOR LONG TRACK TORNADOES ACROSS PARTS OF ERN NC AND
FAR ERN SC THIS AFTERNOON INTO THE EVENING.
THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
CENTRAL AND EASTERN NORTH CAROLINA
FAR ERN SOUTH CAROLINA
ELSEWHERE...SURROUNDING THE AREA OF GREATEST RISK...NUMEROUS SEVERE
STORMS ARE LIKELY FROM ERN-SRN VA SWD ACROSS PARTS NC AND SC WITH A
SEVERE THREAT ALSO OVER THE MID-ATLANTIC AND ERN GA.
THE UPPER LEVEL STORM SYSTEM THAT WAS RESPONSIBLE FOR THE WIDESPREAD
SEVERE WEATHER OVER THE GULF STATES ON FRIDAY WILL MOVE TO THE EAST
INTO THE OHIO VALLEY AND CENTRAL APPALACHIANS TODAY AND TONIGHT.
AS THIS OCCURS...A BAND OF FAST JET STREAM FLOW WILL SWEEP
NORTHEASTWARD FROM ALABAMA AND TENNESSEE EARLY IN THE DAY TO THE MID
ATLANTIC COAST BY EVENING.
AT THE SAME TIME...A STREAM OF INCREASINGLY WARM AND HUMID AIR WILL
SPREAD NORTH ACROSS THE CAROLINAS AND SOUTHERN VIRGINA...AHEAD OF A
COLD FRONT ASSOCIATED WITH THE OHIO VALLEY STORM SYSTEM.
THE COMBINATION OF STRENGTHENING WINDS...DAYTIME HEATING AND
LOW-LEVEL MOISTURE RETURN AHEAD OF THE COLD FRONT WILL CREATE AN
ENVIRONMENT FAVORABLE FOR THE DEVELOPMENT OF LONG-LIVED SUPERCELL
THUNDERSTORMS AND TORNADOES. THESE STORMS WILL BE CAPABLE OF
PRODUCING STRONG TORNADOES WITH A POTENTIAL FOR LONG-TRACK
TORNADOES...IN ADDITION TO DAMAGING WINDS AND HAIL.
STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS POTENTIALLY
VERY DANGEROUS SITUATION. THOSE IN THE THREATENED AREA ARE URGED TO
REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO
RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE
WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
..BROYLES.. 04/16/2011
$
WOUS40 KWNS 161652
NCZ000-SCZ000-170200-
PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1152 AM CDT SAT APR 16 2011
...TORNADO OUTBREAK EXPECTED OVER PARTS OF CNTRL/ERN NC AND FAR ERN
SC THIS AFTERNOON INTO THIS EVENING...
THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF NUMEROUS SEVERE STORMS WITH SEVERAL STRONG TORNADOES
AND A POTENTIAL FOR LONG TRACK TORNADOES ACROSS PARTS OF ERN NC AND
FAR ERN SC THIS AFTERNOON INTO THE EVENING.
THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
CENTRAL AND EASTERN NORTH CAROLINA
FAR ERN SOUTH CAROLINA
ELSEWHERE...SURROUNDING THE AREA OF GREATEST RISK...NUMEROUS SEVERE
STORMS ARE LIKELY FROM ERN-SRN VA SWD ACROSS PARTS NC AND SC WITH A
SEVERE THREAT ALSO OVER THE MID-ATLANTIC AND ERN GA.
THE UPPER LEVEL STORM SYSTEM THAT WAS RESPONSIBLE FOR THE WIDESPREAD
SEVERE WEATHER OVER THE GULF STATES ON FRIDAY WILL MOVE TO THE EAST
INTO THE OHIO VALLEY AND CENTRAL APPALACHIANS TODAY AND TONIGHT.
AS THIS OCCURS...A BAND OF FAST JET STREAM FLOW WILL SWEEP
NORTHEASTWARD FROM ALABAMA AND TENNESSEE EARLY IN THE DAY TO THE MID
ATLANTIC COAST BY EVENING.
AT THE SAME TIME...A STREAM OF INCREASINGLY WARM AND HUMID AIR WILL
SPREAD NORTH ACROSS THE CAROLINAS AND SOUTHERN VIRGINA...AHEAD OF A
COLD FRONT ASSOCIATED WITH THE OHIO VALLEY STORM SYSTEM.
THE COMBINATION OF STRENGTHENING WINDS...DAYTIME HEATING AND
LOW-LEVEL MOISTURE RETURN AHEAD OF THE COLD FRONT WILL CREATE AN
ENVIRONMENT FAVORABLE FOR THE DEVELOPMENT OF LONG-LIVED SUPERCELL
THUNDERSTORMS AND TORNADOES. THESE STORMS WILL BE CAPABLE OF
PRODUCING STRONG TORNADOES WITH A POTENTIAL FOR LONG-TRACK
TORNADOES...IN ADDITION TO DAMAGING WINDS AND HAIL.
STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS POTENTIALLY
VERY DANGEROUS SITUATION. THOSE IN THE THREATENED AREA ARE URGED TO
REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO
RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE
WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
..BROYLES.. 04/16/2011
$
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MESOSCALE DISCUSSION 0456
NWS STORM PREDICTION CENTER NORMAN OK
1234 PM CDT SAT APR 16 2011
AREAS AFFECTED...PORTIONS ERN OH...WRN PA...LE...SMALL PART OF NWRN
WV AND NRN PANHANDLE OF WV.
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 161734Z - 161930Z
NARROW BAND OF CONVECTION MAY PRODUCE ISOLATED DAMAGING GUSTS NEAR
SVR LIMITS THROUGH 21Z.
SFC ANALYSIS SHOWS OCCLUDED FRONT CORRESPONDING WITH STRENGTHENING
BAND OF TSTMS AND RELATED NARROW BAND OF FORCED ASCENT...EXTENDING
FROM SWRN LE SEWD ACROSS WRN FRINGES CLE AREA TO JUST E ZZV AS OF
1715Z. THIS ACTIVITY IS FCST TO MOVE NEWD INTO NARROW...EWD-MOVING
CORRIDOR OF ENHANCED BOUNDARY-LAYER THETAE AND SFC HEATING...PER
CLEAR SLOT ON VIS IMAGERY. CORRESPONDINGLY MODIFIED MODEL SOUNDINGS
DEPICT NEUTRAL TO SLIGHTLY BUOYANT LOW-MIDLEVEL THERMODYNAMIC
PROFILES...WITH ESSENTIALLY MOIST-ADIABATIC LAPSE RATES EXCEPT IN
NEAR-SFC LAYER. POCKETS OF MLCAPE 100-250 J/KG MAY DEVELOP ABOVE
SFC THETAE AXIS...WHILE STG DEEP-LAYER SHEAR AND FLOW SUPPORT
POTENTIAL FOR DOWNWARD MOMENTUM TRANSFER IN MOST INTENSE DOWNDRAFTS.
..EDWARDS.. 04/16/2011
ATTN...WFO...PBZ...RLX...CLE...
LAT...LON 39308159 40778191 41448215 41748225 42218122 42388016
41398006 40408003 39638035 39308159
NWS STORM PREDICTION CENTER NORMAN OK
1234 PM CDT SAT APR 16 2011
AREAS AFFECTED...PORTIONS ERN OH...WRN PA...LE...SMALL PART OF NWRN
WV AND NRN PANHANDLE OF WV.
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 161734Z - 161930Z
NARROW BAND OF CONVECTION MAY PRODUCE ISOLATED DAMAGING GUSTS NEAR
SVR LIMITS THROUGH 21Z.
SFC ANALYSIS SHOWS OCCLUDED FRONT CORRESPONDING WITH STRENGTHENING
BAND OF TSTMS AND RELATED NARROW BAND OF FORCED ASCENT...EXTENDING
FROM SWRN LE SEWD ACROSS WRN FRINGES CLE AREA TO JUST E ZZV AS OF
1715Z. THIS ACTIVITY IS FCST TO MOVE NEWD INTO NARROW...EWD-MOVING
CORRIDOR OF ENHANCED BOUNDARY-LAYER THETAE AND SFC HEATING...PER
CLEAR SLOT ON VIS IMAGERY. CORRESPONDINGLY MODIFIED MODEL SOUNDINGS
DEPICT NEUTRAL TO SLIGHTLY BUOYANT LOW-MIDLEVEL THERMODYNAMIC
PROFILES...WITH ESSENTIALLY MOIST-ADIABATIC LAPSE RATES EXCEPT IN
NEAR-SFC LAYER. POCKETS OF MLCAPE 100-250 J/KG MAY DEVELOP ABOVE
SFC THETAE AXIS...WHILE STG DEEP-LAYER SHEAR AND FLOW SUPPORT
POTENTIAL FOR DOWNWARD MOMENTUM TRANSFER IN MOST INTENSE DOWNDRAFTS.
..EDWARDS.. 04/16/2011
ATTN...WFO...PBZ...RLX...CLE...
LAT...LON 39308159 40778191 41448215 41748225 42218122 42388016
41398006 40408003 39638035 39308159
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- Professional-Met
- Posts: 34001
- Joined: Tue Mar 07, 2006 11:57 pm
- Location: Deep South, for the first time!
Threat inching northward.
MESOSCALE DISCUSSION 0457
NWS STORM PREDICTION CENTER NORMAN OK
0105 PM CDT SAT APR 16 2011
AREAS AFFECTED...S-CNTRL PA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 161805Z - 161900Z
SEVERE THREAT MAY INCREASE IN THE NEXT FEW HOURS ACROSS S-CNTRL
PA--CONDITIONAL UPON AIRMASS DESTABILIZATION. A WW IS POSSIBLE.
LATEST SURFACE ANALYSIS PLACES A WARM FRONT DRAPED NW TO SE ACROSS
PORTIONS OF CNTRL VA. THE AIRMASS IS RAPIDLY RECOVERING ACROSS NRN
VA AHEAD OF ADVANCING BROKEN LINE OF SUPERCELLS--EVIDENT BY
TEMPERATURES AND DEWPOINTS RISING INTO THE 60S AND UPPER 50S
RESPECTIVELY. STRONG ISALLOBARIC FORCING IMPLIED BY STRONG PRESSURE
FALLS /2-3 MB PER HR/ ACROSS S-CNTRL PA AND ADJACENT PARTS OF NRN
VA/WRN MD WILL AID IN MAINTAINING A VERY STRONG LOW LEVEL WIND
PROFILE. NEUTRAL OR WEAK THERMAL BUOYANCY MAY BECOME SUFFICIENT
ENOUGH FOR CONVECTIVE UPDRAFTS TO FORM AS FAR N AS THE DISCUSSION
AREA...THEREBY POTENTIALLY INCREASING SEVERE STORM RISK. MORNING
MODEL GUIDANCE MAINTAINS RATHER COOL/STABLE LOW LEVEL PROFILES
THROUGH THE MID-LATE AFTERNOON HOURS. IN CONTRAST...MODIFYING THE
MODEL SOUNDING PROFILES FOR FORECAST TEMP/DEWPOINTS RISING INTO THE
UPPER 50S/MID 50S RESPECTIVELY YIELDS 100-300 J/KG MUCAPE. WILL
MONITOR AIRMASS DESTABILIZATION AND RADAR TRENDS IN THE SHORT TERM
/1-2 HRS/ TO DETERMINE WHETHER A WATCH MAY BE NEEDED FOR THIS AREA.
..SMITH.. 04/16/2011
ATTN...WFO...PHI...CTP...
LAT...LON 39777862 40287851 40677737 40547631 40197586 39777606
39777862
MESOSCALE DISCUSSION 0457
NWS STORM PREDICTION CENTER NORMAN OK
0105 PM CDT SAT APR 16 2011
AREAS AFFECTED...S-CNTRL PA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 161805Z - 161900Z
SEVERE THREAT MAY INCREASE IN THE NEXT FEW HOURS ACROSS S-CNTRL
PA--CONDITIONAL UPON AIRMASS DESTABILIZATION. A WW IS POSSIBLE.
LATEST SURFACE ANALYSIS PLACES A WARM FRONT DRAPED NW TO SE ACROSS
PORTIONS OF CNTRL VA. THE AIRMASS IS RAPIDLY RECOVERING ACROSS NRN
VA AHEAD OF ADVANCING BROKEN LINE OF SUPERCELLS--EVIDENT BY
TEMPERATURES AND DEWPOINTS RISING INTO THE 60S AND UPPER 50S
RESPECTIVELY. STRONG ISALLOBARIC FORCING IMPLIED BY STRONG PRESSURE
FALLS /2-3 MB PER HR/ ACROSS S-CNTRL PA AND ADJACENT PARTS OF NRN
VA/WRN MD WILL AID IN MAINTAINING A VERY STRONG LOW LEVEL WIND
PROFILE. NEUTRAL OR WEAK THERMAL BUOYANCY MAY BECOME SUFFICIENT
ENOUGH FOR CONVECTIVE UPDRAFTS TO FORM AS FAR N AS THE DISCUSSION
AREA...THEREBY POTENTIALLY INCREASING SEVERE STORM RISK. MORNING
MODEL GUIDANCE MAINTAINS RATHER COOL/STABLE LOW LEVEL PROFILES
THROUGH THE MID-LATE AFTERNOON HOURS. IN CONTRAST...MODIFYING THE
MODEL SOUNDING PROFILES FOR FORECAST TEMP/DEWPOINTS RISING INTO THE
UPPER 50S/MID 50S RESPECTIVELY YIELDS 100-300 J/KG MUCAPE. WILL
MONITOR AIRMASS DESTABILIZATION AND RADAR TRENDS IN THE SHORT TERM
/1-2 HRS/ TO DETERMINE WHETHER A WATCH MAY BE NEEDED FOR THIS AREA.
..SMITH.. 04/16/2011
ATTN...WFO...PHI...CTP...
LAT...LON 39777862 40287851 40677737 40547631 40197586 39777606
39777862
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- Professional-Met
- Posts: 34001
- Joined: Tue Mar 07, 2006 11:57 pm
- Location: Deep South, for the first time!
Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
WWUS52 KRAH 161807
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
207 PM EDT SAT APR 16 2011
NCC001-161830-
/O.CON.KRAH.TO.W.0009.000000T0000Z-110416T1830Z/
ALAMANCE NC-
207 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR NORTHERN
ALAMANCE COUNTY...
AT 204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
STRONGLY INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR
ALTAMAHAW...OR 6 MILES NORTH OF BURLINGTON...MOVING NORTHEAST AT 50
MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
OTHER DAMAGING WINDS IN EXCESS OF 60 MPH.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... UNION RIDGE AND
PLEASANT GROVE.
THIS IS AN EXTREMELY DANGEROUS STORM! HEAVY RAINFALL MAY HIDE THIS
TORNADO MAKING IT DIFFICULT TO SEE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3624 7926 3618 7926 3609 7953 3624 7953
TIME...MOT...LOC 1807Z 233DEG 43KT 3619 7944
$$
VINCENT
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
207 PM EDT SAT APR 16 2011
NCC001-161830-
/O.CON.KRAH.TO.W.0009.000000T0000Z-110416T1830Z/
ALAMANCE NC-
207 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR NORTHERN
ALAMANCE COUNTY...
AT 204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
STRONGLY INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR
ALTAMAHAW...OR 6 MILES NORTH OF BURLINGTON...MOVING NORTHEAST AT 50
MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
OTHER DAMAGING WINDS IN EXCESS OF 60 MPH.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... UNION RIDGE AND
PLEASANT GROVE.
THIS IS AN EXTREMELY DANGEROUS STORM! HEAVY RAINFALL MAY HIDE THIS
TORNADO MAKING IT DIFFICULT TO SEE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3624 7926 3618 7926 3609 7953 3624 7953
TIME...MOT...LOC 1807Z 233DEG 43KT 3619 7944
$$
VINCENT
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- Professional-Met
- Posts: 34001
- Joined: Tue Mar 07, 2006 11:57 pm
- Location: Deep South, for the first time!
Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
WWUS52 KRAH 161812
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
212 PM EDT SAT APR 16 2011
NCC001-161830-
/O.CON.KRAH.TO.W.0009.000000T0000Z-110416T1830Z/
ALAMANCE NC-
212 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR NORTHERN
ALAMANCE COUNTY...
AT 208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR UNION RIDGE...OR 7
MILES SOUTHWEST OF JERICHO...MOVING NORTHEAST AT 50 MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
OTHER DAMAGING WINDS IN EXCESS OF 60 MPH.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... PLEASANT GROVE.
THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. DOPPLER RADAR IS STRONGLY INDICATING A TORNADO. TAKE
COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS
AVAILABLE LIE DOWN IN A LOW LYING AREA. PROTECT YOURSELF FROM FLYING
DEBRIS.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3624 7926 3618 7926 3617 7928 3613 7953
3617 7953 3624 7953
TIME...MOT...LOC 1812Z 233DEG 43KT 3622 7938
$$
VINCENT
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
212 PM EDT SAT APR 16 2011
NCC001-161830-
/O.CON.KRAH.TO.W.0009.000000T0000Z-110416T1830Z/
ALAMANCE NC-
212 PM EDT SAT APR 16 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR NORTHERN
ALAMANCE COUNTY...
AT 208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR UNION RIDGE...OR 7
MILES SOUTHWEST OF JERICHO...MOVING NORTHEAST AT 50 MPH.
HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
OTHER DAMAGING WINDS IN EXCESS OF 60 MPH.
LOCATIONS IN THE PATH OF THE STORM INCLUDE... PLEASANT GROVE.
THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. DOPPLER RADAR IS STRONGLY INDICATING A TORNADO. TAKE
COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS
AVAILABLE LIE DOWN IN A LOW LYING AREA. PROTECT YOURSELF FROM FLYING
DEBRIS.
WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3624 7926 3618 7926 3617 7928 3613 7953
3617 7953 3624 7953
TIME...MOT...LOC 1812Z 233DEG 43KT 3622 7938
$$
VINCENT
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Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
Area around Lumberton to Whiteville, NC looks to be in a very rough ride in the next hour or so.




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- Professional-Met
- Posts: 34001
- Joined: Tue Mar 07, 2006 11:57 pm
- Location: Deep South, for the first time!
Re: Severe Storms OK & KS 4/14/11. South 4/15/11. EC 4/16/2011
MESOSCALE DISCUSSION 0458
NWS STORM PREDICTION CENTER NORMAN OK
0128 PM CDT SAT APR 16 2011
AREAS AFFECTED...PORTIONS S-CENTRAL/SERN VA...CENTRAL/ERN NC...ERN
SC.
CONCERNING...TORNADO WATCH 150...
VALID 161828Z - 162000Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 150 CONTINUES.
THREAT FOR SUPERCELLS AND TORNADOES...SOME WITH POTENTIAL FOR
SIGNIFICANT DAMAGE...CONTINUES OVER WW.
LATEST/18Z SFC MESOANALYSIS SHOWS RAPIDLY DEVELOPING MESOLOW NEAR
ALAMANCE COUNTY ALONG PRIMARY CONVECTIVE BAND...PRECEDED BY SMALL
BUT PRONOUNCED AREA OF BACKED FLOW AND PRESSURE FALLS AT RATE OF 5-8
MB PER 2 HOURS. RELATED ISALLOBARIC FORCING SHOULD HELP TO
MAINTAIN...AND PERHAPS LOCALLY INCREASE...ALREADY EXPANSIVE
HODOGRAPH SIZE FROM RDU AREA ENEWD AND NEWD ACROSS N-CENTRAL NC INTO
S-CENTRAL VA. RDU VWP SHOWS 500 J/KG OF 0-1 KM AGL SRH...AND 900
J/KG IN 0-3 KM LAYER...WHICH ALREADY IS EXTREME AND LIKELY
UNDER-REPRESENTS VALUES NEARER TO THE MESOLOW. 0-1 KM SRH NEAR 300
J/KG IS EVIDENT AS FAR S AS ERN SC. CONTINUED
HEATING/DESTABILIZATION OF AIR MASS OVER THIS REGION...COMBINED WITH
BOUNDARY-LAYER THETAE ADVECTION...WILL JUXTAPOSE CORRIDOR OF
500-1500 J/KG MLCAPE OVER THESE FAVORABLE KINEMATIC PROFILES IN
PRE-STORM SECTOR.
..EDWARDS.. 04/16/2011
ATTN...WFO...AKQ...MHX...LWX...RAH...ILM...RNK...CHS...CAE...
LAT...LON 33428097 35057987 37007935 37997786 37987648 37487610
36967597 36307580 35717547 35357549 35157553 35207567
35017608 34657650 34507650 34627661 34627709 34237775
33677800 33897806 33727884 33177922 32807982 32438044
32148100 32608114 33428097
NWS STORM PREDICTION CENTER NORMAN OK
0128 PM CDT SAT APR 16 2011
AREAS AFFECTED...PORTIONS S-CENTRAL/SERN VA...CENTRAL/ERN NC...ERN
SC.
CONCERNING...TORNADO WATCH 150...
VALID 161828Z - 162000Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 150 CONTINUES.
THREAT FOR SUPERCELLS AND TORNADOES...SOME WITH POTENTIAL FOR
SIGNIFICANT DAMAGE...CONTINUES OVER WW.
LATEST/18Z SFC MESOANALYSIS SHOWS RAPIDLY DEVELOPING MESOLOW NEAR
ALAMANCE COUNTY ALONG PRIMARY CONVECTIVE BAND...PRECEDED BY SMALL
BUT PRONOUNCED AREA OF BACKED FLOW AND PRESSURE FALLS AT RATE OF 5-8
MB PER 2 HOURS. RELATED ISALLOBARIC FORCING SHOULD HELP TO
MAINTAIN...AND PERHAPS LOCALLY INCREASE...ALREADY EXPANSIVE
HODOGRAPH SIZE FROM RDU AREA ENEWD AND NEWD ACROSS N-CENTRAL NC INTO
S-CENTRAL VA. RDU VWP SHOWS 500 J/KG OF 0-1 KM AGL SRH...AND 900
J/KG IN 0-3 KM LAYER...WHICH ALREADY IS EXTREME AND LIKELY
UNDER-REPRESENTS VALUES NEARER TO THE MESOLOW. 0-1 KM SRH NEAR 300
J/KG IS EVIDENT AS FAR S AS ERN SC. CONTINUED
HEATING/DESTABILIZATION OF AIR MASS OVER THIS REGION...COMBINED WITH
BOUNDARY-LAYER THETAE ADVECTION...WILL JUXTAPOSE CORRIDOR OF
500-1500 J/KG MLCAPE OVER THESE FAVORABLE KINEMATIC PROFILES IN
PRE-STORM SECTOR.
..EDWARDS.. 04/16/2011
ATTN...WFO...AKQ...MHX...LWX...RAH...ILM...RNK...CHS...CAE...
LAT...LON 33428097 35057987 37007935 37997786 37987648 37487610
36967597 36307580 35717547 35357549 35157553 35207567
35017608 34657650 34507650 34627661 34627709 34237775
33677800 33897806 33727884 33177922 32807982 32438044
32148100 32608114 33428097
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- S2K Supporter
- Posts: 186
- Age: 48
- Joined: Mon Aug 30, 2004 6:50 pm
- Location: New Bern NC
- Contact:
Hi from New Bern in eastern NC (2 hours east of Raleigh)! It's really windy here, but no rain or anything like that to speak of yet. For those of you who can follow and understand all the info coming out better than I can, what timeframe do you think we're looking at getting some of the rougher weather around here?
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- srainhoutx
- S2K Supporter
- Posts: 6919
- Age: 67
- Joined: Sun Jan 14, 2007 11:34 am
- Location: Haywood County, NC
- Contact:
Re:
wsquared77 wrote:Hi from New Bern in eastern NC (2 hours east of Raleigh)! It's really windy here, but no rain or anything like that to speak of yet. For those of you who can follow and understand all the info coming out better than I can, what timeframe do you think we're looking at getting some of the rougher weather around here?
The line is progressing E. Later in the afternoon/early evening would be my guess, wsquared77.
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Carla/Alicia/Jerry(In The Eye)/Michelle/Charley/Ivan/Dennis/Katrina/Rita/Wilma/Ike/Harvey
Member: National Weather Association
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Member: National Weather Association
Wx Infinity Forums
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Twitter @WeatherInfinity