Severe Weather Event Thanksgiving Week.

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#21 Postby Dave » Mon Nov 22, 2010 4:24 pm

OV 22 160000 EST
TORNAOD
4 MI E LOVES PARK
BOONE COUNTY IL
BROADCAST MEDIA
ESTIMATED 1/2 MILE WIDE TORNADO SPOTTED ON GROUND AT THE
INTERSECTION OF ARGOYLE AND HARLEM RD EAST OF ROCK CUT
STATE PARK NEAR CALEDONIA. POWER LINE AND DEPRIS IN ROAD.
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#22 Postby Dave » Mon Nov 22, 2010 4:25 pm

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
323 PM CST MON NOV 22 2010

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHERN DEKALB COUNTY...
KANE COUNTY...

* UNTIL 345 PM CST

* AT 318 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED ALONG U.S. ROUTE 30 BETWEEN SHABBONA...AND
WATERMAN. THIS STORM IS MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
HINCKLEY...MAPLE PARK AND ELBURN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4185 8830 4168 8880 4178 8888 4205 8843
TIME...MOT...LOC 2122Z 237DEG 39KT 4179 8874
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#23 Postby Dave » Mon Nov 22, 2010 4:27 pm

Also have multiple areas of high MSI's near Ottawa IL at 5700 to 6200 MSI on radar and second area of 4700 to 5200 MSI near KLOT NWS Chicago. I have to take off, will be back on later tonight but for now anyone in the N IL/S WI/N IN areas stay tuend to your local media.
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#24 Postby Dave » Mon Nov 22, 2010 4:32 pm

Another tornado warning;

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
323 PM CST MON NOV 22 2010

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHERN DEKALB COUNTY...
KANE COUNTY...

* UNTIL 345 PM CST

* AT 318 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED ALONG U.S. ROUTE 30 BETWEEN SHABBONA...AND
WATERMAN. THIS STORM IS MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
HINCKLEY...MAPLE PARK AND ELBURN.
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#25 Postby Dave » Mon Nov 22, 2010 8:34 pm

MESOSCALE DISCUSSION 2066
NWS STORM PREDICTION CENTER NORMAN OK
0709 PM CST MON NOV 22 2010

AREAS AFFECTED...PORTIONS OF NRN AND CNTRL AR

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 230109Z - 230215Z

THE THREAT FOR A SEVERE STORMS CAPABLE OF HAIL...LOCALLY DAMAGING
WINDS AND PERHAPS A COUPLE OF TORNADOES APPEARS TO BE INCREASING
ACROSS THE DISCUSSION AREA AND CONVECTIVE TRENDS ARE BEING MONITORED
FOR A POSSIBLE WW.

RECENT TRENDS IN REGIONAL RADAR IMAGERY INDICATE DEEPENING
CONVECTION WITHIN PRE-FRONTAL WARM SECTOR FROM N OF HOT TO BVX. 00Z
LIT SOUNDING INDICATED THE PRESENCE OF A CAPPING INVERSION AT AROUND
720 MB. HOWEVER...SUSTAINED LOW-LEVEL CONFLUENCE AND MOISTENING
ALONG SRN EXTENSION OF SWLY 40-50 KT LLJ MAY SUPPORT EVENTUAL STORM
DEVELOPMENT WITHIN THE SW-NE ORIENTED BAND OF DEEPENING CONVECTIVE
DEVELOPMENT. THIS SCENARIO IS SUPPORTED BY LATEST MESOSCALE AND
CONVECTION-RESOLVING MODEL GUIDANCE AND GIVEN THE STRONGLY SHEARED
ENVIRONMENT /REF. 00Z LIT SOUNDING AND CURRENT VWP DATA/...THE
POTENTIAL WILL EXIST FOR SUPERCELLS CAPABLE OF A COUPLE OF TORNADOES
IN ADDITION TO DAMAGING WINDS AND HAIL.

ELSEWHERE...TSTMS DEVELOPING NEAR COLD FRONT-DRYLINE TRIPLE POINT E
OF MKO MAY CONTINUE TO INTENSIFY WHILE MOVING EWD INTO NWRN AR WHERE
ENVIRONMENT BECOMES PROGRESSIVELY MORE MOIST AND STRONGLY SHEARED IN
THE LOW-LEVELS.

..MEAD.. 11/23/2010


ATTN...WFO...MEG...LZK...TSA...
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#26 Postby Dave » Mon Nov 22, 2010 8:35 pm

Tornado Watch Box...

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 747
NWS STORM PREDICTION CENTER NORMAN OK
615 PM EST MON NOV 22 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHEAST ILLINOIS
NORTHERN AND WESTERN INDIANA
WESTERN AND SOUTHERN LOWER MICHIGAN
LAKE MICHIGAN

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 615 PM UNTIL
200 AM EST.

TORNADOES...HAIL TO 1 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES EAST OF BLOOMINGTON
ILLINOIS TO 40 MILES NORTHEAST OF ROBEN HOOD MICHIGAN. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

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 744...WW 745...WW 746...

DISCUSSION...COLD FRONTAL AND PRE-FRONTAL STORMS NOW OVER LK MI AND
CNTRL/NRN IL EXPECTED TO CONTINUE MOVING/DEVELOPING ENEWD AS FRONT
STRENGTHENS WITH THE APPROACH OF UPSTREAM SHORTWAVE IMPULSE. WHILE
LOW LVL BUOYANCY WILL DIMINISH WITH NIGHTFALL...STRENGTH OF BOTH
LOW-LVL AND DEEP SHEAR SUGGESTS POSSIBILITY FOR SUPERCELLS AND EVEN
A COUPLE TORNADOES AS THE STORMS EVOLVE INTO BROKEN LINE
SEGMENTS/LEWPS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 24055.


...CORFIDI
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#27 Postby Dave » Mon Nov 22, 2010 8:36 pm

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 746
NWS STORM PREDICTION CENTER NORMAN OK
450 PM CST MON NOV 22 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL ILLINOIS
SOUTHERN THROUGH EAST CENTRAL MISSOURI

EFFECTIVE THIS MONDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF CHAMPAIGN
ILLINOIS TO 50 MILES SOUTH SOUTHEAST OF SPRINGFIELD MISSOURI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 744...WW 745...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND POSSIBLY
STRENGTH ALONG AND JUST AHEAD OF INTENSIFYING COLD FRONT MOVING ESE
FROM CNTRL/SW MO. FRONTAL UPLIFT AND LARGER SCALE UVV MAY BE
ENHANCED WITH TIME AS SECOND IMPULSE ASSOCIATED WITH BROADER
SHORTWAVE TROUGH CROSSING THE CNTRL PLNS CONTINUES EWD AND GLANCES
FRONTAL ZONE. VERY STRONG DEEP WIND FIELD...SEASONABLY MOIST
BOUNDARY LAYER INFLOW...AND RELATIVELY STEEP LOW LVL LAPSE RATES
SUGGEST POTENTIAL FOR A FEW SEMI-DISCRETE SUPERCELLS POSING A THREAT
FOR TORNADOES...IN ADDITION TO SVR HAIL/WIND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 25050.


...CORFIDI
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#28 Postby Dave » Mon Nov 22, 2010 8:37 pm

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0658 PM CST MON NOV 22 2010

VALID 230100Z - 231200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM SRN LOWER MI SWWD INTO ERN
OK/AR...

...SRN UPPER GREAT LAKES ACROSS THE LOWER OH/MID MS VALLEYS...
STORMS -- AND ASSOCIATED SEVERE THREAT -- SHOULD CONTINUE TO SLOWLY
DECREASE WITH TIME FROM NRN INDIANA NWD THIS EVENING...AS
DIMINISHING INSTABILITY IS INDICATED AHEAD OF THE ONGOING
PRECIPITATION.

HOWEVER...A BROKEN/COMPLEX LINE OF STORMS -- NOW EXTENDING FROM
ROUGHLY W CENTRAL INDIANA SWWD INTO ERN OK -- CONTINUES SHIFTING EWD
IN CONJUNCTION WITH THE ADVANCING COLD FRONT. RELATIVELY STRONG SLY
BOUNDARY-LAYER FLOW AHEAD OF THE FRONT WILL HELP MAINTAIN A
MILD/MOIST PRE-FRONTAL AIRMASS...AND ASSOCIATED MARGINAL INSTABILITY
THROUGH THIS EVENING AND INTO THE OVERNIGHT HOURS. WITH VERY STRONG
FLOW IN THE LOWER AND MIDDLE TROPOSPHERE PROVIDING SHEAR SUPPORTIVE
OF WELL-ORGANIZED/ROTATING STORMS...THREAT FOR DAMAGING WINDS AND A
TORNADO OR TWO WILL LIKELY PERSIST ACROSS THE MID MS/LOWER OH VALLEY
REGION INTO AR AS THE COMPLEX CONVECTIVE LINE SHIFTS ACROSS THIS
REGION. THEREFORE...WILL MAINTAIN SLIGHT RISK FORECAST...AND WILL
EXPAND THE RISK AREA SWD INTO AR THIS FORECAST AS CONVECTION
CONTINUES TO DEVELOP SWWD ALONG THE ADVANCING FRONT.

..GOSS.. 11/23/2010
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#29 Postby Dave » Mon Nov 22, 2010 8:38 pm

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#30 Postby Dave » Mon Nov 22, 2010 8:39 pm

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#31 Postby Dave » Mon Nov 22, 2010 8:41 pm

Image

Refresh page for current radar loop
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#32 Postby Dave » Mon Nov 22, 2010 8:43 pm

MESOSCALE DISCUSSION 2067
NWS STORM PREDICTION CENTER NORMAN OK
0731 PM CST MON NOV 22 2010

AREAS AFFECTED...CNTRL IL SWWD INTO S-CNTRL MO

CONCERNING...TORNADO WATCH 746...

VALID 230131Z - 230300Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 746 CONTINUES.

THE THREAT FOR DAMAGING WINDS...HAIL AND ISOLATED TORNADOES
CONTINUES ACROSS WW AREA.

A NEARLY CONTINUOUS BAND OF TSTMS /SOME SEVERE/ HAS DEVELOPED ALONG
INTENSIFYING COLD FRONT FROM NEAR/NE OF CMI SWWD THROUGH THE STL
METROPOLITAN AREA TO N OF FYV AS OF 0120Z. 00Z REGIONAL SOUNDINGS
INDICATE THAT CONVECTIVE INSTABILITY REMAINS LIMITED WITH MLCAPE
GENERALLY LESS THAN 500 J/KG. HOWEVER...THE STRENGTHENING/
DEEPENING MESOSCALE CIRCULATION ASSOCIATED WITH THE FRONTOGENETIC
BAROCLINIC ZONE IN CONJUNCTION WITH THE INCREASING INFLUENCE OF AN
UPSTREAM IMPULSE RAPIDLY APPROACHING THE OZARK PLATEAU SHOULD SERVE
TO SUSTAIN ONGOING STORMS ACROSS REMAINDER OF WW AREA.

GIVEN THE STRONG WIND FIELD IN PLACE...THE THREAT FOR DAMAGING
WINDS...HAIL AND ISOLATED TORNADOES WILL EXIST WITH SMALLER-SCALE
BOWS/MESOVORTICES EMBEDDED WITHIN CONVECTIVE BAND.

..MEAD.. 11/23/2010


ATTN...WFO...IND...PAH...LOT...ILX...LSX...LZK...SGF...

LAT...LON 36579396 37569287 38869072 40078884 40598794 40078752
39428755 38898809 37329098 36499153 36419155 36579396
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#33 Postby Dave » Mon Nov 22, 2010 9:59 pm

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 749
NWS STORM PREDICTION CENTER NORMAN OK
825 PM CST MON NOV 22 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

EASTERN ARKANSAS
SOUTHERN ILLINOIS
SOUTHWEST INDIANA
WESTERN KENTUCKY
SOUTHEAST MISSOURI
NORTHWEST MISSISSIPPI
WESTERN TENNESSEE

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 825 PM UNTIL
400 AM CST.

TORNADOES...HAIL TO 1 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES EAST NORTHEAST OF
MOUNT VERNON ILLINOIS TO 55 MILES EAST SOUTHEAST OF LITTLE ROCK
ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 746...WW 747...WW 748...

DISCUSSION...SHOWERS/TSTMS FORMING ALONG SW-NE PREFRONTAL CONFLUENCE
ZONE...AND STORMS ALONG FRONTAL BAND FARTHER NW...EXPECTED TO
PERSIST AND POSSIBLY INCREASE THROUGH EARLY TUE AS REGION IS GLANCED
BY SHORTWAVE IMPULSE NOW CROSSING KS. STRONG WIND FIELD WITH
SUBSTANTIAL LOW-LVL DIRECTIONAL SHEAR...AND CONTINUED LOW-LL
MOISTURE INFLOW NNEWD THROUGH THE MS VLY...SUGGEST POTENTIAL FOR A
FEW SUSTAINED STORMS/SUPERCELLS. THESE COULD YIELD MARGINALLY SVR
HAIL...LOCALLY DMGG WIND...AND /MAINLY WITH PRE-FRONTAL
ACTIVITY/...A COUPLE TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 24045.


...CORFIDI
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Re: Severe Weather Event Thanksgiving Week.

#34 Postby srainhoutx » Tue Nov 23, 2010 9:35 am

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1257 AM CST TUE NOV 23 2010

VALID 241200Z - 251200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS EASTERN OK/SOUTHEAST KS
AND MUCH OF SOUTHERN MO/NORTHERN AR...


...EASTERN OK/SOUTHEAST KS/ARKLATEX TO THE MIDDLE MS/LOWER OH
VALLEYS...
A BROAD/STRONG UPPER TROUGH IS EXPECTED TO ADVANCE EASTWARD OVER THE
NORTHERN/CENTRAL PORTIONS OF THE ROCKIES AND PLAINS ON WEDNESDAY. IN
THE LOW LEVELS...WITH A RESERVOIR OF RELATIVELY RICH MOISTURE ACROSS
THE ARKLATEX/LOWER MS VALLEY...A WARM/MOIST AIRMASS WILL QUICKLY
RETREAT NORTHWARD AHEAD OF A CENTRAL PLAINS/LOWER MO VALLEY SURFACE
LOW AND COLD FRONT/PRE-FRONTAL TROUGH.

IT IS LIKELY THAT SHOWERS/TSTMS WILL BE ONGOING EARLY IN THE DAY
ACROSS MUCH OF THE REGION. THIS PROVIDES SOME UNCERTAINTY REGARDING
THE DEGREE OF SUBSEQUENT SURFACE BASED DESTABILIZATION ESPECIALLY
WITH NORTHEASTWARD EXTENT INTO THE MIDDLE MS/LOWER OH VALLEYS.
NONETHELESS...AS THE BOUNDARY LAYER GRADUALLY DESTABILIZES AND
HEIGHT FALLS BEGIN TO OVERSPREAD THE NEAR-COLD FRONTAL WARM
SECTOR...CURRENT THINKING IS THAT SURFACE BASED/POTENTIALLY SEVERE
TSTMS WILL PROBABLY DEVELOP/INCREASE DURING THE AFTERNOON/EARLY
EVENING HOURS...PRIMARILY AHEAD OF THE AFOREMENTIONED SURFACE LOW
AND SOUTHWESTWARD EXTENDING COLD FRONT/PRE-FRONTAL TROUGH. THIS
INITIAL DEVELOPMENT APPEARS MOST LIKELY ACROSS PORTIONS OF SOUTHEAST
KS/EASTERN OK/SOUTHWEST MO/NORTHWEST AR.

WITH SURFACE DEWPOINTS IN THE LOWER TO MIDDLE 60S F ACROSS THE WARM
SECTOR...SUFFICIENT /ALBEIT MODEST/ INSTABILITY COUPLED WITH
INCREASINGLY STRONG DEEP LAYER/LOW LEVEL FLOW...ACCENTUATED BY 65-95
KT AT 500 MB AND 1 KM FLOW STRENGTHENING TO IN EXCESS OF 50
KT...WILL SUPPORT THE POSSIBILITY OF AN ORGANIZED/SUSTAINED SEVERE
RISK. SUCH A THREAT MAY PERSIST WELL THROUGH THE
EVENING/OVERNIGHT...AND DEVELOP AS FAR EAST AS THE MIDDLE MS/LOWER
OH VALLEYS. EARLY MODAL SUPERCELLS ARE A DISTINCT
POSSIBILITY...BEFORE A FAST MOVING/QUASI-LINEAR MODE DOMINATES. SOME
SEVERE HAIL MAY BE POSSIBLE WITH INITIAL DEEP CONVECTIVE
DEVELOPMENT...BUT OTHERWISE...THE PRIMARY SEVERE POTENTIAL SHOULD BE
FOR DAMAGING WINDS/ISOLATED TORNADOES.

..GUYER.. 11/23/2010
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#35 Postby wx247 » Tue Nov 23, 2010 10:46 pm

Local media really playing up severe threat for tomorrow. From what I can tell, it does look like we could see some big storms here. I have some concern about instability levels... but time will tell.
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Re: Severe Weather Event Thanksgiving Week.

#36 Postby TwisterFanatic » Tue Nov 23, 2010 11:41 pm

EHI looking good in Eastern Oklahoma tomorrow..

Image

Lots of shear tomorrow. If we can get some good sunshine there will be some BIG storms.
Last edited by TwisterFanatic on Wed Nov 24, 2010 12:59 pm, edited 1 time in total.
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Re: Severe Weather Event Thanksgiving Week.

#37 Postby srainhoutx » Wed Nov 24, 2010 8:56 am

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0630 AM CST WED NOV 24 2010

VALID 241300Z - 251200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM PORTIONS OF ERN OK...NWRN
AR...AND MUCH OF MO....


A LARGE UPPER TROUGH OVER THE WESTERN UNITED STATES WILL PROGRESS
EASTWARD TODAY INTO THE CENTRAL PLAINS. MEANWHILE...A STRONG COLD
FRONT WILL SURGE SOUTHEASTWARD THROUGH THE CENTRAL PLAINS AND INTO
MO/AR/OK BY THURSDAY MORNING. INCREASINGLY STRONG SOUTHERLY LOW
LEVEL WINDS TO THE SOUTH OF THE FRONT WILL TRANSPORT RICH GULF
MOISTURE NORTHWARD WITH DEWPOINTS IN THE MID 60S EXPECTED INTO
NORTHEAST OK BY AFTERNOON. A FEW BREAKS IN THE CLOUDS AND
STEEPENING MID LEVEL LAPSE RATES WILL HELP TO YIELD AFTERNOON MLCAPE
VALUES APPROACHING 1000 J/KG IN EASTERN OK/SOUTHWEST MO.

SCATTERED THUNDERSTORMS ARE ONGOING THIS MORNING OVER PORTIONS OF
EASTERN KS AND MUCH OF MO. THIS ACTIVITY WILL LIFT
NORTHEASTWARD...WITH MUCH OF OK/AR/MO RELATIVELY DRY FOR MUCH OF THE
DAY. BY LATE AFTERNOON...SCATTERED THUNDERSTORMS ARE EXPECTED TO
RE-FORM ALONG/AHEAD OF THE APPROACHING SURFACE COLD FRONT. FORECAST
SOUNDINGS SUGGEST LOW LEVEL AND DEEP LAYER VERTICAL SHEAR PROFILES
WILL BE VERY FAVORABLE FOR SUPERCELLS. INCREASING LARGE SCALE
FORCING FOR ASCENT OVER THE WARM SECTOR MAY RESULT IN A FEW DISCRETE
SUPERCELLS AHEAD OF THE FRONT OVER SOUTHWEST MO. THESE WOULD POSE
THE RISK OF A FEW TORNADOES DURING THE EVENING HOURS.
OTHERWISE...DAMAGING WINDS AND HAIL APPEAR POSSIBLE AS STORMS BECOME
MORE NUMEROUS ALONG THE COLD FRONT AND SAG SOUTHWARD ACROSS THE
SLIGHT RISK AREA.

..HART/RACY.. 11/24/2010
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#38 Postby wx247 » Wed Nov 24, 2010 12:54 pm

Sun is out... oh boy... this is going to be a long evening.
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Re: Severe Weather Event Thanksgiving Week.

#39 Postby TwisterFanatic » Wed Nov 24, 2010 1:02 pm

Moisture has returned nicely overnight...

Image

Air Temperatures are also in the mid 70's.
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Re:

#40 Postby johnmarkthom » Wed Nov 24, 2010 1:32 pm

wx247 wrote:Sun is out... oh boy... this is going to be a long evening.


I am afraid you are correct.
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