U.S. & Caribbean Weather Discussions and Severe Weather Events
Moderator: S2k Moderators
Forum rules
The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or
STORM2K.
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1221 Postby TexasStooge » Sat Apr 15, 2006 8:34 am
Code: Select all
MESOSCALE DISCUSSION 0509
NWS STORM PREDICTION CENTER NORMAN OK
0134 AM CDT SAT APR 15 2006
AREAS AFFECTED...SWRN VA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 150634Z - 150830Z
THUNDERSTORMS MAY POSE A THREAT FOR ISOLATED HAIL AND STRONG WIND
GUSTS AS THEY MOVE THROUGH SWRN VA NEXT FEW HOURS. TRENDS WILL
CONTINUE TO BE MONITORED FOR INTENSIFICATION.
EARLY THIS MORNING A SMALL CLUSTER OF STORMS CONTINUES OVER SWRN VA
NEAR TIMBERLAKE. ACTIVITY IS DEVELOPING ALONG THE LEADING EDGE OF AN
OUTFLOW BOUNDARY THAT CONTINUES TO SPREAD ESEWD. OBJECTIVE ANALYSIS
SHOWS THE DOWNSTREAM ATMOSPHERE IS MODERATELY UNSTABLE WITH MUCAPE
FROM 1500 TO 2000 J/KG AND A MODEST CAP. RECENT SURFACE OBSERVATIONS
SHOW WIND GUSTS AROUND 31 KT ALONG THE GUST FRONT. GUST FRONT
CONVERGENCE AND THE MODEST CAP SUGGEST STORMS MAY CONTINUE TO
DEVELOP EWD NEXT FEW HOURS. THE BOUNDARY LAYER HAS UNDERGONE SOME
STABILIZATION AND COOLING...AND THIS MAY SERVE AS AN OVERALL
LIMITING FACTOR. HOWEVER...STEEP MID LEVEL LAPSE RATES AND MODERATE
MUCAPE SUGGEST THE STRONGER STORMS MAY BE CAPABLE OF PRODUCING HAIL.
INCREASING LOW-MID LEVEL WLY KINEMATIC PROFILES ASSOCIATED WITH A
SHORTWAVE TROUGH MOVING ESEWD TOWARD THE MID ATLANTIC MAY ALSO
ENHANCE POTENTIAL FOR ISOLATED STRONG WIND GUSTS.
..DIAL.. 04/15/2006
ATTN...WFO...AKQ...LWX...RNK...
37947906 37517802 36927827 36757915 37638006
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1222 Postby TexasStooge » Sat Apr 15, 2006 10:10 pm
Code: Select all
MESOSCALE DISCUSSION 0510
NWS STORM PREDICTION CENTER NORMAN OK
1159 AM CDT SAT APR 15 2006
AREAS AFFECTED...SERN PA...SRN NJ...DELMARVA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 151659Z - 151800Z
POTENTIAL FOR SEVERE THUNDERSTORMS EXPECTED TO INCREASE ACROSS
PORTIONS OF SERN PA...SRN NJ...AND THE DELMARVA REGION INTO THE
AFTERNOON. A SEVERE THUNDERSTORM WATCH MAY BE NEEDED IN THE NEXT
HOUR OR SO.
ISOLATED CONVECTION APPEARS TO BE DEVELOPING NEAR COLD
FRONT/LEE-TROUGH INTERSECTION NOW OVER SERN PA. AIR MASS AHEAD OF
THIS DEVELOPMENT WAS BECOMING INCREASINGLY UNSTABLE WITH LATEST
DIAGNOSTIC DATA INDICATING MLCAPE AROUND 1000 J/KG FROM ERN/NRN VA
TO SRN NJ. ANOTHER HOUR OR SO OF HEATING SHOULD EFFECTIVELY
ELIMINATE REMAINING INHIBITION AND CONTRIBUTE TO INCREASING STORM
INITIATION ACROSS THE REGION. EFFECTIVE SHEAR WILL SUPPORT STORM
ORGANIZATION AND INTENSIFICATION AND A FEW SUPERCELLS WITH HAIL
APPEAR POSSIBLE. IN ADDITION...STORMS FORMING AND MERGING AHEAD OF
THE FRONT AND LEE-TROUGH COULD EVOLVE INTO FAST MOVING SMALL SCALE
LINE SEGMENTS WITH SCATTERED WIND DAMAGE POSSIBLE FROM THIS
ACTIVITY. A SEVERE THUNDERSTORM WATCH MAY BE NEEDED IN THE NEXT HOUR
OR SO TO COVER PARTS OF THE AREA THROUGH EARLY EVENING.
..CARBIN.. 04/15/2006
ATTN...WFO...PHI...AKQ...CTP...LWX...RNK...
40287565 40257461 39707424 37877536 36947597 36727688
36927768 37327878 37907901 39337731 39887678
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1223 Postby TexasStooge » Sat Apr 15, 2006 10:11 pm
Code: Select all
MESOSCALE DISCUSSION 0511
NWS STORM PREDICTION CENTER NORMAN OK
0114 PM CDT SAT APR 15 2006
AREAS AFFECTED...SOUTHERN SD
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 151814Z - 151945Z
THREAT FOR ISOLATED LARGE HAIL MAY INCREASE THROUGH EARLY/MID
AFTERNOON ACROSS SOUTHERN SD. GIVEN EXPECTED MARGINAL/ISOLATED
NATURE...A SEVERE WATCH IS NOT CURRENTLY ANTICIPATED...BUT
CONVECTIVE TRENDS WILL BE MONITORED.
ARC OF TSTMS HAS RECENTLY INCREASED IN INTENSITY ACROSS SOUTHERN
SD...LIKELY TIED TO INCREASING ELEVATED INSTABILITY VIA
DRYSLOT/FORCING FOR ASCENT ASSOCIATED WITH CENTRAL HIGH PLAINS
CYCLONE. 17Z RUC/09Z NAMKF SOUNDINGS SUGGEST MUCAPE WILL GENERALLY
REMAIN AT 300-500 J/KG OR LESS ACROSS MUCH OF SOUTHERN SD. GIVEN THE
ELEVATED NATURE OF BUOYANCY...LARGE HAIL WOULD BE THE PRIMARY
HAZARD. CURRENT EXPECTATIONS ARE THAT THE THREAT WILL REMAIN
SUFFICIENTLY MARGINAL/ISOLATED GIVEN MODEST INSTABILITY/CLOUD
BEARING SHEARING SUCH THAT A WATCH MAY NOT BE NEEDED...HOWEVER WILL
CONTINUE TO MONITOR.
..GUYER.. 04/15/2006
ATTN...WFO...FSD...ABR...UNR...
43230242 44080258 44760155 44709833 43429766 43169945
43150077
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1224 Postby TexasStooge » Sat Apr 15, 2006 10:11 pm
Code: Select all
MESOSCALE DISCUSSION 0512
NWS STORM PREDICTION CENTER NORMAN OK
0142 PM CDT SAT APR 15 2006
AREAS AFFECTED...UPPER OH VALLEY EAST TO SRN NJ/DELMARVA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 151842Z - 151945Z
AREAS ALONG AND SOUTH OF SLOW MOVING COLD FRONT...FROM SERN OH...
ACROSS WV...TO DELMARVA AND SRN NJ...ARE STILL BEING MONITORED FOR A
POSSIBLE SEVERE THUNDERSTORM WATCH THIS AFTERNOON. HOWEVER...RECENT
TRENDS IN RADAR IMAGERY SUGGEST STORM DEVELOPMENT IS OCCURRING
SLOWER THAN EARLIER EXPECTED.
WAVE CLOUDS OVER AND DOWNWIND FROM THE APPALACHIAN CREST APPEAR TO
BE SLOWLY ERODING AS DEEPER MIXING/HEATING CONTINUES ACROSS THE
REGION AHEAD OF A SLOW MOVING FRONT. BOUNDARY LAYER WAS MOST
UNSTABLE ACROSS NRN/ERN VA INTO MD ATTM AND STORMS MAY INCREASE OVER
THIS AREA WHERE LEE-TROUGH/FRONT CONVERGENCE IS MAXIMIZED OVER THE
NEXT 1-2 HOURS. FARTHER WEST...LIFT ALONG THE FRONTAL ZONE SHOULD BE
SUFFICIENT FOR AT LEAST ISOLATED STORMS IN MODERATELY UNSTABLE
ENVIRONMENT. STRONG NWLY FLOW ALOFT WILL PERSIST ACROSS THE REGION
AND RESULT IN DEEP LAYER SHEAR SUPPORTIVE OF STORM ORGANIZATION.
PRIMARY LIMITING FACTOR APPEARS TO BE LACK OF GREATER LARGE SCALE
FORCING FOR ASCENT AND THIS COULD LIMIT OVERALL STORM COVERAGE. IF
AN AREA OF GREATER SEVERE STORM POTENTIAL BECOMES CLEARER IN THE
NEXT HOUR OR SO...A WATCH IS STILL POSSIBLE FOR DEVELOPING/EVOLVING
CONVECTION.
..CARBIN.. 04/15/2006
ATTN...WFO...PHI...AKQ...CTP...LWX...RNK...PBZ...RLX...ILN...
38338039 38558253 39108304 39348192 39767974 39697725
39837517 39757439 38777481 38237539 38137602 38047797
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1225 Postby TexasStooge » Sat Apr 15, 2006 10:11 pm
Code: Select all
MESOSCALE DISCUSSION 0513
NWS STORM PREDICTION CENTER NORMAN OK
0208 PM CDT SAT APR 15 2006
AREAS AFFECTED...WEST CENTRAL/CENTRAL INTO EXTREME NORTH CENTRAL
KS/EASTERN NEB
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 151908Z - 152115Z
SEVERE THREAT IS LIKELY TO INCREASE ACROSS MUCH OF WEST
CENTRAL/CENTRAL NEB INTO EXTREME NORTH CENTRAL KS/EASTERN NEB
THROUGH MID AFTERNOON. A WATCH APPEARS LIKELY BY 20-21Z.
CU FIELD CONTINUES TO EVOLVE ACROSS SOUTHWEST INTO CENTRAL NEB
WITHIN WELL MIXED BOUNDARY LAYER...AHEAD OF SURFACE LOW NEAR NORTH
PLATTE NEB AND IN VICINITY OF QUASI-STATIONARY FRONT/DRYLINE TRIPLE
POINT. GIVEN AMPLE INSOLATION/WEAKENING SURFACE BASED INHIBITION AND
INCREASINGLY STRONG FORCING FOR ASCENT ACROSS WEST CENTRAL/CENTRAL
NEB...INITIATION OF DEEP CONVECTION APPEARS LIKELY IN THE NEXT FEW
HOURS. PRIMARY HAZARDS WILL LIKELY BE LARGE HAIL AND DAMAGING WIND
GUSTS...ATTRIBUTABLE TO MODEST INSTABILITY AND WELL MIXED BOUNDARY
LAYER. SOME THREAT FOR TORNADOES MAY EXIST GIVEN AMBIENT VERTICAL
VORTICITY/STEEP LAPSE RATE ENVIRONMENT IN OTHERWISE MARGINAL
MOISTURE /UPPER 40S TO MIDDLE 50S SURFACE DEWPOINTS/.
..GUYER.. 04/15/2006
ATTN...WFO...OAX...GID...LBF...
41050041 41210144 42610157 42709844 42229754 40239689
39999795 40819917
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1226 Postby TexasStooge » Sat Apr 15, 2006 10:12 pm
Code: Select all
MESOSCALE DISCUSSION 0514
NWS STORM PREDICTION CENTER NORMAN OK
0348 PM CDT SAT APR 15 2006
AREAS AFFECTED...EASTERN KS/NORTHEAST OK INTO WESTERN MO
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 152048Z - 152215Z
MONITORING CONVECTIVE TRENDS FOR SURFACE BASED STORM DEVELOPMENT
LATE THIS AFTERNOON/EARLY EVENING ACROSS EAST CENTRAL KS INTO OK. A
WATCH COULD BE NEEDED IN THE NEXT FEW HOURS...NAMELY ACROSS EASTERN
KS INTO WESTERN MO.
MID LEVEL CONVECTION ABOVE WELL CAPPED BOUNDARY LAYER -- REFERENCE
SPECIAL 18Z RAOBS FROM TOPEKA KS/SPRINGFIELD MO -- HAS PERSISTED
MUCH OF THE AFTERNOON ACROSS EASTERN KS...WITH RELATIVELY NEWER MID
LEVEL DEVELOPMENT ACROSS NORTHEAST KS IN AREAS NORTH/WEST OF TULSA.
WHILE THIS ACTIVITY COULD POSE A HAIL THREAT AS IT PROGRESSES ENE
INTO MO...PRIMARY SEVERE THREAT/SURFACE BASED DEVELOPMENT MAY
DEVELOP IN VICINITY OF DRYLINE ACROSS EAST CENTRAL KS...CURRENTLY
FROM NEAR CONCORDIA-SALINA TO WICHITA...AND PERHAPS EVEN INTO NORTH
CENTRAL/NORTHEAST OK. BOUNDARY LAYER CU HAS EVOLVED OVER THE PAST
HALF HOUR INVOF THE DRYLINE. WHILE LIKLIHOOD/EXTENT OF SURFACE BASED
CONVECTION REMAINS UNCLEAR...STRONG HEATING COUPLED WITH FORCING FOR
ASCENT ASSOCIATED WITH CENTRAL HIGH PLAINS CYCLONE MAY LEAD TO
INITIATION OF DEEP CONVECTION LATE THIS AFTERNOON/EARLY EVENING.
COMBINATION OF MODERATE INSTABILITY/AMPLE EFFECTIVE BULK SHEAR WOULD
BE FAVORABLE FOR SUPERCELLS...WITH ATTENDANT THREATS OF LARGE
HAIL/DAMAGING WINDS. TORNADO THREAT MAY INCREASE AS STORMS DEVELOP
EASTWARD ACROSS FAR EASTERN KS INTO WESTERN MO EARLY THIS EVENING.
..GUYER.. 04/15/2006
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...
39169705 39529616 39829434 39379332 37409354 36579502
36419683 37369744
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1227 Postby TexasStooge » Sat Apr 15, 2006 10:12 pm
Code: Select all
MESOSCALE DISCUSSION 0515
NWS STORM PREDICTION CENTER NORMAN OK
0448 PM CDT SAT APR 15 2006
AREAS AFFECTED...CENTRAL OK/FAR NORTH CENTRAL TX
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 152148Z - 152315Z
MONITORING FOR HIGHLY CONDITIONAL/ISOLATED SEVERE THREAT ACROSS
CENTRAL OK INTO FAR NORTH CENTRAL TX LATE THIS AFTERNOON/EARLY
EVENING. A WATCH IS NOT ANTICIPATED.
MONITORING EVOLUTION OF POCKETS OF HIGH BASED BOUNDARY LAYER CU IN
VICINITY OF DRYLINE ACROSS CENTRAL OK INTO NORTH CENTRAL TX. LATEST
ANALYSIS/OBSERVATIONAL TRENDS FEATURES STRONG MIXING/WEAKENING
SURFACE BASED CINH -- WITH TEMPERATURES OVER 100F IN SOUTHWEST OK --
AND AMPLE MASS CONVERGENCE INVOF DRYLINE FROM WEST OF THE OKC METRO
AREA TO NEAR DUNCAN OK AND EAST OF WICHITA FALLS TX. IN THIS
CORRIDOR...VIA DEEP MIXING/GLANCING UPPER SUPPORT...SOME POTENTIAL
EXISTS FOR A STORM OR TWO TO DEVELOP LATE THIS AFTERNOON/EARLY
EVENING ACROSS CENTRAL OK/NORTH CENTRAL TX. CONDITIONAL POTENTIAL
WOULD EXIST FOR LARGE HAIL AND STRONG WIND GUSTS THROUGH EARLY
EVENING.
..GUYER.. 04/15/2006
ATTN...WFO...TSA...FWD...OUN...
35909754 36239665 35749615 34009656 33429750 33949844
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1228 Postby TexasStooge » Sat Apr 15, 2006 10:12 pm
Code: Select all
MESOSCALE DISCUSSION 0516
NWS STORM PREDICTION CENTER NORMAN OK
0500 PM CDT SAT APR 15 2006
AREAS AFFECTED...CENTRAL/EASTERN NEB AND NORTHEAST KS INTO WESTERN
IA/NORTHWEST MO
CONCERNING...TORNADO WATCH 190...
VALID 152200Z - 152330Z
TORNADO WATCH 190 CONTINUES UNTIL 03Z ACROSS CENTRAL/EASTERN NEB AND
NORTHEAST KS. AN ADDITIONAL TORNADO WATCH WILL BE ISSUED SOON FOR
WESTERN IA AND NORTHWEST MO.
AMBIENT ENVIRONMENT REMAINS FAVORABLE FOR SUPERCELLS AND LARGE
HAIL/ISOLATED TORNADOES ACROSS MUCH OF CENTRAL/EASTERN NEB AND
NORTHEAST KS...FOCUSED INVOF DRYLINE AND OCCLUSION/WARM FRONT TRIPLE
POINT. TORNADOES HAVE ALREADY BEEN REPORTED IN GAGE COUNTY NEB. IN
PRESENCE OF MODERATE INSTABILITY/AMPLE VERTICAL SHEAR...STORMS WILL
CONTINUE TO DEVELOP EASTWARD EARLY THIS EVENING INTO WESTERN
IA/NORTHWEST MO...WITH STORMS POTENTIALLY BREACHING THE EASTERN
EXTENT OF TORNADO WATCH 190 BY AROUND 23Z. FLOW FIELDS WILL REMAIN
FAVORABLE FOR ROTATING STORMS/ISOLATED TORNADOES...WITH LOW LEVEL
MOISTURE CONTINUING TO INCREASE ALONG THE MISSOURI RIVER ACROSS
NORTHWEST MO/SOUTHWEST IA EARLY THIS EVENING.
..GUYER.. 04/15/2006
ATTN...WFO...DMX...EAX...FSD...OAX...TOP...GID...LBF...
42459827 42569653 42419426 41389305 39839303 39219392
39309571 40189639 41279710 41809867
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1229 Postby TexasStooge » Sat Apr 15, 2006 10:13 pm
Code: Select all
MESOSCALE DISCUSSION 0517
NWS STORM PREDICTION CENTER NORMAN OK
0559 PM CDT SAT APR 15 2006
AREAS AFFECTED...PORTIONS WV...VA...MD...DE...DC
CONCERNING...SEVERE THUNDERSTORM WATCH 189...191...
VALID 152259Z - 160030Z
PRONOUNCED SUPERCELL WITH REFLECTIVITY HOOK HAS MOVED SEWD OFFSHORE
CAPE CHARLES REGION AND OVER ATLANTIC. STRONGEST VERTICAL SHEAR
PROFILES ARE EVIDENT FROM SRN DELMARVA PENINSULA SWD ALONG COASTAL
FRONT INTO EXTREME NERN NC...W OF WHICH SFC FLOW IS WLY. SFC
MESOANALYSIS SHOWS COLD FRONT AND ATTENDANT SFC DRYING/VEERING FROM
SERN PA SWWD ACROSS SRN WV. AIR MASS IN BETWEEN THESE BOUNDARIES
REMAINS CHARACTERIZED BY STRONG HEATING AND SFC DEW POINTS GENERALLY
IN 50S F...EXCEPT ACROSS SRN WV WHERE MIXING HAS YIELDED 40S F
VALUES. LACK OF SUBSTANTIAL CONVERGENCE IN THIS AIR MASS WILL
CONTINUE TO LIMIT CONVECTIVE COVERAGE...THOUGH ANY SUSTAINED TSTMS
SUCH AS THOSE MOVING SEWD ACROSS NORTHUMBERLAND COUNTY VA MAY
PRODUCE DAMAGING WIND AND LARGE HAIL FROM THERE ACROSS SRN
CHESAPEAKE BAY TO PORTIONS SRN ACCOMACK/NORTHAMPTON COUNTIES.
VIS IMAGERY AND REFLECTIVITY TRENDS INDICATE SEVERE TSTM POTENTIAL
HAS DIMINISHED SUBSTANTIALLY ACROSS WV...EWD ACROSS PORTIONS
WRN/CENTRAL/NRN VA...EWD TO CENTRAL/NRN DELMARVA REGION. OVERALL
CONVECTIVE COVERAGE AND INTENSITY SHOULD CONTINUE TO DIMINISH DURING
NEXT FEW HOURS WITH LOSS OF DIURNAL HEATING AND INCREASING SBCINH.
..EDWARDS.. 04/15/2006
ATTN...WFO...AKQ...LWX...RNK...
38097978 38357952 38467927 38587744 38477584 38347518
38177480 37727504 37097542 36557552 36487599 36577867
37727859
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1230 Postby TexasStooge » Sat Apr 15, 2006 10:13 pm
Code: Select all
MESOSCALE DISCUSSION 0518
NWS STORM PREDICTION CENTER NORMAN OK
0617 PM CDT SAT APR 15 2006
AREAS AFFECTED...NORTHERN/EASTERN NEB AND NORTHEAST KS INTO WESTERN
IA/NORTHWEST MO
CONCERNING...TORNADO WATCH 190...192...
VALID 152317Z - 160045Z
VALID PORTION OF TORNADO WATCH 190 CONTINUES UNTIL 03Z...TORNADO
WATCH 192 CONTINUES UNTIL 05Z.
ISOLATED TORNADO AND LARGE HAIL/DAMAGING WIND THREAT CONTINUES
ACROSS VALID PORTIONS OF TORNADO WATCHES 190/192 THIS EVENING FROM
NORTHERN/EASTERN NEB AND NORTHEAST KS INTO WESTERN IA/NORTHWEST MO.
POTENTIALLY SIGNIFICANT TORNADO DAMAGE WAS REPORTED EARLIER NEAR
BEATRICE NEB.
WITHIN THESE TORNADO WATCHES...RELATIVELY GREATEST TORNADO POTENTIAL
THROUGH EARLY EVENING APPEARS TO BE FROM EXTREME SOUTHEAST NEB/FAR
NORTHEAST KS INTO SOUTHWEST IA AND NORTHWEST MO...INCLUDING AREAS
FROM TOPEKA KS-ST JOSEPH MO-MARYVILLE MO TO RED OAK/CRESTON IA. IN
THIS CORRIDOR...SCATTERED SUPERCELLS ARE ONGOING AND LIKELY TO
PERSIST IN RATHER FAVORABLE ENVIRONMENT INVOF DRYLINE AND WARM
FRONT/OCCLUSION. THE NEAR STORM ENVIRONMENT IS CHARACTERIZED BY
BACKED SOUTHEASTERLY WINDS AND BOUNDARY LAYER DEWPOINTS IN THE LOWER
60S/SURFACE TEMP-DEWPOINT DEPRESSIONS OF 15-20 F.
..GUYER.. 04/15/2006
ATTN...WFO...DMX...EAX...FSD...OAX...TOP...LBF...
42689901 42569653 42119481 41249313 39839303 39219392
38529576 39989591 41399685 42049893
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1231 Postby TexasStooge » Sat Apr 15, 2006 10:13 pm
Code: Select all
MESOSCALE DISCUSSION 0519
NWS STORM PREDICTION CENTER NORMAN OK
0641 PM CDT SAT APR 15 2006
AREAS AFFECTED...SOUTHEAST SD/NORTHWEST IA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 152341Z - 160115Z
SEVERE THREAT MAY DEVELOP THROUGH EARLY/MID EVENING ACROSS FAR
SOUTHEAST SD INTO NORTHWEST IA. ALTHOUGH A SEVERE TSTM WATCH IS NOT
CURRENTLY ANTICIPATED...WILL CONTINUE TO MONITOR CONVECTIVE TRENDS
ON NORTHERN PERIPHERY OF TORNADO WATCHES 190/192.
ARC OF STRONG/SEVERE TSTMS...WITH SOME EMBEDDED SUPERCELLS AND
HISTORY OF LARGE HAIL...EXTENDS ACROSS FAR NORTHEAST NEB TO ALONG
THE NEB/IA BORDER AS OF 2340Z. AS THIS ACTIVITY SPREADS FURTHER
EAST/NORTHEAST...AT LEAST AN ISOLATED THREAT MAY EXTEND INTO FAR
SOUTHEAST SD/NORTHWEST IA THIS EVENING. WITH WARM SECTOR/RICHER
THETA-E REMAINING SUFFICIENTLY SOUTH OF THE AREA...PRIMARY SEVERE
HAZARD WOULD BE LARGE HAIL. LATEST RUC FORECAST SOUNDINGS SUGGEST
POTENTIAL FOR 500-1000 J/KG ELEVATED MUCAPE...MAXIMIZED THIS EVENING
ACROSS NORTHWEST IA.
..GUYER.. 04/15/2006
ATTN...WFO...DMX...FSD...
43229733 43629730 43659624 43289332 42399331 42309464
42379615 42509665
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1232 Postby TexasStooge » Sat Apr 15, 2006 10:14 pm
Code: Select all
MESOSCALE DISCUSSION 0520
NWS STORM PREDICTION CENTER NORMAN OK
0914 PM CDT SAT APR 15 2006
AREAS AFFECTED...PORTIONS ERN KS...NWRN MO...WRN IA
CONCERNING...TORNADO WATCH 192...
VALID 160214Z - 160345Z
BROKEN LINE OF SEVERE TSTMS FROM MKC AREA NNEWD TO SW OF DSM
INCLUDED AT LEAST TWO POTENTIALLY TORNADIC SUPERCELLS AS OF 2Z -- IN
N-CENTRAL/NERN PORTIONS KC METRO AND DEKALB/DAVIESS COUNTY MO. ALL
MODES OF SEVERE REMAIN POSSIBLE FROM THIS BAND AS IT MOVES ENEWD
ACROSS NWRN MO AND S-CENTRAL IA NEXT 2-3 HOURS. MEANWHILE SEVERE
POTENTIAL IS INCREASING OVER PORTIONS E-CENTRAL KS AND W-CENTRAL MO
S OF WW 192 WILL BE MONITORED FOR POSSIBLE WW.
MODIFIED TOP RAOB AND RUC SOUNDINGS INDICATE EFFECTIVE LAYER PARCELS
-- IN INFLOW REGION OF NWRN MO CONVECTION -- MAY BECOME INCREASINGLY
ELEVATED ABOVE SFC THROUGH ABOUT 4Z...INDICATING GRADUAL DECREASE IN
TORNADO AND SEVERE WIND POTENTIAL. MEANWHILE...LARGE LOW LEVEL
HODOGRAPHS AND FAVORABLE DEEP-LAYER SHEAR WILL SUPPORT
SUPERCELLS...WITH 0-3 KM SRH UP TO NEAR 600 J/KG AND MLCAPES
1000-1500 J/KG IN PROFILER/VWP DATA AND MODIFIED MODEL SOUNDINGS.
FARTHER SW...SFC MESOANALYSIS SHOWS COLD FRONT HAS MERGED WITH
DRYLINE ACROSS PORTIONS ERN KS -- FROM LWC AREA SWWD ACROSS COWLEY
COUNTY. THIS PROCESS SHOULD CONTINUE/PROPAGATE SWWD ALONG DRYLINE
INTO S-CENTRAL KS AND N-CENTRAL OK. CONVECTION HAS DEVELOPED ALONG
COMBINED BOUNDARY FROM LWC TO GREENWOOD COUNTY KS...IN ZONE OF
MAXIMIZED LOW LEVEL CONVERGENCE ASSOCIATED WITH FRONTAL/DRYLINE
ASCENT. STRONG CINH IS EVIDENT ACROSS NRN OK...SO EVEN WITH FRONTAL
LIFT...BACKBUILDING SHOULD BE LIMITED TO N OF KS/OK BORDER.
DEEP-LAYER WIND AND SHEAR VECTORS HAVE SIGNIFICANT COMPONENT
PARALLEL TO FORCING BOUNDARY...SUPPORTING CONTINUED LINEAR MODE.
..EDWARDS.. 04/16/2006
ATTN...WFO...LSX...DVN...SGF...DMX...EAX...TOP...ICT...
37739608 38259548 38999491 39409419 39879392 40269383
40699392 41269415 41909489 42209441 42149350 41209257
40319232 39489228 38929285 38129401 37779547
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1233 Postby TexasStooge » Sun Apr 16, 2006 10:51 am
Code: Select all
MESOSCALE DISCUSSION 0521
NWS STORM PREDICTION CENTER NORMAN OK
1046 PM CDT SAT APR 15 2006
AREAS AFFECTED...PORTIONS E-CENTRAL/SERN IA...NERN MO...EXTREME NWRN
IL.
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 160346Z - 160545Z
BAND OF STRONG-SEVERE TSTMS NOW OVER ERN-MOST PORTIONS WW 192 IS
EXPECTED TO LIFT NEWD TO AREA BETWEEN CID-UIN THROUGH APPROXIMATELY
7Z. MAIN SEVERE POTENTIAL WILL TRANSITION TO HAIL...WITH OCCASIONAL
STRONG-SEVERE GUSTS ALSO POSSIBLE PARTICULARLY OVER MO. AREA WILL
BE MONITORED FOR POSSIBLE WW.
VERTICAL SHEAR PROFILES ARE STRENGTHENING WITH TIME ACROSS THIS AREA
AS MID/UPPER LEVEL SPEED MAX APCHS...ASSOCIATED WITH NEARLY
VERTICALLY STACKED LOW OVER ERN NEB. HOWEVER...GIVEN DECELERATION
OF THAT CYCLONE AND FCST MOTION OF MAIN BAND OF LOW LEVEL CONVECTIVE
FORCING...PRIND ACTIVITY WILL OUTRUN EWD SPREAD OF OPTIMAL
DEEP-LAYER SHEAR AS WELL. INFLOW PARCELS ARE FCST TO BECOME MORE
ELEVATED OFF SFC WITH TIME AND WITH NWD EXTENT...GIVEN COMBINATION
OF DIABATIC SFC COOLING AND PRECIP COOLING OVER IA. PARCELS MAY
REMAIN NEARLY SFC-BASED FOR ANOTHER FEW HOURS ACROSS PORTIONS NERN
MO...WHERE BOTH MUCAPE AND SEVERE POTENTIAL SHOULD BE MAXIMIZED.
EFFECTIVE SHEARS 35-50 KT ARE EVIDENT IN RUC FCST SOUNDINGS BOTH FOR
CONVECTION ROOTED IN 800-900 MB LAYER OVER IA...AND ANYWHERE BETWEEN
SFC-850 MB ACROSS NERN MO. MUCAPES 1000-1500 J/KG ARE EXPECTED.
..EDWARDS.. 04/16/2006
ATTN...WFO...ILX...LSX...DVN...ARX...DMX...EAX...
39289238 39849236 40049231 40539233 40749256 41079272
41529289 42019304 42869341 43339222 43239153 42539058
41929022 40909043 40489075 39419178 39249222
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1234 Postby TexasStooge » Sun Apr 16, 2006 10:52 am
Code: Select all
MESOSCALE DISCUSSION 0522
NWS STORM PREDICTION CENTER NORMAN OK
1139 PM CDT SAT APR 15 2006
AREAS AFFECTED...PORTIONS WRN/NRN MO AND CENTRAL/SRN IA.
CONCERNING...TORNADO WATCH 192...
VALID 160439Z - 160545Z
CONVECTIVE COVERAGE/INTENSITY...AND ACCORDINGLY SEVERE
POTENTIAL...IS DIMINISHING SIGNIFICANTLY IN WW. REMAINDER WW MAY BE
CANCELED BEFORE SCHEDULED 5Z EXPIRATION OR ALLOWED TO EXPIRE AT THAT
TIME. ACTIVITY STILL IN ERN-MOST COUNTIES OF WW NEAR IRK -- ALONG
TAIL END OF MCS -- IS EXPECTED TO MOVE NEWD ACROSS NERN MO AND SERN
IA WITH OCCASIONAL HAIL AND STRONG-SEVERE GUSTS POSSIBLE. REF SPC
MESOSCALE DISCUSSION 520 FOR DETAILED DISCUSSION ON AREA E OF WW.
MEANWHILE...INITIAL LINE OF FRONTALLY FORCED TSTMS OVER SERN KS
MOSTLY HAS WEAKENED...EXCEPT FOR ISOLATED SEVERE TSTM LOCATED OVER
VERNON COUNTY MO...AS OF 415Z. THIS TSTM HAS DISPLAYED INTERMITTENT
SUPERCELL CHARACTERISTICS AND PRODUCED HAIL ESTIMATED UP TO 1.75
INCH DIAMETER...IN ENVIRONMENT OF STRONG LOW LEVEL SHEAR. 50-60 KT
LLJ CONTRIBUTES TO 0-3 KM SRH EXCEEDING 700 J/KG OVER NARROW
CORRIDOR AHEAD OF CONVECTIVE BAND. EFFECTIVE SHEARS BASED ON RUC
SOUNDINGS HAVE WEAKENED CONSIDERABLY BASED ON STRONG
SBCINH...ALTHOUGH SLGT MODIFICATIONS RESULT IN LIFTED PARCELS ROOTED
NEAR/SLIGHTLY ABOVE SFC. CINH SHOULD CONTINUE TO LIMIT CONVECTIVE
COVERAGE...BUT SRN/CENTRAL MO AREA WILL BE MONITORED FOR POSSIBLE
WW.
..EDWARDS.. 04/16/2006
ATTN...WFO...ILX...LSX...DVN...SGF...EAX...
37629456 38199386 38769341 39419286 40359221 40129083
37879094
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1235 Postby TexasStooge » Sun Apr 16, 2006 10:53 am
Code: Select all
MESOSCALE DISCUSSION 0523
NWS STORM PREDICTION CENTER NORMAN OK
0715 AM CDT SUN APR 16 2006
AREAS AFFECTED...EXTREME SERN IL...WRN KY AND SRN IND
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 161215Z - 161415Z
THUNDERSTORMS MOVING INTO WRN KY FROM EXTREME SERN IL MAY CONTINUE
TO POSE A THREAT FOR ISOLATED MARGINALLY SEVERE HAIL NEXT COUPLE
HOURS. THE THREAT DOES NOT APPEAR SUFFICIENT TO WARRANT A WW AT THIS
TIME.
EARLY THIS MORNING STORMS WERE DEVELOPING FROM EXTREME SRN IL INTO
WRN KY AND SPREADING EWD. STORMS ARE ELEVATED AND ROOTED NEAR 700 MB
BASED ON RUC SOUNDING DATA. STEEP MID LEVEL LAPSE RATES AROUND 8
C/KM AND EFFECTIVE CLOUD LAYER SHEAR SUPPORTIVE OF UPDRAFT ROTATION
WILL SUPPORT HAIL WITH THE STRONGER STORMS. HOWEVER...MODEST MUCAPE
AOB 800 J/KG SUGGESTS OVERALL HAIL SIZE SHOULD GENERALLY REMAIN 1
INCH OR LESS. FORCING FOR ASCENT ASSOCIATED WITH A WSWLY LOW LEVEL
JET AND A VORTICITY LOBE ROTATING THROUGH BASE OF UPPER TROUGH WILL
CONTINUE TO SUPPORT DEVELOPMENT OF STORMS THROUGH WRN KY AND INTO
SRN IL NEXT COUPLE HOURS. ACTIVITY IS SUBSEQUENTLY EXPECTED TO BEGIN
A WEAKENING TREND AS THE LOW LEVEL JET DIMINISHES LATER THIS
MORNING.
..DIAL.. 04/16/2006
ATTN...WFO...LMK...OHX...IND...PAH...
36588898 37478899 38888697 38138575 36638738
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1236 Postby TexasStooge » Sun Apr 16, 2006 9:24 pm
Code: Select all
MESOSCALE DISCUSSION 0524
NWS STORM PREDICTION CENTER NORMAN OK
1057 AM CDT SUN APR 16 2006
AREAS AFFECTED...ERN IA....SRN WI...NWRN IL...NERN MO
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 161557Z - 161800Z
THREAT FOR HAIL PRODUCING THUNDERSTORMS WAS INCREASING ACROSS NERN
IA...SWRN WI...AND PARTS OF NWRN IL LATE THIS MORNING. AREAS FROM
SCNTRL/SERN IA...EAST/SOUTHEAST TO NERN MO/WRN IL MAY SEE AN
INCREASE IN SURFACE-BASED STORMS NEXT FEW HOURS. WATCHES ARE
POSSIBLE ACROSS PARTS OF THESE AREAS...PROBABLY WITHIN 1-2 HOURS.
ARC OF CONVECTION WAS INCREASING IN COVERAGE AHEAD OF DEEP LAYER
CYCLONE OVER IA THIS MORNING. THIS ACTIVITY WAS DEVELOPING TO THE
NORTH OF THE SURFACE WARM FRONT AND EAST OF THE LOW WHERE STRONGER
DYNAMIC FORCING ASSOCIATED WITH THE LARGE SCALE SYSTEM WAS BEGINNING
TO OVERSPREAD LOW LEVEL WARM/MOIST CONVEYOR BELT. GIVEN LAPSE RATES
EVIDENT ON MORNING SOUNDINGS FROM ILX AND DVN...EXPECT THESE STORMS
TO PRODUCE SOME HAIL.
WHILE THE CONVECTION CURRENTLY NORTH OF THE WARM FRONT WAS LIKELY
ROOTED ABOVE CAPPED BOUNDARY LAYER...STORMS ARE EXPECTED TO ROOT
INTO MOIST AND INCREASINGLY UNSTABLE AIR MASS NEAR SFC LOW...AND
ESEWD FROM THE SFC LOW ALONG THE WARM FRONT...AND AHEAD OF WIND
SHIFT/CONFLUENCE LINE MOVING EAST ACROSS NERN MO. DEEP LAYER
VORTICITY AND LOW LEVEL CAPE DEVELOPING NEAR THE SFC LOW...AND
STRONG LOW LEVEL SHEAR/HELICITY IN THE VICINITY OF THE WARM FRONT
SHOULD SUPPORT ROTATING STORMS UPDRAFTS/SUPERCELLS. THIS ACTIVITY IS
EXPECTED TO INTENSIFY AS GREATER WARM SECTOR DESTABILIZATION OCCURS
INTO THE AFTERNOON. THE POTENTIAL FOR LARGE HAIL...AND AN INCREASING
CHANCE OF DAMAGING WINDS/TORNADOES...SUGGEST WATCHES WILL BE NEEDED
OVER PARTS OF THE REGION OVER THE NEXT FEW HOURS.
..CARBIN.. 04/16/2006
ATTN...WFO...LOT...ILX...MKX...LSX...DVN...ARX...DMX...EAX...
40418903 40088919 39618979 39189043 38899092 38769157
38779239 39579231 40229269 40589308 40819363 41319379
41949377 42359353 43139284 43339243 43529131 43649024
43198864 42708843 41958854 40888894
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1237 Postby TexasStooge » Sun Apr 16, 2006 9:25 pm
Code: Select all
MESOSCALE DISCUSSION 0525
NWS STORM PREDICTION CENTER NORMAN OK
0108 PM CDT SUN APR 16 2006
AREAS AFFECTED...EASTERN IL INTO CENTRAL/NORTHERN INDIANA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 161808Z - 161945Z
A TORNADO WATCH APPEARS LIKELY BY 19Z-20Z ACROSS EASTERN IL INTO
CENTRAL/NORTHERN INDIANA. THIS MAY INCLUDE AN UPGRADE OF THE
NORTHEAST IL/NORTHWEST INDIANA PORTION OF SEVERE TSTM WATCH 194.
WATER VAPOR IMAGERY/SURFACE ANALYSIS DEPICTS VERTICALLY STACKED LOW
ACROSS SOUTH CENTRAL/SOUTHEAST IA...WITH WARM FRONT EXTENDING E/SE
ACROSS CENTRAL IL INTO CENTRAL INDIANA...LARGELY PARALLEL WITH THE
INTERSTATE 74 CORRIDOR. MODERATELY AGGRESSIVE DESTABILIZATION
CONTINUES TO OCCUR IN PRESENCE OF AMPLE INSOLATION...WITH
PROGRESSIVELY ACTIVE CU FIELD...ESPECIALLY NOTED IN BOTH SOUTH
CENTRAL IL AND SOUTH CENTRAL INDIANA AT THIS TIME.
ACCORDINGLY...OBJECTIVE ANALYSIS/ADJUSTED RUC SOUNDINGS SUGGESTS
NEGLIGIBLE SURFACE BASED CINH FROM CENTRAL IL INTO CENTRAL
INDIANA...WITH POTENTIAL FOR 1500 J/KG MLCAPE IN THE AMBIENT WARM
SECTOR.
MOST LIKELY SCENARIO IS FOR STRONG/SEVERE STORMS TO SPREAD EASTWARD
OUT OF WESTERN IL INTO EASTERN IL/WESTERN INDIANA THROUGH MID/LATE
AFTERNOON...ALTHOUGH IT REMAINS A DISTINCT POSSIBILITY FOR SOMEWHAT
SEPARATE DEVELOPMENT IN VICINITY OF WARM FRONT THIS AFTERNOON.
EITHER WAY...THREAT FOR SUPERCELLS CAPABLE OF VERY LARGE HAIL AND
TORNADOES WILL STEADILY INCREASE REMAINDER OF THE AFTERNOON. TORNADO
POTENTIAL WILL BE MAXIMIZED IN CORRIDOR ALONG/NORTH OF WARM FRONT
FROM EAST CENTRAL IL INTO CENTRAL/NORTH CENTRAL INDIANA...WHERE
BOUNDARY LAYER FLOW WILL TEND TO REMAIN BACKED WITH SUFFICIENTLY
CURVED/ENLARGED LOW LEVEL HODOGRAPHS.
..GUYER.. 04/16/2006
ATTN...WFO...ILN...IWX...IND...LOT...ILX...
41328829 41288645 40498518 39348489 38808620 38998790
40078855
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1238 Postby TexasStooge » Sun Apr 16, 2006 9:25 pm
Code: Select all
MESOSCALE DISCUSSION 0526
NWS STORM PREDICTION CENTER NORMAN OK
0118 PM CDT SUN APR 16 2006
AREAS AFFECTED...SERN IA...NERN MO...WRN IL
CONCERNING...TORNADO WATCH 193...
VALID 161818Z - 161915Z
SEVERE STORMS ARE EXPECTED TO INCREASE IN COVERAGE AND INTENSITY
INSIDE OF TORNADO WATCH 193 OVER THE NEXT HOUR.
LATEST ANALYSIS PLACES OCCLUDED LOW OVER SCNTRL IA WITH WARM FRONT
EXTENDING EAST INTO NRN IL AND WIND SHIFT/CONFLUENCE AXIS DEVELOPING
EAST INTO WRN IL. STRONGLY DIFFLUENT MID LEVEL FLOW AHEAD OF THE
DEEP LAYER CYCLONE WAS ACTING ON DESTABILIZING WARM SECTOR AIR MASS
FROM SERN IA ACROSS CNTRL IL AND SUPPORTING INCREASING TSTM
DEVELOPMENT OVER THESE AREAS. DEEP LAYER SHEAR OF 40-50KT ACROSS IL
PORTIONS OF THE WATCH IS MORE THAN ADEQUATE FOR SUPERCELLS AND
EXPECT STORMS NOW DEVELOPING ACROSS CNTRL IL TO REACH SEVERE LEVELS
SHORTLY. LARGE HAIL APPEARS TO BE THE MAIN THREAT FROM THIS
CONVECTION. HOWEVER...STORMS NEAR OR CROSSING THE WARM FRONT...FROM
GBG TO PIA...WILL NEED TO BE MONITORED FOR LOW LEVEL ROTATION AND
POSSIBLE TORNADO THREAT GIVEN EFFECTIVE HELICITY VALUES 150-200
MS/S2 BASED ON CELL WSW MOTION AT 25KT.
STORMS NEAR THE LOW AND EAST TO DVN AREA WERE DEVELOPING IN A WEAKER
SHEAR ENVIRONMENT DUE TO WEAKER FLOW NEAR THE LOW CENTER. THIS IS
FURTHER SUPPORTED BY LATEST DVN SOUNDING. HOWEVER...DVN SOUNDING
ALSO DEPICTS SUFFICIENT LOW LEVEL CAPE FOR MODEST UPDRAFT
STRETCHING. GIVEN STRONG BACKGROUND VORTICITY IN VICINITY OF THE
LOW...A FEW OF THESE CELLS COULD ACQUIRE ROTATION AND POSE A HAIL
AND BRIEF TORNADO THREAT INTO THIS AFTERNOON.
..CARBIN.. 04/16/2006
ATTN...WFO...PAH...LOT...ILX...LSX...DVN...ARX...DMX...EAX...
42609347 42629064 40488850 38418828 38169132 40539246
40569349 42149407 42189356
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1239 Postby TexasStooge » Sun Apr 16, 2006 9:26 pm
Code: Select all
MESOSCALE DISCUSSION 0527
NWS STORM PREDICTION CENTER NORMAN OK
0310 PM CDT SUN APR 16 2006
AREAS AFFECTED...SRN WV...WRN VA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 162010Z - 162145Z
A COUPLE OF SEVERE THUNDERSTORMS APPEAR POSSIBLE ACROSS PORTIONS OF
WV AND WRN VA OVER THE NEXT HOUR OR SO. ANTICIPATED SEVERE POTENTIAL
IN TERMS OF AREAL COVERAGE AND DURATION DOES NOT CURRENTLY APPEAR
GREAT ENOUGH TO WARRANT A WATCH IN THIS AREA.
ISOLATED STORMS HAVE INITIATED NEAR STATIONARY FRONT CROSSING THE
CNTRL APPALACHIANS FROM WRN VA INTO SERN WV. DEVELOPMENT OF THIS
ACTIVITY WAS BEING AIDED BY APPROACH OF WEAK SHORT WAVE
TROUGH...UPSLOPE COMPONENT OF THE LOW LEVEL FLOW...AND DIURNAL
DESTABILIZATION. LATEST DIAGNOSTIC DATA SUGGESTS THAT SHEAR AND
INSTABILITY ACROSS THE REGION SHOULD SUPPORT A COUPLE OF ORGANIZED
STORMS WITH SOME CHANCE FOR HAIL AND ISOLATED DAMAGING WINDS.
HOWEVER...WEAK LARGE SCALE FORCING FOR ASCENT...AND DIURNAL NATURE
OF THE INSTABILITY...WOULD SUGGEST THAT SEVERE THREAT SHOULD REMAIN
LIMITED IN TIME AND SPACE. THERE IS SOME INDICATION IN LATEST
GUIDANCE THAT STORM COVERAGE MAY INCREASE ACROSS PARTS OF THE REGION
LATER THIS EVENING AS STRONGER FORCING DEVELOPS EWD FROM THE OH
VALLEY. A WATCH IS NOT BEING PLANNED AT PRESENT.
..CARBIN.. 04/16/2006
ATTN...WFO...LWX...RNK...RLX...
37107906 37028122 37288184 37598172 37778072 37877931
37687898
0 likes
-
TexasStooge
- Category 5

- Posts: 38127
- Joined: Tue Mar 25, 2003 1:22 pm
- Location: Irving (Dallas County), TX
-
Contact:
#1240 Postby TexasStooge » Sun Apr 16, 2006 9:26 pm
Code: Select all
MESOSCALE DISCUSSION 0528
NWS STORM PREDICTION CENTER NORMAN OK
0324 PM CDT SUN APR 16 2006
AREAS AFFECTED...SOUTHEAST MO/SOUTHERN IL/WESTERN KY/SOUTHWEST
INDIANA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 162024Z - 162230Z
CLOSELY MONITORING DEVELOPMENTAL TRENDS ACROSS FAR SOUTHEAST
MO/SOUTHERN IL INTO WESTERN KY/SOUTHWEST INDIANA FOR POSSIBILITY OF
A WATCH ISSUANCE.
ON SOUTHERN PERIPHERY OF TORNADO WATCH 193...MODERATE CU FIELD
EXISTS INVOF SURFACE TROUGH ACROSS FAR SOUTHEAST MO/FAR SOUTHWEST
IL...NAMELY FROM THE ST LOUIS METRO TO NEAR FARMINGTON MO AND POPLAR
BLUFF MO. GIVEN RELATIVELY MORE MODEST MASS CONVERGENCE WITH
SOUTHWARD EXTENT IN WARM SECTOR...LIKELIHOOD/EXTENT OF CONVECTIVE
INITIATION IS QUESTIONABLE PROGRESSIVELY SOUTH. WHILE
DETERMINISTIC/ENSEMBLE MODEL GUIDANCE ARE RATHER SCANT WITH
CONVECTIVE DEVELOPMENT THIS AFTERNOON...LITTLE OR NO CONVECTIVE
INHIBITION EXISTS PER RUC SOUNDINGS...WITH REGION BEING BRUSHED BY
IA CLOSED LOW. WILL CONTINUE TO CLOSELY MONITOR DEVELOPMENT TRENDS
OVER THE NEXT SEVERAL HOURS...AS MLCAPE OF 750-1000 J/KG AND STRONG
VERTICAL SHEAR WOULD FAVOR A SUPERCELL AND LARGE HAIL/TORNADO THREAT
GIVEN DEEP CONVECTION.
..GUYER.. 04/16/2006
ATTN...WFO...LMK...IND...PAH...LSX...SGF...
38329094 38398830 38528634 37448582 36908687 36698847
36748927 36849060 36969127 37519153
0 likes
Return to “USA & Caribbean Weather”
Who is online
Users browsing this forum: Google Adsense [Bot] and 28 guests