Watch going into effect. Hight Theta-E driving convection. Best Hodo on MS-Delta
Posted by JAC on 4/23/2010, 11:25 am
 URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 79 NWS STORM PREDICTION CENTER NORMAN OK 955 AM CDT FRI APR 23 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF PARTS OF SOUTHERN ARKANSAS MUCH OF NORTHERN LOUISIANA PARTS OF NORTHEAST TEXAS EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 955 AM UNTIL 500 PM CDT. TORNADOES...HAIL TO 2.5 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 90 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF LONGVIEW TEXAS TO 65 MILES SOUTHEAST OF MONTICELLO 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. DISCUSSION...THUNDERSTORMS ARE INCREASING IN AREA OF LARGE SCALE ASCENT AND RETURN OF A VERY MOIST UNSTABLE GULF AIR MASS. DEEP LAYER SHEAR IS FAVORABLE FOR SUPERCELLS AND BY EARLY AFTERNOON TORNADIC SUPERCELLS WILL BE LIKELY AS STORMS CONTINUE MOVE/DEVELOP E/NE ACROSS THE WATCH AREA. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 24030. ...HALES Hazard Tornadoes EF2+ Tornadoes Likelihood Moderate Moderate Severe Wind 65 kt+ Wind Moderate Moderate Severe Hail 2"+ Hail Moderate Moderate Note: See the experimental Public Watch (SEL) product with explicit hazard information section below. The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended. Note: Click for Watch Status Reports. SEL9 URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 79 NWS STORM PREDICTION CENTER NORMAN OK 955 AM CDT FRI APR 23 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF PARTS OF SOUTHERN ARKANSAS MUCH OF NORTHERN LOUISIANA PARTS OF NORTHEAST TEXAS EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 955 AM UNTIL 500 PM CDT. SEVERAL TORNADOES ISOLATED INTENSE TORNADOES POSSIBLE SCATTERED DAMAGING WINDS ISOLATED WIND GUSTS TO 70 MPH POSSIBLE SCATTERED LARGE HAIL ISOLATED HAIL TO 2.5 INCHES IN DIAMETER POSSIBLE THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF LONGVIEW TEXAS TO 65 MILES SOUTHEAST OF MONTICELLO 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. DISCUSSION...THUNDERSTORMS ARE INCREASING IN AREA OF LARGE SCALE ASCENT AND RETURN OF A VERY MOIST UNSTABLE GULF AIR MASS. DEEP LAYER SHEAR IS FAVORABLE FOR SUPERCELLS AND BY EARLY AFTERNOON TORNADIC SUPERCELLS WILL BE LIKELY AS STORMS CONTINUE MOVE/DEVELOP E/NE ACROSS THE WATCH AREA. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 24030. ...HALES Hazard Tornadoes EF2+ Tornadoes Likelihood Moderate Moderate Severe Wind 65 kt+ Wind Moderate Moderate Severe Hail 2"+ Hail Moderate Moderate SEL9 URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 79 NWS STORM PREDICTION CENTER NORMAN OK 955 AM CDT FRI APR 23 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF PARTS OF SOUTHERN ARKANSAS MUCH OF NORTHERN LOUISIANA PARTS OF NORTHEAST TEXAS EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 955 AM UNTIL 500 PM CDT. TORNADOES...HAIL TO 2.5 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 90 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF LONGVIEW TEXAS TO 65 MILES SOUTHEAST OF MONTICELLO 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. DISCUSSION...THUNDERSTORMS ARE INCREASING IN AREA OF LARGE SCALE ASCENT AND RETURN OF A VERY MOIST UNSTABLE GULF AIR MASS. DEEP LAYER SHEAR IS FAVORABLE FOR SUPERCELLS AND BY EARLY AFTERNOON TORNADIC SUPERCELLS WILL BE LIKELY AS STORMS CONTINUE MOVE/DEVELOP E/NE ACROSS THE WATCH AREA. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 24030. ...HALES Hazard Tornadoes EF2+ Tornadoes Likelihood Moderate Moderate Severe Wind 65 kt+ Wind Moderate Moderate Severe Hail 2"+ Hail Moderate Moderate Note: Click for Watch Status Reports. WOUS64 KWNS 231449 WOU9 BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH OUTLINE UPDATE FOR WT 79 NWS STORM PREDICTION CENTER NORMAN OK 955 AM CDT FRI APR 23 2010 TORNADO WATCH 79 IS IN EFFECT UNTIL 500 PM CDT FOR THE FOLLOWING LOCATIONS ARC003-011-013-017-019-025-027-039-041-043-057-061-073-079-081- 091-099-103-109-133-139-232200- /O.NEW.KWNS.TO.A.0079.100423T1455Z-100423T2200Z/ AR . ARKANSAS COUNTIES INCLUDED ARE ASHLEY BRADLEY CALHOUN CHICOT CLARK CLEVELAND COLUMBIA DALLAS DESHA DREW HEMPSTEAD HOWARD LAFAYETTE LINCOLN LITTLE RIVER MILLER NEVADA OUACHITA PIKE SEVIER UNION LAC013-015-017-021-025-027-029-031-035-041-043-049-059-061-065- 067-069-073-081-083-085-107-111-119-123-127-232200- /O.NEW.KWNS.TO.A.0079.100423T1455Z-100423T2200Z/ LA . LOUISIANA PARISHES INCLUDED ARE BIENVILLE BOSSIER CADDO CALDWELL CATAHOULA CLAIBORNE CONCORDIA DE SOTO EAST CARROLL FRANKLIN GRANT JACKSON LA SALLE LINCOLN MADISON MOREHOUSE NATCHITOCHES OUACHITA RED RIVER RICHLAND SABINE TENSAS UNION WEBSTER WEST CARROLL WINN TXC037-063-067-159-183-203-315-343-365-387-401-419-423-449-459- 499-232200- /O.NEW.KWNS.TO.A.0079.100423T1455Z-100423T2200Z/ TX . TEXAS COUNTIES INCLUDED ARE BOWIE CAMP CASS FRANKLIN GREGG HARRISON MARION MORRIS PANOLA RED RIVER RUSK SHELBY SMITH TITUS UPSHUR WOOD ATTN...WFO...JAN...SHV...LZK... Hazard Tornadoes EF2+ Tornadoes Likelihood Moderate Moderate Severe Wind 65 kt+ Wind Moderate Moderate Severe Hail 2"+ Hail Moderate Moderate Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas. SAW9 WW 79 TORNADO AR LA TX 231455Z - 232200Z AXIS..90 STATUTE MILES NORTH AND SOUTH OF LINE.. 35NW GGG/LONGVIEW TX/ - 65SE LLQ/MONTICELLO AR/ ..AVIATION COORDS.. 80NM N/S /28NW GGG - 45SW SQS/ HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS. MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24030. LAT...LON 34049515 34279095 31679095 31439515 THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS FOR WOU9. Watch 79 Status Report Message has not been issued yet.  MESOSCALE DISCUSSION 0347 NWS STORM PREDICTION CENTER NORMAN OK 0828 AM CDT FRI APR 23 2010 AREAS AFFECTED...NERN TX...NRN LA...SRN AR CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY VALID 231328Z - 231430Z SCATTERED TSTMS HAVE RECENTLY DEVELOPED ACROSS NERN TX. INCREASING DESTABILIZATION AND STRONG DEEP-LAYER SHEAR WILL SUPPORT A THREAT FOR SUPERCELLS...PRODUCING ALL MODES OF SEVERE WEATHER. A TORNADO WATCH APPEARS PROBABLE WITHIN THE NEXT 1-2 HOURS. TSTM INITIATION HAS RECENTLY COMMENCED WITHIN A ROBUST LOW-LEVEL WARM THETA-E ADVECTION ACROSS NERN TX. 12Z SHV AND FWD RAOBS DEPICT LITTLE IF ANY CAPPING WITH MUCAPE AROUND 1200 J/KG. GRADUAL DESTABILIZATION WITHIN STRONG SWLY LOW-LEVEL FLOW SHOULD RESULT IN AN INCREASING THREAT FOR SUPERCELLS PRODUCING LARGE HAIL AND LOCALLY DAMAGING WINDS. ALTHOUGH THE TORNADIC POTENTIAL MAY BE MARGINAL IN THE NEAR-TERM GIVEN ONGOING DEVELOPMENT N OF SECONDARY BAROCLINIC ZONE OVER SERN TX/SRN LA...OVERALL THREAT SHOULD INCREASE THROUGHOUT THE DAY AND WILL NECESSITATE A WW ISSUANCE. ..GRAMS.. 04/23/2010  |
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In this thread:
Setting up for some weather this weekend......... - Tiny, 4/22/2010, 12:02 pm
- Re: Setting up for some weather this weekend......... - StaceyinAlabama, 4/23/2010, 9:13 am
- Possible Significant Tornado Risk along MS River this Evening - JAC, 4/23/2010, 7:38 am
- Moderate Theta-E Feed Continuing - JAC, 4/23/2010, 5:46 pm
- Lots of clouds keeping a lid on the cap, 988mb surface low - JAC, 4/23/2010, 10:59 am
- Missouri to Louisiana under the gun Friday - JAC, 4/22/2010, 3:28 pm
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