Alert archive / Texas / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 313, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Aug 11, 2004, 4:33 PM CDT for Smith County, Texas. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 11, 2004, 4:33 PM CDT (21:33 UTC)
- Expired
- Aug 11, 2004, 5:00 PM CDT
- In force
- 27 min
- Issued by
- NWS Shreveport, LA
- Area
- Counties, with a storm outline in the text
County Smith County, TX
The radar
The Shreveport radar (KSHV), 127 km from the middle of the area, began a volume at 21:37 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.6 hours before the alert went out and 136 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 189 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1474 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KSHV 112133
SVRSHV
TXC423-112200-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
430 PM CDT WED AUG 11 2004
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SMITH COUNTY IN NORTHEAST TEXAS
* UNTIL 500 PM CDT
* AT 426 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
ARP...OR ABOUT 10 MILES EAST OF WHITEHOUSE...AND MOVING SOUTHEAST
AT 20 MPH.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE STORM IN A STRONG
BUILDING.
REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
SMITH COUNTY IN NORTHEAST TEXAS
UNTIL 500 PM CDT.
LAT...LON 3223 9531 3226 9527 3231 9525 3234 9522
3251 9509 3243 9500 3215 9499 3215 9516
$$What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 3:00 PM CDT, 1 hour 33 minutes earlier.
Area forecast discussion, Aug 11, 3:00 PM CDT, 1 hour 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 300 PM CDT WED AUG 11 2004 .DISCUSSION... COMPLICATED FORECAST IN THE SHORT TERM...AS INFLUENCE OF CONVECTION FROM OLD OK OUTFLOW ACROSS SE OK/EXTREME NE TX/SW AR WILL HAVE AN INFLUENCE ON HOW UNSTABLE THIS AREA CAN BECOME IN TIME OF THE LINE OF STORMS WHICH HAVE FIRED THIS AFTERNOON ALONG THE ACTUAL COLD FRONT...WHICH AS OF 19Z...EXTENDED FROM NEAR PBF...TO DEQ...TO PRX... SW TO GVT...TO JWY...TO SJT. AIR MASS HAS STABILIZED QUITE A BIT ACROSS SE OK AND SW AR...HOWEVER...CLEAR POCKET HAS DEVELOPED IN WAKE OF STORMS ACROSS EXTREME NE TX...WITH GOOD MIXING/HEATING ALLOWING CIN TO WEAKEN CONSIDERABLY THE LAST COUPLE OF HOURS. HENCE...FEEL THE THE GREATEST SVR WX THREAT WILL LIE MAINLY ALONG AND SOUTH OF I-30 ACROSS NE TX...PORTIONS OF SW AR MAY BE SPARED ROUND 2 OF SVR CONVECTION AS CLOUD COVER SHOULD LIMIT HEATING THROUGH SUNSET. SPECIAL 18Z RAOB FROM KSHV HAS INDICATED AIR MASS HAS DESTABILIZED QUITE A BIT SINCE 12Z...WITH STRONG ELEVATED CAPPING INVERSION NOTED FROM 18Z LCH RAOB...WHICH APPEARS TO BE INHIBITING DEVELOPMENT FARTHER SOUTH OVER N LA. STRONG SHORTWAVE DIVING SE ACROSS E OK/N TX SHOULD HELP ENHANCE CONVECTION...HAVE ALSO NOTICED SURFACE WINDS BEHIND OLD OUTFLOW SHIFT WINDS TO THE E/NE AHEAD OF THE ACTUAL FRONT...WHICH WOULD HELP TO ENHANCE LOW LEVEL CONVERGENCE AS THE META HAS DEPICTED IN ITS 12Z RUN. CLUSTER OF SVR CONVECTION NOTED B/W OUTFLOW/FRONTAL INTERSECTION ACROSS ELLIS/NAVARRO COUNTIES IN N TX...WHICH MAY BUILD E/SE ALONG THE BOUNDARY/INSTABILITY AXIS INTO LOWER E TX BY LATE AFTERNOON. WILL MENTION SVR W/HEAVY RAIN OVER ALL BUT THE FAR NW ZONES...ASSUMING AIR MASS WILL DESTABILIZE ENOUGH WHERE CONVECTION OCCURRED EARLIER OVER EXTREME NE TX/SW AR. DEEP LAYER SHEAR REMAINS WEAK /20-25 KTS/...THUS EVENING HEATING/MESOSCALE INTERACTIONS WILL BE KEY TO SUSTAINING SVR POSSIBILITY THROUGH EARLY EVENING. PW POOLING AHEAD OF THE FRONT IN EXCESS OF 2/WEAK SHEAR WILL ALLOW FOR GOOD DOWNPOURS TO OCCUR EVEN THROUGH THE OVERNIGHT HOURS...THUS SHOULD PRODUCE BENEFICIAL RAINFALL FOR MOST. STRONG VORT MAX OVER W MANITOBA WILL DIVE SOUTH TONIGHT INTO THE NORTHERN PLAINS...HELPING TO CARVE AN UNUSUALLY DEEP LONGWAVE TROUGH OVER THE E 2/3RDS OF THE COUNTRY...WHILE A STRONG UPPER RIDGE BUILDS OVER THE WEST. EVEN AS THE COLD FRONT DROPS SOUTH THROUGH THE AREA THIS EVENING...THE PRESSURE GRADIENT REMAINS RATHER TIGHT THURSDAY...BEFORE WEAKENING BY EARLY EVENING. MUCH COOLER/DRIER AIR WILL SURGE SOUTH AHEAD OF SURFACE RIDGING BUILDING SOUTH OVER THE SOUTHERN PLAINS...WITH VERY PLEASANT CONDITIONS...PERHAPS NEAR RECORD LOW TEMPS POSSIBLE BY LATE WEEK OVER SOME LOCATIONS. BONNIE HAS BEGUN TO LIFT NE ALONG THE LONGWAVE TROUGH AXIS...AND SHOULD STEER CLEAR OF THE LA COAST AND IMPACT THE WESTERN FLORIDA PANHANDLE COAST SOMETIME THURSDAY AFTERNOON/EVENING. THE SAME HOLDS TRUE FOR CHARLEY...AS HE TAKES A N/NE TURN TOWARDS THE WESTERN/SOUTHERN FLORIDA COAST DURING THE MID/LATE WEEKEND. WHILE MCS ACTIVITY IS POSSIBLE THURSDAY NIGHT/EARLY FRIDAY OVER E NM/W TX...NW FLOW SHOULD STEER SYSTEM SE WELL WEST OF THE AREA. HOWEVER...INSERTED SOME CLOUDS IN THE GRIDS GIVEN POSSIBILITY THAT SOME BLOWOFF COULD AFFECT THE AREA UNDER NW FLOW. LONGWAVE TROUGH WILL PERSIST FROM THE GREAT LAKES TO THE GULF COAST THROUGH LATE MONDAY...BEFORE THE RIDGE OUT WEST BEGINS TO BUILD EAST...ALLOWING TEMPS TO MODERATE TO MORE SEASONAL LEVELS. HOWEVER...REMAINDER OF THE EXTENDED LOOKS DRY FOR NOW. PRELIMS ARE NEXT... 15 && .PRELIMINARY POINT TEMPS/POPS... SHV 66 85 60 85 / 70 10 0 0 MLU 67 83 58 83 / 70 20 0 0 TXK 64 85 60 85 / 50 0 0 0 TYR 65 87 61 87 / 50 0 0 0 LFK 67 87 61 87 / 60 10 0 0 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. &&
Hazardous weather outlook, Aug 11, 12:00 PM CDT, 4 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1200 PM CDT WED AUG 11 2004 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-121100- ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE- CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD- HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION- MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA- PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX- SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR- WEBSTER-WINN-WOOD- 1200 PM CDT WED AUG 11 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OKLAHOMA...NORTHEAST TEXAS...SOUTHWEST ARKANSAS...NORTHWEST AND NORTH CENTRAL LOUISIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED ACROSS THE AREA THIS AFTERNOON AND EVENING...AS A COLD FRONT...AND A COUPLE OF OUTFLOW BOUNDARIES MERGE OVER SOUTHWEST ARKANSAS...NORTHEAST TEXAS...AND POSSIBLY NORTHWEST LOUISIANA THIS AFTERNOON. GIVEN AMPLE HEATING WHICH HAS TAKEN PLACE OVER THESE AREAS AHEAD OF THE THUNDERSTORMS...ADDITIONAL REDEVELOPMENT WILL LIKELY OCCUR...AS A STRONG UPPER LEVEL DISTURBANCE OVER CENTRAL OKLAHOMA...PUSHES SOUTHEAST INTO SOUTHWEST ARKANSAS AND NORTHEAST TEXAS THIS AFTERNOON. SOME OF THESE STORMS MAY BECOME SEVERE...WITH STRONG DAMAGING WINDS AND VERY HEAVY RAINFALL THE PRIMARY THREATS. THESE STORMS WILL THEN SHIFT SOUTHEAST ACROSS LOWER EAST TEXAS...MUCH OF NORTH LOUISIANA... AND EXTREME SOUTHERN ARKANSAS THIS EVENING...BEFORE EXITING THE REGION THURSDAY MORNING. THE SEVERE WEATHER THREAT WILL DIMINISH ACROSS SOUTH ARKANSAS AND NORTH LOUISIANA THIS EVENING WITH THE LOSS OF DAYTIME HEATING AND POSSIBLY STABILIZING RAIN COOLED AIR...BUT GIVEN THE INCREASING MOISTURE CONTENT OF THE ATMOSPHERE AHEAD OF THIS SYSTEM...LOCALLY HEAVY RAINFALL WILL REMAIN A THREAT OVERNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND STORM SPOTTERS...MAY BE NEEDED THIS AFTERNOON AND TONIGHT ACROSS MAINLY SOUTHWEST ARKANSAS...MUCH OF NORTHEAST TEXAS...AND NORTHERN LOUISIANA.
In the hours before
Local storm report, Aug 11, 12:08 PM CDT, 4 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1208 PM CDT WED AUG 11 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1158 AM HAIL 2 S LOCKESBURG 33.94N 94.17W
08/11/2004 0.75 INCH SEVIER AR CO-OP OBSERVER
STRONG WIND GUSTS ALSO REPORTED
&&
17Local storm report, Aug 11, 1:23 PM CDT, 3 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
123 PM CDT WED AUG 11 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1220 PM TSTM WND GST 4 W TOLLETTE 33.82N 93.97W
08/11/2004 60 MPH HOWARD AR EMERGENCY MNGR
1220 PM HAIL 4 W TOLLETTE 33.82N 93.97W
08/11/2004 1.75 INCH HOWARD AR EMERGENCY MNGR
1225 PM TSTM WND GST 4 S TOLLETTE 33.76N 93.90W
08/11/2004 60 MPH HOWARD AR EMERGENCY MNGR
IN THE TOWN OF SARATOGA.
1255 PM TSTM WND GST 5 S HOPE 33.60N 93.59W
08/11/2004 60 MPH HEMPSTEAD AR LAW ENFORCEMENT
&&
17Local storm report, Aug 11, 1:45 PM CDT, 2 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
145 PM CDT WED AUG 11 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1210 PM TSTM WND DMG 1 W ASHDOWN 33.67N 94.14W
08/11/2004 LITTLE RIVER AR LAW ENFORCEMENT
ONE TREE BLOWN DOWN ALONG HWY 32.
&&
17Local storm report, Aug 11, 4:10 PM CDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
410 PM CDT WED AUG 11 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0405 PM TSTM WND GST 3 N TYLER 32.37N 95.30W
08/11/2004 60 MPH SMITH TX TRAINED SPOTTER
OCCURRED ON HIGHWAY 69.
&&
17The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:36 PM CDT | Severe Thunderstorm Warning | SHV | Smith | 54 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2004Every severe thunderstorm warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.