Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 440, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Aug 11, 2008, 5:00 PM CDT for 4 parishes in Louisiana. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 11, 2008, 5:00 PM CDT (22:00 UTC)
- Expired
- Aug 11, 2008, 6:00 PM CDT
- In force
- 60 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Bienville Parish, LA, Jackson Parish, LA, Natchitoches Parish, LA, Winn Parish, LA
The radar
The Shreveport radar (KSHV), 103 km from the middle of the area, began a volume at 22:04 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.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 10.0 hours before the alert went out and 97 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
- 1319 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, 3:34 PM CDT, 1 hour 26 minutes earlier.
Area forecast discussion, Aug 11, 3:34 PM CDT, 1 hour 26 minutes before
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</html>Hazardous weather outlook, Aug 11, 2:10 PM CDT, 2 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 210 PM CDT MON AUG 11 2008 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- 210 PM CDT MON AUG 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA... NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... HEAVY RAINFALL CONTINUED TO FALL ACROSS SOUTHEAST OKLAHOMA... SOUTHWEST ARKANSAS...AND NORTH CENTRAL LOUISIANA THIS AFTERNOON. TWO TO FIVE INCHES OF RAIN FELL THIS MORNING ACROSS THESE AREAS...WITH AN ADDITIONAL ONE TO THREE INCHES EXPECTED THIS AFTERNOON. PONDING OF WATER ON ROAD SURFACES...ESPECIALLY THOSE IN LOW LYING AREAS...COULD CAUSE HYDROPLANING. ADDITIONAL HEAVY RAINFALL WILL DEVELOP TONIGHT OVER NORTHEAST TEXAS AND SOUTHEAST OKLAHOMA...AND SPREAD OVER MUCH OF THE REGION TONIGHT AND TUESDAY MORNING. ADDITIONAL RAINFALL AMOUNTS OF TWO TO FOUR INCHES...WITH ISOLATED AMOUNTS POSSIBLY EXCEEDING SIX INCHES...IS LIKELY ACROSS MUCH OF THE AREA. WITH GROUNDS ALREADY AT OR NEAR SATURATION...INCREASED RUNOFF WILL LEAD TO FLASH FLOODING LATE TONIGHT AND EARLY TUESDAY MORNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... MORE HEAVY RAINFALL IS EXPECTED ACROSS THE FOUR STATE REGION ON TUESDAY...AS A SERIES OF UPPER LEVEL DISTURBANCES MOVE THROUGH THE AREA. SATURATED SOILS FROM TODAYS RAINS MAY INTRODUCE NEW AREAS TO THE FLASH FLOODING THREAT...ESPECIALLY OVER EAST TEXAS AND NORTH LOUISIANA. THE RAIN WILL EXIT FROM NORTHWEST TO SOUTHEAST TUESDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER...HAM RADIO OPERATOR....AND EMERGENCY MANAGEMENT ACTIVATION MAY BE NEEDED THIS AFTERNOON...BUT WILL LIKELY BE NEEDED LATE TONIGHT. 12/15
In the hours before
Local storm report, Aug 11, 11:01 AM CDT, 5 hours 59 minutes before
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</html>Local storm report, Aug 11, 11:50 AM CDT, 5 hours 10 minutes before
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</html>Special weather statement, Aug 11, 1:56 PM CDT, 3 hours 4 minutes before
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</html>Special weather statement, Aug 11, 2:27 PM CDT, 2 hours 33 minutes before
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</html>Special weather statement, Aug 11, 2:31 PM CDT, 2 hours 29 minutes before
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</html>Local storm report, Aug 11, 4:31 PM CDT, 29 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 10:00 AM CDT | Flash Flood Watch | SHV | Bowie, Camp, Cass, Franklin, Gregg, Harrison and 9 more | 29 hr |
| Aug 11, 12:22 PM CDT | Areal Flood Advisory | SHV | Bowie | 113 min |
| Aug 11, 2:27 PM CDT | Special Weather Statement | SHV | Camp, Wood | 63 min |
| Aug 11, 4:49 AM CDT | Flash Flood Warning | SHV | Caldwell, Ouachita | 3 hr |
| Aug 11, 6:42 AM CDT | Flash Flood Warning | SHV | Caldwell, Ouachita | 3 hr |
| Aug 11, 7:16 AM CDT | Flash Flood Warning | SHV | Claiborne | 3 hr |
| Aug 11, 7:36 AM CDT | Flash Flood Warning | SHV | Claiborne, Lincoln, Ouachita, Union | 3 hr |
| Aug 11, 9:44 AM CDT | Flash Flood Warning | SHV | Ouachita | 3 hr |
| Aug 11, 1:56 PM CDT | Special Weather Statement | SHV | Webster | 64 min |
| Aug 11, 2:31 PM CDT | Special Weather Statement | SHV | Claiborne | 59 min |
| Aug 11, 3:16 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Webster | 59 min |
| Aug 11, 4:03 PM CDT | Severe Thunderstorm Warning | SHV | Bienville | 57 min |
| Aug 11, 5:52 PM CDT | Special Weather Statement | SHV | Winn | 53 min |
| Aug 11, 6:43 PM CDT | Special Weather Statement | SHV | LaSalle | 62 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2008Every severe thunderstorm warning in 2008
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.