Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 7, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Feb 18, 1991, 9:08 PM CST for Bienville Parish, Claiborne Parish, Louisiana. It was in force for 82 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 18, 1991, 9:08 PM CST (03:08 UTC)
- Expired
- Feb 18, 1991, 10:30 PM CST
- In force
- 82 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Bienville Parish, LA, Claiborne Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 18, 9:20 PM CST | Hail 1.75 | Bienville, LA | |
| Feb 18, 9:55 PM CST | Thunderstorm Wind 0 | Claiborne, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 00:00Z, 3.1 hours before the alert went out and 150 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
- 766 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 566 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Local storm report, Feb 18, 5:27 PM CST, 3 hours 41 minutes before
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</html>Special weather statement, Feb 18, 5:49 PM CST, 3 hours 19 minutes before
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</html>Special weather statement, Feb 18, 6:36 PM CST, 2 hours 32 minutes before
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</html>Special weather statement, Feb 18, 7:33 PM CST, 1 hour 35 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001- 002-003-004-005-006-190400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 730 PM CST MON FEB 18 1991 ...THE TORNADO WATCH ISSUED EARLIER FOR SOUTHERN ARKANSAS HAS EXPIRED... SCATTERED SHOWERS AND A FEW THUNDERSTORMS LINGERED OVER PARTS OF NORTH LOUISIANA AND SOUTHERN ARKANSAS BUT CONTINUED TO DIMINISH IN INTENSITY. AT 725 PM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A 25 MILE WIDE AREA OF SHOWERS AND THUNDERSHOWERS THAT EXTENDED FROM NEAR HAMBURG ARKANSAS ACROSS RUSTON LOUISIANA TO NEAR CONVERSE LOUISIANA. ANOTHER 60 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS WAS LOCATED FROM NEAR WARREN ARKANSAS TO NEAR OKAY ARKANSAS. THE STORMS NEAR BLEVINS ARKANSAS WAS LIKELY PRODUCING STRONG GUSTY WINDS...BRIEF HEAVY RAINS AND FREQUENT LIGHTNING. MOVEMENT WAS EAST NORTHEAST NEAR 15 MPH. THE THREAT OF SEVERE WEATHER EXISTS ONCE AGAIN OVER THE AREA LATER TONIGHT AS ANOTHER UPPER LEVEL DISTURBENCE SPREADS EAST OVER THE REGION. SCATTERED THUNDERSTORMS WERE BEGINNING TO DEVELOP OVER NORTH CENTRAL TEXAS. THESE STORMS WILL FLARE UP ALONG A LINE FROM NEAR IDABEL OKLAHOMA TO PALESTINE ?TEXAS. SEVERE STORMS WILL AGAIN OVERSPREAD THE ARKLATEX LATE TONIGHT INTO THE WEE HOURS TUESDAY.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 1:33 AM CST | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 87 min |
| Feb 19, 1:45 AM CST | Flash Flood Warning | SHV | Bienville, Lincoln, Union | 4 hr |
| Feb 19, 1:45 AM CST | Flash Flood Warning | SHV | De Soto, Red River | 4 hr |
| Feb 19, 2:30 AM CST | Severe Thunderstorm Warning | SHV | De Soto | 60 min |
| Feb 19, 3:06 AM CST | Severe Thunderstorm Warning | SHV | Sabine | 69 min |
| Feb 19, 3:32 AM CST | Severe Thunderstorm Warning | SHV | De Soto, Natchitoches, Red River | 88 min |
| Feb 19, 4:09 AM CST | Severe Thunderstorm Warning | SHV | Winn | 81 min |
| Feb 19, 5:25 AM CST | Severe Thunderstorm Warning | SHV | Caldwell, Franklin, Richland | 65 min |
| Feb 19, 5:25 AM CST | Severe Thunderstorm Warning | SHV | West Carroll | 65 min |
| Feb 19, 6:03 AM CST | Flash Flood Warning | SHV | Winn | 3 hr |
| Feb 19, 6:03 AM CST | Flash Flood Warning | SHV | Bienville, Lincoln, Union | 3 hr |
| Feb 19, 6:03 AM CST | Flash Flood Warning | SHV | Caldwell, Franklin | 3 hr |
| Feb 18, 8:41 PM CST | Severe Thunderstorm Warning | SHV | Bowie, Cass | 79 min |
| Feb 18, 11:48 PM CST | Severe Thunderstorm Warning | SHV | Gregg | 87 min |
| Feb 19, 12:14 AM CST | Severe Thunderstorm Warning | SHV | Cass | 61 min |
| Feb 19, 12:43 AM CST | Severe Thunderstorm Warning | SHV | Harrison, Marion | 77 min |
| Feb 19, 12:43 AM CST | Severe Thunderstorm Warning | SHV | Lafayette, Miller | 77 min |
| Feb 19, 12:55 AM CST | Tornado Warning | SHV | Lafayette | 65 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.