Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 101, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 12, 1990, 12:25 PM CDT for Madison Parish, Tensas Parish, Louisiana. It was in force for 65 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
- May 12, 1990, 12:25 PM CDT (17:25 UTC)
- Expired
- May 12, 1990, 1:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Madison Parish, LA, Tensas Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 1:25 PM CDT | Thunderstorm Wind 0 | Madison, LA | |
| May 12, 1:25 PM CDT | Thunderstorm Wind 0 | Tensas, 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
Jackson, MS (KJAN), launched 12:00Z, 5.4 hours before the alert went out and 115 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
- 7 J/kg
- Mixed-layer CIN
- -159 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 121726 SVRSHV LAC065-107-121830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 1225 PM CDT SAT MAY 12 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 130 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHEAST LOUISIANA ...MADISON PARISH...TENSAS PARISH AT 1225 PM WEATHER SERVICERADAR IN SHREVEPORT SHOWED SEVERE THUNDERSTORMS ENTERING MADISON AND TENSAS PARISHES. WINDS GUSTED TO NEAR 40 MPH ALONG WITH HEAVY RAINFALL AT WINNSBORO LOUISIANA IN FRANKLIN PARISH. MOVEMENT WAS EAST NORTHEAST AT 40 TO 50 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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
Special weather statement, May 12, 7:19 AM CDT, 5 hours 6 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-121400- SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 710 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR SOUTHERN WINN PARISH HAS EXPIRED... AT 705 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS THAT EXTENDED IN A 65 MILE WIDE AREA OVER NORTHWEST LOUISIANA..NORTHEAST TEXAS AND EXTREME SOUTHWEST ARKANSAS. THIS AREA EXTENDED FROM HOPE ARKANSAS TO LONGVIEW TEXAS TO JUST WEST OF LUFKIN TEXAS. MOVEMENT WAS EAST AT ABOUT 50 MPH. ALSO ISOLATED SHOWERS AND THUNDERSTORMS WERE NOTED ACROSS CENTRAL LOUISIANA NEAR GEORGETOWN..MONTGOMERY AND MANY. MOVEMENT WAS TO THE EAST AT 25 MPH. . GUSTY WINDS...DANGEROUS LIGHTNING AND LOCALLY HEAVY RAINFALL CAN BE EXPECTED WITH THESE STORMS THIS MORNING. A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT FOR MUCH OF THE AREA U]NTIL 9 PM THIS MORNING.
Special weather statement, May 12, 7:20 AM CDT, 5 hours 5 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-121400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 710 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR SOUTHERN WINN PARISH HAS EXPIRED... AT 705 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS THAT EXTENDED IN A 65 MILE WIDE AREA OVER NORTHWEST LOUISIANA..NORTHEAST TEXAS AND EXTREME SOUTHWEST ARKANSAS. THIS AREA EXTENDED FROM HOPE ARKANSAS TO LONGVIEW TEXAS TO JUST WEST OF LUFKIN TEXAS. MOVEMENT WAS EAST AT ABOUT 50 MPH. ALSO ISOLATED SHOWERS AND THUNDERSTORMS WERE NOTED ACROSS CENTRAL LOUISIANA NEAR GEORGETOWN..MONTGOMERY AND MANY. MOVEMENT WAS TO THE EAST AT 25 MPH. . GUSTY WINDS...DANGEROUS LIGHTNING AND LOCALLY HEAVY RAINFALL CAN BE EXPECTED WITH THESE STORMS THIS MORNING. A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT FOR MUCH OF THE AREA `UNTIL 9 PM THIS MORNING.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 1:57 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 48 min |
| May 12, 2:29 AM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Webster | 61 min |
| May 12, 2:48 AM CDT | Tornado Warning | SHV | De Soto | 57 min |
| May 12, 5:13 AM CDT | Severe Thunderstorm Warning | SHV | Natchitoches | 62 min |
| May 12, 5:57 AM CDT | Severe Thunderstorm Warning | SHV | Winn | 63 min |
| May 12, 8:09 AM CDT | Severe Thunderstorm Warning | SHV | De Soto | 66 min |
| May 12, 8:49 AM CDT | Tornado Warning | SHV | Sabine | 56 min |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, Red River, Webster | 4 hr |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | De Soto, Natchitoches, Sabine | 4 hr |
| May 12, 9:42 AM CDT | Tornado Warning | SHV | Natchitoches | 48 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 60 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Ouachita | 60 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 59 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Franklin | 59 min |
| May 12, 12:41 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Red River | 94 min |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Webster | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | De Soto, Sabine | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Caddo | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Natchitoches, Red River | 4 hr |
| May 12, 1:50 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 55 min |
| May 12, 2:44 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 61 min |
| May 12, 3:08 PM CDT | Flash Flood Warning | SHV | Winn | 2 hr |
| May 12, 3:51 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Tensas | 69 min |
| May 12, 6:48 PM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 57 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990
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.