Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 92, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 12, 1990, 5:57 AM CDT for Winn Parish, Louisiana. It was in force for 63 min. 1 report 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, 5:57 AM CDT (10:57 UTC)
- Expired
- May 12, 1990, 7:00 AM CDT
- In force
- 63 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County Winn 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, 6:25 AM CDT | Hail 1 | Winn, 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, 11.0 hours before the alert went out and 190 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
- 263 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 442 m²/s²
- 0-3 km storm-relative helicity
- 773 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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
Special weather statement, May 12, 1:21 AM CDT, 4 hours 36 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-120800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 110 AM CDT SAT MAY 12 1990 NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED TO DEVELOP AND RACE NORTHEAST ACROSS NORTHEAST TEXAS...SOUTHEAST OKLAHOMA... SOUTHWEST ARKANSAS AND NORTHWEST LOUISIANA. THE STORMS WERE MOVING EAST NORTHEAST NEAR 50 MILES AN HOUR AND WERE PRODUCING BRIEF STRONG WIND GUSTS AND HEAVY RAINFALL NEAR ONE INCH. THE AREA OF SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED NORTHWEST OF A LINE FROM NEAR PINE BLUFF ARKANSAS TO NEAR FARMERVILLE LOUISIANA TO CAMPTI LOUISIANA TO SOUTHWEST OF LUFKIN TEXAS. WITHIN THIS AREA A 15 MILE BAND OF THUNDERSTORMS THAT WERE PRODUCING ONE TO TWO INCH RAINS AND STREET AND UNDERPASS FLOODING AS WELL AS GUSTY WINDS WERE NOTED FROM NEAR STAMPS ARKANSAS TO JEFFERSON TEXAS TO HENDERSON TEXAS. . ANOTHER 15 MILE WIDE BAND OF THUNDERSTORMS EXTENDED FROM NEAR HALL SUMMIT LOUISIANA TO NEAR CENTER TEXAS. THESE STORMS WERE LIKELY PRODUCING RAINFALL AMOUNTS NEAR ONE INCH. THE LOCALIZED HEAVY RAINFALL AMOUNTS WILL CONTINUE TO OCCUR OVERNIGHT. ALL MAJOR STREAMS ARE IN FLOOD...ALL CREEKS AND BAYOUS ARE IN BACKWATER SO ADDITIONAL LOW AREA FLOODING WILL DEVELOP. THE SHOWERS AND THUNDERSTORMS WILL DISRUPT FLOOD FIGHT ACTIVITIES IN THE RED RIVER VALLEY OF SOUTHWEST ARKANSAS AND THE ADJACENT AREAS OF NORTHEAST TEXAS. THE LEVEE SYSTEMS WERE BEING TAXED BY THE CREST OF NEAR 32 FEET AT INDEX AND 32.4 AT FULTON AND DOWNSTREAM TO GARLAND CITY. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND AFFECT THE AREA TONIGHT AND SATURDAY. THE ADDITIONAL WATER WILL CAUSE MINOR 7INCREASES IN THE CREST STAGES EXPECTED ON AREA RIVERS AND STREAMS OR AT LEAST PROLONG THE HIGH WATER SITUATION.
Special weather statement, May 12, 3:10 AM CDT, 2 hours 47 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-120930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 305 AM CDT SAT MAY 12 1990 ...A TORNADO WARNING REMAINED IN EFFECT FOR DE SOTO PARISH UNTIL 345 AM..A SEVERE THUNDERSTORM WARNING REMAINED IN EFFECT FOR CLAIBORNE PARISH UNTIL 330 AM..THE WARNING IS NO LONGER IN EFFECT FOR WEBSTER PARISH OR COLUMBIA COUNTY... A SEVERE THUNDERSTORM WATCH WAS IN EFFECT FOR PART OF NORTHEAST TEXAS AND THE NORTHERN HALF OF LOUISIANA UNTIL 1000 AM. AT 300 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A POSSIBLE TORNADO NORTH OF LOGANSPORT LOUISIANA. MOVEMENT WAS EAST NORTHEAST NEAR 40 MPH. ALSO A 15 MILE WIDE BAND OF THUNDERSTORMS WAS NOTED FORM SOUTH OF EL DORADO ARKANSAS TO ARCADIA LOUISIANA. MOVEMENT WAS NORTHEAST NEAR 60 MPH. . MEROUS SHOWERS AND THUNDERSTORMS EXTENDED WEST OF A LINE FROM NEAR PINE BLUFF ARKANSAS TO MARION LOUISIANA TO NATCHITOCHES LOUISIANA TO SOUTHWEST OF LUFKIN TEXAS. THE TRAILING EDGE OF THE RAIN WAS NOTED FROM LEWISVILLE ARKANSAS TO MARSHALL TEXAS. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD ACROSS THE WATCH AREA THROUGH THE NIGHTTIME HOURS. ALONG WITH THE SEVERE STORMS...HEAVY RAINS OF ONE TO TWO INCHES WILL OCCUR AND CAUSE LOW AREA AND STREET FLOODING.
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, 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, 12:25 PM CDT | Severe Thunderstorm Warning | SHV | Madison, Tensas | 65 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 |
| May 12, 2:06 AM CDT | Severe Thunderstorm Warning | SHV | Panola | 54 min |
| May 12, 2:20 AM CDT | Tornado Warning | SHV | Panola | 25 min |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Gregg, Harrison, Marion, Panola, Rusk | 4 hr |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Shelby | 4 hr |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Panola, Rusk | 60 min |
| May 12, 11:33 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 57 min |
| May 12, 1:09 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 66 min |
| May 12, 5:09 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Harrison, Rusk | 66 min |
| May 12, 6:12 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola, Rusk | 63 min |
| May 12, 6:36 PM CDT | Flash Flood Warning | SHV | Panola, Rusk, Shelby | 3 hr |
| May 12, 1:32 PM CDT | Severe Thunderstorm Warning | SHV | Columbia | 58 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.