Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 239, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Dec 20, 1990, 5:29 PM CST for Madison Parish, Louisiana. It was in force for 31 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
- Dec 20, 1990, 5:29 PM CST (23:29 UTC)
- Expired
- Dec 20, 1990, 6:00 PM CST
- In force
- 31 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County Madison 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 |
|---|---|---|---|
| Dec 20, 5:40 PM CST | Hail 1 | Madison, LA | |
| Dec 20, 5:40 PM CST | Thunderstorm Wind 0 | Madison, 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, 11.5 hours before the alert went out and 109 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 202329 SVRSHV LAC065-210000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 529 PM CST THU DEC 20 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHEAST LOUISIANA ...EASTERN MADISON PARISH THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF VICKSBURG MISSISSIPPI IN EASTERN MADISON PARISH LOUISIANA. THIS STORM IS MOVING NORTHEAST AT 35 MILES PER HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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, Dec 20, 4:42 PM CST, 47 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-202330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 440 PM CST TUE DEC 18 1990 ...SHOWERS AND THUNDERSTORMS MOVE INTO CENTRAL LOUISIANA... AT 435 PM CST...THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED THUNDERSTORMS PRODUCING HEAVY TO VERY HEAVY RAINFALL ACROSS NATCHITOCHES AND WINN PARISHES. THESE THUNDERSTORMS WERE LOCATED FROM WEST OF CYPRESS TO SOUTHEAST OF WINNFIELD. MOVEMENT WAS NORTHEAST AT 25 TO 30 MILES AN HOUR. ALONG WITH THE LOCALLY HEAVY RAINFALL...DANGEROUS LIGHTNING AND GUSTY WINDS CAN BE EXPECTED WITH THESE THUNDERSTORMS. ELSEWHERE...SHOWERS AND THUNDERSTORMS WERE SCATTERED FROM VILLE PLATE AND ALEXANDRIA LOUISIANA NORTHEASTWARD TO JACKSON AND YAZOO CITY MISSISSIPPI. OTHER ISOLATED SHOWERS WERE ALSO LOCATED IN SOUTHWEST ARKANSAS BETWEEN FOUKE AND EL DORADO. STAY TUNED TO TV...RADIO AND NOAA WEATHER| RADIO FOR THE LATEST IN WEATHER INFORMATION.
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.