Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 77, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Dec 21, 1990, 3:56 PM CST for Concordia Parish, Louisiana. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Dec 21, 1990, 3:56 PM CST (21:56 UTC)
- Expired
- Dec 21, 1990, 4:30 PM CST
- In force
- 34 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Concordia Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.9 hours before the alert went out and 176 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
- 572 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBTR 212158 SVRBTR LAC029-212230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BATON ROUGE LA 356 PM CST FRI DEC 21 1990 THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL LOUISIANA ...NORTHERN CONCORDIA PARISH AT 355 PM RADAR SHOWED A SEVERE THUNDERSTORM 8 MILES WEST OF CLAYTON NEAR DUNBRATON. THE SEVERE THUNDERSTORM WAS MOVING TO THE NORTHEAST AT 30 MPH. DAMAGE HAS BEEN REPORTED FROM THIS STORM IN OTHER PARISHES DURING THE PAST 4 HOURS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DE2ADLY 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 21, 12:34 PM CST, 3 hours 22 minutes before
LAZ006-08-09-211930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1230 PM CST FRI DEC 21 1990 ...TORNADO WATCH IN EFFECT UNTIL 5 PM CST FOR AVOYELLES...CATAHOULA... CONCORDIA...POINT COUPEE AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... AT 1230 PM CST RADAR SHOWED STRONG THUNDERSTORMS NEAR LAKE CHARLES TO BETWEEN SIMMESPORT AND ALEXANDRIA TO SOUTH OF TALLULAH LOUISIANA. THESE THUNDERSTORMS WERE MOVING NORTH AT 40~ MPH. RAIN SHOWERS WERE DEVELOPING FROM BATON ROUGE TO MELVILLE LOUISIANA. PEOPLE IN THE MENTIONED PARISHES SHOULD BE ALERT AS THUNDERSTORMS WILL CONTINUE TO DEVELOPE THROUGHOUT THE AFTERNOON.
Special weather statement, Dec 21, 1:31 PM CST, 2 hours 25 minutes before
LAZ006-08-09-212030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 130 PM CST FRI DEC 21 1990 ...TORNADO WATCH IN EFFECT UNTIL 5 PM CST FOR AVOYELLES...CATAHOULA... CONCORDIA...POINT COUPEE AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... AT 130 PM CST RADAR SHOWED THUNDERSTORMS PRODUCING SEVERE WEATHER OVER SOUTHWEST LOUISIANA FROM NORTH OF LAKE CHARLES TO SOUTH OF ALEXNDRIA. THUNDERSTORMS AND RAIN CONTINUED NEAR FERRIDAY TO MONROE LOUISIANA. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH. PEOPLE IN THE MENTIONED PARISHES SHOULD BE ALERT AS THUNDERSTORMS CONTINUE TO DEVELOPE AND MOVE THROUGH EAST CENTRAL LOUISIANA.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 2:35 PM CST | Severe Thunderstorm Warning | LIX | Avoyelles | 60 min |
| Dec 21, 2:35 PM CST | Severe Thunderstorm Warning | LIX | Catahoula | 55 min |
| Dec 21, 3:20 PM CST | Severe Thunderstorm Warning | LIX | Catahoula | 55 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; the sounding from the Mesonet's radiosonde archive.