Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 73, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Dec 3, 1990, 5:18 AM CST for Washington Parish, Louisiana. It was in force for 57 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
- Dec 3, 1990, 5:18 AM CST (11:18 UTC)
- Expired
- Dec 3, 1990, 6:15 AM CST
- In force
- 57 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Washington 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 3, 5:30 AM CST | Thunderstorm Wind 0 | Washington, 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 11.3 hours before the alert went out and 75 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
- 20 J/kg
- Mixed-layer CIN
- -117 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 155 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 KNEW 031119 SVRNEW LAC117-031215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 518 AM CST MON DEC 3 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 AM CST FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...WASHINGTON PARISH AT 515 AM SLIDELL RADAR INDICATED A SEVERE THUNDERTORMS OVER WASHINGTON PARISH JUST EAST OF FRANKLINTON. THE THUNDERSTORM WAS MOVING NORTHEAST AT 20 MPH. 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 3, 1:44 AM CST, 3 hours 34 minutes before
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
Local storm report, Dec 3, 2:09 AM CST, 3 hours 9 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
205 AM CDT MON DEC 2 1990
1215AM CST SCHRIEVER...TERREBONE PARISH. TWO MOBILE HOMES DAMAGED BY
THUNDERSTORM WIND GUSTS. REPORT FROM TERREBONE PARISH
SHERIFFS OFFICE.Special weather statement, Dec 3, 2:21 AM CST, 2 hours 57 minutes before
LAZ006-008-009-030730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 220 AM CST MON DEC 3 1990 ...STRONG THUNDERSTORMS CONTINUE MOVING ACROSS MOST OF EAST CENTRAL LOUISIANA... RADAR SHOWED AN AREA OF SHOWERS AND STRONG THUNDERSTORMS EXTENDING FROM HOUMA...MORGAN CITY AND LAFAYETTE NORTHWARD ACROSS BATON ROUGE...DENHAM SPRINGS AND OPELOUSAS CONTINUING TO NEAR ALEXANDRIA...NATCHEZ MS AND MC COMB MS. THESE THUNDERSTORMS WERE MOVING NORTHEAST NEAR 20 MPH. AS THE STRONG THUNDERSTORMS MOVE THROUGH THE AREA...THEY WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL. THE HEAVY RAIN MAY CAUSE FLOODING OF STREETS...UNDERPASSES AND OTHER LOW LYING AREAS. MOTORISTS ARE URGED TO DRIVE WITH CAUTION AND NOT DRIVE INTO FLOODED ROADWAYS. THESE THUNDERSTORMS WILL LIKELY CONTINUE THROUGH THE MORNING RUSH HOUR TRAFFIC. . THE THUNDERSTORMS ARE CAUSED BY A STRONG COLD FRONT THAT IS ENTERING NORTHWEST LOUISIANA THIS MORNING AND WILL MOVE THROUGH THE BATON ROUGE AREA SOMETIME AFTER NOON TODAY.
Special weather statement, Dec 3, 2:45 AM CST, 2 hours 33 minutes before
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
Special weather statement, Dec 3, 3:26 AM CST, 1 hour 52 minutes before
LAZ006-008-009-030730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 330 AM CST MON DEC 3 1990 ...STRONG THUNDERSTORMS CONTINUE ACROSS EAST CENTRAL LOUISIANA... RADAR SHOWED AN AREA OF STRONG THUNDERSTORMS AND SHOWERS EXTENDING EAST AND SOUTHEAST OF A LINE FROM NEAR LAKE CHARLES NORTHEAST TO ALEXANDRIA CONTINUING TO NEAR VICKSBURG MS. THE THUNDERSTORMS WERE MOVING TOWARDS THE NORTHEAST AT 20 MPH. AS THE STRONG THUNDERSTORMS MOVE THROUGH THE AREA...THEY WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL. THE HEAVY RAIN MAY CAUSE FLOODING OF STREETS...UNDERPASSES AND OTHER LOW LYING AREAS. MOTORISTS ARE URGED TO DRIVE WITH CAUTION AND NOT DRIVE INTO FLOODED ROADWAYS. FLOODING IS OCCURRING ACROSS PARTS OF SOUTHEAST LOUISIANA AND MAY OCCUR FOR BRIEF PERIODS OVER PARTS OF EAST CENTRAL LOUISIANA. . THE THUNDERSTORMS ARE BEING PRODUCED BY A STRONG COLD FRONT THAT JUST MOVED THROUGH SHREVEPORT DURING THE PAST HOUR. THIS COLD FRONT WILL MOVE THROUGH THE BATON ROUGE AREA NEAR NOON TODAY ENDING MOST OF THE RAIN.
Special weather statement, Dec 3, 5:16 AM CST, 2 minutes before
LAZ006-008-009-030730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 515 AM CST MON DEC 3 1990 ...STRONG THUNDERSTORMS MOVING ACROSS PARTS OF EAST CENTRAL LOUISIANA... RADAR SHOWED A BAND OF STRONG THUNDERSTORMS EXTENDING FROM SOUTHWEST OF DONALDSONVILLE NORTHEAST TO NEAR AMITE. ALSO FROM THE COAST SOUTH OF LAFAYETTE NORTHEAST TO NORTH OF MC COMB MS. AND SOUTHWEST THROUGH NORTH- WEST OF ALEXANDRIA. THE AREA WAS MOVING SOUTHEAST AT 20 MPH. AS THE STRONG THUNDERSTORMS MOVE THROUGH THE AREA...THEY WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL. THE HEAVY RAIN MAY CAUSE FLOODING OF STREETS...UNDERPASSES AND OTHER LOW LYING AREAS. MOTORISTS ARE URGED TO DRIVE WITH CAUTION AND NOT DRIVE INTO FLOODED ROADWAYS. SOME FLOODING HAS OCCURRED OVER PARTS OF SOUTHEAST LOUISIANA AND COULD OCCUR FOR BRIEF PERIODS OF TIME OVER PARTS OF EAST CENTRAL LOUISIANA. . THE THUNDERSzTORMS ARE BEING PRODUCED BY A STRONG COLD FRONT THAT IS JUST NORTHWEST OF ALEXANDRIA AT THE PRESENT TIME. THIS COLD FRONT WILL MOVE THROUGH THE BATON ROUGE AREA BY NOON TODAY ENDING MOST OF THE RAIN.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 3, 2:22 AM CST | Flash Flood Warning | LIX | Lafourche, Terrebonne | 3 hr |
| Dec 3, 2:22 AM CST | Flash Flood Warning | LIX | Saint Charles | 3 hr |
| Dec 3, 4:24 AM CST | Severe Thunderstorm Warning | LIX | Orleans, Saint Tammany | 66 min |
| Dec 3, 6:32 AM CST | Tornado Warning | LIX | Lafourche, Saint Charles | 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.