Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 24, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 27, 1990, 4:18 PM CDT for Avoyelles Parish, Concordia Parish, Pointe Coupee Parish, Louisiana. It was in force for 42 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 27, 1990, 4:18 PM CDT (21:18 UTC)
- Expired
- May 27, 1990, 5:00 PM CDT
- In force
- 42 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Avoyelles Parish, LA, Concordia Parish, LA, Pointe Coupee 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 27, 4:42 PM CDT | Thunderstorm Wind 0 | Pointe Coupee, 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.3 hours before the alert went out and 175 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
- 2818 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 4.9
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 27, 2:45 PM CDT, 1 hour 33 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-272035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 235 PM CDT SUN MAY 27 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM CDT FOR THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA... ASSUMPTION..IBERIA..ST. MARY..UPPER ST. MARTIN...LOWER ST. MARTIN AND THE ADJOINING COASTAL WATERS OF IBERIA AND ST MARY PARISHES. SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED IN SOUTHWEST MISSISSIPPI AND ALSO CONTINUED TO DEVELOP IN CENTRAL LOUISIANA, THESE STORMS EXTENDED FROM NEAR ALEXANDRIA EAST ACROSS NATCHEZ AND MC COMB TO NEAR HATTIESBURG MISSISSIPPI. THESE STORMS HAVE INCREASED IN STRENGTH AND COVERAGE OVER THE LAST HOUR WHILE THE STRONGEST STORM IS LOCATED 5 MILES NORTHWEST OF MC COMB MOVEMENT WAS SOUTHEAST AT 30 MILES AN HOUR.
Special weather statement, May 27, 2:47 PM CDT, 1 hour 31 minutes before
LAZ006-008-009-272100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 245 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... RADAR SHOWED CLUSTERS OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM NORTHERN CATAHOULA PARISH...SOUTHWEST TO ALEXANDRIA..THEN SOUTH TO NEAR VILLE PLATTE. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL MOVE TO AVOYELLES...CONCORDIA AND ST. LANDRY PARISHES WITHIN THE HOUR. ELSEWHERE RADAR SHOWED NUMEROUS STRONG THUNDERSTORMS OVER NORTHEAST AND WEST CENTRAL LOUISIANA AND SOUTHWEST MISSISSIPPI. SCATTERED THUNDER- STORMS WERE OCCURRING BETWEEN BATON ROUGE AND OPELOUSAS. < REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS PRODUCING DAMAGING WINDS AND LARGE HAIL IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:27 PM CDT, 51 minutes before
LAZ006-008-009-272145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 245 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... MARBLE SIZE HAIL WAS REPORTED IN THE ENTERPRISE COMMUNITY IN EXTREME NORTHERN PART OF CATAHOULA PARISH AROUND 3PM BY THE SHERIFFS OFFICE. RADAR SHOWED A LARGE STRONG THUNDERSTORM WITH VERY HEAVY RAIN AND HAIL OVER POINTE COUPEE PARISH BETWEEN NEW ROADS AND LIVONIA. A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL EXTENDED FROM NEAR FERRIDAY IN CONCORDIA PARISH EXTENDING SOUTHWEST ACROSS ALEXANDRIA. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL CONTINUE MOVING THROUGH THE WATCH AREA THIS AFTERNOON AND PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:30 PM CDT, 48 minutes before
LAZ006-008-009-272145- SPECIAL WEATHER STATEMENT...CORRECTED ISSUE TIME NATIONAL WEATHER SERVICE BATON ROUGE LA 325 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... MARBLE SIZE HAIL WAS REPORTED IN THE ENTERPRISE COMMUNITY IN EXTREME NORTHERN PART OF CATAHOULA PARISH AROUND 3PM BY THE SHERIFFS OFFICE. RADAR SHOWED A LARGE STRONG THUNDERSTORM WITH VERY HEAVY RAIN AND HAIL OVER POINTE COUPEE PARISH BETWEEN NEW ROADS AND LIVONIA. A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL EXTENDED FROM NEAR FERRIDAY IN CONCORDIA PARISH EXTENDING SOUTHWEST ACROSS ALEXANDRIA. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL CONTINUE MOVING THROUGH THE WATCH AREA THIS AFTERNOON AND PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:48 PM CDT, 30 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-272135- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 335 PM CDT SUN MAY 27 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM CDT FOR ALL OF SOUTHEAST LOUISIANA... SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED IN SOUTHWEST MISSISSIPPI AND CENTRAL LOUISIANA, THESE STORMS WERE LOCATED FROM NEAR DERIDDER NORTHEAST ACROSS ALEXANDRIA TO NEAR VICKSBURG AND EAST ACROSS NATCHEZ AND MCCOMB TO NEAR HATTIESBURG MISSISSIPPI. THESE STORMS HAVE INCREASED IN STRENGTH AND COVERAGE OVER THE LAST HOUR WHILE THE STRONGEST STORM IS LOCATED 40 MILES SOUTHWEST OF MC COMB ELSHWHERE AN ISOLATED THUNDERSTORM DEVEL"OPED NEAR MOBILE ALABAMA MOVEMENT OF THESE STORMS IS SOUTHEAST 35 MILES AN HOUR.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 4:59 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 61 min |
| May 27, 5:12 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 63 min |
| May 27, 5:13 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena | 62 min |
| May 27, 5:27 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 63 min |
| May 27, 6:03 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 57 min |
| May 27, 6:08 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 67 min |
| May 27, 6:16 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 44 min |
| May 27, 6:19 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 26 min |
| May 27, 6:28 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 62 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.