Alert archive / Alabama / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 7, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Mar 29, 1991, 5:09 AM CST for Clarke County, Alabama. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Mar 29, 1991, 5:09 AM CST (11:09 UTC)
- Expired
- Mar 29, 1991, 5:45 AM CST
- In force
- 36 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Clarke County, AL
The nearest sounding before it
Centreville/Bibb, AL (KCKL), launched 00:00Z, 11.2 hours before the alert went out and 148 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
- 93 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 369 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 291112 SVRMOB ALC025-291145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 509 AM CST FRI MAR 29 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 AM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...NORTHERN CLARKE COUNTY AT 510 AM CST RADAR IDICATED A SEVERE THUNDERSTORM OVER NORTHERN CLARKE COUNTY ALABAMA NEAR THOMASVILLE. THE STORM WAS MOVING TO THE NORTHEAST AT 40 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, Mar 29, 1:10 AM CST, 3 hours 59 minutes before
MSZ014-290900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 105 AM CST FRI MAR 29 1991 ...TORNADO WATCH NUMBER 83 IN EFFECT UNTIL 400 AM CST FOR PERSONS IN GREENE...PEARL RIVER...AND PERRY COUNTIES IN SOUTHEAST MISSISSIPPI... NO SEVERE WEATHER HAS OCCURRED IN SOUTHEAST MISSISSIPPI. AT 100 AM MOBILE RADAR INDICATED ONLY WIDELY SCATTERED SHOWERS IN SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA. OTHER NATIONAL WEATHER SERVICE RAD"ARS INDICATED SEVERE THUNDERSTORMS IN CENTRAL MISSISSIPPI...AND VERY STRONG THUNDERSTORMS EXTENDED FROM NEAR NATCHEZ TO THE TEXAS COAST. THIS SYSTEM MAY MOVE INTO SOUTHEAST MISSISSIPPI BEFORE DAYBREAK.
Special weather statement, Mar 29, 3:22 AM CST, 1 hour 47 minutes before
MSZ014-291100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 315 AM CST FRI MAR 29 1991 ...TORNADO WATCH NUMBER 83 IN EFFECT UNTIL 400 AM CST FOR PERSONS IN GREENE...PEARL RIVER...AND PERRY COUNTIES IN SOUTHEAST MISSISSIPPI... NO SEVERE WEATHER HAS OCCURRED IN SOUTHEAST MISSISSIPPI. AT 300 AM MOBILE RADAR INDICATED SCATTERED SHOWERS IN SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA. THE HEAVIEST SHOWER WAS LOCATED OVER THE NORTHEAST CORNER OF GREENE COUNTY MISSISSIPPI. THE SHOWERS WERE INCREASING IN COVERAGE AND STRENGTH WHILE MOVING TO THE NORTHEAST AT 40 MPH. OTHER NATIONAL WEATHER SERVICE RADARS INDICATED VERY STRONG THUNDERSTORMS EXTENDED FROM NEAR TUSCALOOSA ALABAMA TO NEAR LAKE CHARLES LOUISIANA.
Special weather statement, Mar 29, 3:59 AM CST, 1 hour 10 minutes before
MSZ014-013-291200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 357 AM CST FRI MAR 29 1991 ...TORNADO WATCH NUMBER 85 IN EFFECT UNTIL 900AM CST FOR ALL COUNTIES IN SOUTHEAST MISSISSIPPI AND THE ADJACENT COASTAL WATERS... NO SEVERE WEATHER HAS OCCURED IN SOUTHEAST MISSISSIPPI. AT 345 AM MOBILE RADAR INDICATED SCATTERED SHOWERS OVER SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA. THE STRONGEST SHOWERS WERE LOCATED OVER GREENE COUNTY MISSISSIPPI. THE SHOWERS WERE INCREASING IN BOTH STRENGTH AND COVERAGE WHILE MOVING TO THE NORTHEAST AT 40 MPH. OTHER NATIONAL WEATHER SERVICE RADARS INDICATED VERY STRONG THUNDERSTORMS EXTENDING FROM NEAR TUSCALOOSA ALABAMA TO NEAR LAKE. CHARLES LOUISIANA
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 7:09 AM CST | Severe Thunderstorm Warning | MOB | Dallas | 51 min |
| Mar 29, 7:09 AM CST | Severe Thunderstorm Warning | MOB | Elmore | 51 min |
| Mar 29, 9:00 AM CST | Severe Thunderstorm Warning | MOB | Lee, Macon | 45 min |
| Mar 29, 11:26 AM CST | Severe Thunderstorm Warning | MOB | Crenshaw | 34 min |
| Mar 29, 11:49 AM CST | Tornado Warning | MOB | Bullock, Montgomery | 26 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1991Every severe thunderstorm warning in 1991
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.