Alert archive / Alabama / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 13, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 8, 1991, 10:40 AM CDT for Mobile County, Alabama. It was in force for 60 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
- Apr 8, 1991, 10:40 AM CDT (15:40 UTC)
- Expired
- Apr 8, 1991, 11:40 AM CDT
- In force
- 60 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile County, AL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 10:50 AM CDT | Hail 0.75 | Mobile, AL |
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 12:00Z, 3.7 hours before the alert went out and 152 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
- 870 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 678 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 286 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 081541 SVRMOB ALC097-081640- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 1040 AM CDT MON APR 8 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1140 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...MOBILE COUNTY AT 1038 AM THE MOBILE RADAR INDICATED A SEVERE THUNDERSTORM JUST WEST OF THE MOBILE AIRPORT MOVING TOWARD THE NORTHEAST AT 25 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, Apr 8, 8:17 AM CDT, 2 hours 23 minutes before
ALZ013-015-016-MSZ014-013-081515- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 817 AM CDT MON APR 8 1991 ...THUNDERSTORMS MOVING ACROSS THE MISSISSIPPI AND ALABAMA COAST FOR THE REMAINDER OF THIS MORNING... THUNDERSTORMS DEVELOPING OVER THE MISSISSIPPI COASTAL COUNTIES THIS MORNING ARE EXPECTED TO MOVE NORTHEAST ACROSS PORTIONS OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA. THESE THUNDERSTORMS WILL PRODUCE DANGEROUS LIGHTNING...GUSTY WINDS... BRIEF HEAVY RAINFALL AND POSSIBLY SOME HAIL. COMMUTERS GOING TO WORK OR SCHOOL SHOULD PLAN EXTRA TIME TO ACCOUNT FOR REDUCED VISIBILITY AND WET ROADS.
Special weather statement, Apr 8, 10:31 AM CDT, 9 minutes before
ALZ013-015-016-MSZ014-013-081700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1030 AM CDT MON APR 8 1991 ...THUNDERSTORMS CONTINUING OVER JACKSON COUNTY MISSISSIPPI AND MOBILE AND BALDWIN COUNTIES OF ALABAMA... THE MOBILE RADAR AT 1025 AM INDICATED STRONG THUNDERSTORMS OVER EXTREME SOUTHEAST MISSISSIPPI AND THE TWO SOUTHWESTERN COUNTIES OF ALABAMA. THE THUNDERSTORMS WERE MOVING TOWARD THE NORTHEAST AT 25 MPH. THESE THUNDERSTORMS ARE PRODUCING DANGEROUS LIGHTNING...GUSTY WINDS OF 35 TO 45 MPH...HEAVY RAINFALL AND POSSIBLY SOME HAIL. A STRONG DOWNBURST WIND AT THE MOBILE AIRPORT RAISED THE TEMPERATURE 10 DEGREES IN 2 MINUTES BEFORE IF FELL BACK TO 67 DEGREES. RESIDENTS MAY NOTICE SOME RAPID TEMPERATURE FLUCTUATIONS. IF THE THUNDERSTORMS SHOW ADDITIONAL INCREASING INTENSITY...WARNINGS MAY BE ISSUED. YOU ARE ADVISED TO REMAIN ALERT.
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.