Alert archive / Alabama / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 41, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 29, 1991, 1:28 PM CDT for Baldwin County, Mobile County, Alabama. It was in force for 62 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 29, 1991, 1:28 PM CDT (18:28 UTC)
- Expired
- Apr 29, 1991, 2:30 PM CDT
- In force
- 62 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
Counties Baldwin County, AL, Mobile County, AL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 29, 2:20 PM CDT | Thunderstorm Wind 0 | 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, 6.5 hours before the alert went out and 172 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
- 2664 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 12.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 291828 SVRMOB ALC003-097-291930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 128 PM CDT MON APR 29 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 230 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...NORTHERN BALDWIN COUNTY...MOBILE COUNTY AT 125 PM THE MOBILE RADAR SHOWED A LINE OF INTENSIFYING THUNDERSTORMS FROM JUST WEST OF MT VERNON TO JUST NORTHWEST OF THE MOBILE AIRPORT SOUTHWEST INTO MISSISSIPPI. THE LINE WAS MOVING TOWARD THE EAST AT 30 MPH. DAMAGING WINDS ARE LIKELY WITH THIS THUNDERSTORM LINE. 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.
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 29, 7:30 AM CDT, 5 hours 58 minutes before
MSZ014-013-291430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 730 AM CDT MON APR 29 1991 ...TORNADO WATCH NUMBER 235 IS IN EFFECT FOR THE FOLLOWING COUNTIES OF SOUTHEAST MISSISSIPPI... PEARL-RIVER... AND PERRY UNTIL 9 AM CDT... MOBILE AT 725 AM CDT SHOWED ONLY ISOLATED SHOWERS OVER SOUTHEAST MISSISSIPPI WITH THE STORM SYSTEM STILL NORTH AND NORTHWEST OF THE SOUTHEAST COUNTIES OF MISSISSIPPI. WEATHER PROBLEMS FOR THE PEARL-RIVER AND PERRY COUNTIES FOR THE NEXT COUPLE HOURS WILL ONLY BE IN THE FORM OF GUSTY WINDS RANGING FROM THE LOW TO UPPER 20S FROM THE SOUTH. THE AIRMASS OVER THE AREA REMAINS UNSTABLE WITH STRONG THUNDERSTORMS MOVING INTO THE AREA LATER THIS MORNING.
Special weather statement, Apr 29, 10:10 AM CDT, 3 hours 18 minutes before
ALZ013-015-016-MSZ014-013-291615- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1010 AM CDT MON APR 29 1991 ...A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA UNTIL 100 PM... ALL COUNTIES IN SOUTHEAST MISSISSIPPI AND IN SOUTHWEST ALABAMA ARE UNDER A TORNADO WATCH UNTIL EARLY AFTERNOON. WEATHER SERVICE RADARS INDICATED AT 1000 AM AN AREA OF THUNDERSTORMS WITH THE LEADING EDGE ALONG A THOMASVILLE TO MILLRY ALABAMA LINE SOUTHWEST TO NEAR RICHTON AND POPLARVILLE MISSISSIPPI. THE AREA WAS MOVING TOWARD THE EAST AT 10 MPH WHILE THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH. STRONG THUNDERSTORMS WERE INDICATED JUST WEST OF LAKE PONCHARTRAIN IN LOUISIANA. THE ATMOSPHERE REMAINS MOIST AND UNSTABLE THIS MORNING AND WILL BECOME MORE SO BY AFTERNOON. RESIDENTS IN SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA SHOULD REMAIN ALERT FOR THE POSSIBILITY OF SEVERE WEATHAER TODAY AND BE READY TO TAKE QUICK ACTION IF SEVERE WEATHER IS OBSERVED OR A WARNING IS ISSUED.
Local storm report, Apr 29, 11:47 AM CDT, 1 hour 41 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
1147 AM CDT MON APR 29 1991
TIME EVENT
1135 AM CLARKE COUNTY EMA DIRECTOR REPORTED A TORNADO CROSSED
US HIGHWAY 84 6 MILES WEST OF GROVE HILL.The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 11:13 AM CDT | Tornado Warning | MOB | Clarke | 32 min |
| Apr 29, 11:13 AM CDT | Tornado Warning | MOB | Lowndes | 62 min |
| Apr 29, 11:29 AM CDT | Severe Thunderstorm Warning | MOB | Autauga | 46 min |
| Apr 29, 11:51 AM CDT | Tornado Warning | MOB | Montgomery | 54 min |
| Apr 29, 12:49 PM CDT | Severe Thunderstorm Warning | MOB | Crenshaw | 56 min |
| Apr 29, 1:04 PM CDT | Severe Thunderstorm Warning | MOB | Butler | 56 min |
| Apr 29, 1:28 PM CDT | Severe Thunderstorm Warning | MOB | Macon | 62 min |
| Apr 29, 2:35 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 55 min |
| Apr 29, 3:19 PM CDT | Tornado Warning | MOB | Baldwin | 11 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.