Alert archive / Alabama / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 97, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Sep 18, 1991, 6:08 PM CDT for Mobile County, Alabama. It was in force for 37 min.
The area
The counties it named.
The facts
- Issued
- Sep 18, 1991, 6:08 PM CDT (23:08 UTC)
- Expired
- Sep 18, 1991, 6:45 PM CDT
- In force
- 37 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile County, AL
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 11.1 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
- 2338 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 182308 SVRMOB ALC097-182345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 608 PM CDT WED SEP 18 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...WESTERN MOBILE COUNTY AT 605 PM THE MOBILE RADAR INDICATED A SMALL BUT SEVERE THUNDERSTORM 5 MILES WEST OF THE MOBILE AIRPORT. THE STORM WAS DRIFTING TOWARD THE SOUTHWEST. LARGE HAIL IS INDICATED IN THIS THUNDERSTORM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTEQCTION 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, Sep 18, 3:30 PM CDT, 2 hours 38 minutes before
ALZ013-015-016-MSZ013-014-182230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 330 PM CDT WED SEP 18 1991 AT 325 PM CDT MOBILE RADAR SHOWED SHOWERS AND STRONG THUNDERSTORMS REMAINED SCATTERED OVER SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI. THE STRONGEST STORMS WERE ON THE EASTERN SHORE OF MOBILE BAY AND NORTH GEORGE COUNTY OF SOUTHEAST MISSISSIPPI. RESIDENTS IN OR NEAR THE STRONGER STORMS CAN EXPECT DANGEROUS LIGHTNING ... SMALL SIZE HAIL... AND HEAVY RAINFALL... CAUSING BRIEF FLOODING OF STREETS AND LOW LYING AREAS AS THESE STORMS TRACK TO THE SOUTHWEST. BOATERS IN OR NEAR MOBILE BAY SHOULD KEEP ALERT FOR RAPID CHANGE IN THE WEATHER AND TAKE NECESSARY FOR THEIR SAFETY UNTIL THE STORMS MOVE OUT OF THE AREA.
Special weather statement, Sep 18, 3:30 PM CDT, 2 hours 38 minutes before
ALZ013-015-016-MSZ013-014-182230- SPECIAL WEATHER STATEMENT...WORDING NATIONAL WEATHER SERVICE MOBILE AL 330 PM CDT WED SEP 18 1991 AT 325 PM CDT MOBILE RADAR SHOWED SHOWERS AND STRONG THUNDERSTORMS REMAINED SCATTERED OVER SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI. THE STRONGEST STORMS WERE ON THE EASTERN SHORE OF MOBILE BAY AND NORTH GEORGE COUNTY OF SOUTHEAST MISSISSIPPI. THE STORMS WERE MOVING SOUTHWEST AT LESS THAN 10 MPH. RESIDENTS IN OR NEAR THE STRONGER STORMS CAN EXPECT DANGEROUS LIGHTNING ... SMALL SIZE HAIL... AND HEAVY RAINFALL... CAUSING BRIEF FLOODING OF STREETS AND LOW LYING AREAS AS THESE STORMS TRACK TO THE SOUTHWEST. BOATERS IN OR NEAR MOBILE BAY SHOULD KEEP ALERT FOR RAPID CHANGE IN THE WEATHER AND TAKE NECESSARY ACTION FOR THEIR SAFETY UNTIL THE STORMS MOVE OUT OF THE AREA.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 4:22 PM CDT | Severe Thunderstorm Warning | MOB | Monroe | 53 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.