Alert archive / Alabama / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 69, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at May 12, 1991, 7:19 PM CDT for Mobile County, Alabama. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- May 12, 1991, 7:19 PM CDT (00:19 UTC)
- Expired
- May 12, 1991, 8:15 PM CDT
- In force
- 56 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile County, AL
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 0.3 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
- 1236 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 89 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 130021 SVRMOB ALC097-130115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MOBILE AL 719 PM CDT SUN MAY 12 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...SOUTHERN MOBILE COUNTY AND MOBILE BAY... THE MOBILE RADAR INDICATED SEVERE THUNDERSTORMS OVER MOBILE MOVING TOWARD THE SOUTH AT 15 MPH. THE WARNING ISSUED EARLIER IS EXTENDED. AT 710 THE MOBILE COUNTY SHERIFF REPORTED A WATERSPOUT IN MOBILE BAY JUST EAST OF THE THEODORE SHIP CHANNEL. THE WATERSPOUT IS MOVING TOWARD THE SOUTH. MARINE INTERESTS IN MOBILE BAY SHOULD SEEK SAFE HARBOR NOW. 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, May 12, 2:40 PM CDT, 4 hours 39 minutes before
ALZ013-015-122130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 240 PM CDT SUN MAY 12 1991 ...STRONG THUNDERSTORMS OVER THE NORTHEAST CORNER OF SOUTHWEST ALABAMA... AT 235 PM CDT MOBILE RADAR SHOWED AN AREA OF SHOWERS AND SCATTERED STRONG THUNDERSTORMS MOVING SOUTHEAST INTO CLARKE AND MONROE COUNTIES OF SOUTHWEST ALABAMA. THE STORMS WERE MOVING SOUTHEAST AT 20 MPH. THE STRONGEST STORMS WERE FROM EAST OF GROVE HILL OF CLARKE COUNTY TO BEATRICE OF MONROE COUNTY ALABAMA. RESIDENTS AND MOTORISTS CAN EXPECT HEAVY RAINFALL... CAUSING BRIEF STREET AND URBAN TYPE FLOODING... GUSTY WINDS... AND DANGEROUS LIGHTNING IN OR NEAR THE STRONGER STORMS AS THEY TRACK SOUTHEAST FOR THE NE XT COUPLE HOURS.
Special weather statement, May 12, 5:43 PM CDT, 1 hour 36 minutes before
ALZ016-MSZ014-122345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 541 PM CDT SUN MAY 12 1991 ...STRONG THUNDERSTORMS DRIFTING SOUTH ACROSS SOUTHWEST ALABAMA AND PORTIONS OF SOUTHEAST MISSISSIPPI... AT 535 PM THE MOBILE RADAR INDICATED A LINE OF STRONG THUNDERSTORMS ACROSS NORTHEAST GREENE COUNTY MISSISSIPPI SOUTHEAST INTO NORTHERN MOBILE AND BALDWIN COUNTIES OF ALABAMA. THE THUNDERSTORMS WERE MOVING TOWARD THE SOUTHEAST AT 30 MPH WHILE THE LINE IS SINKING SOUTHWARD ABOUT 5 MPH. THE THUNDERSTORMS ARE EXPECTED TO CONTINUE TO MOVE SOUTHWARD ACROSS GREENE INTO GEORGE COUNTIES OF MISSISSIPPI AND MOBILE AND BALDWIN COUNTIES OF ALABAMA. RESIDENTS CAN EXPECT DANGEROUS LIGHTNING...GUSTY WINDS AND POSSIBLY SOME HAIL. IN ADDITION...THE HEAVY RAINFALL WILL CAUSE FLOODING OF STREETS AND ROADS AND POSE A HAZARD TO MOTORISTS. IN AREAS SUBJECT TO FLOODING...RESIDENTS SHOULD REMAIN ALERT FOR RISING WATER AND BE PREPARED TO MOVE TO HIGHER GROUND IF NECESSARY. THE THUNDERSTORMS ARE EXPECTED TO DECREASE IN INTENSITY AFTER DARK.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 2:26 PM CDT | Severe Thunderstorm Warning | MOB | Montgomery | 64 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.