Alert archive / Alabama / Flash Flood Warnings in 1991
Flash Flood Warning 11, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at Aug 13, 1991, 4:26 PM CDT for Houston County, Alabama. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 13, 1991, 4:26 PM CDT (21:26 UTC)
- Expired
- Aug 13, 1991, 7:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Houston County, AL
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.4 hours before the alert went out and 127 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
- 1702 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 765 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 59 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 KMGM 132130 FFWMGM ALC069-140030- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MONTGOMERY AL 426 PM CDT TUE AUG 13 1991 THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH ALABAMA ...HOUSTON COUNTY NUMEROUS THUNDERSTORMS HAVE BEEN MOVING THROUGH A LINE WHICH IS VIRTUALLY STATIONARY JUST SOUTH OF DOTHAN. THIS HAS CAUSED FLOODING OF MANY COUNTY ROADS IN THE AREA ACCORDING TO THE HOUSTON COUNTY EMERGENCY MANAGEMENT AGENCY. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SdAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
What forecasters said that day
The local office's own words before this flash flood 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, Aug 13, 11:45 AM CDT, 4 hours 41 minutes before
ALZ016-MSZ013-131745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1143 AM CDT TUE AUG 13 1991 ...A FEW STRONG THUNDERSTORMS FOR THE MISSISSIPPI AND ALABAMA COASTAL COUNTIES FOR THE AFTERNOON... AT 1135 AM THE MOBILE RADAR INDICATED A FEW STRONG THUNDERSTORMS DEVELOPING OVER SOUTHERN MOBILE COUNTY ABOUT 10 TO 15 MILES SOUTH OF THE MOBILE AIRPORT. THE THUNDERSTORMS ARE DEVELOPING ALONG A SEA BREEZE FRONT WHICH IS ENHANCED BY THE PRESENCE OF A WEAK COLD FRONT IN THE AREA. FOR THIS REASON THE THUNDERSTORMS WILL BECOME QUITE STRONG THIS AFTERNOON WITH STRONG GUSTY WINDS...LOTS OF DANGEROUS LIGHTNING ...VERY HEAVY RAINFALL AND POSSIBLE HAIL. THE THUNDERSTORMS WILL EXTEND WESTWARD INTO THE MISSISSIPPI COASTAL COUNTIES AND EAST INTO BALDWIN COUNTY ALABAMA. LITTLE MOVEMENT WAS INDICATED BY RADAR BUT A SLIGHT NORTHEAST DRIFT IS LIKELY AS THE STORMS CONTINUE TO FORM. RESIDENTS IN THE MISSISSIPPI AND ALABAMA COASTlAL COUNTIES SHOULD BE ALERT FOR THE PRESENCE OF THESE THUNDERSTORMS AND PLAN TO BE INDOORS IF A STORM APPROACHES. IF THE STORMS DRIFT OVER MOBILE BAY OR THE IMMEDIATE COASTAL WATERS... MARINE WARNINGS WILL LIKELY BE ISSUED.
Nearby
Flash Flood Warnings in Alabama, 1991Every flash flood 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.