Alert archive / Alabama / Flash Flood Warnings in 1992
Flash Flood Warning 4, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Aug 21, 1992, 11:43 AM CDT for St. Clair County, Alabama. It was in force for 107 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1992, 11:43 AM CDT (16:43 UTC)
- Expired
- Aug 21, 1992, 1:30 PM CDT
- In force
- 107 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County St. Clair County, AL
The nearest sounding before it
Centreville/Bibb, AL (KCKL), launched 12:00Z, 4.7 hours before the alert went out and 122 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 79 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 KBHM 211644 FFWBHM ALC115-211830- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 1143 AM CDT FRI AUG 21 1992 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 130 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH ALABAMA ...ST.CLAIR COUNTY CONTINUOUS RAIN DURING THE MORNING HAS DROPPED NEARLY TWO INCHES OF RAIN OVER MUCH OF ST. CLAIR COUNTY. ADDITIONAL THUNDERSTORMS HAVE DEVELOPED ALONG THE ST. CLAIR AND TALLADEGA COUNTY LINE. THESE SLOW MOVING STORMS SHOULD MOVE NORTH INTO ST. CLAIR COUNTY DURING THE NEXT HOUR. THE ADDED RAIN SHOULD AGGRAVATE THE FLOODING POTENTIAL OVER THE COUNTY. 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 SAFELY. 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 21, 10:30 AM CDT, 1 hour 13 minutes before
ALZ004>009-011-211630 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 1030 AM CDT FRI AUG 21 1992 AT 1027 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED WIDESPREAD SHOWERS AND THUNDERSTORMS OVER CENTRAL AND NORTHERN ALABAMA. THE HEAVIEST RAIN WAS OCCURRING OVER JEFFERSON AND ST. CLAIR COUNTIES. THUNDERSTORMS OVER NORTHERN AND WESTERN PARTS OF THE BIRMINGHAM METRO AREA WERE PRODUCING SOME STREET FLOODING. MOVEMENT OF THE SHOWERS AND THUNDERSTORMS WAS NORTHEAST AT 15 MILES AN HOUR. HEAVY RAIN WILL CONTINUE DURING THE REMAINDER OF THE MORNING HOWEVER...THEY WILL SHIFT NORTHWARD INTO THE NORTHERN THIRD OF ALABAMA DURING THE AFTERNOON. IN ADDITION TO DROPPING HEAVY RAIN>...THESE STORMS ARE CAPABLE OF PRODUCING BRIEF GUSTY WIND AND LIGHTNING. STAY TUNED TO NOAA WEATHER RADIO OR THE MEDIA FOR FURTHER STATEMENTS.
Nearby
Flash Flood Warnings in Alabama, 1992Every flash flood warning in 1992
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.