Alert archive / Alabama / Flash Flood Warnings in 1990

Flash Flood Warning 82, NWS Birmingham, AL

December 22, 1990Limestone County, Morgan County, Alabama

NWS Birmingham, AL issued this flash flood warning at Dec 22, 1990, 11:46 PM CST for Limestone County, Morgan County, Alabama. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Dec 22, 1990, 11:46 PM CST (05:46 UTC)
Expired
Dec 23, 1990, 3:45 AM CST
In force
4 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Limestone County, AL, Morgan County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 5.8 hours before the alert went out and 169 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 1990-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 1990-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
464 m above ground
0-6 km bulk shear
94 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
347 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KHSV 230547
FFWHSV
ALC083-103-230945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1146 PM CST SAT DEC 22 1990
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  345 AM CST
 
 
IN NORTH ALABAMA
 
   ...LIMESTONE COUNTY...MORGAN COUNTY
 
...FLASH FLOOD WARNING IN EFFECT FOR JACKSON COUNTY TIL 130 AM CST...
...FLASH FLOOD WARNING IN EFFECT FOR LAWRENCE COUNTY TIL 315 AM CST...
 
AT 1140 PM CST HUNTSVILLE RADAR SHOWED VERY HEAVY RAIN OCCURRING IN
SHOWERS AND THUNDERSHOWERS OVER LAWRENCE...MORGAN...LIMESTONE AND
MADISON COUNTIES OF NORTH ALABAMA.
 
MOVEMENT WAS NORTHEAST AT 35 MPH.
 
THIS PRECIPITATION WILL LIKELY PRODUCE AN INCH OR MORE OF RAIN.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING KALONG STREAMS OR CREEKS DURING THREATENING RAINS.

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, Dec 22, 5:59 PM CST, 5 hours 47 minutes before
ALZ004>009-011-013-230600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
600 PM CST SAT DEC 22 1990

 ...TORNADO WATCH FOR MUCH OF NORTH AND WEST ALABAMA HAS EXPIRED...
 ...FLASH FLOOD WATCH IN EFFECT FOR MOST OF NORTHERN...WESTERN AND
CENTRAL ALABAMA TONIGHT...

MODERATE RAIN WITH FEW HEAVY THUNDERSTORMS COVER A LARGE PORTION OF
NORTHERN...CENTRAL...AND WESTERN ALABAMA.  THE RAIN WILL PERSIST OVER
THE FLOOD WATCH AREA THROUGH THE EVENING.

WHILE THE RAIN CONTINUES...THE STRENGTH OF THE THUNDERSTORMS OVER THE
STATE HAVE WEAKENED.  WHILE NO PORTION OF ALABAMA REMAINS UNDER A
TORNADO WATCH...A FEW THUNDERSTORMS MAY STILL PRODUCE VERY HEAVY RAIN
AND STRONG GUSTY WINDS.

sALABAMIANS SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS
THROUGH THE EVENING HOURS.
Special weather statement, Dec 22, 7:45 PM CST, 4 hours 1 minute before
ALZ004>009-011-013-230245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
744 PM CST SAT DEC 22 1990

 ...FLASH FLOOD WATCH IN EFFECT FOR MOST OF NORTHERN...WESTERN AND
CENTRAL ALABAMA TONIGHT...
     ...STRONG THUNDERSTORMS ACROSS WEST CENTRAL ALABAMA...

AT 740PM...NATIONAL WEATHER SERVICE RADAR IN CENTREVILLE INDICATED
AN AREA OF SHOWERS AND THUNDERSTORMS ACROSS MUCH OF WEST AND CENTRAL
ALABAMA. THE STRONGEST STORM WAS MOVING ACROSS SOUTHERN PICKENS COUNTY
NEAR THE COMMUNITY OF ALICEVILLE. THIS STORM IS EXPECTED TO MOVE
JUST TO THE NORTH OF TUSCALOOSA WITHIN THE NEXT HOUR. OTHER STRONG
THUNDERSTORMS WERE IN THE BIRMINGHAM METROPOLITAN AREA IN JEFFERSON
COUNTY.  THESE S/TORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN AND
STRONG GUSTY WINDS. MOVEMENT WAS TO THE NORTHEAST AT ABOUT 40 MPH.
Special weather statement, Dec 22, 10:22 PM CST, 1 hour 24 minutes before
ALZ002>009-013-230700-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
10 PM CST SAT DEC 22 1990

...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE REMAINDER OF TONIGHT
FOR MOST OF NORTHERN AND WESTERN ALABAMA...

AT 955 PM WEATHER RADAR INDICATED A BROAD AREA OF SHOWERS AND
THUNDERSTORMS COVERING MUCH OF NORTHERN AND WESTERN ALABAMA.  THE
STRONGEST THUNDERSTORMS WERE OVER CULLMAN...WALKER AND FAYETTE COUNTIES.
THESE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 35 TO 40 MPH.

A COLD FRONT EXTENDING FROM NEAR HUNTSVILLE ACROSS WEST CENTRAL
ALABAMA INTO SOUTHERN MISSISSIPPI WILL CONTINUE TO BE THE FOCUS
FOR POSSIBLE HEAVY RAIN OVERNIGHT.  PERSONS IN THE WATCH AREA ARE
URGED TO MONITOR LOCAL WEATHER CONDITIONS VERY CAREFULLY OVERNIGHT.
DO NOT ATTEMPT TO CROSS ANY ROADS COVERED WITH WATER AND BE SURE
TO AVOID ANY AREAS EASILY PRONE TO FLOODING.

REMEMBER...A FLASH FLOOD WATCH MEANS CONDITIONS ARE FAVORABLE FOR
FLOODI)NG IN AND CLOSE TO THE WATCH AREA.

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 22, 7:34 PM CSTFlash Flood WarningBMXJackson6 hr
Dec 22, 10:15 PM CSTFlash Flood WarningBMXCullman, Walker, Winston4 hr
Dec 22, 10:15 PM CSTFlash Flood WarningBMXFayette, Lamar, Marion4 hr
Dec 23, 12:38 AM CSTFlash Flood WarningBMXLawrence, Limestone, Morgan4 hr
Dec 23, 12:38 AM CSTFlash Flood WarningBMXJackson, Madison4 hr
Dec 23, 1:50 AM CSTFlash Flood WarningBMXCullman, Marion, Walker, Winston5 hr
Dec 23, 1:50 AM CSTFlash Flood WarningBMXFayette, Lamar5 hr

Nearby

Flash Flood Warnings in Alabama, 1990Every flash flood warning in 1990

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.