Alert archive / Alabama / Flash Flood Warnings in 1990

Flash Flood Warning 58, NWS Birmingham, AL

May 20, 1990Marion County, Alabama

NWS Birmingham, AL issued this flash flood warning at May 20, 1990, 1:22 AM CDT for Marion County, Alabama. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 20, 1990, 1:22 AM CDT (06:22 UTC)
Expired
May 20, 1990, 3:30 AM CDT
In force
2 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

County Marion 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

Centreville/Bibb, AL (KCKL), launched 00:00Z, 6.4 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.

Skew-T log-pSkew-T log-p diagram, Centreville/Bibb, AL at 00:00Z on 1990-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 607 joules per kilogram.LCLLFCEL10008507005003002001001 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, Centreville/Bibb, AL at 00:00Z on 1990-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.193958Sfc1 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
607 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1174 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 200626
FFWBHM
ALC093-200830-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
122 AM CDT SUN MAY 20 1990
 
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  330 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH ALABAMA
 
   ...MARION COUNTY
 
HEAVY RAIN HAS FALLEN OVER MARION COUNTY DURING THE PAST SEVERAL HOURS
AND FLOODING HAS BEEN REPORTED IN THE HAMILTON AREA. STRONG
THUNDERSTORMS WILL CONTINUE TO PRODUCE VERY HEAVY RAINFALL OVER THE
COUNTY FOR AT LEAST THE NEXT HOUR AND ADDITIONAL FLASH FLOODING IS
LIKELY. SOME BUILDINGS WERE REPORTED TO HAVE WATER IN THEM IN THE CITY
OF HAMILTON AROUND 115 AM.
 D
 
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, May 19, 7:23 PM CDT, 5 hours 59 minutes before
ALZ010-014-017-200115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
718 PM CDT SAT MAY 19 1990

AT 707 PM CDT WEATHER RADAR AT MONTGOMERY SHOWED SCATTERED MASSES OF
THUNDERSTORMS WITHIN AREAS OF LIGHT RAIN OVER DALLAS...WILCOX...BUTLER
...LOWNDES AND SOUTH MONTGOMERY COUNTY. THE RAIN AND THUNDERSTORMS ARE
MOVING NORTHEAST AT ABOUT 25 MILES AN HOUR.

SOME LIGHT HAIL HAS BEEN REPORTED IN OTHER COUNTIES FROM THIS
AFTERNOON'S THUNDERSTORMS. RESIDENTS IN THE FOREMENTIONED AREAS
CAN EXPECT BRIEF HEAVY RAINS...DANGEROUS LIGHTNING AND SOME GUSTY
WINDS.

SNELL
Special weather statement, May 19, 8:12 PM CDT, 5 hours 10 minutes before
ALZ010-014-200215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
807 PM CDT SAT MAY 19 1990

THUNDERSTORMS AND LIGHT RAIN CONTINUED OVER SOUTH CENTRAL ALABAMA THIS
EVENING. AT 800 PM CDT WEATHER RADAR AT MONTGOMERY DETECTED A BAND OF
THUNDERSTORMS FROM NORTHWEST DALLAS COUNTY TO NORTHWEST LOWNDES
COUNTY. THE BAND OF THUNDERSTORMS WAS WITHIN AN AREA OF LIGHT RAIN
THAT STRETCHED FROM WETUMPKA TO BEYOND SELMA AND AS FAR SOUTH AS
HAYNEVILLE.

THE THUNDERSTORMS AND LIGHT RAIN WERE MOVING NORTHEAST AT ABOUT 25
MILES AN HOUR. RESIDENTS IN THE PATH OF THESE THUNDERSTORMS CAN EXPECT
BRIEF HEAVY RAINS DANGEROUS LIGHTNING AND SOME GUSTY WINDS.

SNELL
Special weather statement, May 19, 9:09 PM CDT, 4 hours 13 minutes before
ALZ010-014-200300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
905 PM CDT SAT MAY 19 1990

THUNDERSTORMS HAVE DIMINISHED IN SOUTH CENTRAL ALABAMA. AT 900 PM CDT
WEATHER RADAR AT MONTGOMERY SHOWED A LARGE MASS OF LIGHT RAIN OVER
NORTHEAST DALLAS COUNTY...AUTAUGA COUNTY AND WESTERN ELMORE COUNTY.

AT THAT TIME ONLY ONE THUNDERSTORM REMAINED AND IT WAS LOCATED JUST
EAST OF SELMA.  THE THUNDERSTORM WAS MOVING SLOWLY NORTCH AT ABOUT 10
MILES AN HOUR. THE RAIN WAS MOVING NORTHEAST AT ABOUT 25 MILES AN
HOUR.

THIS THUNDERSTORM WAS PRODUCING DANGEROUS LIGHTNING...VERY HEAVY RAIN
AND SOME GUSTY WINDS.

SNELL
Special weather statement, May 19, 10:59 PM CDT, 2 hours 23 minutes before
ALZ001>005-200700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1055 PM CDT SAT MAY 19 1990

...SHOWERS AND THUNDERSTORMS CONTINUE OVER NORTHERN ALABAMA...

AT 1040 PM CDT THE RADAR IN CENTERVILLE INDICATED A VERY HEAVY
THUNDERSTORM OVER SOUTHEASTERN CULLMAN COUNTY NEAR GARDEN CITY.
HEAVY RAIN AND FREQUENT LIGHTNING WERE BEING REPORTED IN THE CULLMAN
AREA.  THE STORM WAS MOVING NORTHEAST AROUND 30 MPH.  RESIDENTS
IN CULLMAN AND BLOUNT COUNTIES SHOULD REMAIN ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AS THIS STORM MAY PRODUCE STRONG
GUSTY WINDS...HEAVY RAIN AND POSSIBLY SOME SMALL HAIL.

ELSEWHERE IN NORTHERN ALABAMA...SHOWERS AND THUNDERSTORMS WERE
WIDESPREAD NORTH OF A LINE FROM MARION COUNTY TO DE KALB COUNTY.
THE STRONGEST STORMS WERE FROM SOUTHERN LAWRENCE COUNTY TO
JACKSON COUNTY.  THESE STORMS ARE CAPABLE OF PRODUCING STRONG
GUSTY WINDS...BRIEF PERIODS OF HEAVY RAIN AND FREQUENT DANGEROUS
LIGHTNING.  THE ACTIVITY WAS MOVING EAST NORTHEAST AT 30 MPH.
Special weather statement, May 20, 1:01 AM CDT, 21 minutes before
ALZ001>005-200800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1255 AM CDT SUN MAY 20 1990

...STRONG THUNDERSTORMS CONTINUE OVER NORTHERN ALABAMA...

AT 1250 AM CDT RADAR INDICATED A EAST-WEST BAND OF STRONG THUNDERSTORMS
WITH VERY HEAVY RAINFALL FROM HAMILTON IN MARION COUNTY EASTWARD ACROSS
NORTHERN LAMAR..WINSTON..WALKER..CULLMAN AND BLOUNT COUNTIES. THE BAND
OF STORMS HAD A SLIGHT SOUTHWRD DRIFT WHILE THE INDIVIDUAL THUNDERSTORMS
WERE MOVING EAST AT 30 MPH.

SMALL HAIL HAS BEEN REPORTED IN THE THUNDERSTORMS WHICH MOVED INTO
MARION COUNTY. GUSTY WINDS...INTENSE LIGHTNING AND HEAVY RAINFALL
CAN ALSO BE EXPECTED WITH THESE STORMS THE NEXT SEVERAL HOURS.
MOTORIST TRA*VELING ACROSS NORTH ALABAMA THIS MORNING SHOULD USE
EXTREME CAUTION SINCE ROADWAYS CAN BECOME QUICKLY COVERED WITH
SEVERAL INCHES OF WATER.

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 10:06 AM CDTSevere Thunderstorm WarningBMXFayette, Lamar69 min
May 20, 10:36 AM CDTSevere Thunderstorm WarningBMXWalker54 min
May 20, 11:03 AM CDTSevere Thunderstorm WarningBMXBlount, Cullman57 min
May 20, 11:08 AM CDTSevere Thunderstorm WarningBMXJefferson67 min
May 20, 11:12 AM CDTSevere Thunderstorm WarningBMXTuscaloosa48 min
May 20, 11:47 AM CDTSevere Thunderstorm WarningBMXSt. Clair, Shelby43 min
May 20, 11:47 AM CDTSevere Thunderstorm WarningBMXEtowah43 min
May 20, 11:55 AM CDTSevere Thunderstorm WarningBMXMarshall35 min
May 20, 12:15 PM CDTSevere Thunderstorm WarningBMXChilton45 min
May 20, 12:28 PM CDTSevere Thunderstorm WarningBMXCalhoun, Talladega62 min
May 20, 12:28 PM CDTSevere Thunderstorm WarningBMXCherokee, Etowah62 min
May 20, 12:45 PM CDTSevere Thunderstorm WarningBMXClay, Cleburne60 min
May 20, 1:07 PM CDTSevere Thunderstorm WarningBMXRandolph53 min
May 20, 3:29 PM CDTSevere Thunderstorm WarningBMXPickens, Tuscaloosa46 min
May 20, 4:07 PM CDTTornado WarningBMXTuscaloosa53 min
May 20, 4:57 PM CDTSevere Thunderstorm WarningBMXTuscaloosa63 min
May 20, 6:05 PM CDTSevere Thunderstorm WarningBMXBibb55 min

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.