Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 135, NWS Birmingham, AL

August 20, 1990Cullman County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 20, 1990, 2:05 PM CDT for Cullman County, Alabama. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Aug 20, 1990, 2:05 PM CDT (19:05 UTC)
Expired
Aug 20, 1990, 2:30 PM CDT
In force
25 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Cullman 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 12:00Z, 7.1 hours before the alert went out and 140 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 12:00Z on 1990-08-20Temperature 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, Centreville/Bibb, AL at 12:00Z on 1990-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939Sfc1 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
0 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Local storm report, Aug 20, 10:07 AM CDT, 3 hours 58 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MONTGOMERY AL
1000AM CDT MON AUG 20 1990

ADDITIONAL STORM REPORTS FOR STORMS OF AUGUST 19TH, 1990DAY'S STORM..
PIKE COUNTY...5 30PM CDT...TREES DOWN SEVERAL LOCATION  IN COUNTY...
CHICKEN HOUSE DAMAGED IN GOSHEN AND HENDERSON. CITY OF TROY WITHOUT
ELECTRICITY UNTIL 1030PM CDT. SMALL HAIL AND 3 INCHES OF RAIN.
WARNINGS IN EFFECT...NONE

CRENSHAW COUNTY...AROUND 5PM CDT...TREES AND POWER LINES DOWN AT
HIGHLAND HOME. REPORT FROM CO-OP OBSERVER.
WARNINGS IN EFFECT...NONE.
PETTIT
Local storm report, Aug 20, 12:13 PM CDT, 1 hour 52 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1215 PM CDT MON AUG 20 1990

...DELAYED STORM REPORTS FOR AUGUST 19 1990...

THESE EVENTS OCCURRED AROUND 5 PM AT UNION GROVE CLOSE TO THE JEMISON EXIT.
ON I 65.

    ...21 ACRES OF APPLE TREES WERE HEAVILY DAMAGED BY WINDS
       AS WELL AS ROOF BLOWN OFF NEARBY BARN.

    ...AT KOA CAMPGROUND...ROOF OFF ADMINSTRATION BUILDING
       RESULTING IN WATER DAMAGE TO OFFICES.

    ...SEVERAL LIGHT^ POLES AND SIGN WERE BLOWN DOWN.

    NO WARNINGS WERE IN EFFECT.

INFORMATION RELAYED TO STATE EMA BY CHILTON COUNTY EMERGENCY MANAGEMENT
OFFICAL
Special weather statement, Aug 20, 1:31 PM CDT, 34 minutes before
ALZ004>009-011-201930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
130 PM CDT MON AUG 20 1990

SHOWERS AND A FEW THUNDERSTORMS ARE FIRING UP QUICKLY ACROSS CENTRAL
ALABAMA THIS AFTERNOON.

AT 125 PM WEATHER SERVICE RADAR AT CENTREVILLE INDICATED A BROKEN LINE
OF SHOWERS AND STORMS WHICH EXTENDED FROM NEAR COLLINSVILLE IN DE KALB
COUNTY WESTWARD INTO NORTHERN CULLMAN...WINSTON AND MARION COUNTIES.
ANOTHER STRONG STORM WAS IN CLAY COUNTY ABOUT 10 MILES EAST OF ASHLAND.

MOVEMENT OF THE STORMS WERE SLOW AND ERRATIC AND BECAUSE OF THIS...VERY
HEAVY DOWNPOURS ARE POSSIBLE RESULTING IN LARGE AMOUNTS OF RAIN IN A
SHORT TIME.  IN ADDITION TO THE HEAVY RAIN...STRONG GUSTY WINDS AND
FREQUENT LIGHTNING CAN BE EXPECTED WITH THESE STORMS.

PERSONS SHOULD MOVE INSIDE A STRONG BUILDING SHOULD THREATENING WEATHER
APPROACH.  CONTINUE TO LISTEN TO NOAA WEATHER RADIO...LOCAL TV OR RADIO
FOR LATER WEATHER UPDATES AND STATEMENTS.
Special weather statement, Aug 20, 2:04 PM CDT, 1 minute before
ALZ004>009-011-202000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
202 PM CDT MON AUG 20 1990

STRONG THUNDERSTORMS WERE DEVELOPING IN NORTHERN ALABAMA THIS AFTERNOON.

AT 200 PM WEATHER SERVICE RADAR AT CENTREVILLE SHOWED NUMEROUS SHOWERS
AND THUNDERSTORMS ACROSS THE NORTH HALF OF ALABAMA.  SOME OF THE STORMS
WERE QUITE STRONG.  ONE OF THE STORMS...IN CULLMAN COUNTY...PRODUCED
MARBLE SIZED HAIL...VERY STRONG GUSTY WINDS AND HEAVY DOWNPOURS AROUND
140 PM.

LIGHT TO MODERATE SHOWERS WERE WIDELY SCATTERED OVER CENTRAL ALABAMA.
WITH HOT AFTERNOON TEMPERATURES...A FEW THESE SHOWERS MAY BUILD INTO
THUNDERSTORMS WITHIN A VERY SHORT TIME.  ALABAMIANS NEED TO KEEP THIS
IN MIND THIS AFTERNOON AND BE PREPARED TO MOVE TO SAFE SHELTER IF
THREATENING WEATHER APPROACHES YOU.

CONTINUE TO LISTEN TO NOAA WEATHER RADIO...OR LOCAL NEWS MEDIA FOR LATER
WEATHER UPDATES AND STATEMENTS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 2:35 PM CDTSevere Thunderstorm WarningBMXJefferson25 min
Aug 20, 2:54 PM CDTSevere Thunderstorm WarningBMXBlount, Jefferson36 min
Aug 20, 3:25 PM CDTSevere Thunderstorm WarningBMXJefferson35 min
Aug 20, 3:42 PM CDTSevere Thunderstorm WarningBMXWalker33 min
Aug 20, 4:11 PM CDTSevere Thunderstorm WarningBMXShelby34 min
Aug 20, 4:15 PM CDTSevere Thunderstorm WarningBMXFayette30 min
Aug 20, 4:34 PM CDTSevere Thunderstorm WarningBMXBibb26 min
Aug 20, 4:43 PM CDTSevere Thunderstorm WarningBMXFayette32 min
Aug 20, 4:56 PM CDTSevere Thunderstorm WarningBMXBibb34 min
Aug 20, 5:28 PM CDTSevere Thunderstorm WarningBMXPerry32 min
Aug 20, 6:30 PM CDTSevere Thunderstorm WarningBMXGreene, Hale45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990Every severe thunderstorm 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.