Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 169, NWS Birmingham, AL

December 30, 1990Madison County, Morgan County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Dec 30, 1990, 3:17 PM CST for Madison County, Morgan County, Alabama. It was in force for 16 min.

The area

The counties it named.

The facts

Issued
Dec 30, 1990, 3:17 PM CST (21:17 UTC)
Expired
Dec 30, 1990, 3:33 PM CST
In force
16 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Madison 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 12:00Z, 9.3 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 12:00Z on 1990-12-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 165 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, Nashville Metro, TN at 12:00Z on 1990-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 327 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
165 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
327 m²/s²
0-3 km storm-relative helicity
360 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHSV 302118
SVRHSV
ALC089-103-302215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
317 PM CST SUN DEC 30 1990
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM CST
 
 
IN NORTH ALABAMA
 
   ...MADISON COUNTY...MORGAN COUNTY
 
HUNTSVILLE RADAR AT 315 THIS AFTERNOON INDICATED POSSIBLE SEVERE
THUNDERSTORMS IN MADISON COUNTY NEAR TONEY AND IN LAWRENCE COUNTY
MOVING TOWARDS DECATUR IN MORGAN COUNTY.
 
SEVERE THUNDERSTORM WARNINS ARE IN EFFECT FOR LIMESTONE COUNTY UNTIL
330 AND LAWRENCE COUNTY UNTIL 400 PM.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

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

Special weather statement, Dec 30, 1:54 PM CST, 1 hour 23 minutes before
ALZ004>008-011-013-302100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1:54 PM CST SAT DEC 29 1990

    ...SHOWERS AND THUNDERSTORMS MOVING INTO WEST CENTRAL ALABAMA...

AT 1:50 PM CST...NATIONAL WEATHER SERVICE RADAR IN CENTREVILLE INDICATED A
LINE OF SHOWERS AND THUNDERSTORMS MOVING INTO WEST CENTRAL ALABAMA. THE
SHOWERS AND THUNDERSTORMS ARE THE RESULT OF A VERY STRONG ARCTIC COLD FRONT
MOVING INTO THE WARM AND MOIST AIRMASS IN PLACE ACROSS THE STATE OF
ALABAMA.

THE SHOWERS AND THUNDERSTORMS EXTENDED FROM NEAR MUSCLE SHOALS TO JUST WEST
OF THE MARION COUNTY AND MISSISSIPPI BORDER AND BACK INTO EAST CENTRAL
MISSISSIPPI. THE STRONGEST STORMS ARE EXPECTED TO MOVE INTO MARION AND
LAMAR COUNTIES WITHIN THE NEXT HOUR. THESE STORMS ARE CAPABLE OF PRODUCING
HEAVY RAIN AND STRONG GUSTY WINDS. MOVEMENT OF THESE STORMS WAS TO THE
NORTHEAST AT 45 MPH. OTHER SCATTERED SHOWERS HAVE ALREADY DEVELOPED OVER
WEST CENTRAL ALABHAMA.
Special weather statement, Dec 30, 2:53 PM CST, 24 minutes before
ALZ004>008-011-013-302200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
2:50 PM CST SUN DEC 30 1990

    ...TORNADO WATCH IN EFFECT FOR NORTH AND WEST ALABAMA
        UNTIL 8PM CST...

AT 2:45 PM CST...NATIONAL WEATHER SERVICE RADAR IN CENTREVILLE INDICATED A
LINE OF SHOWERS AND THUNDERSTORMS MOVING ACROSS NORTHWEST AND WEST CENTRAL
ALABAMA. THE SHOWERS AND THUNDERSTORMS EXTENDING FROM NEAR MUSCLE SHOALS
SOUTHWESTWARD TO NEAR DOUBLE SPRINGS IN WINSTON COUNTY TO NEAR SULLIGENT IN
LAMAR COUNTY AND BACK INTO EAST CENTRAL MISSISSIPPI. MOVEMENT OF THE
THUNDERSTORMS WAS TO THE NORTHEAST AT 45 MPH. THE STRONGEST STORMS WERE NEAR
BRILLIANT IN MARION COUNTY AND JUST WEST OF VERNON IN LAMAR COUNTY. THESE STORMSARE CAPABLE OF PRODUCING HEAVY RAIN...AND STRONG GUSTY WINDS.

PEOPLE IN NORTH AND WEST ALABAMA ARE URGED TO STAY INFORMED OF THE LATEST
WEATHER DEVELOPMENTS BY TUNING IN NOAA WEATHER RADIO...OR LOCAL RADIO AND
TV STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 2:44 PM CSTSevere Thunderstorm WarningBMXLimestone46 min
Dec 30, 3:00 PM CSTSevere Thunderstorm WarningBMXLawrence33 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.