Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 14, NWS Birmingham, AL

April 15, 1993Greene County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 15, 1993, 12:05 PM CDT for Greene County, Alabama. It was in force for 25 min.

The area

The counties it named.

The facts

Issued: Apr 15, 1993, 12:05 PM CDT (17:05 UTC)
Expired: Apr 15, 1993, 12:30 PM CDT
In force: 25 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Greene County, AL

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 5.1 hours before the alert went out and 70 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4 J/kg
Mixed-layer CIN: -351 J/kg
Mixed-layer LCL: 1580 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 218 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

Special weather statement, Apr 15, 7:30 AM CDT, 4 hours 35 minutes before

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Special weather statement, Apr 15, 7:38 AM CDT, 4 hours 27 minutes before

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Special weather statement, Apr 15, 8:50 AM CDT, 3 hours 15 minutes before

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Special weather statement, Apr 15, 8:56 AM CDT, 3 hours 9 minutes before

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Special weather statement, Apr 15, 12:00 PM CDT, 5 minutes before

ALZ004>008-011-013-151900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1200 PM CDT THU APR 15 1993

    ...LINE OF THUNDERSTORMS DEVELOPS OVER WESTERN ALABAMA...

WEATHER RADAR AT 1155 AM INDICATED A NARROW LINE OF SHOWERS AND
THUNDERSTORMS ACROSS WESTERN.  THE LEADING EDGE OF THE LINE EXTENDED
FROM NEAR MUSCEL SHOALS/COLBERT COUNTY SOUTHWARD THROUGH FAYETTE/FAYETTE
COUNTY AND MOUNT HEBRON/GREENE COUNTY.  THE STRONGEST THUNDERSTORM IN THE
LINE WAS LOCATED OVER HEBRON IN WESTERN GREENE COUNTY.  THE STORM
PRODUCED NICKEL SIZED HAIL OVER NORTHERN SUMTER COUNTY JUST AFTER
1130 PM.  THE STORM WEAKENED TO A DEGREE AS IT MOVED INTO GREENE COUNTY.
THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.

PERSONS ACROSS WESTERN AND CENTRAL ALABAMA SHOULD REMAIN ALERT FOR
RAPIDLY CHANGING WEATHER CONDITIONS AND BE READY FOR QUICK ACTION IF
WARNINGS ARE ISSUED.

Special weather statement, Apr 15, 12:03 PM CDT, 2 minutes before

ALZ004>008-011-013-151900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1200 PM CDT THU APR 15 1993

    ...LINE OF THUNDERSTORMS DEVELOPS OVER WESTERN ALABAMA...

WEATHER RADAR AT 1155 AM INDICATED A NARROW LINE OF SHOWERS AND
THUNDERSTORMS ACROSS WESTERN.  THE LEADING EDGE OF THE LINE EXTENDED
FROM NEAR MUSCEL SHOALS/COLBERT COUNTY SOUTHWARD THROUGH FAYETTE/FAYETTE
COUNTY AND MOUNT HEBRON/GREENE COUNTY.  THE STRONGEST THUNDERSTORM IN THE
LINE WAS LOCATED OVER HEBRON IN WESTERN GREENE COUNTY.  THE STORM
PRODUCED NICKEL SIZED HAIL OVER NORTHERN SUMTER COUNTY JUST AFTER
1130 PM.  THE STORM WEAKENED TO A DEGREE AS IT MOVED INTO GREENE COUNTY.
THE THUNDERSTORMS WERE MOVING 6NORTHEAST AT 35 MILES AN HOUR.

PERSONS ACROSS WESTERN AND CENTRAL ALABAMA SHOULD REMAIN ALERT FOR
RAPIDLY CHANGING WEATHER CONDITIONS AND BE READY FOR QUICK ACTION IF
WARNINGS ARE ISSUED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 1:53 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Jefferson	67 min
Apr 15, 2:28 PM CDT	Tornado Warning	BMX	Jefferson	32 min
Apr 15, 2:31 PM CDT	Tornado Warning	BMX	Limestone	44 min
Apr 15, 3:15 PM CDT	Severe Thunderstorm Warning	BMX	Talladega	60 min
Apr 15, 4:29 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	46 min
Apr 15, 4:51 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	54 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1993 Every severe thunderstorm warning in 1993

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.