Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 152, NWS Birmingham, AL

August 29, 1990Lawrence County, Morgan County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 29, 1990, 7:51 PM CDT for Lawrence County, Morgan County, Alabama. It was in force for 69 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 29, 1990, 7:51 PM CDT (00:51 UTC)
Expired: Aug 29, 1990, 9:00 PM CDT
In force: 69 min
Issued by: NWS Birmingham, AL
Area: Whole counties

Counties Lawrence 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.

What was reported inside it

Time	Report	Where	Remark
Aug 29, 8:58 PM CDT	Hail 0.75	Morgan, AL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 00:00Z, 0.9 hours before the alert went out and 177 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: 1492 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 2140 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHSV 300053
SVRHSV
ALC079-103-300200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
751 PM CDT WED AUG 29 1990
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM CDT
 
 
IN NORTH ALABAMA
 
   ...LAWRENCE COUNTY...MORGAN COUNTY
 
HUNTSVILLE RADAR AT 751 THIS EVENING INDICATED A POSSIBLE SEVERE
THUNDERSTORM JUST NORTH OF COURTLAND. THIS THUNDERSTORM WAS MOVING
SOUTHEAST AT 35 MPH. THIS THUNDERSTORM WILL BE APPROACHING TRINITY
AND THE CITY OF DECATUR DURING THE NEXT HOUR.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'zT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 9:02 PM CDT	Severe Thunderstorm Warning	BMX	Morgan	58 min
Aug 29, 9:18 PM CDT	Severe Thunderstorm Warning	BMX	Limestone	57 min
Aug 29, 10:26 PM CDT	Severe Thunderstorm Warning	BMX	Madison	64 min
Aug 29, 10:50 PM CDT	Severe Thunderstorm Warning	BMX	Marshall, Morgan	55 min
Aug 30, 5:13 AM CDT	Severe Thunderstorm Warning	BMX	Hale	47 min
Aug 30, 8:02 AM CDT	Severe Thunderstorm Warning	BMX	Bibb	28 min
Aug 30, 8:15 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Shelby	60 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.