Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 43, NWS Birmingham, AL

May 1, 1990Jackson County, Marshall County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 1, 1990, 2:38 PM CDT for Jackson County, Marshall County, Alabama. It was in force for 52 min.

The area

The counties it named.

The facts

Issued: May 1, 1990, 2:38 PM CDT (19:38 UTC)
Expired: May 1, 1990, 3:30 PM CDT
In force: 52 min
Issued by: NWS Birmingham, AL
Area: Whole counties

Counties Jackson County, AL, Marshall 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, 7.6 hours before the alert went out and 178 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: 728 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 618 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 011942
SVRHSV
ALC071-095-012030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM
NATIONAL WEATHER SERVICE HUNTSVILLE AL
ISSUED BY BIRMINGHAM AL
238 PM CDT TUE MAY 1 1990
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH ALABAMA
 
   ...SOUTHERN JACKSON COUNTY...NORTHERN MARSHALL COUNTY
 
A VERY STRONG THUNDERSTORM WILL A PAST HISTORY OF HIGH WIND WILL MOVE
INTO NORTHERN MARSHALL AND SOUTHERN JACKSON COUNTIES DURING THE NEXT
30 MINUTES. IN ADDITION TO REPORTS OF HIGH WIND...THESE THUNDERSTORMS
ARE ACCOMPANIED BY DEADLY LIGHTNING AS WELL AS SEVERAL UNCONFIRMED
REPORTS OF TORNADOES. THIS THUNDERSTORM SHOULD CROSS THE WARNED AREA
BETWEEN GUNTERSVILLE AND SCOTTSBORO AND WILL CROSS GUNTERSVILLE LAKE.
 
ANYONE BOATING ON GUNTERSVILLE LAKE SHOULD SEEK SAFE HARBOR AS SOON AS
POSSIBLE.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 6

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 2:00 PM CDT	Severe Thunderstorm Warning	BMX	Limestone	60 min
May 1, 2:15 PM CDT	Tornado Warning	BMX	Madison	40 min
May 1, 2:25 PM CDT	Tornado Warning	BMX	Lawrence	30 min
May 1, 2:58 PM CDT	Severe Thunderstorm Warning	BMX	DeKalb	47 min
May 1, 4:27 PM CDT	Severe Thunderstorm Warning	BMX	Lamar	48 min
May 1, 4:31 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	59 min
May 1, 4:31 PM CDT	Severe Thunderstorm Warning	BMX	Cullman	59 min
May 1, 6:40 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson	65 min
May 1, 6:58 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Tuscaloosa	47 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; the sounding from the Mesonet's radiosonde archive.