Alert archive / Alabama / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 129, NWS Birmingham, AL

April 1, 1998Tallapoosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 1, 1998, 1:39 AM CST for Tallapoosa County, Alabama. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 1, 1998, 1:39 AM CST (07:39 UTC)
Expired
Apr 1, 1998, 2:25 AM CST
In force
46 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 36 km from the middle of the area, began a volume at 07:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 7.7 hours before the alert went out and 98 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, Birmingham, AL at 00:00Z on 1998-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 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, Birmingham, AL at 00:00Z on 1998-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 221 square meters per square second.19395878Sfc1 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
57 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1656 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
221 m²/s²
0-3 km storm-relative helicity
260 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

777 
WUUS1 KBHM 010740 RRA
SVRBHM
ALC123-010825-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
139 AM CST WED APR 1 1998


THE NATIONAL WEATHER SERVICE IN BIRMINGHAM AL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 225 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL ALABAMA

   ...TALLAPOOSA COUNTY...

AT 136 AM CST... WEATHER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
EXTENDING FROM NEAR ALEXANDER CITY...ACROSS LAKE MARTIN TO NEAR
CARRVILLE.  THIS LINE WAS MOVING EAST AT 25 MPH AND WILL MOVE THROUGH
DADEVILLE AND CAMP HILL BETWEEN 145 AM AND 215 AM.


<<CALL TO ACTION>>
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 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 DONT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 2:20 AM CSTSevere Thunderstorm WarningBMXChambers35 min
Apr 1, 2:51 AM CSTSevere Thunderstorm WarningBMXBullock, Macon34 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1998Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.