Alert archive / Alabama / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 321, NWS Birmingham, AL

May 6, 1998Marshall County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 6, 1998, 4:05 PM CDT for Marshall County, Alabama. It was in force for 60 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
May 6, 1998, 4:05 PM CDT (21:05 UTC)
Expired
May 6, 1998, 5:05 PM CDT
In force
60 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Marshall County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 6, 2:15 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.1 hours before the alert went out and 139 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 12:00Z on 1998-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 12:00Z on 1998-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.193958Sfc1 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
4 J/kg
Mixed-layer CIN
-335 J/kg
Mixed-layer LCL
1290 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
221 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 062105 RRA
SVRBHM
ALC095-062205-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
405 PM CDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARSHALL COUNTY... IN NORTHERN ALABAMA

* UNTIL 505 PM CDT

* AT 402 PM CDT... A SEVERE THUNDERSTORM WAS SHOWN...BY WEATHER RADAR
SOUTHEAST MORGAN COUNTY MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...ARAB BETWEEN 4:15 AND 4:30
PM.

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO
WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.


X

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 1:57 PM CDTSevere Thunderstorm WarningBMXColbert48 min
May 6, 2:04 PM CDTTornado WarningBMXColbert51 min
May 6, 2:51 PM CDTTornado WarningBMXColbert49 min
May 6, 3:01 PM CDTTornado WarningBMXLawrence34 min
May 6, 3:06 PM CDTTornado WarningBMXFranklin34 min
May 6, 3:09 PM CDTSevere Thunderstorm WarningBMXMorgan31 min
May 6, 3:35 PM CDTTornado WarningBMXFranklin35 min
May 6, 3:39 PM CDTTornado WarningBMXLawrence51 min
May 6, 3:40 PM CDTSevere Thunderstorm WarningBMXMorgan65 min
May 6, 4:03 PM CDTTornado WarningBMXMorgan47 min
May 6, 4:09 PM CDTTornado WarningBMXMarion, Winston51 min
May 6, 5:02 PM CDTSevere Thunderstorm WarningBMXCullman48 min
May 6, 5:22 PM CDTTornado WarningBMXCullman48 min
May 6, 5:43 PM CDTSevere Thunderstorm WarningBMXTuscaloosa47 min
May 6, 5:53 PM CDTSevere Thunderstorm WarningBMXBlount62 min
May 6, 6:27 PM CDTSevere Thunderstorm WarningBMXTuscaloosa33 min
May 6, 6:30 PM CDTSevere Thunderstorm WarningBMXPickens50 min
May 6, 6:34 PM CDTSevere Thunderstorm WarningBMXBibb46 min
May 6, 6:39 PM CDTSevere Thunderstorm WarningBMXJefferson46 min
May 6, 6:42 PM CDTSevere Thunderstorm WarningBMXSt. Clair63 min
May 6, 6:48 PM CDTSevere Thunderstorm WarningBMXShelby47 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.