Alert archive / Alabama / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 621, NWS Birmingham, AL

July 26, 1998Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 26, 1998, 6:17 PM CDT for Winston County, Alabama. It was in force for 33 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
Jul 26, 1998, 6:17 PM CDT (23:17 UTC)
Expired
Jul 26, 1998, 6:50 PM CDT
In force
33 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Winston County, AL

The radar

The Columbus AFB radar (KGWX), 92 km from the middle of the area, began a volume at 23:19 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 12:00Z, 11.3 hours before the alert went out and 121 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 1998-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1079 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 1998-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 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
1079 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
-5 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 262317 RRA
SVRBHM
ALC133-262350-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
617 PM CDT SUN JUL 26 1998

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

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

* UNTIL 650 PM CDT

* AT 615 PM CDT... A SEVERE THUNDERSTORM WAS SHOWN...BY WEATHER
  RADAR...IN THE HALEYVILLE AREA.

* THE SEVERE THUNDERSTORM WAS MOVING SOUdTHEAST AT 20 MPH.  THE STORM
  WILL AFFECT THE HALEYVILLE...DELMAR...ASHRIDGE...AND AREAS ALONG
  HIGHWAY 13...AND 32.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING
AND STAY AWAY FROM WINDOWS!

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 5:58 PM CDTSevere Thunderstorm WarningBMXFranklin32 min
Jul 26, 6:21 PM CDTSevere Thunderstorm WarningBMXMarion34 min
Jul 26, 6:55 PM CDTSevere Thunderstorm WarningBMXMarion30 min
Jul 26, 6:57 PM CDTSevere Thunderstorm WarningBMXLamar33 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.