Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 9, NWS Birmingham, AL

January 17, 1999Lauderdale County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jan 17, 1999, 8:57 PM CST for Lauderdale County, Alabama. It was in force for 63 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
Jan 17, 1999, 8:57 PM CST (02:57 UTC)
Expired
Jan 17, 1999, 10:00 PM CST
In force
63 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Lauderdale County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.0 hours before the alert went out and 167 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, Nashville Metro, TN at 00:00Z on 1999-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 687 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, Nashville Metro, TN at 00:00Z on 1999-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 352 square meters per square second.1939587897Sfc1 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
687 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
343 m²/s²
Significant tornado parameter
1.4
Supercell composite
7.9

Open this sounding in Storm Lab

The text

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

999 
WUUS1 KBHM 180258 RRA
SVRBHM
ALC077-180400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
857 PM CST SUN JAN 17 1999

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

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

* UNTIL 1000 PM CST

* AT 855 PM CST... A SEVERE THUNDERSTORM PRODUCING LARGE HAIL WAS
  SHOWN...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING ACROSS
NORTHERN LAUDERDALE COUNTY.  THIS STORM IS MOVING OFF TO THE EAST
NORTHEAST AT NEAR 30 MILES PER HOUR.  GOLFBALL SIZED HAIL WAS REPORTED
WITH THIS STORM TO THE NORTH OF WATERLOO.  THIS EXTENDS THE PREVIOUS
SEVERE THUNDERSTORM WARNING.


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

THIS THUNDERSTORM IS CAPABLE OF PRODUCING EXTREMELY LARGE HAIL
WHICH MAY CAUSE SEVERE DAMAGE TO PROPERTY AND SERIOUS INJURY TO
PEOPLE AND LIVESTOCK. DAMAGING WINDS AND TORRENTIAL RAIN ARE ALSO
LIKELY WITH THIS STORM. MOVE TO A STURDY BUILDING AND STAY AWAY
FROM WINDOWS.

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 17, 7:57 PM CSTSevere Thunderstorm WarningBMXLauderdale63 min
Jan 17, 11:12 PM CSTSevere Thunderstorm WarningBMXFranklin48 min
Jan 17, 11:16 PM CSTSevere Thunderstorm WarningBMXLawrence64 min
Jan 17, 11:27 PM CSTSevere Thunderstorm WarningBMXLamar48 min
Jan 17, 11:29 PM CSTSevere Thunderstorm WarningBMXLimestone46 min
Jan 17, 11:47 PM CSTSevere Thunderstorm WarningBMXMarion48 min
Jan 17, 11:58 PM CSTSevere Thunderstorm WarningBMXMadison32 min
Jan 18, 12:07 AM CSTSevere Thunderstorm WarningBMXJackson48 min
Jan 18, 12:45 AM CSTSevere Thunderstorm WarningBMXCullman50 min
Jan 18, 12:56 AM CSTSevere Thunderstorm WarningBMXMarshall, Morgan49 min
Jan 18, 1:12 AM CSTSevere Thunderstorm WarningBMXWinston33 min
Jan 18, 1:33 AM CSTSevere Thunderstorm WarningBMXPickens32 min
Jan 18, 1:38 AM CSTSevere Thunderstorm WarningBMXDeKalb47 min
Jan 18, 1:40 AM CSTSevere Thunderstorm WarningBMXCullman50 min
Jan 18, 1:44 AM CSTSevere Thunderstorm WarningBMXWalker46 min
Jan 18, 1:50 AM CSTSevere Thunderstorm WarningBMXTuscaloosa45 min
Jan 18, 2:00 AM CSTSevere Thunderstorm WarningBMXBlount45 min
Jan 18, 2:18 AM CSTSevere Thunderstorm WarningBMXJefferson47 min
Jan 18, 2:29 AM CSTSevere Thunderstorm WarningBMXEtowah46 min
Jan 18, 2:34 AM CSTSevere Thunderstorm WarningBMXTuscaloosa21 min
Jan 18, 2:38 AM CSTSevere Thunderstorm WarningBMXMarshall47 min
Jan 18, 3:26 AM CSTSevere Thunderstorm WarningBMXCherokee49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999

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.