Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 130, NWS Birmingham, AL

April 15, 1999Sumter County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 15, 1999, 12:02 AM CDT for Sumter County, Alabama. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 15, 1999, 12:02 AM CDT (05:02 UTC)
Expired
Apr 15, 1999, 12:50 AM CDT
In force
48 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Sumter County, AL

What was reported inside it

TimeReportWhereRemark
Apr 15, 12:30 AM CDTHail 0.75Bellamy, ALDime size hail fell in Bellamy and in Coatopa.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 14, 10:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 5.0 hours before the alert went out and 148 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 1999-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1999-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 264 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2269 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
264 m²/s²
0-3 km storm-relative helicity
501 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 12:19 AM CDTTornado WarningBMXSumter51 min
Apr 15, 12:54 AM CDTSevere Thunderstorm WarningBMXGreene, Hale51 min
Apr 15, 1:16 AM CDTSevere Thunderstorm WarningBMXWalker34 min
Apr 15, 1:36 AM CDTTornado WarningBMXMarengo49 min
Apr 15, 2:05 AM CDTSevere Thunderstorm WarningBMXJefferson35 min
Apr 15, 2:26 AM CDTTornado WarningBMXDallas49 min
Apr 15, 3:09 AM CDTSevere Thunderstorm WarningBMXAutauga51 min
Apr 15, 3:14 AM CDTTornado WarningBMXDallas31 min
Apr 15, 3:20 AM CDTTornado WarningBMXLowndes60 min
Apr 15, 3:41 AM CDTSevere Thunderstorm WarningBMXTalladega34 min
Apr 15, 3:58 AM CDTSevere Thunderstorm WarningBMXMontgomery47 min
Apr 15, 3:58 AM CDTSevere Thunderstorm WarningBMXCalhoun47 min
Apr 15, 4:43 AM CDTSevere Thunderstorm WarningBMXBullock, Pike62 min
Apr 15, 5:48 AM CDTTornado WarningBMXBullock, Pike32 min
Apr 15, 5:55 AM CDTTornado WarningBMXBarbour60 min
Apr 15, 6:00 AM CDTSevere Thunderstorm WarningBMXRussell35 min
Apr 15, 6:16 AM CDTTornado WarningBMXRussell34 min
Apr 15, 7:16 AM CDTSevere Thunderstorm WarningBMXBarbour49 min
Apr 15, 7:25 AM CDTTornado WarningBMXBarbour35 min
Apr 15, 8:09 AM CDTTornado WarningBMXJackson31 min
Apr 15, 11:12 AM CDTSevere Thunderstorm WarningBMXChambers33 min
Apr 15, 6:21 AM CDTTornado WarningBMXChattahoochee, Stewart49 min
Apr 15, 7:34 AM CDTSevere Thunderstorm WarningBMXStewart51 min
Apr 15, 7:38 AM CDTTornado WarningBMXQuitman62 min
Apr 15, 7:50 AM CDTTornado WarningBMXStewart50 min
Apr 15, 8:41 AM CDTSevere Thunderstorm WarningBMXQuitman, Stewart49 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.