Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 183, NWS Birmingham, AL

May 4, 1999Dallas County, Perry County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 4, 1999, 3:04 PM CDT for Dallas County, Perry County, Alabama. It was in force for 31 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 4, 1999, 3:04 PM CDT (20:04 UTC)
Expired
May 4, 1999, 3:35 PM CDT
In force
31 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Dallas County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 87 km from the middle of the area, began a volume at 20:07 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

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 8.1 hours before the alert went out and 232 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, Eglin AFB/Valpar, FL at 12:00Z on 1999-05-04Temperature 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, Eglin AFB/Valpar, FL at 12:00Z on 1999-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1519 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
292 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
May 4, 12:13 PM CDTSevere Thunderstorm WarningBMXSumter47 min
May 4, 1:07 PM CDTSevere Thunderstorm WarningBMXSumter33 min
May 4, 1:17 PM CDTSevere Thunderstorm WarningBMXGreene48 min
May 4, 2:12 PM CDTSevere Thunderstorm WarningBMXHale48 min
May 4, 3:21 PM CDTSevere Thunderstorm WarningBMXMarengo34 min
May 4, 3:36 PM CDTSevere Thunderstorm WarningBMXDallas49 min
May 4, 6:30 PM CDTSevere Thunderstorm WarningBMXBibb35 min
May 4, 6:41 PM CDTSevere Thunderstorm WarningBMXJefferson, Shelby34 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; radar from the NEXRAD Level II archive.