Alert archive / Alabama / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 87

April 3, 20016 counties in Alabama; George County, Greene County, Wayne County, Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Apr 3, 2001, 7:30 PM CDT for 6 counties in Alabama; George County, Greene County, Wayne County, Mississippi. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 3, 2001, 7:30 PM CDT (00:30 UTC)
Expired
Apr 3, 2001, 11:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center

Counties Clarke County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Monroe County, AL, Washington County, AL, George County, MS, Greene County, MS, Wayne County, MS

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 3, 9:31 PM CDTFlash Flood WarningMOBClarke, Washington89 min
Apr 3, 9:40 PM CDTSevere Thunderstorm WarningMOBMonroe35 min

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.5 hours before the alert went out and 247 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 2001-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 00:00Z on 2001-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 216 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
1 J/kg
Mixed-layer CIN
-239 J/kg
Mixed-layer LCL
547 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
216 m²/s²
0-3 km storm-relative helicity
292 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 6:00 AM CDTSevere Thunderstorm WatchSPCBaldwin, Bibb, Butler, Choctaw, Clarke, Colbert and 23 more5 hr
Apr 4, 11:00 AM CDTSevere Thunderstorm WatchSPCBaldwin, Bibb, Butler, Choctaw, Clarke, Conecuh and 15 more5 hr
Apr 4, 4:00 PM CDTSevere Thunderstorm WatchSPCChoctaw, Clarke, Marengo, Sumter4 hr
Apr 3, 9:00 PM CDTSevere Thunderstorm WatchSPCBenton, Bolivar, Calhoun, Carroll, Chickasaw, Clay and 18 more5 hr

Nearby

Severe Thunderstorm Watches in Alabama, 2001Severe Thunderstorm Watches in Mississippi, 2001Every severe thunderstorm watch in 2001

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.