Alert archive / Alabama / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 337

May 31, 200129 counties in Alabama

The Storm Prediction Center issued this severe thunderstorm watch at May 31, 2001, 2:30 PM CDT for 29 counties in Alabama. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 31, 2001, 2:30 PM CDT (19:30 UTC)
Expired
May 31, 2001, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 29 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Cullman County, AL, Dallas County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Marion County, AL, Monroe County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 31, 3:13 PM CDTSevere Thunderstorm WarningBMXTuscaloosa47 min
May 31, 3:59 PM CDTSevere Thunderstorm WarningBMXTuscaloosa46 min
May 31, 4:03 PM CDTSevere Thunderstorm WarningBMXJefferson, Walker42 min
May 31, 4:39 PM CDTSevere Thunderstorm WarningBMXDallas36 min
May 31, 4:45 PM CDTSevere Thunderstorm WarningBMXJefferson30 min
May 31, 5:52 PM CDTSevere Thunderstorm WarningBMXSt. Clair38 min

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.5 hours before the alert went out and 116 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 2001-05-31Temperature 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 12:00Z on 2001-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -242 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
909 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-242 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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
May 30, 11:00 PM CDTSevere Thunderstorm WatchSPCFranklin5 hr
May 31, 6:30 PM CDTSevere Thunderstorm WatchSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 6 more6 hr

Nearby

Severe Thunderstorm Watches in Alabama, 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.