Alert archive / Alabama / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 143, NWS Mobile, AL

August 17, 2001Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 17, 2001, 7:53 PM CDT for Choctaw County, Alabama. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 17, 2001, 7:53 PM CDT (00:53 UTC)
Expired: Aug 17, 2001, 9:00 PM CDT
In force: 67 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Choctaw County, AL

What was reported inside it

Time	Report	Where	Remark
Aug 17, 8:00 PM CDT	Thunderstorm Wind 50 E	Butler, AL	High winds from thunderstorms blew down numerous trees along SR 10 between Lisman and Butler. A couple of the trees landed on vehicles.

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 nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.9 hours before the alert went out and 166 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1819 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1069 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

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

255 
WUUS54 KMOB 180054
SVRMOB
ALC023-180200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
753 PM CDT FRI AUG 17 2001

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHOCTAW COUNTY IN SOUTHWEST ALABAMA

* UNTIL 900 PM CDT

* AT 753 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 4 MILES NORTHWEST OF YANTLEY TO 6
  MILES SOUTH OF ISNEY...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PARAGON...PUSHMATAHA BY 800 PM CDT
  BOLINGER...GILBERTOWN BY 805 PM CDT
  CROMWELL...HODGEWOOD BY 810 PM CDT
  BUTLER...BARRYTOWN BY 820 PM CDT

BRIEF...STRONG DAMAGING WIND GUSTS AND DEADLY LIGHTNING ARE LIKELY 
WITH THESE STORMS.  IF IN THE PATH OF THESE STORMS...TAKE COVER IN A 
STURDY SHELTER UNTIL THE STORMS HAVE PASSED.

LAT...LON 3240 8857 3172 8845 3173 8816 3198 8818
          3226 8807

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 8:08 PM CDT	Severe Thunderstorm Warning	MOB	Washington	52 min
Aug 18, 2:39 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	51 min
Aug 18, 2:55 PM CDT	Tornado Warning	MOB	Baldwin	35 min
Aug 18, 3:57 PM CDT	Severe Thunderstorm Warning	MOB	Covington	33 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2001 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.