Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 87, NWS Mobile, AL

April 4, 2001Escambia County, Santa Rosa County, Florida; Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 4, 2001, 12:36 PM CDT for Escambia County, Santa Rosa County, Florida; Escambia County, Alabama. It was in force for 24 min. 4 reports 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: Apr 4, 2001, 12:36 PM CDT (17:36 UTC)
Expired: Apr 4, 2001, 1:00 PM CDT
In force: 24 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Escambia County, AL, Escambia County, FL, Santa Rosa County, FL

What was reported inside it

Time	Report	Where
Apr 4, 12:40 PM CDT	Hail 1.75	Atmore, AL
Apr 4, 12:45 PM CDT	Thunderstorm Wind 55 E	Atmore, AL
Apr 4, 12:45 PM CDT	Hail 1.75	Canoe, AL
Apr 4, 12:50 PM CDT	Hail 1	Bratt, FL

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.

Issued	Product	Office	Lasted
Apr 4, 11:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.6 hours before the alert went out and 244 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: 1686 J/kg
Mixed-layer CIN: -198 J/kg
Mixed-layer LCL: 588 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 041742 CCA
SVRMOB

ALC053-FLC033-113-041800-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED TO ADD ESCAMBIA COUNTY AL
NATIONAL WEATHER SERVICE MOBILE AL
1236 PM CDT WED APR 4 2001

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ESCAMBIA COUNTY IN SOUTHWEST ALABAMA
  ESCAMBIA COUNTY IN NORTHWEST FLORIDA
  SANTA ROSA COUNTY IN NORTHWEST FLORIDA

* UNTIL 100 PM CDT

* AT 1236 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR ROBINSONVILLE...MOVING SOUTHEAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FLOMATON BY 1245 PM CDT
  CENTURY...MCDAVID BY 1250 PM CDT
  JAY BY 100 PM CDT

STRONG DAMAGING WIND...LARGE HAIL...AND HEAVY RAIN ARE LIKELY WITH
THIS STORM.  IF IN THE PATH OF THIS STORM...TAKE COVER IN A STURDY
SHELTER UNTIL THE STORM HAS PASSED.

LAT...LON 3114 8742 3100 8754 3070 8713 3088 8697

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:08 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	17 min
Apr 3, 7:22 PM CDT	Severe Thunderstorm Warning	MOB	Washington	23 min
Apr 3, 9:31 PM CDT	Flash Flood Warning	MOB	Clarke, Washington	89 min
Apr 3, 9:40 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	35 min
Apr 4, 6:50 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Marengo	25 min
Apr 4, 7:50 AM CDT	Flash Flood Warning	MOB	Marengo	85 min
Apr 4, 8:15 AM CDT	Flash Flood Warning	MOB	Choctaw	90 min
Apr 4, 8:58 AM CDT	Severe Thunderstorm Warning	MOB	Washington	32 min
Apr 4, 9:01 AM CDT	Severe Thunderstorm Warning	MOB	Butler	19 min
Apr 4, 9:30 AM CDT	Severe Thunderstorm Warning	MOB	Washington	30 min
Apr 4, 9:45 AM CDT	Flash Flood Warning	MOB	Choctaw	90 min

Nearby

Severe Thunderstorm Warnings in Florida, 2001 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.