Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 47, NWS Mobile, AL

March 12, 2001Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Mar 12, 2001, 3:31 AM CST for Okaloosa County, Santa Rosa County, Florida. It was in force for 29 min. 2 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: Mar 12, 2001, 3:31 AM CST (09:31 UTC)
Expired: Mar 12, 2001, 4:00 AM CST
In force: 29 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Okaloosa County, FL, Santa Rosa County, FL

What was reported inside it

Time	Report	Where	Remark
Mar 12, 3:35 AM CST	Hail 1.75	Harold, FL
Mar 12, 3:50 AM CST	Hail 1	Baker, 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.5 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 120931
SVRMOB
FLC091-113-121000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
331 AM CST MON MAR 12 2001

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SANTA ROSA COUNTY IN NORTHWEST FLORIDA
  OKALOOSA COUNTY IN NORTHWEST FLORIDA

* UNTIL 400 AM CST

* AT 331 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES WEST OF HAROLD...MOVING EAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BAKER...CANNON TOWN BY 340 AM CST
  CRESTVIEW BY 345 AM CST
  CRESTVIEW AIRPORT...PEADEN BY 350 AM CST
  DEERLAND...DORCAS BY 355 AM CST

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 3074 8698 3057 8691 3071 8641 3097 8643

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 3:01 AM CST	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	29 min
Mar 12, 12:12 PM CST	Severe Thunderstorm Warning	MOB	Escambia	48 min
Mar 12, 12:30 PM CST	Severe Thunderstorm Warning	MOB	Santa Rosa	45 min
Mar 12, 1:02 PM CST	Severe Thunderstorm Warning	MOB	Escambia	28 min
Mar 12, 1:11 PM CST	Severe Thunderstorm Warning	MOB	Okaloosa	49 min
Mar 12, 1:17 PM CST	Severe Thunderstorm Warning	MOB	Santa Rosa	43 min
Mar 12, 2:06 PM CST	Severe Thunderstorm Warning	MOB	Okaloosa	24 min

Nearby

Severe Thunderstorm Warnings in Florida, 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.