Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 71, NWS Mobile, AL

March 12, 2001Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Mar 12, 2001, 1:11 PM CST for Okaloosa County, Florida. It was in force for 49 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: Mar 12, 2001, 1:11 PM CST (19:11 UTC)
Expired: Mar 12, 2001, 2:00 PM CST
In force: 49 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Okaloosa County, FL

What was reported inside it

Time	Report	Where	Remark
Mar 12, 1:20 PM CST	Thunderstorm Wind 55 E	Blackman, FL	Several trees and power lines were blown down by high thunderstorm winds just west of Blackman.

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
Mar 12, 11:30 AM CST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.2 hours before the alert went out and 227 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: 946 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 121914
SVRMOB
FLC091-122000-

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 200 PM CST

* AT 111 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 12 MILES NORTHWEST OF LAUREL HILL
  TO 14 MILES WEST OF CANNON TOWN...MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  BLACKMAN...GALLIVER BY 125 PM CST
  BAKER...CANNON TOWN BY 130 PM CST
  MILLIGAN BY 135 PM CST
  CRESTVIEW BY 140 PM CST

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

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS.

LAT...LON 3095 8671 3097 8679 3067 8677 3068 8641
          3092 8642 3098 8641

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, 3:31 AM CST	Severe Thunderstorm Warning	MOB	Okaloosa, 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, 1:17 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.