Alert archive / Florida / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 21, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Feb 19, 2009, 12:30 AM CST for Okaloosa County, Florida. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 19, 2009, 12:30 AM CST (06:30 UTC)
- Expired
- Feb 19, 2009, 1:06 AM CST
- In force
- 36 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Okaloosa County, FL
The radar
The Eglin Afb radar (KEVX), 57 km from the middle of the area, began a volume at 06:31 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 18, 7:42 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 6.5 hours before the alert went out and 211 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.
- Mixed-layer CAPE
- 177 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 515 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 371 m²/s²
- 0-3 km storm-relative helicity
- 426 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KMOB 190630
SVRMOB
FLC091-190730-
/O.NEW.KMOB.SV.W.0021.090219T0630Z-090219T0730Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1230 AM CST THU FEB 19 2009
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
THIS INCLUDES THE CITIES OF...FORT WALTON BEACH...DESTIN...
* UNTIL 130 AM CST
* AT 1223 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A LINE
OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS OVER
60 MPH AND PENNY SIZE HAIL. THESE STORMS WERE ALONG A LINE
EXTENDING FROM NICEVILLE TO 9 MILES SOUTHEAST OF NAVARRE...MOVING
EAST AT 40 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
DESTIN BY 1235 AM CST...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CST
THURSDAY MORNING FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.
LAT...LON 3039 8649 3040 8651 3039 8653 3040 8678
3050 8661 3056 8641 3053 8638 3046 8639
3046 8642 3049 8645 3043 8655 3044 8658
3042 8657 3041 8652 3043 8646 3041 8639
3039 8638
TIME...MOT...LOC 0628Z 276DEG 25KT 3047 8642 3029 8687
$$1 follow-up statement
000
WWUS54 KMOB 190706
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
106 AM CST THU FEB 19 2009
FLC091-190714-
/O.CAN.KMOB.SV.W.0021.000000T0000Z-090219T0730Z/
OKALOOSA FL-
104 AM CST THU FEB 19 2009
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OKALOOSA COUNTY IS
CANCELLED...
THE LINE OF SEVERE THUNDERSTORMS HAVE MOVED SOUTHEAST OF THE FORT
WALTON AND DESTIN AREAS. THUNDERSTORMS WILL CONTINUE ALONG THE
BEACHES THROUGH 2 AM...PRODUCING GUSTY WINDS AROUND 40 MPH AND HEAVY
RAINS.
LAT...LON 3039 8649 3040 8651 3039 8653 3040 8678
3050 8661 3056 8641 3053 8638 3046 8639
3046 8642 3049 8645 3043 8655 3044 8658
3042 8657 3041 8652 3043 8646 3041 8639
3039 8638
TIME...MOT...LOC 0704Z 273DEG 20KT 3046 8618 3028 8663
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 8:20 PM CST | Severe Thunderstorm Warning | MOB | Escambia, Santa Rosa | 25 min |
| Feb 18, 8:44 PM CST | Severe Thunderstorm Warning | MOB | Okaloosa, Santa Rosa | 31 min |
| Feb 18, 9:15 PM CST | Severe Thunderstorm Warning | MOB | Okaloosa | 15 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2009Every severe thunderstorm warning in 2009
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; radar from the NEXRAD Level II archive.