Alert archive / Florida / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 31, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Jan 21, 2017, 9:56 AM CST for Okaloosa County, Florida. It was in force for 34 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
- Jan 21, 2017, 9:56 AM CST (15:56 UTC)
- Expired
- Jan 21, 2017, 10:30 AM CST
- In force
- 34 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Okaloosa County, FL
The radar
The Eglin Afb radar (KEVX), 61 km from the middle of the area, began a volume at 15:56 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 |
|---|---|---|---|
| Jan 21, 3:56 AM CST | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.9 hours before the alert went out and 216 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
- 352 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.0
The text
As transmitted.
591
WUUS54 KMOB 211556
SVRMOB
FLC091-211630-
/O.NEW.KMOB.SV.W.0031.170121T1556Z-170121T1630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
956 AM CST SAT JAN 21 2017
The National Weather Service in Mobile has issued a
* Severe Thunderstorm Warning for...
Okaloosa County in northwestern Florida...
* Until 1030 AM CST
* At 956 AM CST, severe thunderstorms were located along a line
extending from Crestview to near Navarre Beach, moving east at 55
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Wright, Fort Walton Beach, Crestview, Niceville, Destin, Eglin AFB,
Valparaiso, Mary Esther, Ocean City, Lake Lorraine, Shalimar, Cinco
Bayou and Eglin Air Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A tornado watch remains in effect until 1100 AM CST for northwestern
Florida.
LAT...LON 3040 8630 3042 8631 3038 8633 3040 8639
3038 8640 3038 8650 3035 8650 3037 8689
3039 8680 3039 8684 3038 8688 3040 8688
3041 8680 3060 8680 3079 8672 3082 8639
3046 8639 3048 8628 3040 8628
TIME...MOT...LOC 1556Z 269DEG 47KT 3076 8661 3044 8680
HAIL...<.75IN
WIND...60MPH
$$1 follow-up statement
177
WWUS54 KMOB 211625
SVSMOB
Severe Weather Statement
National Weather Service Mobile AL
1025 AM CST SAT JAN 21 2017
FLC091-211630-
/O.CON.KMOB.SV.W.0031.000000T0000Z-170121T1630Z/
Okaloosa FL-
1025 AM CST SAT JAN 21 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CST
FOR SOUTHERN OKALOOSA COUNTY...
At 1024 AM CST, severe thunderstorms were located along a line
extending from 7 miles north of Eglin Air Force Base to Fort Walton
Beach, moving east at 30 mph. A new severe thunderstorm warning may
soon be issued for this area.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Wright, Fort Walton Beach, Niceville, Destin, Eglin AFB, Valparaiso,
Mary Esther, Ocean City, Lake Lorraine, Shalimar, Cinco Bayou and
Eglin Air Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A tornado watch remains in effect until 1100 AM CST for northwestern
Florida.
LAT...LON 3040 8630 3042 8631 3038 8633 3040 8639
3038 8640 3038 8650 3035 8650 3037 8682
3037 8683 3039 8680 3039 8681 3041 8680
3049 8670 3059 8655 3068 8639 3046 8639
3048 8628 3040 8628
TIME...MOT...LOC 1624Z 276DEG 25KT 3072 8627 3043 8664
HAIL...<.75IN
WIND...60MPH
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 20, 8:47 PM CST | River Flood Warning | MOB | Escambia | 25 hr |
| Jan 20, 8:48 PM CST | River Flood Warning | MOB | Okaloosa, Santa Rosa | 3 days |
| Jan 20, 8:49 PM CST | River Flood Warning | MOB | Okaloosa | 25 hr |
| Jan 20, 10:18 PM CST | Rip Current Statement | MOB | Escambia, Okaloosa, Santa Rosa | 56 hr |
| Jan 21, 7:28 AM CST | Wind Advisory | MOB | Escambia, Okaloosa, Santa Rosa | 4 hr |
| Jan 21, 9:14 AM CST | Special Weather Statement | MOB | Escambia, Okaloosa, Santa Rosa | 91 min |
| Jan 21, 9:25 AM CST | Severe Thunderstorm Warning | MOB | Okaloosa | 50 min |
| Jan 21, 10:28 AM CST | Severe Thunderstorm Warning | MOB | Okaloosa | 32 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2017Every severe thunderstorm warning in 2017
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.