Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 310, NWS Mobile, AL

December 10, 2023Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Dec 10, 2023, 3:38 AM CST for Okaloosa County, Santa Rosa County, Florida. It was in force for 52 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: Dec 10, 2023, 3:38 AM CST (09:38 UTC)
Expired: Dec 10, 2023, 4:30 AM CST
In force: 52 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 76 km from the middle of the area, began a volume at 09:42 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
Dec 10, 12:58 AM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.6 hours before the alert went out and 229 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: 11 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

871 
WUUS54 KMOB 100938
SVRMOB
FLC091-113-101030-
/O.NEW.KMOB.SV.W.0310.231210T0938Z-231210T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
338 AM CST Sun Dec 10 2023

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southern Okaloosa County in northwestern Florida...
  Southeastern Santa Rosa County in northwestern Florida...

* Until 430 AM CST.

* At 336 AM CST, severe thunderstorms were located along a line
  extending from 3 miles northeast of Navarre to 4 miles southeast of
  Navarre Beach to 17 miles southeast of Pensacola Beach, moving
  northeast at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  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, Navarre,
  Shalimar, Cinco Bayou, and Navarre Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

Damaging winds and continuous cloud to ground lightning are 
occurring with these storms. Move indoors immediately. Lightning is 
one of nature's leading killers. Remember, if you can hear thunder, 
you are close enough to be struck by lightning.

A Tornado Watch remains in effect until 800 AM CST for northwestern 
Florida.

&&

LAT...LON 3026 8699 3036 8698 3037 8692 3037 8699
      3057 8705 3078 8639 3046 8639 3046 8636
      3039 8637 3040 8639 3029 8639 3029 8678
TIME...MOT...LOC 0936Z 238DEG 34KT 3046 8688 3034 8680 3013 8695 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

21/CLL

1 follow-up statement

092 
WWUS54 KMOB 101013
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
413 AM CST Sun Dec 10 2023

FLC113-101022-
/O.CAN.KMOB.SV.W.0310.000000T0000Z-231210T1030Z/
Santa Rosa FL-
413 AM CST Sun Dec 10 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SANTA ROSA COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 800 AM CST for northwestern
Florida.

LAT...LON 3029 8664 3040 8664 3069 8668 3078 8639
      3046 8639 3046 8636 3039 8637 3040 8639
      3029 8639
TIME...MOT...LOC 1012Z 241DEG 36KT 3067 8655 3050 8645 3035 8649 

$$

FLC091-101030-
/O.CON.KMOB.SV.W.0310.000000T0000Z-231210T1030Z/
Okaloosa FL-
413 AM CST Sun Dec 10 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CST
FOR SOUTHEASTERN OKALOOSA COUNTY...

At 412 AM CST, severe thunderstorms were located along a line
extending from 5 miles south of Crestview to Niceville to 3 miles
south of Destin, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Wright, Fort Walton Beach, Niceville, Destin, Eglin AFB, Valparaiso,
Ocean City, Lake Lorraine, Shalimar, and Cinco Bayou.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of 
a building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3029 8664 3040 8664 3069 8668 3078 8639
      3046 8639 3046 8636 3039 8637 3040 8639
      3029 8639
TIME...MOT...LOC 1012Z 241DEG 36KT 3067 8655 3050 8645 3035 8649 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

21/CLL

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 1:58 AM CST	Severe Thunderstorm Warning	MOB	Escambia	33 min
Dec 10, 3:11 AM CST	Special Weather Statement	MOB	Santa Rosa	64 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023 Every severe thunderstorm warning in 2023

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.