Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

July 31, 2021Okaloosa County, Florida

NWS Mobile, AL issued this special weather statement at Jul 31, 2021, 6:31 PM CDT for Okaloosa County, Florida. It was in force for 44 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
Jul 31, 2021, 6:31 PM CDT (23:31 UTC)
Expired
Jul 31, 2021, 7:15 PM CDT
In force
44 min
Issued by
NWS Mobile, AL

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 57 km from the middle of the area, began a volume at 23:32 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.5 hours before the alert went out and 213 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2021-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2855 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2021-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2855 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

552 
WWUS84 KMOB 312331
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
631 PM CDT Sat Jul 31 2021
 
FLZ205-206-010015-
Okaloosa Inland FL-Okaloosa Coastal FL-
631 PM CDT Sat Jul 31 2021

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...EAST
CENTRAL OKALOOSA COUNTY UNTIL 715 PM CDT...

At 631 PM CDT, the strong thunderstorm was located 9 miles southeast 
of Crestview. This storm was nearly stationary or drifting slowly 
southeast.

Wind gusts of 40 to 50 mph will be possible with this storm.

This storm will remain over mainly rural areas of east central
Okaloosa County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3060 8664 3089 8644 3085 8639 3050 8639
TIME...MOT...LOC 2331Z 293DEG 4KT 3067 8646 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 2:44 AM CDTSpecial Marine WarningMOB2 hr
Jul 31, 5:23 AM CDTSpecial Marine WarningMOB2 hr
Jul 31, 7:28 AM CDTSpecial Marine WarningMOB92 min
Jul 31, 7:35 AM CDTSpecial Marine WarningMOB40 min
Jul 31, 12:18 PM CDTHeat AdvisoryMOBBaldwin, Mobile, Washington31 hr
Jul 31, 3:46 PM CDTSpecial Weather StatementMOBButler44 min
Jul 31, 3:52 PM CDTSpecial Weather StatementMOBEscambia38 min
Jul 31, 4:33 PM CDTSpecial Weather StatementMOBCovington, Escambia42 min
Jul 31, 6:27 PM CDTSpecial Weather StatementMOBEscambia48 min
Jul 31, 5:51 PM CDTSpecial Weather StatementMOBEscambia, Okaloosa, Santa Rosa39 min
Jul 31, 6:07 PM CDTSevere Thunderstorm WarningMOBEscambia38 min
Jul 31, 6:18 PM CDTSevere Thunderstorm WarningMOBSanta Rosa42 min

Nearby

Special Weather Statements in Florida, 2021Every special weather statement in 2021

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.