Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Mobile, AL

July 22, 2018Okaloosa County, Florida

NWS Mobile, AL issued this special weather statement at Jul 22, 2018, 7:21 PM CDT for Okaloosa County, Florida. It was in force for 39 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 22, 2018, 7:21 PM CDT (00:21 UTC)
Expired
Jul 22, 2018, 8:00 PM CDT
In force
39 min
Issued by
NWS Mobile, AL

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 46 km from the middle of the area, began a volume at 00:26 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 00:00Z, 0.4 hours before the alert went out and 201 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 00:00Z on 2018-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1072 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2018-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 square meters per square second.19395878Sfc1 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
1072 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
1007 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.5
Supercell composite
6.4

Open this sounding in Storm Lab

The text

As transmitted.

733 
WWUS84 KMOB 230021
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
721 PM CDT SUN JUL 22 2018
 
FLZ205-206-230100-
Okaloosa Inland FL-Okaloosa Coastal FL-
721 PM CDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...
SOUTHERN OKALOOSA COUNTY UNTIL 800 PM CDT...

At 721 PM CDT, the strong thunderstorm was located 9 miles south of
Crestview, moving east at 40 mph.

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

Locations impacted include...
Niceville, Valparaiso and Eglin Air Force Base. 

LAT...LON 3046 8632 3047 8639 3052 8672 3071 8668
      3070 8639 3048 8639 3047 8638 3047 8635
      3048 8633 3047 8630 3048 8628 3045 8628
TIME...MOT...LOC 0021Z 277DEG 35KT 3062 8661 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 7:58 PM CDTSpecial Marine WarningMOB62 min
Jul 22, 10:03 PM CDTSpecial Marine WarningMOB57 min
Jul 22, 7:55 PM CDTSpecial Weather StatementMOBOkaloosa50 min

Nearby

Special Weather Statements in Florida, 2018Every special weather statement in 2018

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.