Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 56, NWS Tallahassee, FL

April 9, 2021Bay County, Gulf County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 9, 2021, 11:04 AM CDT for Bay County, Gulf County, Florida. It was in force for 41 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
Apr 9, 2021, 11:04 AM CDT (16:04 UTC)
Expired
Apr 9, 2021, 11:45 AM CDT
In force
41 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Bay County, FL, Gulf County, FL

The radar

The Eglin Afb radar (KEVX), 72 km from the middle of the area, began a volume at 16:06 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, 4.1 hours before the alert went out and 121 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 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1133 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 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
1133 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.5

Open this sounding in Storm Lab

The text

As transmitted.

530 
WUUS52 KTAE 091604
SVRTAE
FLC005-045-091645-
/O.NEW.KTAE.SV.W.0056.210409T1604Z-210409T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
1204 PM EDT Fri Apr 9 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Northwestern Gulf County in the Panhandle of Florida...
  Southeastern Bay County in the Panhandle of Florida...

* Until 1245 PM EDT/1145 AM CDT/.

* At 1203 PM EDT/1103 AM CDT/, severe thunderstorms were located
  along a line extending from near Panama City to near Tyndall Air
  Force Base to 16 miles southwest of Callaway, moving east at 30
  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...
  Panama City, Callaway, Springfield, Mexico Beach, Tyndall Air Force
  Base, Wewahitchka, Parker, St Andrews State Park, Allanton, Beacon
  Beach, Bay Harbor, Overstreet, Davis Beach, Wetappo, Beacon Hill,
  Saint Joe Beach and Honeyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay 
away from windows. Remember, if you can hear thunder, you are close 
enough to be struck by lightning.

&&

LAT...LON 3013 8576 3020 8523 3002 8518 2988 8526
      2990 8552 3002 8572
TIME...MOT...LOC 1603Z 270DEG 27KT 3011 8569 3003 8564 2993 8571 

HAIL...1.00IN
WIND...60MPH
 
$$
2 follow-up statements
459 
WWUS52 KTAE 091630
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
1230 PM EDT Fri Apr 9 2021

FLC005-045-091645-
/O.CON.KTAE.SV.W.0056.000000T0000Z-210409T1645Z/
Gulf FL-Bay FL-
1230 PM EDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM
EDT/1145 AM CDT/ FOR NORTHWESTERN GULF AND SOUTHEASTERN BAY
COUNTIES...

At 1229 PM EDT/1129 AM CDT/, severe thunderstorms were located along
a line extending from 6 miles northeast of Tyndall Air Force Base to
near Mexico Beach, moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Callaway, Springfield, Mexico Beach, Tyndall Air Force Base,
Wewahitchka, Parker, Allanton, Overstreet, Davis Beach, Wetappo,
Beacon Hill, Saint Joe Beach and Honeyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from 
windows. Remember, if you can hear thunder, you are close enough to 
be struck by lightning.

&&

LAT...LON 2989 8548 2990 8548 2990 8551 2993 8557
      3003 8560 3015 8561 3020 8523 3002 8518
      2988 8526
TIME...MOT...LOC 1629Z 270DEG 27KT 3011 8547 3003 8542 2993 8549 

HAIL...0.75IN
WIND...60MPH
 
$$
004 
WWUS52 KTAE 091644
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
1244 PM EDT Fri Apr 9 2021

FLC005-045-091654-
/O.EXP.KTAE.SV.W.0056.000000T0000Z-210409T1645Z/
Gulf FL-Bay FL-
1244 PM EDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GULF AND
SOUTHEASTERN BAY COUNTIES WILL EXPIRE AT 1245 PM EDT/1145 AM CDT/...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small 
hail and gusty winds to 40 mph are still possible with these 
thunderstorms.

LAT...LON 2989 8548 2990 8548 2990 8551 2993 8557
      3003 8560 3015 8561 3020 8523 3002 8518
      2988 8526
TIME...MOT...LOC 1644Z 270DEG 27KT 3011 8535 3003 8530 2993 8537 

$$

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 1:48 AM CDTSpecial Marine WarningTAE57 min
Apr 9, 3:16 AM CDTSpecial Weather StatementTAEGulf44 min
Apr 9, 3:31 AM CDTSpecial Marine WarningTAE44 min
Apr 9, 3:44 AM CDTSevere Thunderstorm WarningTAEFranklin, Gulf, Liberty31 min
Apr 9, 4:15 AM CDTSevere Thunderstorm WarningTAEFranklin, Gulf45 min
Apr 9, 4:55 AM CDTSevere Thunderstorm WarningTAEFranklin35 min
Apr 9, 5:22 AM CDTSpecial Marine WarningTAE53 min
Apr 9, 5:31 AM CDTSpecial Weather StatementTAEFranklin44 min
Apr 9, 5:49 AM CDTSevere Thunderstorm WarningTAEBay, Calhoun, Jackson, Washington56 min
Apr 9, 6:07 AM CDTSpecial Marine WarningTAE113 min
Apr 9, 6:37 AM CDTSpecial Weather StatementTAELiberty38 min
Apr 9, 6:43 AM CDTSevere Thunderstorm WarningTAEBay, Calhoun, Jackson62 min
Apr 9, 6:48 AM CDTAreal Flood AdvisoryTAEBay, Gulf3 hr
Apr 9, 6:59 AM CDTSpecial Weather StatementTAEWalton46 min
Apr 9, 7:16 AM CDTSpecial Weather StatementTAEHolmes44 min
Apr 9, 7:18 AM CDTSpecial Weather StatementTAEGulf27 min
Apr 9, 7:34 AM CDTSevere Thunderstorm WarningTAEHolmes, Jackson, Washington43 min
Apr 9, 7:35 AM CDTSevere Thunderstorm WarningTAEJackson55 min
Apr 9, 7:54 AM CDTSpecial Marine WarningTAE2 hr
Apr 9, 8:31 AM CDTSpecial Marine WarningTAE3 hr
Apr 9, 9:22 AM CDTFlash Flood WarningTAEBay, Walton3 hr
Apr 9, 9:53 AM CDTSpecial Marine WarningTAE3 hr
Apr 9, 10:27 AM CDTSevere Thunderstorm WarningTAEBay48 min
Apr 9, 11:11 AM CDTFlash Flood WarningTAEBay, Gulf2 hr
Apr 9, 11:27 AM CDTSpecial Marine WarningTAE3 hr
Apr 9, 11:43 AM CDTSpecial Weather StatementTAEGulf47 min
Apr 9, 11:56 AM CDTSpecial Weather StatementTAEBay, Calhoun, Jackson, Liberty, Washington64 min
Apr 9, 12:39 PM CDTSpecial Weather StatementTAELiberty51 min
Apr 9, 2:07 PM CDTSmall Craft AdvisoryTAE29 hr
Apr 9, 2:28 PM CDTSpecial Marine WarningTAE2 hr
Apr 9, 4:42 PM CDTSpecial Weather StatementTAEBay, Calhoun, Gadsden, Gulf, Jefferson, Leon and 2 more48 min
Apr 9, 5:25 PM CDTSpecial Marine WarningTAE95 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning 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.