Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 172, NWS Mobile, AL

July 29, 2021Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 29, 2021, 6:50 PM CDT for Escambia County, Santa Rosa County, Florida. It was in force for 55 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 29, 2021, 6:50 PM CDT (23:50 UTC)
Expired
Jul 29, 2021, 7:45 PM CDT
In force
55 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 23:52 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.8 hours before the alert went out and 232 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, Slidell Radar S, LA at 12:00Z on 2021-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2497 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, Slidell Radar S, LA at 12:00Z on 2021-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
2497 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
565 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

931 
WUUS54 KMOB 292350
SVRMOB
FLC033-113-300045-
/O.NEW.KMOB.SV.W.0172.210729T2350Z-210730T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
650 PM CDT Thu Jul 29 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  West central Santa Rosa County in northwestern Florida...
  North central Escambia County in northwestern Florida...

* Until 745 PM CDT.

* At 650 PM CDT, a severe thunderstorm was located over Point Baker,
  or 5 miles northwest of Milton, moving west at 15 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Milton, Bagdad, Molino and Point Baker. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3063 8739 3065 8740 3066 8740 3067 8741
      3069 8744 3070 8745 3071 8745 3091 8740
      3077 8697 3059 8702
TIME...MOT...LOC 2350Z 103DEG 13KT 3070 8708 

HAIL...0.75IN
WIND...60MPH
 
$$
2 follow-up statements
755 
WWUS54 KMOB 300019
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
719 PM CDT Thu Jul 29 2021

FLC033-113-300045-
/O.CON.KMOB.SV.W.0172.000000T0000Z-210730T0045Z/
Santa Rosa FL-Escambia FL-
719 PM CDT Thu Jul 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR WEST CENTRAL SANTA ROSA AND NORTH CENTRAL ESCAMBIA COUNTIES...

At 718 PM CDT, a severe thunderstorm was located 6 miles east of
Molino, or 8 miles north of Pace, moving west at 15 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Molino.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3063 8739 3065 8740 3066 8740 3067 8741
      3069 8744 3070 8745 3071 8745 3091 8740
      3080 8706 3060 8710
TIME...MOT...LOC 0018Z 103DEG 13KT 3072 8720 

HAIL...0.75IN
WIND...60MPH
 
$$
983 
WWUS54 KMOB 300041
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
741 PM CDT Thu Jul 29 2021

FLC033-113-300049-
/O.EXP.KMOB.SV.W.0172.000000T0000Z-210730T0045Z/
Santa Rosa FL-Escambia FL-
741 PM CDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SANTA ROSA AND
NORTH CENTRAL ESCAMBIA COUNTIES WILL EXPIRE AT 745 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty 
winds are still possible with this thunderstorm. Other strong storms 
were noted southward from near Gonzalez to Pensacola and these will 
be capable of producing 40 to 50 mph winds as they move eastward. 

LAT...LON 3063 8739 3065 8740 3066 8740 3067 8741
      3069 8744 3070 8745 3071 8745 3091 8740
      3080 8706 3060 8710
TIME...MOT...LOC 0039Z 103DEG 13KT 3074 8728 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 8:18 PM CDTAreal Flood AdvisoryMOBEscambia3 hr
Jul 29, 2:54 AM CDTExcessive Heat WatchMOBEscambia, Okaloosa, Santa Rosa11 hr
Jul 29, 2:16 PM CDTExcessive Heat WatchMOBEscambia, Okaloosa, Santa Rosa14 hr
Jul 29, 2:16 PM CDTExcessive Heat WarningMOBEscambia, Okaloosa, Santa Rosa29 hr
Jul 29, 4:57 PM CDTSpecial Weather StatementMOBOkaloosa33 min
Jul 29, 5:33 PM CDTSpecial Weather StatementMOBSanta Rosa42 min
Jul 29, 6:21 PM CDTSpecial Weather StatementMOBEscambia, Santa Rosa39 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.