Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 85, NWS Mobile, AL

July 22, 2018Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 22, 2018, 6:50 PM CDT for Santa Rosa County, Florida. It was in force for 26 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, 6:50 PM CDT (23:50 UTC)
Expired: Jul 22, 2018, 7:16 PM CDT
In force: 26 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 101 km from the middle of the area, began a volume at 23:55 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
Jul 22, 11:57 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.8 hours before the alert went out and 255 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: 3735 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

579 
WUUS54 KMOB 222350
SVRMOB
FLC113-230030-
/O.NEW.KMOB.SV.W.0085.180722T2350Z-180723T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
650 PM CDT SUN JUL 22 2018

The National Weather Service in Mobile has issued a

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

* Until 730 PM CDT.

* At 650 PM CDT, a severe thunderstorm was located near Bagdad,
  moving south at 20 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...
  Bagdad, Navarre and Navarre Beach. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3035 8702 3036 8699 3037 8697 3036 8702
      3062 8709 3066 8679 3039 8680 3037 8693
TIME...MOT...LOC 2350Z 340DEG 18KT 3055 8700 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

1 follow-up statement

623 
WWUS54 KMOB 230016
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
716 PM CDT SUN JUL 22 2018

FLC113-230026-
/O.CAN.KMOB.SV.W.0085.000000T0000Z-180723T0030Z/
Santa Rosa FL-
716 PM CDT SUN JUL 22 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SANTA ROSA COUNTY
IS CANCELLED...
                
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 has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3035 8702 3036 8699 3037 8697 3036 8702
      3062 8709 3066 8679 3039 8680 3037 8693
TIME...MOT...LOC 0015Z 340DEG 18KT 3043 8695 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 3:22 AM CDT	Rip Current Statement	MOB	Escambia, Okaloosa, Santa Rosa	24 hr
Jul 22, 6:14 PM CDT	Special Weather Statement	MOB	Santa Rosa	46 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning 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.