Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 69, NWS Mobile, AL

July 15, 2018Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 15, 2018, 4:01 PM CDT for Santa Rosa 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 15, 2018, 4:01 PM CDT (21:01 UTC)
Expired: Jul 15, 2018, 4:45 PM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 98 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 246 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: 1875 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

144 
WUUS54 KMOB 152101
SVRMOB
FLC113-152145-
/O.NEW.KMOB.SV.W.0069.180715T2101Z-180715T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
401 PM CDT SUN JUL 15 2018

The National Weather Service in Mobile has issued a

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

* Until 445 PM CDT.

* At 400 PM CDT, a severe thunderstorm was located 5 miles southwest
  of Jay, or 7 miles southeast of Century, and is nearly stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Jay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3088 8729 3089 8728 3091 8729 3091 8728
      3092 8727 3098 8715 3085 8711 3081 8721
TIME...MOT...LOC 2100Z 132DEG 3KT 3088 8719 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:53 PM CDT	Special Weather Statement	MOB	Santa Rosa	52 min
Jul 15, 5:04 PM CDT	Areal Flood Advisory	MOB	Okaloosa	3 hr
Jul 15, 5:24 PM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	3 hr

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.