Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 149, NWS Mobile, AL

June 17, 2016Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jun 17, 2016, 6:53 PM CDT for Okaloosa County, Florida. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 17, 2016, 6:53 PM CDT (23:53 UTC)
Expired: Jun 17, 2016, 8:00 PM CDT
In force: 67 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 71 km from the middle of the area, began a volume at 23:56 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.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 7:30 PM CDT	TSTM WND DMG	Crestview, FL	COUNTY 911 COMMUNICATIONS REPORTS NUMEROUS TREES DOWN COUNTY WIDE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 17, 12:37 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.9 hours before the alert went out and 228 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: 2713 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

353 
WUUS54 KMOB 172353
SVRMOB
FLC091-180100-
/O.NEW.KMOB.SV.W.0149.160617T2353Z-160618T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
653 PM CDT FRI JUN 17 2016

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKALOOSA COUNTY IN NORTHWESTERN FLORIDA...

* UNTIL 800 PM CDT

* AT 652 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR NEW BROCKTON TO NEAR LAUREL HILL TO 8 MILES
  SOUTHEAST OF RIVERVIEW...MOVING SOUTHEAST AT 50 MPH. WIND DAMAGE
  WILL LIKELY OCCUR ALONG A GUST FRONT AHEAD OF THE RAIN AND
  LIGHTNING AND WILL CONTINUE WITH THE THUNDERSTORMS THAT FOLLOW. 

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  CRESTVIEW...NICEVILLE...VALPARAISO...BAKER AND LAUREL HILL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THESE STORMS WILL OCCUR BEFORE ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3050 8678 3053 8680 3100 8679 3099 8639
      3050 8639
TIME...MOT...LOC 2352Z 313DEG 44KT 3134 8596 3097 8642 3095 8700 

HAIL...0.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 8:19 PM CDT	Special Weather Statement	MOB	Escambia	26 min
Jun 16, 8:59 PM CDT	Special Weather Statement	MOB	Escambia	31 min
Jun 16, 9:05 PM CDT	Special Weather Statement	MOB	Okaloosa	25 min
Jun 17, 6:24 PM CDT	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	66 min

Nearby

Severe Thunderstorm Warnings in Florida, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.