Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 128, NWS Mobile, AL

June 13, 2011Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jun 13, 2011, 6:36 PM CDT for Santa Rosa County, Florida. It was in force for 39 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 13, 2011, 6:36 PM CDT (23:36 UTC)
Expired: Jun 13, 2011, 7:15 PM CDT
In force: 39 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 110 km from the middle of the area, began a volume at 23:38 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 13, 6:39 PM CDT	HAIL 1	Bagdad, FL	PUBLIC REPORT OF QUARTER SIZE HAIL IN BAGDAD.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.6 hours before the alert went out and 252 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: 785 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1061 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

738 
WUUS54 KMOB 132336
SVRMOB
FLC113-140015-
/O.NEW.KMOB.SV.W.0128.110613T2336Z-110614T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
636 PM CDT MON JUN 13 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SANTA ROSA COUNTY IN NORTHWEST FLORIDA...
  THIS INCLUDES THE CITIES OF...PACE...MILTON...BAGDAD...

* UNTIL 715 PM CDT

* AT 634 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES NORTHWEST OF MILTON...OR
  NEAR MILTON NEAR WHITIN...AND MOVING SOUTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MILTON AROUND 655 PM CDT...
  PACE AND BAGDAD AROUND 705 PM CDT...
  AVALON BEACH AROUND 715 PM CDT...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 20 AND 29.

&&

LAT...LON 3051 8703 3055 8701 3055 8703 3051 8704
      3051 8710 3054 8714 3058 8715 3058 8717
      3056 8717 3056 8721 3061 8725 3080 8720
      3079 8700 3050 8699
TIME...MOT...LOC 2337Z 003DEG 14KT 3070 8711

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 3:17 PM CDT	Heat Advisory	MOB		13 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.