Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 166, NWS Mobile, AL

August 2, 2012Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Aug 2, 2012, 2:13 PM CDT for Santa Rosa County, Florida. It was in force for 15 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
Aug 2, 2012, 2:13 PM CDT (19:13 UTC)
Expired
Aug 2, 2012, 2:28 PM CDT
In force
15 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 100 km from the middle of the area, began a volume at 19:13 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.2 hours before the alert went out and 254 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, Tallahassee Rgnl, FL at 12:00Z on 2012-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2627 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, Tallahassee Rgnl, FL at 12:00Z on 2012-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.193958Sfc1 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
2627 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
7 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.

222 
WUUS54 KMOB 021913
SVRMOB
FLC113-022000-
/O.NEW.KMOB.SV.W.0166.120802T1913Z-120802T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
213 PM CDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN SANTA ROSA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 300 PM CDT

* AT 208 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 17 MILES NORTH
  OF MILTON...OR 8 MILES EAST OF WHITFIELD...AND MOVING SOUTHEAST AT
  5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHEASTERN SANTA ROSA COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

&&

LAT...LON 3098 8680 3076 8680 3077 8704 3099 8702
TIME...MOT...LOC 1913Z 303DEG 3KT 3086 8693

$$
1 follow-up statement
067 
WWUS54 KMOB 021928
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
228 PM CDT THU AUG 2 2012

FLC113-021938-
/O.CAN.KMOB.SV.W.0166.000000T0000Z-120802T2000Z/
SANTA ROSA FL-
228 PM CDT THU AUG 2 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
NORTHEASTERN SANTA ROSA COUNTY...

AT 228 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHEASTERN
SANTA ROSA COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3098 8680 3076 8680 3077 8704 3099 8702
TIME...MOT...LOC 1928Z 303DEG 3KT 3085 8692

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 1:02 PM CDTAreal Flood AdvisoryMOBEscambia118 min
Aug 2, 1:54 PM CDTSevere Thunderstorm WarningMOBEscambia36 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012

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.