Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Tallahassee, FL

January 11, 2012Bay County, Walton County, Washington County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jan 11, 2012, 1:43 AM CST for Bay County, Walton County, Washington County, Florida. It was in force for 45 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
Jan 11, 2012, 1:43 AM CST (07:43 UTC)
Expired
Jan 11, 2012, 2:28 AM CST
In force
45 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Bay County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 42 km from the middle of the area, began a volume at 07:42 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 00:00Z, 7.7 hours before the alert went out and 140 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 00:00Z on 2012-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 00:00Z on 2012-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.1939587897Sfc1 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
13 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
654 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
83 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.

336 
WUUS52 KTAE 110743
SVRTAE
FLC005-131-133-110845-
/O.NEW.KTAE.SV.W.0001.120111T0743Z-120111T0845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
143 AM CST WED JAN 11 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BAY COUNTY IN THE PANHANDLE OF FLORIDA...  
  SOUTHERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...              
  SOUTHERN WASHINGTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 245 AM CST

* AT 138 AM CST...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED 16 MILES SOUTHWEST OF PANAMA CITY     
  BEACH...OR 16 MILES SOUTHWEST OF GULF RESORT BEACH...AND WAS       
  MOVING NORTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TYNDALL AFB...PANAMA CITY...CALLAWAY...SPRINGFIELD...HILAND PARK
  AND LYNN HAVEN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3052 8604 3045 8570 3020 8539 3008 8550
      3008 8552 3007 8552 3001 8557 3005 8560
      3009 8570 3021 8588 3027 8600 3031 8614
TIME...MOT...LOC 0742Z 213DEG 29KT 3005 8600

$$

17-GOULD
1 follow-up statement
486 
WWUS52 KTAE 110828
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
228 AM CST WED JAN 11 2012

FLC005-131-133-110838-
/O.CAN.KTAE.SV.W.0001.000000T0000Z-120111T0845Z/
BAY FL-WASHINGTON FL-WALTON FL-
228 AM CST WED JAN 11 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WALTON...
SOUTHERN WASHINGTON AND SOUTHERN BAY COUNTIES IS CANCELLED...

RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3052 8604 3045 8570 3020 8539 3008 8550
      3008 8552 3007 8552 3001 8557 3005 8560
      3009 8570 3021 8588 3027 8600 3031 8614
TIME...MOT...LOC 0828Z 213DEG 29KT 3036 8577

$$

17-GOULD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 11, 12:57 AM CSTSpecial Marine WarningTAE2 hr
Jan 11, 1:04 AM CSTSpecial Weather StatementTAEWalton56 min
Jan 11, 1:12 AM CSTRip Current StatementTAEBay, Franklin, Gulf, Walton53 hr
Jan 11, 1:12 AM CSTHigh Surf AdvisoryTAEBay, Gulf, Walton25 hr
Jan 11, 5:38 AM CSTSevere Thunderstorm WarningTAELeon, Wakulla24 min
Jan 11, 5:40 AM CSTSpecial Marine WarningTAE25 min
Jan 11, 7:03 AM CSTSpecial Marine WarningTAE87 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.