Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 49, NWS Tampa Bay, FL

July 22, 20124 counties in Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 22, 2012, 2:50 PM EDT for 4 counties in Florida. It was in force for 40 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 22, 2012, 2:50 PM EDT (18:50 UTC)
Expired
Jul 22, 2012, 3:30 PM EDT
In force
40 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon

Counties DeSoto County, FL, Hardee County, FL, Highlands County, FL, Polk County, FL

The radar

The Tampa radar (KTBW), 71 km from the middle of the area, began a volume at 18:53 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

Tampa Bay, FL (KTBW), launched 12:00Z, 6.8 hours before the alert went out and 71 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, Tampa Bay, FL at 12:00Z on 2012-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2174 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2012-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
2174 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
58 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.

737 
WUUS52 KTBW 221850
SVRTBW
FLC027-049-055-105-221930-
/O.NEW.KTBW.SV.W.0049.120722T1850Z-120722T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
250 PM EDT SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DESOTO COUNTY IN SOUTH CENTRAL FLORIDA...
  HARDEE COUNTY IN CENTRAL FLORIDA...
  HIGHLANDS COUNTY IN SOUTH CENTRAL FLORIDA...
  POLK COUNTY IN CENTRAL FLORIDA...

* UNTIL 330 PM EDT.

* AT 243 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM AVON PARK TO 11 MILES SOUTH OF SWEETWATER...OR ALONG A LINE
  EXTENDING FROM AVON PARK TO 12 MILES EAST OF ARCADIA...AND MOVING
  WEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WAUCHULA...ZOLFO SPRINGS...LIMESTONE...ONA...FORT MEADE AND FORT
  GREEN.

LAT...LON 2716 8160 2723 8206 2732 8206 2781 8192
      2771 8137
TIME...MOT...LOC 1850Z 101DEG 15KT 2764 8151 2726 8170

$$
3 follow-up statements
024 
WWUS52 KTBW 221904
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
304 PM EDT SUN JUL 22 2012

FLC027-049-055-105-221930-
/O.CON.KTBW.SV.W.0049.000000T0000Z-120722T1930Z/
DESOTO FL-HARDEE FL-HIGHLANDS FL-POLK FL-
304 PM EDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHERN POLK...NORTHWESTERN HIGHLANDS...HARDEE AND NORTHERN
DESOTO COUNTIES...

AT 257 PM EDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES
NORTHWEST OF AVON PARK EXECUTIVE AIRPORT TO BROWNVILLE...OR ALONG A
LINE EXTENDING FROM 9 MILES NORTHWEST OF AVON PARK TO 7 MILES EAST OF
ARCADIA...MOVING WEST AT 15 MPH.

LAT...LON 2739 8150 2716 8160 2723 8206 2733 8205
      2781 8192 2773 8147
TIME...MOT...LOC 1904Z 101DEG 15KT 2766 8166 2726 8179

$$
302 
WWUS52 KTBW 221914
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
314 PM EDT SUN JUL 22 2012

FLC055-221924-
/O.CAN.KTBW.SV.W.0049.000000T0000Z-120722T1930Z/
HIGHLANDS FL-
314 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HIGHLANDS COUNTY
IS CANCELLED...

LAT...LON 2772 8193 2768 8164 2744 8161 2716 8160
      2723 8206 2733 8205
TIME...MOT...LOC 1914Z 101DEG 15KT 2766 8180 2727 8189

$$

FLC027-049-105-221930-
/O.CON.KTBW.SV.W.0049.000000T0000Z-120722T1930Z/
DESOTO FL-HARDEE FL-POLK FL-
314 PM EDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHERN POLK...HARDEE AND NORTHERN DESOTO COUNTIES...

AT 307 PM EDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BOWLING
GREEN TO BROWNVILLE...OR ALONG A LINE EXTENDING FROM 8 MILES NORTH OF
WAUCHULA TO ARCADIA...MOVING WEST AT 15 MPH.

LAT...LON 2772 8193 2768 8164 2744 8161 2716 8160
      2723 8206 2733 8205
TIME...MOT...LOC 1914Z 101DEG 15KT 2766 8180 2727 8189

$$
002 
WWUS52 KTBW 221923
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
323 PM EDT SUN JUL 22 2012

FLC027-049-105-221933-
/O.EXP.KTBW.SV.W.0049.000000T0000Z-120722T1930Z/
DESOTO FL-HARDEE FL-POLK FL-
323 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN POLK...HARDEE AND
NORTHERN DESOTO COUNTIES WILL EXPIRE AT 330 PM EDT...

ALTHOUGH THE STORM HAS WEAKENED BELOW SEVERE LIMITS IT WILL CONTINUE 
TO PRODUCE STRONG GUSTY WINDS AND HEAVY RAIN. 

LAT...LON 2772 8193 2768 8164 2744 8161 2716 8160
      2723 8206 2733 8205
TIME...MOT...LOC 1923Z 101DEG 15KT 2768 8193 2728 8203

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 8:18 PM EDTSpecial Marine WarningTBW57 min
Jul 21, 8:21 PM EDTSpecial Weather StatementTBWCitrus, Hernando, Sumter54 min
Jul 21, 8:54 PM EDTSpecial Marine WarningTBW66 min
Jul 22, 2:41 PM EDTSpecial Weather StatementTBWDeSoto, Hardee49 min
Jul 22, 2:53 PM EDTSpecial Marine WarningTBW67 min
Jul 22, 2:54 PM EDTSpecial Weather StatementTBWCharlotte51 min
Jul 22, 3:01 PM EDTSpecial Weather StatementTBWPolk44 min
Jul 22, 3:17 PM EDTSpecial Weather StatementTBWHighlands43 min
Jul 22, 3:28 PM EDTSpecial Weather StatementTBWManatee, Polk, Sarasota47 min
Jul 22, 3:32 PM EDTSpecial Marine WarningTBW118 min
Jul 22, 3:43 PM EDTSevere Thunderstorm WarningTBWHillsborough, Pinellas32 min
Jul 22, 3:56 PM EDTSevere Thunderstorm WarningTBWHillsborough, Pinellas34 min
Jul 22, 4:08 PM EDTSevere Thunderstorm WarningTBWHillsborough, Pinellas37 min
Jul 22, 4:14 PM EDTSpecial Weather StatementTBWDeSoto, Hardee, Highlands, Polk46 min
Jul 22, 4:41 PM EDTSpecial Marine WarningTBW64 min
Jul 22, 4:55 PM EDTSpecial Marine WarningTBW95 min
Jul 22, 4:58 PM EDTSpecial Weather StatementTBWHillsborough47 min
Jul 22, 5:15 PM EDTSevere Thunderstorm WarningTBWHernando, Pasco, Pinellas30 min
Jul 22, 5:19 PM EDTSpecial Weather StatementTBWHillsborough41 min
Jul 22, 5:25 PM EDTSpecial Marine WarningTBW65 min
Jul 22, 5:30 PM EDTSpecial Weather StatementTBWCitrus, Hernando, Sumter60 min
Jul 22, 5:45 PM EDTSevere Thunderstorm WarningTBWHernando, Pasco21 min
Jul 22, 6:26 PM EDTSpecial Marine WarningTBW64 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.