Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 247, NWS Tallahassee, FL

June 29, 2009Bay County, Gulf County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 29, 2009, 4:45 PM CDT for Bay County, Gulf 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 counties it named.

The facts

Issued: Jun 29, 2009, 4:45 PM CDT (21:45 UTC)
Expired: Jun 29, 2009, 5:30 PM CDT
In force: 45 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Bay County, FL, Gulf County, FL

The radar

The Eglin Afb radar (KEVX), 71 km from the middle of the area, began a volume at 21:44 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, 9.8 hours before the alert went out and 116 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: 1205 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 977 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 3:37 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Jun 29, 3:37 PM CDT, 1 hour 8 minutes before

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Hazardous weather outlook, Jun 29, 4:35 AM CDT, 12 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
535 AM EDT MON JUN 29 2009

ALZ065>069-FLZ007>019-026>029-034-GAZ120>131-142>148-155>161-
GMZ730-750-755-765-770-775-301000-
COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-COASTAL WALTON-
HOLMES-WASHINGTON-JACKSON-BAY-CALHOUN-GULF-FRANKLIN-GADSDEN-LEON-
JEFFERSON-MADISON-LIBERTY-WAKULLA-TAYLOR-LAFAYETTE-DIXIE-QUITMAN-
CLAY-RANDOLPH-TERRELL-DOUGHERTY-LEE-WORTH-TURNER-TIFT-BEN HILL-
IRWIN-EARLY-MILLER-BAKER-MITCHELL-COLQUITT-COOK-BERRIEN-SEMINOLE-
DECATUR-GRADY-THOMAS-BROOKS-LOWNDES-LANIER-
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM-
COASTAL WATERS FROM APALACHICOLA TO DESTIN FL OUT 20 NM-
COASTAL WATERS FROM  OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO
20 NM-
COASTAL WATERS FROM  SUWANNEE RIVER TO KEATON BEACH OUT 20 NM-
WATERS FROM APALACHICOLA TO DESTIN FL FROM 20 TO 60 NM-
WATERS FROM  SUWANNEE RIVER TO APALACHICOLA FL FROM 20 TO 60 NM-
535 AM EDT MON JUN 29 2009 /435 AM CDT MON JUN 29 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA...SOUTHWEST
AND SOUTH CENTRAL GEORGIA...THE FLORIDA BIG BEND AND PANHANDLE...AND
ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT...
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP TODAY
AS THE SEA BREEZE MOVES INLAND AND A WEAK COLD FRONT MOVES SOUTH
INTO SOUTHERN ALABAMA AND GEORGIA. THERE IS THE POTENTIAL FOR SOME
OF THE STRONGER STORMS TO PRODUCE WIND GUSTS OF 40 TO 50 MPH...SMALL
HAIL...LOCALLY HEAVY RAIN AND FREQUENT LIGHTNING DURING THE AFTERNOON
AND EVENING. A FEW SEVERE STORMS ARE ALSO POSSIBLE. THERE IS A
MODERATE RISK OF RIP CURRENTS ALONG THE BEACHES OF THE FLORIDA
PANHANDLE DUE TO A SMALL SWELL AND INCREASING SOUTHWESTERLY WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...
THE FRONT WILL SLIP SOUTH INTO THE NORTHEAST GULF AND NORTH FLORIDA
BY WEDNESDAY. DRIER AIR WILL FILTER INTO ALABAMA...GEORGIA AND
NORTHERN PORTIONS OF THE PANHANDLE AND BIG BEND. RAIN CHANCES
TUESDAY WILL BE HIGHEST ACROSS THE BIG BEND...WITH ONLY SLIGHT
CHANCES IN THE SOUTHEAST BIG BEND ON WEDNESDAY. A RETURN TO TYPICAL
AFTERNOON AND EARLY EVENING SHOWERS AND THUNDERSTORMS IS EXPECTED
FOR THE END OF THE WEEK INTO THE UPCOMING WEEKEND.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.
SPOTTERS SHOULD CONSIDER THEMSELVES ACTIVATED IF A WATCH OR WARNING
IS ISSUED FOR THEIR AREA.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
WEBSITE ON THE INTERNET AT WEATHER.GOV...THEN CLICK ON YOUR AREA
OF INTEREST ON THE NATIONAL MAP.

8-JAMSKI

In the hours before

Local storm report, Jun 29, 3:21 PM CDT, 1 hour 24 minutes before

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Special weather statement, Jun 29, 3:32 PM CDT, 1 hour 13 minutes before

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Local storm report, Jun 29, 3:44 PM CDT, 1 hour 1 minute before

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Local storm report, Jun 29, 4:05 PM CDT, 40 minutes before

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Special weather statement, Jun 29, 4:18 PM CDT, 27 minutes before

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Special weather statement, Jun 29, 4:22 PM CDT, 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 7:09 PM CDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Leon, Liberty, Wakulla	51 min
Jun 28, 7:13 PM CDT	Flash Flood Warning	TAE	Leon	92 min
Jun 28, 7:13 PM CDT	Special Marine Warning	TAE		62 min
Jun 28, 7:15 PM CDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon, Wakulla	60 min
Jun 28, 7:26 PM CDT	Tornado Warning	TAE	Wakulla	34 min
Jun 28, 8:04 PM CDT	Special Marine Warning	TAE		116 min
Jun 28, 10:03 PM CDT	Special Marine Warning	TAE		57 min
Jun 29, 12:07 PM CDT	Special Marine Warning	TAE		53 min
Jun 29, 12:24 PM CDT	Special Marine Warning	TAE		66 min
Jun 29, 2:13 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	47 min
Jun 29, 2:30 PM CDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	39 min
Jun 29, 3:19 PM CDT	Fire Weather Watch	TAE	Calhoun, Gadsden, Holmes, Jackson, Leon, Walton and 1 more	13 hr
Jun 29, 4:36 PM CDT	Special Marine Warning	TAE		54 min
Jun 29, 5:20 PM CDT	Special Marine Warning	TAE		85 min
Jun 29, 12:58 PM CDT	Severe Thunderstorm Warning	TAE	Colquitt, Mitchell	31 min
Jun 29, 3:06 PM CDT	Severe Thunderstorm Warning	TAE	Lowndes	24 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009 Every severe thunderstorm warning in 2009

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.