Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 180, NWS Tallahassee, FL

August 31, 2008Gadsden County, Leon County, Liberty County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 31, 2008, 2:08 PM EDT for Gadsden County, Leon County, Liberty County, Florida. It was in force for 37 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
Aug 31, 2008, 2:08 PM EDT (18:08 UTC)
Expired
Aug 31, 2008, 2:45 PM EDT
In force
37 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Gadsden County, FL, Leon County, FL, Liberty County, FL

The radar

The Tallahassee radar (KTLH), 25 km from the middle of the area, began a volume at 17:58 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, 6.1 hours before the alert went out and 28 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 2008-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1552 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, Tallahassee Rgnl, FL at 12:00Z on 2008-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
1552 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

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 Aug 31, 10:13 AM EDT, 3 hours 55 minutes earlier.

Area forecast discussion, Aug 31, 10:13 AM EDT, 3 hours 55 minutes before
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Hazardous weather outlook, Aug 31, 6:53 AM EDT, 7 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
653 AM EDT SUN AUG 31 2008

ALZ065>069-FLZ007>019-026>029-034-GAZ120>131-142>148-155>161-
GMZ730-750-755-765-770-775-011000-
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-
653 AM EDT SUN AUG 31 2008 /553 AM CDT SUN AUG 31 2008/

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

...A TROPICAL STORM WARNING IS IN EFFECT FROM THE OCHLOCKONEE RIVER
WEST ALONG THE PANHANDLE COAST...

HURRICANE GUSTAV IS FORECAST TO TRACK STEADILY NORTHWESTWARD FROM
THE SOUTHEAST GULF OF MEXICO THIS MORNING TO A LANDFALL ALONG THE
SOUTH CENTRAL OR SOUTHEASTERN LOUISIANA COAST BY LABOR DAY
AFTERNOON.

.DAY ONE...TODAY AND TONIGHT...
TROPICAL STORM FORCE WINDS ARE EXPECTED TO ARRIVE LATE TODAY
ACROSS THE GULF COASTAL WATERS SOUTH OF THE PANHANDLE AND CONTINUE
THROUGH TONIGHT. THESE SUSTAINED WINDS ARE EXPECTED PRIMARILY OVER
THE OPEN GULF WATERS. WHILE IMMEDIATE COASTAL AREAS IN THE WARNED
AREA COULD ALSO SEE TROPICAL STORM FORCE WINDS TONIGHT...THESE
WILL MOST LIKELY BE IN FREQUENT GUSTS.

EASTERLY WIND WAVES AND SOUTHERLY SWELLS WILL INCREASE ACROSS THE
GULF WATERS AND RESULT IN AN INCREASINGLY HIGH SURF AND RIP
CURRENT RISK. SMALL CRAFT ARE ENCOURAGED TO REMAIN IN PORT AND
SWIMMERS AT AREA BEACHES SHOULD STAY OUT OF THE WATER.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...
TROPICAL STORM CONDITIONS SHOULD CONTINUE INTO MONDAY IN THE
WARNED AREA...MAINLY IN GUSTS ALONG THE COAST....BUT WILL DIMINISH
ONCE GUSTAV MAKES LANDFALL. THE ENTIRE FORECAST AREA WILL FIND
ITSELF IN THE FAVORABLE RIGHT FRONT QUADRANT OF THIS HURRICANE AS
IT APPROACHES THE NORTH CENTRAL GULF COAST...SO THERE IS A THREAT
OF ISOLATED TORNADOES...MAINLY FROM LATE TONIGHT THROUGH MUCH OF
MONDAY. AN EXTREME RISK FOR RIP CURRENTS IS FORECAST FOR LABOR
DAY DUE TO VERY HIGH SURF. EVEN EXPERIENCED SWIMMERS AND SURFERS
SHOULD REFRAIN FROM ENTERING THE WATER. IN ADDITION...BATTERING
WAVES ARE EXPECTED TO RESULT IN BEACH EROSION. THESE CONDITIONS
WILL GRADUALLY SUBSIDE MONDAY NIGHT INTO TUESDAY. FAIRLY BENIGN
WEATHER IS FORECAST FROM TUESDAY NIGHT THROUGH THE END OF THE
WEEK. AT THIS TIME...STORM SURGE AND INLAND FLOODING FROM GUSTAV
ARE NOT CONSIDERED TO BE A SIGNIFICANT THREAT.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS MAY NEED TO BE ACTIVATED LATE TONIGHT THROUGH MONDAY
EVENING DUE TO THE POTENTIAL TORNADO THREAT.

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.

18-WOOL

In the hours before

Special weather statement, Aug 31, 1:45 PM EDT, 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
145 PM EDT SUN AUG 31 2008

FLZ017-018-311830-
JEFFERSON-LEON-
145 PM EDT SUN AUG 31 2008

...A SIGNIFICANT WEATHER ALERT IS IN EFFECT FOR JEFFERSON AND LEON
COUNTIES IN THE FLORIDA BIG BEND...

* UNTIL 230 PM EDT

AT 141 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 14 MILES NORTHEAST OF WOODVILLE...OR 14 MILES
SOUTHWEST OF MONTICELLO...MOVING WEST AT 37 MPH.

THIS STORM WILL BE NEAR...
  TALLAHASSEE BY 205 PM EDT.

WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

RELAY REPORTS OF SIGNIFICANT 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.

17-GOULD
Special weather statement, Aug 31, 1:47 PM EDT, 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
147 PM EDT SUN AUG 31 2008

FLZ009>011-311845-
HOLMES-JACKSON-WASHINGTON-
1247 PM CDT SUN AUG 31 2008

...A SIGNIFICANT WEATHER ALERT IS IN EFFECT FOR HOLMES...JACKSON AND
WASHINGTON COUNTIES IN THE PANHANDLE OF FLORIDA...

* UNTIL 145 PM CDT

AT 1245 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES SOUTHEAST OF MARIANNA...MOVING WEST AT 40
MPH.

THIS STORM WILL BE NEAR...
  4 MILES SOUTH OF MARIANNA BY 1255 PM CDT.
  CHIPLEY BY 120 PM CDT.
  BONIFAY BY 135 PM CDT.

PEOPLE IN HOLMES...JACKSON AND WASHINGTON COUNTIES...INCLUDING THE
CITIES OF MARIANNA...CHIPLEY AND BONIFAY...SHOULD MONITOR THE
WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE
PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

WINDS 50 TO 55 MPH ARE EXPECTED WITH THIS STORM.

ALSO...THIS STORM IS CAPABLE OF PRODUCING TORRENTIAL DOWNPOURS WHICH
MAY CAUSE LOCALIZED FLOODING OF STREETS AND LOW LYING AREAS.

RELAY REPORTS OF SIGNIFICANT 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.

38-GODSEY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 6:30 AM EDTTropical Storm WarningTAEBay, Franklin, Gulf, Walton29 hr
Aug 31, 12:29 PM EDTCoastal Flood AdvisoryTAEBay, Dixie, Jefferson, Taylor, Wakulla, Walton33 hr
Aug 31, 2:50 PM EDTSevere Thunderstorm WarningTAECalhoun, Gadsden, Jackson, Liberty40 min
Aug 31, 3:31 PM EDTSevere Thunderstorm WarningTAEHolmes, Jackson, Washington44 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008Every severe thunderstorm warning in 2008

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.