Alert archive / Florida / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 174, NWS Tallahassee, FL
NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 13, 2008, 6:51 AM CDT for Bay County, Walton County, Washington County, Florida. It was in force for 39 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 13, 2008, 6:51 AM CDT (11:51 UTC)
- Expired
- Aug 13, 2008, 7:30 AM CDT
- In force
- 39 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), 13 km from the middle of the area, began a volume at 11:50 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 13, 3:02 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 11.9 hours before the alert went out and 146 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.
- Mixed-layer CAPE
- 512 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 755 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 13, 3:56 AM CDT, 2 hours 55 minutes earlier.
Area forecast discussion, Aug 13, 3:56 AM CDT, 2 hours 55 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE TALLAHASSEE FL 455 AM EDT WED 13 208 ***A TORNADO WATCH HAS BEEN ISSUED FOR OUR ENTIRE CWA UNTIL NOON EDT. ALL ZONES INCLUDE SEVERE WEATHER WORDING FOR FIRST PERIOD. CORRECTED WWA SECTION TO INCLUDE ALL MARINE ZONES IN THE SCA. *** ...................... .SYNOPSIS...THE SQUALL LINE WEAKENED AS IT MOVED INTO OUR CWA LATE LAST NIGHT/EARLY THIS MORNING. A FEW LOCATIONS SAW BRIEF GUSTY WINDS JUST OVER 30 KNOTS AND SEVERAL AREAS RECEIVED HEAVY DOWNPOURS. HOWEVER...SO FAR NO FLOODING ISSUES AS THE CONVECTIVE LINE PROGRESSED STEADILY TO THE EAST WITH NO APPRECIABLE ECHO TRAINING. AS OF 07Z...THE NARROW BAND OF MODERATE TO HEAVY RAIN WAS ALONG A VALDOSTA TO ST. MARKS LINE. SCATTERED CONVECTION EXTENDED WESTWARD ACROSS THE REMAINDER OF OUR CWA. && .SHORT TERM...(TODAY THROUGH FRIDAY)...THE STRONG SHORTWAVE AND SURFACE LOW CURRENTLY MOVING INTO WEST CENTRAL ALABAMA WILL MOVE EAST INTO COASTAL SOUTH CAROLINA EARLY THIS AFTERNOON AND THEN RACE TO THE NORTHEAST ON THURSDAY. AS THE SURFACE LOW LIFTS OUT...IT WILL DRAG THE COLD FRONT ACR
Hazardous weather outlook, Aug 13, 4:53 AM CDT, 1 hour 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TALLAHASSEE FL 553 AM EDT WED AUG 13 2008 ALZ065>069-FLZ007>019-026>029-034-GAZ120>131-142>148-155>161- GMZ730-750-755-765-770-775-141000- 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- 553 AM EDT WED AUG 13 2008 /453 AM CDT WED AUG 13 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA... SOUTHWEST AND SOUTH CENTRAL GEORGIA...AND THE FLORIDA BIG BEND AND PANHANDLE...AND ADJACENT COASTAL WATERS. ...TORNADO WATCH 824 IN EFFECT UNTIL 12 NOON EDT /11 AM CDT/ THIS MORNING... ...LAKE WIND ADVISORY IN EFFECT FROM 8 AM EDT /7 AM CDT/ THIS MORNING TO 8 PM EDT /7 PM CDT/ THIS EVENING... ...HIGH SURF ADVISORY IN EFFECT FROM 11 AM EDT /10 AM CDT/ THIS MORNING TO 4 AM EDT /3 AM CDT/ THURSDAY... .DAY ONE...TODAY AND TONIGHT... NUMEROUS SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A STRONG LOW PRESSURE SYSTEM WILL SWEEP FROM WEST TO EAST ACROSS THE AREA THIS MORNING...BECOMING LESS NUMEROUS IN THE AFTERNOON. SOME OF THE STORMS MAY BE SEVERE WITH DAMAGING WINDS AND EVEN AN ISOLATED TORNADO IS POSSIBLE. THUS...A TORNADO WATCH HAS BEEN ISSUED AND IS IN EFFECT FOR THE ENTIRE TRI-STATE REGION UNTIL 12 NOON EDT. WINDS WILL BE BREEZY TODAY AND A LAKE WIND ADVISORY IS IN EFFECT THIS AFTERNOON UNTIL EARLY EVENING. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE ENTIRE MARINE AREA AS WELL AS A HIGH SURF ADVISORY ALONG THE PANHANDLE COASTAL COUNTIES INCLUDING FRANKLIN COUNTY UNTIL EARLY THURSDAY MORNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... A MORE TYPICAL SUMMERTIME PATTERN IS EXPECTED THURSDAY INTO EARLY NEXT WEEK...WITH SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. WINDS AND SEAS WILL ALSO DIMINISH ACROSS THE MARINE AREA THURSDAY AND REMAIN LOW AT LEAST THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD CONSIDER THEMSELVES ACTIVATED AT LEAST UNTIL 12 NOON EDT TODAY. 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. BARRY
In the hours before
Special weather statement, Aug 13, 6:14 AM CDT, 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 714 AM EDT WED AUG 13 2008 FLZ012>014-131145- BAY-CALHOUN-GULF- 614 AM CDT WED AUG 13 2008 ...A SIGNIFICANT WEATHER ALERT IS IN EFFECT FOR BAY...CALHOUN AND GULF COUNTIES... * UNTIL 645 AM CDT AT 611 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 10 MILES NORTHEAST OF CALLAWAY...MOVING EAST AT 44 MPH. WINDS 40 TO 50 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. 12-WATSON
Special weather statement, Aug 13, 6:47 AM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 747 AM EDT WED AUG 13 2008 FLZ008-010-012-131230- BAY-COASTAL WALTON-WASHINGTON- 647 AM CDT WED AUG 13 2008 ...SIGNIFICANT WEATHER ALERT IN EFFECT FOR BAY...WALTON AND WASHINGTON COUNTIES... * UNTIL 730 AM CDT AT 648 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES SOUTHWEST OF DE FUNIAK SPRINGS TO 20 MILES SOUTH OF SANTA ROSA BEACH...MOVING EAST AT 45 MPH. THESE STORMS WILL BE NEAR... LOWER GRAND LAGOON BY 715 AM CDT. UPPER GRAND LAGOON BY 720 AM CDT. SPRINGFIELD BY 725 AM CDT. WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS. ALSO...THESE STORMS ARE 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. 8-JAMSKI
The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 11:50 PM CDT | Special Marine Warning | TAE | 13 hr | |
| Aug 13, 1:43 AM CDT | High Surf Advisory | TAE | Bay, Franklin, Gulf, Walton | 32 hr |
| Aug 13, 3:24 AM CDT | Areal Flood Advisory | TAE | Bay | 2 hr |
| Aug 13, 3:58 AM CDT | Lake Wind Advisory | TAE | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more | 14 hr |
| Aug 13, 6:35 AM CDT | Special Marine Warning | TAE | 55 min | |
| Aug 13, 7:33 AM CDT | Severe Thunderstorm Warning | TAE | Bay, Calhoun, Gulf, Liberty | 27 min |
| Aug 13, 9:12 AM CDT | River Flood Warning | TAE | Wakulla | 5 days |
| Aug 13, 10:02 AM CDT | Special Marine Warning | TAE | 58 min | |
| Aug 13, 11:00 AM CDT | Special Marine Warning | TAE | 60 min | |
| Aug 13, 11:47 AM CDT | Special Marine Warning | TAE | 58 min | |
| Aug 13, 11:52 AM CDT | Special Marine Warning | TAE | 83 min | |
| Aug 13, 12:59 PM CDT | Special Marine Warning | TAE | 91 min | |
| Aug 13, 2:35 PM CDT | Special Marine Warning | TAE | 115 min | |
| Aug 13, 8:38 AM CDT | Areal Flood Advisory | TAE | Clay | 52 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.