Alert archive / Georgia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 30, NWS Tallahassee, FL

February 17, 2008Decatur County, Seminole County, Georgia; Gadsden County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 17, 2008, 10:33 PM EST for Decatur County, Seminole County, Georgia; Gadsden County, Florida. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 17, 2008, 10:33 PM EST (03:33 UTC)
Expired: Feb 17, 2008, 11:30 PM EST
In force: 57 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Gadsden County, FL, Decatur County, GA, Seminole County, GA

The radar

The Tallahassee radar (KTLH), 62 km from the middle of the area, began a volume at 03:32 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.

What was reported inside it

Time	Report	Where	Remark
Feb 17, 10:54 PM EST	TSTM WND DMG	5 Wnw Bainbridge, GA	A FEW TREES AND POWERLINES REPORTED DOWN WEST OF BAINBRIDGE NEAR DOTHAN ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 17, 6:58 PM EST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 3.6 hours before the alert went out and 64 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: 593 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 274 m²/s²
0-3 km storm-relative helicity: 290 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KTAE 180334
SVRTAE
FLC039-GAC087-253-180430-
/O.NEW.KTAE.SV.W.0030.080218T0333Z-080218T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1033 PM EST SUN FEB 17 2008

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN GADSDEN COUNTY IN FLORIDA...
  DECATUR COUNTY IN SOUTHWEST GEORGIA...
  THIS INCLUDES THE CITY OF BAINBRIDGE...
  SOUTHERN SEMINOLE COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 1130 PM EST

* AT 927 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR CHATTAHOOCHEE...OR 20 MILES
  NORTHEAST OF BLOUNTSTOWN...AND WAS MOVING NORTHEAST AT 65 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BAINBRIDGE AND 6 MILES SOUTHEAST OF WEST BAINBRIDGE BY 1050 PM
  EST...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

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 3104 8449 3073 8437 3060 8489 3072 8487
      3076 8491 3080 8493 3083 8492 3105 8469
TIME...MOT...LOC 0333Z 244DEG 57KT 3074 8479

$$

17-GOULD

1 follow-up statement

000 
WWUS52 KTAE 180355
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1054 PM EST SUN FEB 17 2008

FLC039-GAC253-180404-
/O.CAN.KTAE.SV.W.0030.000000T0000Z-080218T0430Z/
GADSDEN FL-SEMINOLE GA-
1054 PM EST SUN FEB 17 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SEMINOLE AND
NORTHWESTERN GADSDEN 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST MONDAY MORNING FOR
SOUTHWEST AND SOUTH CENTRAL GEORGIA.

LAT...LON 3072 8439 3071 8441 3072 8468 3093 8470
      3105 8460 3104 8449
TIME...MOT...LOC 0354Z 241DEG 46KT 3086 8458

$$

GAC087-180430-
/O.CON.KTAE.SV.W.0030.000000T0000Z-080218T0430Z/
DECATUR GA-
1054 PM EST SUN FEB 17 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EST
FOR CENTRAL DECATUR COUNTY...

AT 1049 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR HALES LANDING...OR 7
MILES SOUTHWEST OF BAINBRIDGE...MOVING NORTHEAST AT 50 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BIG SLOUGH BOAT LANDING AND 9 MILES SOUTHEAST OF STEINHAM STORE BY
  1100 PM EST...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3072 8439 3071 8441 3072 8468 3093 8470
      3105 8460 3104 8449
TIME...MOT...LOC 0354Z 241DEG 46KT 3086 8458

$$

17-GOULD

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 17, 7:32 PM EST	Tornado Warning	TAE	Clay	43 min
Feb 17, 9:06 PM EST	Severe Thunderstorm Warning	TAE	Decatur, Grady	39 min
Feb 18, 1:06 AM EST	Tornado Warning	TAE	Decatur	39 min
Feb 18, 1:06 AM EST	Tornado Warning	TAE	Decatur	39 min
Feb 18, 1:33 AM EST	Tornado Warning	TAE	Grady	42 min
Feb 18, 2:01 AM EST	Tornado Warning	TAE	Colquitt, Grady, Mitchell, Thomas	44 min
Feb 18, 2:37 AM EST	Tornado Warning	TAE	Colquitt, Tift, Worth	38 min
Feb 18, 3:43 PM EST	Red Flag Warning	TAE	Baker, Ben Hill, Calhoun, Clay, Colquitt, Decatur and 15 more	27 hr
Feb 17, 7:05 PM EST	Severe Thunderstorm Warning	TAE	Jackson, Washington	40 min
Feb 17, 7:18 PM EST	Special Marine Warning	TAE		117 min
Feb 17, 7:48 PM EST	Severe Thunderstorm Warning	TAE	Bay	57 min
Feb 17, 9:18 PM EST	Special Marine Warning	TAE		117 min
Feb 17, 10:03 PM EST	Severe Thunderstorm Warning	TAE	Bay, Calhoun	42 min
Feb 17, 10:23 PM EST	Special Marine Warning	TAE		2 hr
Feb 18, 12:18 AM EST	Special Marine Warning	TAE		117 min
Feb 18, 1:46 AM EST	Severe Thunderstorm Warning	TAE	Gulf	44 min
Feb 18, 2:25 AM EST	Special Marine Warning	TAE		2 hr
Feb 18, 3:52 AM EST	Special Marine Warning	TAE		113 min
Feb 18, 5:38 AM EST	Special Marine Warning	TAE		2 hr
Feb 18, 3:43 PM EST	Fire Weather Watch	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	37 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2008 Severe Thunderstorm Warnings in Florida, 2008 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.