Alert archive / Georgia / Tornado Watches in 2009
Tornado Watch 76
The Storm Prediction Center issued this tornado watch at Mar 27, 2009, 11:05 AM EDT for 8 counties in Florida; 9 counties in Georgia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2009, 11:05 AM EDT (15:05 UTC)
- Expired
- Mar 27, 2009, 2:00 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
Counties Dixie County, FL, Franklin County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Berrien County, GA, Brooks County, GA, Colquitt County, GA, Cook County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Mitchell County, GA, Thomas County, GA
The radar
The Tallahassee radar (KTLH), 51 km from the middle of the area, began a volume at 15:25 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 11:09 AM EDT | Severe Thunderstorm Warning | TAE | Gadsden, Jefferson, Leon, Wakulla | 51 min |
| Mar 27, 11:14 AM EDT | Tornado Warning | TAE | Colquitt, Mitchell, Worth | 46 min |
| Mar 27, 11:25 AM EDT | Tornado Warning | TAE | Leon, Wakulla | 50 min |
| Mar 27, 11:32 AM EDT | Tornado Warning | TAE | Franklin, Wakulla | 28 min |
| Mar 27, 12:09 PM EDT | Severe Thunderstorm Warning | TAE | Jefferson, Madison, Taylor | 51 min |
| Mar 27, 12:33 PM EDT | Severe Thunderstorm Warning | TAE | Jefferson, Madison | 57 min |
| Mar 27, 1:01 PM EDT | Severe Thunderstorm Warning | TAE | Lafayette, Madison, Taylor | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.1 hours before the alert went out and 49 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
- 31 J/kg
- Mixed-layer CIN
- -249 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
534
WWUS20 KWNS 271458
SEL6
SPC WW 271458
FLZ000-GAZ000-CWZ000-271800-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 76
NWS STORM PREDICTION CENTER NORMAN OK
1100 AM EDT FRI MAR 27 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
FLORIDA BIG BEND
SOUTHWEST GEORGIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 1100 AM UNTIL
200 PM EDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH OF MOULTRIE
GEORGIA TO 45 MILES SOUTH SOUTHEAST OF TALLAHASSEE FLORIDA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 75. WATCH NUMBER 75 WILL NOT BE IN EFFECT AFTER 1100
AM EDT.
DISCUSSION...WELL-DEVELOPED MCS/SQUALL LINE WILL CONTINUE EWD ACROSS
THE FL BIG BEND AND SW GA THE NEXT FEW HOURS. SOME MOISTENING E OF
THE ONGOING STORMS SHOULD RESULT IN SUFFICIENT DESTABILIZATION TO
SUSTAIN THE THREAT FOR DAMAGING WINDS AND A COUPLE OF TORNADOES WITH
BOWING SEGMENTS IN THE LARGER SQUALL LINE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 27035.
...THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 12:53 AM EDT | Mesoscale Discussion | SPC | Escambia | 97 min |
| Mar 27, 1:48 AM EDT | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa | 7 hr |
| Mar 27, 3:23 AM EDT | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 67 min |
| Mar 27, 5:37 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more | 53 min |
| Mar 27, 6:02 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 6 more | 5 hr |
| Mar 27, 7:35 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Gulf, Holmes, Jackson, Okaloosa and 2 more | 55 min |
| Mar 27, 10:51 AM EDT | Mesoscale Discussion | SPC | Franklin, Gadsden, Gulf, Jefferson, Leon, Liberty and 3 more | 24 min |
| Mar 27, 1:11 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 12 more | 64 min |
Nearby
Tornado Watches in Georgia, 2009Tornado Watches in Florida, 2009Every tornado watch 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.