Alert archive / Georgia / Tornado Watches in 2011
Tornado Watch 47
The Storm Prediction Center issued this tornado watch at Mar 9, 2011, 8:39 AM CST for 5 counties in Alabama; 13 counties in Florida; 26 counties in Georgia. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2011, 8:39 AM CST (14:39 UTC)
- Expired
- Mar 9, 2011, 4:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 44 counties
Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA
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
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 9:44 AM CST | Tornado Warning | TAE | Coffee | 31 min |
| Mar 9, 10:05 AM CST | Tornado Warning | TAE | Coffee, Dale | 25 min |
| Mar 9, 10:11 AM CST | Tornado Warning | TAE | Coffee, Geneva | 34 min |
| Mar 9, 10:18 AM CST | Tornado Warning | TAE | Dale | 27 min |
| Mar 9, 10:37 AM CST | Severe Thunderstorm Warning | TAE | Geneva | 38 min |
| Mar 9, 10:47 AM CST | Tornado Warning | TAE | Dale, Geneva, Houston | 28 min |
| Mar 9, 10:48 AM CST | Severe Thunderstorm Warning | TAE | Dale, Henry | 42 min |
| Mar 9, 11:04 AM CST | Severe Thunderstorm Warning | TAE | Calhoun, Clay, Early, Quitman, Randolph | 41 min |
| Mar 9, 11:11 AM CST | Tornado Warning | TAE | Henry | 15 min |
| Mar 9, 11:43 AM CST | Severe Thunderstorm Warning | TAE | Baker, Calhoun, Dougherty, Early, Lee, Randolph and 1 more | 47 min |
| Mar 9, 12:17 PM CST | Severe Thunderstorm Warning | TAE | Dougherty, Lee, Terrell, Worth | 43 min |
| Mar 9, 1:00 PM CST | Severe Thunderstorm Warning | TAE | Ben Hill, Berrien, Irwin, Tift, Turner, Worth | 45 min |
| Mar 9, 1:17 PM CST | Tornado Warning | TAE | Colquitt, Tift, Worth | 28 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, 2.7 hours before the alert went out and 102 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 611 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 471 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
212
WWUS20 KWNS 091439
SEL7
SPC WW 091439
ALZ000-FLZ000-GAZ000-CWZ000-092200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 47
NWS STORM PREDICTION CENTER NORMAN OK
940 AM EST WED MAR 9 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF SOUTHEAST ALABAMA
LARGE PART OF FLORIDA PANHANDLE
PARTS OF SOUTHWEST GEORGIA
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 940 AM UNTIL
500 PM EST.
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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTHWEST OF PANAMA
CITY FLORIDA TO 40 MILES SOUTH SOUTHEAST OF MOULTRIE GEORGIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).
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...CONTINUE...WW 46...
DISCUSSION...STRONG QLCS WITH EMBEDDED SUPERCELLS MOVING EWD ACROSS
SRN AL INTO FL PANHANDLE. WITH VERY STRONG VEERING SHEAR PROFILES
AND SUFFICIENT MOIST GULF INFLOW...THREAT FOR BOTH DAMAGING WINDS
AND TORNADOES EXPECTED TO BE ASSOCIATED WITH THE QLCS AS IT
CONTINUES EWD THRU THE WATCH AREA.
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 26035.
...HALESSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 7:37 PM CST | Tornado Watch | SPC | Choctaw, Mobile, Washington | 7 hr |
| Mar 9, 1:28 AM CST | Mesoscale Discussion | SPC | Choctaw, Mobile, Washington | 92 min |
| Mar 9, 2:39 AM CST | Tornado Watch | SPC | Baldwin, Choctaw, Clarke, Mobile, Monroe, Washington and 1 more | 5 hr |
| Mar 9, 6:28 AM CST | Mesoscale Discussion | SPC | Choctaw, Mobile, Washington | 92 min |
| Mar 9, 7:26 AM CST | Tornado Watch | SPC | Baldwin, Butler, Conecuh, Covington, Crenshaw, Escambia and 2 more | 6 hr |
| Mar 9, 8:32 AM CST | Mesoscale Discussion | SPC | Coffee, Dale, Geneva, Henry, Houston | 28 min |
| Mar 9, 9:31 AM CST | Mesoscale Discussion | SPC | Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 7 more | 59 min |
| Mar 9, 11:09 AM CST | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 66 min |
| Mar 9, 12:38 PM CST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more | 67 min |
| Mar 9, 1:04 PM CST | Mesoscale Discussion | SPC | Nassau | 26 min |
| Mar 9, 3:14 PM CST | Mesoscale Discussion | SPC | Madison | 31 min |
| Mar 9, 1:21 PM CST | Severe Thunderstorm Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 29 more | 6 hr |
| Mar 9, 3:38 PM CST | Mesoscale Discussion | SPC | Brantley, Bryan, Bulloch, Camden, Charlton, Chatham and 14 more | 67 min |
Nearby
Tornado Watches in Georgia, 2011Tornado Watches in Florida, 2011Tornado Watches in Alabama, 2011Every tornado watch in 2011
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.