Alert archive / Georgia / Tornado Watches in 2012
Tornado Watch 698
The Storm Prediction Center issued this tornado watch at Dec 25, 2012, 9:23 PM CST for 18 counties in Alabama; 15 counties in Florida; 29 counties in Georgia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 25, 2012, 9:23 PM CST (03:23 UTC)
- Expired
- Dec 26, 2012, 3:21 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 62 counties
Baldwin County, AL, Barbour County, AL, Bullock County, AL, Chambers County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Harris County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Muscogee County, GA, Pike County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Upson County, GA, Webster 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
- 40%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 9:29 PM CST | Severe Thunderstorm Warning | MOB | Conecuh, Covington, Escambia | 46 min |
| Dec 25, 9:35 PM CST | Severe Thunderstorm Warning | MOB | Butler, Conecuh, Covington, Crenshaw | 70 min |
| Dec 25, 9:45 PM CST | Severe Thunderstorm Warning | MOB | Baldwin, Covington, Escambia | 45 min |
| Dec 25, 9:51 PM CST | Severe Thunderstorm Warning | BMX | Montgomery | 39 min |
| Dec 25, 10:12 PM CST | Severe Thunderstorm Warning | TAE | Coffee | 63 min |
| Dec 25, 10:15 PM CST | Severe Thunderstorm Warning | MOB | Covington, Crenshaw | 60 min |
| Dec 25, 10:18 PM CST | Tornado Warning | BMX | Pike | 42 min |
| Dec 25, 10:22 PM CST | Severe Thunderstorm Warning | BMX | Bullock | 38 min |
| Dec 25, 10:29 PM CST | Severe Thunderstorm Warning | MOB | Covington, Escambia | 46 min |
| Dec 25, 10:40 PM CST | Tornado Warning | MOB | Covington | 35 min |
| Dec 25, 10:45 PM CST | Severe Thunderstorm Warning | BMX | Macon | 45 min |
| Dec 25, 10:48 PM CST | Severe Thunderstorm Warning | BMX | Bullock, Pike | 42 min |
| Dec 25, 10:54 PM CST | Severe Thunderstorm Warning | TAE | Walton | 66 min |
| Dec 25, 10:56 PM CST | Severe Thunderstorm Warning | TAE | Coffee, Geneva | 49 min |
| Dec 25, 11:13 PM CST | Severe Thunderstorm Warning | TAE | Coffee, Dale | 32 min |
| Dec 25, 11:14 PM CST | Severe Thunderstorm Warning | MOB | Covington | 26 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 00:00Z, 3.4 hours before the alert went out and 177 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
- 1109 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 410 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
292
WWUS20 KWNS 260322
SEL8
SPC WW 260322
ALZ000-FLZ000-GAZ000-CWZ000-261000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 698
NWS STORM PREDICTION CENTER NORMAN OK
925 PM CST TUE DEC 25 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN AND SOUTHEAST ALABAMA
FLORIDA PANHANDLE
SOUTHWEST GEORGIA
COASTAL WATERS
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 925 PM
UNTIL 400 AM CST.
TORNADOES...HAIL TO 0.5 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH NORTHEAST OF
COLUMBUS GEORGIA TO 40 MILES SOUTH SOUTHWEST OF PANAMA CITY
FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
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 696...
DISCUSSION...A LINE OF INTENSE STORMS...INCLUDING EMBEDDED
SUPERCELLS...IS TRACKING EASTWARD ACROSS CENTRAL AL. THESE STORMS
WILL REMAIN IN AN ENVIRONMENT OF STRONG LOW LEVEL VERTICAL SHEAR AND
SUFFICIENT INSTABILITY TO POSE A RISK OF DAMAGING WINDS AND ISOLATED
TORNADOES FOR SEVERAL MORE HOURS AS THEY TRACK INTO WESTERN GA.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 25040.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 6:05 PM CST | Mesoscale Discussion | SPC | Bibb, Chambers, Chilton, Clay, Coosa, Elmore and 5 more | 85 min |
| Dec 25, 7:08 PM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Butler, Chilton, Clarke, Clay and 14 more | 67 min |
| Dec 25, 8:49 PM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Coffee, Covington, Crenshaw, Dale and 9 more | 56 min |
| Dec 25, 11:10 PM CST | Mesoscale Discussion | SPC | Barbour, Dale, Geneva, Henry, Houston, Lee and 1 more | 95 min |
| Dec 26, 2:55 AM CST | Mesoscale Discussion | SPC | Calhoun, Gadsden, Gulf, Liberty | 65 min |
Nearby
Tornado Watches in Georgia, 2012Tornado Watches in Alabama, 2012Tornado Watches in Florida, 2012Every tornado watch in 2012
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.