Alert archive / Georgia / Freeze Watches in 2012

Freeze Watch 4, NWS Tallahassee, FL

December 20, 201216 counties in Florida; 26 counties in Georgia; 5 counties in Alabama

NWS Tallahassee, FL issued this freeze watch at Dec 20, 2012, 2:50 AM CST for 16 counties in Florida; 26 counties in Georgia; 5 counties in Alabama. It took effect at Dec 22, 2012, 12:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 20, 2012, 2:50 AM CST (08:50 UTC)
In effect from
Dec 22, 2012, 12:00 AM CST
Expired
Dec 21, 2012, 2:56 AM CST
In force
Issued by
NWS Tallahassee, FL
All 47 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Taylor 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

The radar

The Tallahassee radar (KTLH), 66 km from the middle of the area, began a volume at 08:49 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.8 hours before the alert went out and 66 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 00:00Z on 2012-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2012-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2500 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze watch 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 freeze watch went out at Dec 19, 7:26 PM CST, 7 hours 24 minutes earlier.

Area forecast discussion, Dec 19, 7:26 PM CST, 7 hours 24 minutes before
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Hazardous weather outlook, Dec 19, 6:09 PM CST, 8 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
709 PM EST WED DEC 19 2012

ALZ065>069-FLZ007>019-026>029-034-108-112-114-115-118-127-128-134-
GAZ120>131-142>148-155>161-GMZ730-750-755-765-770-775-201200-
COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-CENTRAL WALTON-
HOLMES-WASHINGTON-JACKSON-INLAND BAY-CALHOUN-INLAND GULF-
INLAND FRANKLIN-GADSDEN-LEON-INLAND JEFFERSON-MADISON-LIBERTY-
INLAND WAKULLA-INLAND TAYLOR-LAFAYETTE-INLAND DIXIE-SOUTH WALTON-
COASTAL BAY-COASTAL GULF-COASTAL FRANKLIN-COASTAL JEFFERSON-
COASTAL WAKULLA-COASTAL TAYLOR-COASTAL 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-
709 PM EST WED DEC 19 2012 /609 PM CST WED DEC 19 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA...
SOUTHWEST AND SOUTH CENTRAL GEORGIA...AND THE FLORIDA BIG BEND
AND PANHANDLE...AND ADJACENT COASTAL WATERS.

.DAY ONE...TONIGHT...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...
A STRONG COLD FRONT WILL CROSS THE REGION ON THURSDAY. A LINE OF
STRONG TO ISOLATED SEVERE STORMS WILL BE POSSIBLE ALONG AND AHEAD
OF THE FRONT DURING THE DAY ON THURSDAY. THE PRIMARY THREAT WITH
THESE STORMS WILL BE DAMAGING WINDS.

A MUCH DRIER AND COLDER AIRMASS WILL MOVE INTO THE REGION BEHIND
THE FRONT...WITH LIGHT FREEZES POSSIBLE SATURDAY AND SUNDAY
MORNINGS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT...BUT SPOTTER
ACTIVATION IS POSSIBLE ON THURSDAY.

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.

DVD/CAMP

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 20, 3:31 AM CSTGale WarningTAE26 hr
Dec 20, 3:39 AM CSTRip Current StatementTAEBay, Gulf, Walton38 hr
Dec 20, 8:20 AM CSTDense Fog AdvisoryTAEGadsden, Leon, Wakulla100 min
Dec 20, 8:30 AM CSTMarine Dense Fog AdvisoryTAE4 hr
Dec 20, 10:50 AM CSTSevere Thunderstorm WarningTAEHolmes, Walton40 min
Dec 20, 10:51 AM CSTSpecial Marine WarningTAE114 min
Dec 20, 11:26 AM CSTSevere Thunderstorm WarningTAEHolmes, Walton64 min
Dec 20, 11:45 AM CSTSevere Thunderstorm WarningTAEBay, Holmes, Walton, Washington45 min
Dec 20, 12:25 PM CSTSevere Thunderstorm WarningTAEBay, Calhoun, Holmes, Jackson, Washington50 min
Dec 20, 12:41 PM CSTSpecial Marine WarningTAE3 hr
Dec 20, 1:16 PM CSTTornado WarningTAEBay, Gulf29 min
Dec 20, 2:55 PM CSTSpecial Marine WarningTAE3 hr
Dec 20, 3:28 PM CSTSevere Thunderstorm WarningTAEJefferson, Leon, Madison47 min
Dec 20, 4:22 PM CSTTornado WarningTAETaylor23 min
Dec 20, 4:47 PM CSTSevere Thunderstorm WarningTAEMadison28 min
Dec 20, 5:48 PM CSTSpecial Marine WarningTAE42 min
Dec 20, 3:16 PM CSTSevere Thunderstorm WarningTAEGrady, Thomas29 min
Dec 20, 10:09 AM CSTTornado WarningTAECoffee32 min
Dec 20, 11:35 AM CSTSevere Thunderstorm WarningTAEDale, Henry55 min
Dec 20, 11:46 AM CSTTornado WarningTAEDale, Henry, Houston19 min

Nearby

Freeze Watches in Georgia, 2012Freeze Watches in Florida, 2012Freeze Watches in Alabama, 2012Every freeze 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; radar from the NEXRAD Level II archive.