Alert archive / Georgia / Wind Chill Advisories in 2021

Wind Chill Advisory 1, NWS Tallahassee, FL

February 15, 20216 counties in Georgia; Holmes County, Walton County, Florida; 5 counties in Alabama

NWS Tallahassee, FL issued this wind chill advisory at Feb 15, 2021, 2:39 PM EST for 6 counties in Georgia; Holmes County, Walton County, Florida; 5 counties in Alabama. It took effect at Feb 16, 2021, 3:00 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 15, 2021, 2:39 PM EST (19:39 UTC)
In effect from
Feb 16, 2021, 3:00 AM EST
Expired
Feb 16, 2021, 11:00 AM EST
In force
8 hr
Issued by
NWS Tallahassee, FL

Counties Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Holmes County, FL, Walton County, FL, Calhoun County, GA, Clay County, GA, Early County, GA, Quitman County, GA, Randolph County, GA, Terrell County, GA

The radar

The Ft Rucker radar (KEOX), 19 km from the middle of the area, began a volume at 19:41 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 12:00Z, 7.7 hours before the alert went out and 144 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 12:00Z on 2021-02-15Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2021-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.1939587897Sfc1 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
468 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

791 
WWUS42 KTAE 151939
WSWTAE

URGENT - WINTER WEATHER MESSAGE
National Weather Service Tallahassee FL
239 PM EST Mon Feb 15 2021

.Temperatures will fall from the 60s this afternoon to the middle
and upper 20s late tonight behind a cold front. Meanwhile, 
winds will remain elevated around 10 mph through the overnight
hours. This will lead to minimum wind chill/apparent temperatures 
between 15 and 20 degrees late tonight and early Tuesday morning. 
In addition, any standing water from today's rainfall has the 
potential to freeze after midnight, leading to icy spots on 
bridges, overpasses, and untreated surfaces.

ALZ065>069-FLZ007>009-GAZ120>124-142-161600-
/O.NEW.KTAE.WC.Y.0001.210216T0800Z-210216T1600Z/
Coffee-Dale-Henry-Geneva-Houston-North Walton-Central Walton-
Holmes-Quitman-Clay-Randolph-Calhoun-Terrell-Early-
Including the cities of Battens Crossroads, Enterprise, 
Enterprise Municipal A/P, Keyton, Asbury, Beamon, 
Blackwell Field A/P, Browns Crossroads, Daleville, Dill, Ewell, 
Fort Rucker, Mabson, Ozark, Blackwood, Headland, 
Headland Municipal A/P, Abbeville, Abbeville Municipal A/P, 
Lawrenceville, Screamer, Geneva, Geneva Municipal A/P, Fadette, 
Hartford, Ganer, Hacoda, Logan Field Municipal A/P, Dothan, 
Ashford, Cottonwood, Alpine Heights, Argyle, Center Ridge, 
Cluster Springs, De Funiak Spring Airport, De Funiak Springs, 
Glendale, Eucheeanna, Pleasant Ridge, Barker Store, Leonia, 
New Hope, Bonifay, Holmes County Airport, Cobb Crossroads, 
Crossroads, Georgetown, Hatcher, Wire Bridge, Union, 
Bagby State Park, Days Crossroads, Fort Gaines, Jones Crossing, 
Moores Crossroads, Pecan, Ricks Place, Benevolence, Coles, 
Cuthbert, Peterson Hill, Shivers Mill, Springvale, 
Springvale Station, Arlington, Commissary Hill, Cordrays Mill, 
Dickey, Morgan, Williamsburg, Edison, Clarks Mill, Dawson, 
Dawson Municipal A/P, Doverel, Graves, Herod, Yeomans, 
Douglasville, Blakely, Centerville, Cuba, and Early Co A/P
239 PM EST Mon Feb 15 2021 /139 PM CST Mon Feb 15 2021/

...WIND CHILL ADVISORY IN EFFECT FROM 3 AM EST /2 AM CST/ TO
11 AM EST /10 AM CST/ TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  15 degrees expected.

* WHERE...Portions of southeast Alabama, southwest Georgia and 
  Panhandle Florida.

* WHEN...From 3 AM EST /2 AM CST/ to 11 AM EST /10 AM CST/ 
  Tuesday.

* IMPACTS...The cold wind chills could result in hypothermia if 
  precautions are not taken.

* ADDITIONAL DETAILS...Standing water from today's rainfall has 
  the potential to freeze after midnight, leading to icy spots on 
  bridges, overpasses, and untreated surfaces.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frostbite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves. 

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 3:24 PM ESTSevere Thunderstorm WarningTAEBerrien, Brooks, Cook, Lanier, Lowndes55 min
Feb 15, 4:01 PM ESTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Decatur, Dougherty, Early and 6 more59 min
Feb 15, 4:03 PM ESTSevere Thunderstorm WarningTAEDecatur, Seminole57 min
Feb 15, 4:28 PM ESTTornado WarningTAEDecatur, Miller, Seminole16 min
Feb 15, 4:30 PM ESTTornado WarningTAEBaker, Calhoun, Early, Miller19 min
Feb 15, 4:42 PM ESTTornado Warning Tornado observedConsiderable damage threatTAEBaker, Calhoun, Dougherty, Early17 min
Feb 15, 4:52 PM ESTSevere Thunderstorm WarningTAEBaker, Calhoun, Decatur, Dougherty, Grady, Lee and 3 more38 min
Feb 15, 2:11 AM ESTRip Current StatementTAEBay, Franklin, Gulf, Walton41 hr
Feb 15, 2:16 AM ESTSmall Craft AdvisoryTAE29 hr
Feb 15, 1:35 PM ESTSpecial Marine WarningTAE3 hr
Feb 15, 1:53 PM ESTSevere Thunderstorm WarningTAEWalton67 min
Feb 15, 2:12 PM ESTSpecial Marine WarningTAE3 hr
Feb 15, 2:36 PM ESTSevere Thunderstorm WarningTAEBay, Holmes, Jackson, Walton, Washington54 min
Feb 15, 2:43 PM ESTSevere Thunderstorm WarningTAELafayette, Madison, Taylor62 min
Feb 15, 3:02 PM ESTTornado WarningTAEBay, Walton, Washington28 min
Feb 15, 3:22 PM ESTSevere Thunderstorm WarningTAEBay, Calhoun, Gulf, Holmes, Jackson, Liberty and 1 more53 min
Feb 15, 3:39 PM ESTTornado WarningTAELafayette21 min
Feb 15, 3:41 PM ESTTornado WarningTAEBay, Jackson, Washington12 min
Feb 15, 4:25 PM ESTSpecial Marine WarningTAE2 hr
Feb 15, 5:11 PM ESTSevere Thunderstorm WarningTAEJefferson, Madison, Taylor64 min
Feb 15, 5:53 PM ESTSevere Thunderstorm WarningTAELafayette, Madison, Taylor26 min
Feb 15, 6:22 PM ESTSpecial Marine WarningTAE38 min
Feb 15, 6:40 PM ESTSevere Thunderstorm WarningTAEDixie35 min
Feb 15, 6:56 PM ESTSpecial Marine WarningTAE34 min
Feb 15, 2:34 PM ESTSevere Thunderstorm WarningTAECoffee, Geneva41 min
Feb 15, 2:57 PM ESTSevere Thunderstorm WarningTAECoffee, Dale, Geneva, Henry, Houston63 min
Feb 15, 3:08 PM ESTSevere Thunderstorm WarningTAECoffee, Geneva17 min
Feb 15, 3:37 PM ESTSevere Thunderstorm WarningTAEDale, Geneva, Henry, Houston53 min

Nearby

Wind Chill Advisories in Georgia, 2021Wind Chill Advisories in Alabama, 2021Wind Chill Advisories in Florida, 2021Every wind chill advisory in 2021

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.