Alert archive / Georgia / Tornado Watches in 2017

Tornado Watch 4

January 2, 20179 counties in Alabama; 10 counties in Florida; 31 counties in Georgia

The Storm Prediction Center issued this tornado watch at Jan 2, 2017, 3:46 PM CST for 9 counties in Alabama; 10 counties in Florida; 31 counties in Georgia. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jan 2, 2017, 3:46 PM CST (21:46 UTC)
Expired
Jan 2, 2017, 11:48 PM CST
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 50 counties

Barbour County, AL, Bullock County, AL, Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Russell County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Colquitt County, GA, Crisp County, GA, Decatur County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Worth County, GA

The radar

The Ft Rucker radar (KEOX), 21 km from the middle of the area, began a volume at 21:49 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.

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
10%
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

37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 2, 3:51 PM CSTTornado WarningBMXPike34 min
Jan 2, 4:11 PM CSTTornado WarningBMXBullock48 min
Jan 2, 4:35 PM CSTTornado WarningTAERandolph25 min
Jan 2, 4:37 PM CSTTornado Warning Tornado observedFFCStewart, Webster38 min
Jan 2, 4:43 PM CSTFlash Flood WarningTAEGeneva6 hr
Jan 2, 5:06 PM CSTSevere Thunderstorm WarningFFCChattahoochee, Marion, Muscogee39 min
Jan 2, 5:14 PM CSTSevere Thunderstorm WarningFFCMarion, Schley, Sumter, Webster31 min
Jan 2, 5:27 PM CSTFlash Flood WarningBMXBullock, Pike6 hr
Jan 2, 5:56 PM CSTFlash Flood WarningBMXBarbour, Russell5 hr
Jan 2, 6:25 PM CSTSevere Thunderstorm WarningTAECoffee, Geneva80 min
Jan 2, 6:29 PM CSTSevere Thunderstorm WarningFFCMarion, Talbot, Taylor16 min
Jan 2, 6:45 PM CSTFlash Flood WarningFFCChattahoochee, Muscogee6 hr
Jan 2, 7:05 PM CSTSevere Thunderstorm WarningTAECoffee, Dale, Geneva, Henry, Houston55 min
Jan 2, 7:13 PM CSTFlash Flood WarningTAEDale, Geneva, Houston3 hr
Jan 2, 7:33 PM CSTTornado WarningTAEGeneva, Houston27 min
Jan 2, 7:45 PM CSTSevere Thunderstorm WarningTAEHenry, Houston60 min
Jan 2, 7:46 PM CSTTornado Warning Tornado observedTAEHouston29 min
Jan 2, 7:57 PM CSTSevere Thunderstorm WarningTAEBay, Calhoun, Gadsden, Jackson, Liberty, Washington63 min
Jan 2, 8:04 PM CSTTornado WarningTAEEarly, Miller26 min
Jan 2, 8:08 PM CSTTornado WarningTAEEarly, Miller, Seminole37 min
Jan 2, 8:17 PM CSTTornado Warning Tornado observedTAEEarly28 min
Jan 2, 8:23 PM CSTTornado Warning Tornado observedTAEBaker, Calhoun, Early37 min
Jan 2, 8:26 PM CSTSevere Thunderstorm WarningTAECalhoun, Clay, Quitman, Randolph, Terrell64 min
Jan 2, 8:28 PM CSTTornado WarningTAEDecatur32 min
Jan 2, 8:34 PM CSTSevere Thunderstorm WarningTAEBaker, Calhoun, Decatur, Dougherty, Grady, Miller and 1 more56 min
Jan 2, 8:39 PM CSTTornado Warning Tornado observedTAEBaker, Calhoun, Dougherty, Early, Terrell36 min
Jan 2, 8:44 PM CSTTornado WarningTAEBaker, Miller, Mitchell31 min
Jan 2, 8:45 PM CSTSevere Thunderstorm WarningTAEGadsden, Liberty45 min
Jan 2, 9:00 PM CSTTornado Warning Tornado observedTAEDougherty, Lee, Terrell30 min
Jan 2, 9:03 PM CSTSevere Thunderstorm WarningTAELee42 min
Jan 2, 9:09 PM CSTSevere Thunderstorm WarningTAEBrooks, Colquitt, Cook, Thomas, Tift, Turner and 1 more66 min
Jan 2, 9:19 PM CSTTornado WarningTAEDougherty, Lee, Worth26 min
Jan 2, 9:33 PM CSTTornado WarningTAEDougherty, Lee, Turner, Worth27 min
Jan 2, 9:51 PM CSTSevere Thunderstorm WarningFFCCrisp, Wilcox39 min
Jan 2, 9:54 PM CSTSevere Thunderstorm WarningTAEBen Hill, Berrien, Cook, Irwin, Tift66 min
Jan 2, 10:18 PM CSTSevere Thunderstorm WarningTAEWalton, Washington27 min
Jan 2, 10:20 PM CSTTornado WarningTAELiberty40 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, 9.8 hours before the alert went out and 149 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 2017-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 235 joules per kilogram.LCLLFCEL10008507005003002001001 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 2017-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 square meters per square second.19395878Sfc1 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
235 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
683 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.9

Open this sounding in Storm Lab

The text

As transmitted.

806 
WWUS20 KWNS 022144
SEL4  
SPC WW 022144
ALZ000-FLZ000-GAZ000-CWZ000-030400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 4
NWS Storm Prediction Center Norman OK
345 PM CST Mon Jan 2 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southeast Alabama
  A part of the Florida Panhandle
  Southwest Georgia
  Coastal Waters

* Effective this Monday afternoon and evening from 345 PM until
  1000 PM CST.

* Primary threats include...
  A couple tornadoes possible
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...A few severe storms are expected to spread from southern
Alabama and extreme northwest Florida toward southwest Georgia this
evening as a weather system moves eastward across the lower
Mississippi Valley.  Damaging wind gusts and a few tornadoes will be
possible, especially near a warm front located across southeast
Alabama into southern Georgia.

The tornado watch area is approximately along and 65 statute miles
north and south of a line from 40 miles south of Troy AL to 20 miles
south southeast of Albany GA. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU4).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24035.

...Weiss

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 2, 7:08 AM CSTMesoscale DiscussionSPCBibb, Choctaw, Greene, Hale, Marengo, Perry and 3 more97 min
Jan 2, 10:17 AM CSTMesoscale DiscussionSPCBaldwin, Clarke, Mobile, Washington118 min
Jan 2, 11:22 AM CSTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 8 more9 hr
Jan 2, 12:59 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Chambers, Chilton and 17 more2 hr
Jan 2, 2:03 PM CSTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 10 more117 min
Jan 2, 5:36 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Coffee, Covington, Crenshaw and 10 more114 min

Nearby

Tornado Watches in Georgia, 2017Tornado Watches in Florida, 2017Tornado Watches in Alabama, 2017Every tornado watch in 2017

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.