Alert archive / Georgia / Tornado Watches in 2016

Tornado Watch 74

April 1, 20165 counties in Alabama; 60 counties in Georgia; 12 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Apr 1, 2016, 6:26 AM CDT for 5 counties in Alabama; 60 counties in Georgia; 12 counties in South Carolina. It was in force for 12 hr.

The area

The outline as issued.

The facts

Issued
Apr 1, 2016, 6:26 AM CDT (11:26 UTC)
Expired
Apr 1, 2016, 6:02 PM CDT
In force
12 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 77 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Bibb County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Calhoun County, GA, Candler County, GA, Chatham County, GA, Chattahoochee County, GA, Clay County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Houston County, GA, Irwin County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Peach County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Stewart County, GA, Sumter County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC, Orangeburg County, SC

The radar

The Robins AFB radar (KJGX), 33 km from the middle of the area, began a volume at 11:26 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
30%
One or more gusts of 65 knots or more
5%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
50%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 1, 6:30 AM CDTTornado WarningFFCHouston, Peach, Twiggs30 min
Apr 1, 6:56 AM CDTSevere Thunderstorm WarningTAEDale, Henry34 min
Apr 1, 6:58 AM CDTTornado WarningFFCTwiggs, Wilkinson32 min
Apr 1, 7:47 AM CDTSevere Thunderstorm WarningTAECalhoun, Clay, Randolph32 min
Apr 1, 7:52 AM CDTTornado WarningFFCBleckley, Laurens, Twiggs, Wilkinson38 min
Apr 1, 8:34 AM CDTSevere Thunderstorm WarningFFCLaurens29 min
Apr 1, 9:02 AM CDTSevere Thunderstorm WarningFFCEmanuel, Johnson12 min
Apr 1, 9:40 AM CDTTornado WarningFFCEmanuel, Treutlen35 min
Apr 1, 10:07 AM CDTSevere Thunderstorm WarningCHSCandler35 min
Apr 1, 10:13 AM CDTSevere Thunderstorm WarningTAECoffee, Dale47 min
Apr 1, 10:15 AM CDTTornado WarningFFCEmanuel15 min
Apr 1, 11:10 AM CDTSevere Thunderstorm WarningFFCEmanuel35 min
Apr 1, 11:14 AM CDTFlash Flood WarningTAECoffee, Dale, Geneva, Houston3 hr
Apr 1, 11:28 AM CDTSevere Thunderstorm WarningCHSEffingham, Screven47 min
Apr 1, 11:46 AM CDTFlash Flood WarningTAECoffee, Dale, Henry, Houston2 hr
Apr 1, 1:01 PM CDTSevere Thunderstorm WarningTAEBaker, Calhoun, Dougherty, Lee, Randolph, Terrell32 min
Apr 1, 1:09 PM CDTFlash Flood WarningTAEGeneva, Houston2 hr
Apr 1, 2:45 PM CDTSevere Thunderstorm WarningCAEAiken, Calhoun, Fairfield, Lexington, Richland, Saluda60 min
Apr 1, 3:12 PM CDTSevere Thunderstorm WarningTAEBerrien, Brooks, Colquitt, Cook, Lowndes, Thomas and 1 more48 min
Apr 1, 4:33 PM CDTSevere Thunderstorm WarningCHSBulloch, Effingham, Screven26 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 11.4 hours before the alert went out and 139 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, Peachtre/Fal Fld, GA at 00:00Z on 2016-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 138 joules per kilogram.LCLLFCEL10008507005003002001001 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, Peachtre/Fal Fld, GA at 00:00Z on 2016-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.1939587897117136Sfc1 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
138 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
960 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

196 
WWUS20 KWNS 011122
SEL4  
SPC WW 011122
ALZ000-GAZ000-SCZ000-011900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 74
NWS STORM PREDICTION CENTER NORMAN OK
725 AM EDT FRI APR 1 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  EXTREME SOUTHEASTERN ALABAMA
  CENTRAL AND SOUTHERN GEORGIA
  SOUTHERN SOUTH CAROLINA

* EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 725 AM UNTIL
  300 PM EDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...A BAND OF THUNDERSTORMS SHOULD CONTINUE TO SHIFT
EAST-NORTHEASTWARD ACROSS THE WATCH AREA THROUGH THE REMAINDER OF
THE MORNING AND INTO EARLY AFTERNOON...OFFERING OCCASIONAL DAMAGING
GUSTS AND THE RISK OF A COUPLE TORNADOES.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST OF DOTHAN
ALABAMA TO 15 MILES NORTH NORTHEAST OF CHARLESTON SOUTH CAROLINA.
 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.

&&

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 450.
MEAN STORM MOTION VECTOR 26035.


...EDWARDS

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 31, 7:41 PM CDTMesoscale DiscussionSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 6 more94 min
Mar 31, 8:14 PM CDTTornado WatchSPCBarbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 8 more18 hr
Mar 31, 10:11 PM CDTMesoscale DiscussionSPCAutauga, Bullock, Calhoun, Chambers, Cherokee, Chilton and 14 more64 min
Apr 1, 2:03 AM CDTMesoscale DiscussionSPCAutauga, Bullock, Dallas, Elmore, Lee, Lowndes and 5 more57 min
Apr 1, 4:46 AM CDTMesoscale DiscussionSPCBarbour, Bullock, Coffee, Crenshaw, Dale, Henry and 2 more89 min
Apr 1, 10:40 AM CDTMesoscale DiscussionSPCBarbour, Coffee, Dale, Geneva, Henry, Houston and 2 more2 hr
Apr 1, 1:00 PM CDTMesoscale DiscussionSPCHenry, Houston60 min
Mar 31, 7:09 PM CDTMesoscale DiscussionSPCBrooks, Colquitt, Cook, Decatur, Grady, Lowndes and 3 more96 min
Apr 1, 12:31 AM CDTMesoscale DiscussionSPCBaldwin, Bleckley, Burke, Columbia, Dodge, Elbert and 18 more89 min
Apr 1, 1:48 PM CDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 50 more6 hr
Apr 1, 4:40 PM CDTMesoscale DiscussionSPCBrantley, Bryan, Camden, Charlton, Chatham, Clinch and 9 more65 min

Nearby

Tornado Watches in Georgia, 2016Tornado Watches in South Carolina, 2016Tornado Watches in Alabama, 2016Every tornado watch in 2016

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.