Alert archive / Georgia / Tornado Watches in 2016

Tornado Watch 75

April 1, 201614 counties in Florida; 56 counties in Georgia

The Storm Prediction Center issued this tornado watch at Apr 1, 2016, 1:48 PM CDT for 14 counties in Florida; 56 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 1, 2016, 1:48 PM CDT (18:48 UTC)
Expired
Apr 1, 2016, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 70 counties

Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Taylor County, FL, Wakulla County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dougherty County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Jenkins County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Screven County, GA, Seminole County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 94 km from the middle of the area, began a volume at 18:48 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
10%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
50%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 1, 3:12 PM CDTSevere Thunderstorm WarningTAEBerrien, Brooks, Colquitt, Cook, Lowndes, Thomas and 1 more48 min
Apr 1, 3:36 PM CDTSevere Thunderstorm WarningJAXAtkinson, Coffee, Jeff Davis39 min
Apr 1, 3:40 PM CDTSevere Thunderstorm WarningJAXBrantley, Charlton, Ware50 min
Apr 1, 3:45 PM CDTSevere Thunderstorm WarningTAEBerrien, Brooks, Lanier, Lowndes33 min
Apr 1, 3:57 PM CDTSevere Thunderstorm WarningJAXAtkinson, Clinch48 min
Apr 1, 4:10 PM CDTSevere Thunderstorm WarningJAXBrantley, Glynn, Wayne33 min
Apr 1, 4:11 PM CDTSevere Thunderstorm WarningJAXNassau31 min
Apr 1, 4:14 PM CDTTornado WarningJAXAtkinson, Bacon, Clinch, Coffee, Ware20 min
Apr 1, 4:33 PM CDTSevere Thunderstorm WarningCHSBulloch, Effingham, Screven26 min
Apr 1, 4:33 PM CDTSevere Thunderstorm WarningJAXAtkinson, Bacon, Clinch, Coffee, Pierce, Ware42 min
Apr 1, 4:37 PM CDTSevere Thunderstorm WarningJAXBrantley, Glynn23 min
Apr 1, 4:43 PM CDTSevere Thunderstorm WarningCHSMcIntosh62 min
Apr 1, 5:09 PM CDTSevere Thunderstorm WarningJAXAppling, Bacon, Brantley, Pierce, Ware, Wayne51 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, 6.8 hours before the alert went out and 93 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 2016-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 339 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 2016-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.1939587897117Sfc1 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
339 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
561 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
341 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

207 
WWUS20 KWNS 011845
SEL5  
SPC WW 011845
FLZ000-GAZ000-020100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 75
NWS STORM PREDICTION CENTER NORMAN OK
250 PM EDT FRI APR 1 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  FLORIDA PANHANDLE
  SOUTHERN GEORGIA

* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 250 PM UNTIL
  900 PM EDT.

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

SUMMARY...SCATTERED STRONG THUNDERSTORMS WILL CONTINUE TO AFFECT
PARTS OF SOUTH GA AND THE FL PANHANDLE THIS AFTERNOON AND EARLY
EVENING.  THE STRONGEST CELLS WILL POSE A RISK OF LOCALLY DAMAGING
WINDS AND AN ISOLATED TORNADO OR TWO.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTHWEST OF PANAMA
CITY FLORIDA TO 60 MILES EAST NORTHEAST OF VIDALIA GEORGIA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 74...

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 25030.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 1, 4:40 PM CDTMesoscale DiscussionSPCNassau65 min
Apr 1, 6:35 PM CDTMesoscale DiscussionSPCColumbia, Franklin, Gulf, Hamilton, Jefferson, Lafayette and 6 more85 min
Mar 31, 7:09 PM CDTMesoscale DiscussionSPCBrooks, Colquitt, Cook, Decatur, Grady, Lowndes and 3 more96 min
Mar 31, 7:41 PM CDTMesoscale DiscussionSPCBarrow, Bartow, Butts, Carroll, Catoosa, Chattahoochee and 42 more94 min
Mar 31, 8:14 PM CDTTornado WatchSPCBanks, Barrow, Bartow, Bibb, Butts, Carroll and 65 more18 hr
Mar 31, 10:11 PM CDTMesoscale DiscussionSPCBartow, Bibb, Butts, Carroll, Catoosa, Chattahoochee and 43 more64 min
Apr 1, 12:31 AM CDTMesoscale DiscussionSPCBaldwin, Bleckley, Burke, Columbia, Dodge, Elbert and 18 more89 min
Apr 1, 2:03 AM CDTMesoscale DiscussionSPCChattahoochee, Harris, Marion, Muscogee, Stewart57 min
Apr 1, 4:46 AM CDTMesoscale DiscussionSPCCalhoun, Chattahoochee, Clay, Crisp, Dooly, Dougherty and 17 more89 min
Apr 1, 6:26 AM CDTTornado WatchSPCBaker, Baldwin, Ben Hill, Bibb, Bleckley, Bryan and 54 more12 hr
Apr 1, 10:40 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 69 more2 hr
Apr 1, 1:00 PM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 54 more60 min

Nearby

Tornado Watches in Georgia, 2016Tornado Watches in Florida, 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.