Alert archive / Georgia / Tornado Watches in 2014

Tornado Watch 68

April 7, 20144 states

The Storm Prediction Center issued this tornado watch at Apr 7, 2014, 2:02 PM EDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 7, 2014, 2:02 PM EDT (18:02 UTC)
Expired
Apr 7, 2014, 9:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 40 counties

Hamilton County, FL, Suwannee County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley 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, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 116 km from the middle of the area, began a volume at 18:04 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
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 7, 2:04 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee, Jeff Davis56 min
Apr 7, 2:11 PM EDTTornado WarningJAXCoffee49 min
Apr 7, 3:01 PM EDTSevere Thunderstorm WarningCHSBryan, Bulloch, Evans, Liberty, Long, Tattnall59 min
Apr 7, 3:48 PM EDTSevere Thunderstorm WarningJAXAtkinson, Brantley, Clinch, Pierce, Ware57 min
Apr 7, 3:59 PM EDTSevere Thunderstorm WarningCHSBryan, Bulloch, Evans, Liberty46 min
Apr 7, 4:35 PM EDTSevere Thunderstorm WarningJAXBrantley, Glynn, Pierce, Wayne55 min
Apr 7, 4:44 PM EDTTornado WarningJAXBrantley, Glynn, Wayne31 min
Apr 7, 4:49 PM EDTSevere Thunderstorm WarningCHSLiberty, McIntosh56 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

Charleston AFB, SC (KCHS), launched 12:00Z, 6.0 hours before the alert went out and 20 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, Charleston AFB, SC at 12:00Z on 2014-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 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, Charleston AFB, SC at 12:00Z on 2014-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 363 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
200 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
538 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
363 m²/s²
0-3 km storm-relative helicity
390 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

072 
WWUS20 KWNS 071805
SEL8  
SPC WW 071805
FLZ000-GAZ000-NCZ000-SCZ000-CWZ000-080100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 68
NWS STORM PREDICTION CENTER NORMAN OK
205 PM EDT MON APR 7 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHEAST FLORIDA
  EASTERN GEORGIA
  SOUTHEAST NORTH CAROLINA
  EASTERN SOUTH CAROLINA
  COASTAL WATERS

* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
  900 PM EDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL TORNADOES POSSIBLE
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF WILMINGTON
NORTH CAROLINA TO 45 MILES SOUTH OF WAYCROSS GEORGIA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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 67...

DISCUSSION...LONG-LIVED QLCS OVER CNTRL GA WILL CONTINUE EWD ACROSS
SRN PORTIONS OF THE WATCH AREA THIS AFTERNOON INTO EVENING. FARTHER
TO THE NORTH...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG A
COMPOSITE OUTFLOW BOUNDARY-WEDGE FRONT OVER THE EASTERN CAROLINAS
THIS AFTERNOON. VERTICAL SHEAR WILL REMAIN STRONG AND SUPPORTIVE OF
EMBEDDED SUPERCELL AND BOWING STRUCTURES WITH A RISK FOR A FEW
TORNADOES AND LOCALLY DAMAGING WINDS.

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 500.
MEAN STORM MOTION VECTOR 24035.


...MEAD

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 6, 11:10 PM EDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa, Walton2 hr
Apr 7, 1:50 AM EDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa25 min
Apr 7, 2:16 AM EDTTornado WatchSPCEscambia, Okaloosa, Santa Rosa7 hr
Apr 7, 6:42 AM EDTMesoscale DiscussionSPCBay, Calhoun, Escambia, Gadsden, Holmes, Jackson and 7 more2 hr
Apr 7, 8:46 AM EDTTornado WatchSPCBay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 13 more7 hr
Apr 7, 11:04 AM EDTMesoscale DiscussionSPCBaker, Bay, Calhoun, Columbia, Franklin, Gadsden and 15 more116 min
Apr 7, 1:45 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Columbia, Dixie, Duval and 10 more60 min
Apr 7, 3:00 PM EDTMesoscale DiscussionSPCDixie, Franklin, Gadsden, Gulf, Jefferson, Lafayette and 5 more60 min
Apr 7, 3:33 PM EDTTornado WatchSPCDixie, Franklin, Gadsden, Gulf, Jefferson, Lafayette and 5 more6 hr
Apr 7, 2:50 PM EDTMesoscale DiscussionSPCBeaufort, Camden, Carteret, Chowan, Craven, Currituck and 9 more85 min

Nearby

Tornado Watches in Georgia, 2014Tornado Watches in South Carolina, 2014Tornado Watches in North Carolina, 2014Every tornado watch in 2014

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.