Alert archive / Alabama / Tornado Watches in 2014

Tornado Watch 552

November 17, 201417 counties in Alabama; 15 counties in Florida; 14 counties in Georgia

The Storm Prediction Center issued this tornado watch at Nov 17, 2014, 1:32 AM CST for 17 counties in Alabama; 15 counties in Florida; 14 counties in Georgia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Nov 17, 2014, 1:32 AM CST (07:32 UTC)
Expired
Nov 17, 2014, 9:00 AM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
0.5 in
Strongest gust expected
60 kt
All 46 counties

Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Monroe County, AL, Pike County, AL, Russell County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA

The radar

The Eglin Afb radar (KEVX), 74 km from the middle of the area, began a volume at 07:32 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
20%
One or more gusts of 65 knots or more
5%
Ten or more severe hail reports
5%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
40%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Nov 17, 1:41 AM CSTTornado WarningMOBClarke, Washington49 min
Nov 17, 2:08 AM CSTTornado WarningMOBClarke37 min
Nov 17, 2:09 AM CSTSevere Thunderstorm WarningMOBBaldwin, Clarke, Conecuh, Escambia, Monroe, Washington66 min
Nov 17, 2:10 AM CSTTornado WarningTAEBay, Gulf35 min
Nov 17, 2:35 AM CSTTornado WarningTAECalhoun, Gulf25 min
Nov 17, 2:37 AM CSTTornado WarningMOBClarke, Monroe, Wilcox25 min
Nov 17, 2:43 AM CSTSevere Thunderstorm WarningTAEBay, Walton47 min
Nov 17, 2:46 AM CSTTornado WarningTAEBay, Washington29 min
Nov 17, 2:56 AM CSTTornado WarningTAEGeneva34 min
Nov 17, 3:07 AM CSTTornado WarningMOBConecuh, Monroe53 min
Nov 17, 3:14 AM CSTTornado WarningMOBButler, Conecuh, Monroe, Wilcox14 min
Nov 17, 3:15 AM CSTTornado WarningTAEBay, Washington30 min
Nov 17, 3:41 AM CSTTornado WarningTAEBay, Calhoun, Jackson, Washington49 min
Nov 17, 3:45 AM CSTTornado WarningMOBButler, Conecuh45 min
Nov 17, 3:46 AM CSTTornado WarningTAECalhoun44 min
Nov 17, 4:07 AM CSTSevere Thunderstorm WarningMOBButler, Covington, Crenshaw53 min
Nov 17, 4:20 AM CSTTornado WarningTAECalhoun, Gadsden, Liberty40 min
Nov 17, 4:21 AM CSTTornado WarningMOBButler, Crenshaw39 min
Nov 17, 4:40 AM CSTTornado WarningBMXPike35 min
Nov 17, 4:41 AM CSTSevere Thunderstorm WarningMOBBaldwin, Conecuh, Escambia49 min
Nov 17, 4:42 AM CSTTornado WarningMOBCrenshaw20 min
Nov 17, 4:45 AM CSTTornado WarningTAEGadsden45 min
Nov 17, 5:07 AM CSTTornado WarningTAEBay, Calhoun, Jackson, Washington38 min
Nov 17, 5:09 AM CSTTornado WarningBMXBullock24 min
Nov 17, 5:17 AM CSTTornado WarningTAEDecatur, Grady43 min
Nov 17, 5:20 AM CSTTornado WarningTAEBaker, Decatur, Miller, Mitchell40 min
Nov 17, 5:48 AM CSTTornado WarningBMXBullock, Russell22 min
Nov 17, 5:48 AM CSTTornado WarningTAEColquitt, Grady, Mitchell, Thomas27 min
Nov 17, 5:55 AM CSTTornado WarningTAEJackson50 min
Nov 17, 6:03 AM CSTSevere Thunderstorm WarningTAEBaker, Colquitt, Decatur, Grady, Mitchell, Thomas57 min
Nov 17, 6:18 AM CSTTornado WarningBMXRussell27 min
Nov 17, 6:45 AM CSTTornado WarningTAEColquitt, Grady, Mitchell30 min
Nov 17, 6:47 AM CSTTornado WarningTAEDecatur, Grady, Mitchell, Thomas28 min
Nov 17, 7:04 AM CSTSevere Thunderstorm WarningTAEGeneva, Houston26 min
Nov 17, 7:08 AM CSTTornado WarningTAEColquitt, Grady, Mitchell, Thomas52 min
Nov 17, 7:17 AM CSTSevere Thunderstorm WarningTAEBay, Walton, Washington28 min
Nov 17, 7:39 AM CSTSevere Thunderstorm WarningTAEBay, Calhoun, Holmes, Jackson, Washington51 min
Nov 17, 7:41 AM CSTTornado WarningTAEFranklin49 min
Nov 17, 8:00 AM CSTSevere Thunderstorm WarningTAEJackson45 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 00:00Z, 7.5 hours before the alert went out and 209 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 00:00Z on 2014-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 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, Tallahassee Rgnl, FL at 00:00Z on 2014-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
15 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
649 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

861 
WWUS20 KWNS 170733
SEL2  
SPC WW 170733
ALZ000-FLZ000-GAZ000-CWZ000-171500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 552
NWS STORM PREDICTION CENTER NORMAN OK
135 AM CST MON NOV 17 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHERN ALABAMA
  FLORIDA PANHANDLE
  SOUTHWESTERN GEORGIA
  COASTAL WATERS

* EFFECTIVE THIS MONDAY MORNING FROM 135 AM UNTIL 900 AM CST.

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

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST OF
PENSACOLA FLORIDA TO 35 MILES NORTH NORTHEAST OF TALLAHASSEE
FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 551...

DISCUSSION...LOW-CAPE/HIGH-SHEAR REGIME IS EXPECTED TO SPREAD INLAND
AND EWD ALONG GULF COASTAL PLAIN AND ACROSS WW AREA WITH
TIME...SUPPORTING POTENTIAL FOR EMBEDDED SUPERCELLS IN PRIMARY
CONVECTIVE BAND NEAR COLD FRONT...AND ALSO MORE DISCRETE SUPERCELLS
MOVING ASHORE FROM GULF.  REF SPC MESOSCALE DISCUSSION 1915 FOR MORE
METEOROLOGICAL DETAILS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 23030.


...EDWARDS

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 16, 8:43 PM CSTMesoscale DiscussionSPCWashington62 min
Nov 16, 9:49 PM CSTTornado WatchSPCMobile, Washington7 hr
Nov 16, 11:50 PM CSTMesoscale DiscussionSPCChoctaw, Clarke, Escambia, Monroe, Washington55 min
Nov 17, 1:13 AM CSTMesoscale DiscussionSPCBaldwin, Barbour, Butler, Coffee, Conecuh, Covington and 8 more32 min
Nov 17, 2:21 AM CSTMesoscale DiscussionSPCMobile, Washington114 min
Nov 17, 4:39 AM CSTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 9 more66 min
Nov 17, 7:43 AM CSTMesoscale DiscussionSPCBarbour, Dale, Geneva, Henry, Houston92 min
Nov 17, 5:11 AM CSTTornado WatchSPCColumbia, Dixie, Franklin, Gadsden, Hamilton, Jefferson and 7 more8 hr
Nov 17, 9:57 AM CSTTornado WatchSPCAlachua, Baker, Bradford, Clay, Duval, Flagler and 5 more4 hr
Nov 17, 11:14 AM CSTMesoscale DiscussionSPCBrevard, Citrus, Dixie, Flagler, Hernando, Hillsborough and 11 more2 hr
Nov 17, 11:30 AM CSTTornado WatchSPCBrevard, Charlotte, Citrus, DeSoto, Hardee, Hernando and 16 more6 hr
Nov 17, 2:10 PM CSTMesoscale DiscussionSPCDeSoto, Hardee, Highlands, Hillsborough, Lake, Manatee and 5 more65 min

Nearby

Tornado Watches in Alabama, 2014Tornado Watches in Florida, 2014Tornado Watches in Georgia, 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.