Alert archive / Florida / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 82

April 14, 20149 counties in Alabama; 13 counties in Florida; 8 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Apr 14, 2014, 7:49 PM CDT for 9 counties in Alabama; 13 counties in Florida; 8 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 14, 2014, 7:49 PM CDT (00:49 UTC)
Expired
Apr 15, 2014, 2:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
65 kt
All 30 counties

Baldwin County, AL, Coffee County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile 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, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Calhoun County, GA, Clay County, GA, Decatur County, GA, Early County, GA, Miller County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA

The radar

The Eglin Afb radar (KEVX), 76 km from the middle of the area, began a volume at 00:52 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
20%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
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
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 14, 7:57 PM CDTFlash Flood WarningMOBBaldwin3 hr
Apr 14, 8:23 PM CDTFlash Flood WarningMOBMobile3 hr
Apr 14, 8:28 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia62 min
Apr 14, 8:48 PM CDTFlash Flood WarningMOBEscambia, Santa Rosa117 min
Apr 14, 8:50 PM CDTSevere Thunderstorm WarningMOBOkaloosa55 min
Apr 14, 9:00 PM CDTSevere Thunderstorm WarningTAEWalton30 min
Apr 14, 9:40 PM CDTFlash Flood WarningMOBBaldwin3 hr
Apr 14, 10:06 PM CDTFlash Flood WarningMOBEscambia, Okaloosa, Santa Rosa3 hr
Apr 14, 10:50 PM CDTFlash Flood WarningTAEHolmes, Walton, Washington3 hr
Apr 14, 10:54 PM CDTFlash Flood WarningMOBOkaloosa, Santa Rosa3 hr
Apr 14, 11:48 PM CDTFlash Flood WarningTAEJackson, Washington4 hr
Apr 15, 1:39 AM CDTFlash Flood WarningTAEWalton, Washington3 hr

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, 0.8 hours before the alert went out and 232 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 2014-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 2014-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
127 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 7:00 PM CDTMesoscale DiscussionSPCBaldwin, Covington, Escambia, Mobile60 min
Apr 14, 9:45 PM CDTMesoscale DiscussionSPCBaldwin, Coffee, Covington, Dale, Escambia, Geneva and 3 more60 min
Apr 15, 1:30 AM CDTMesoscale DiscussionSPCGeneva, Houston60 min
Apr 15, 3:58 AM CDTMesoscale DiscussionSPCCalhoun, Jefferson, Leon, Liberty62 min
Apr 15, 11:29 AM CDTMesoscale DiscussionSPCBrevard, Citrus, Flagler, Hardee, Hernando, Hillsborough and 13 more3 hr

Nearby

Severe Thunderstorm Watches in Florida, 2014Severe Thunderstorm Watches in Alabama, 2014Severe Thunderstorm Watches in Georgia, 2014Every severe thunderstorm 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.