Alert archive / Georgia / Tornado Watches in 2009

Tornado Watch 150

April 13, 200911 counties in Florida; 25 counties in Georgia

The Storm Prediction Center issued this tornado watch at Apr 13, 2009, 12:32 PM EDT for 11 counties in Florida; 25 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 13, 2009, 12:32 PM EDT (16:32 UTC)
Expired
Apr 13, 2009, 7:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 36 counties

Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Gilchrist County, FL, Hamilton County, FL, Nassau County, FL, Saint Johns County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 13, 12:44 PM EDTTornado WarningFFCTelfair48 min
Apr 13, 12:51 PM EDTTornado WarningJAXCoffee, Jeff Davis39 min
Apr 13, 1:07 PM EDTSevere Thunderstorm WarningFFCMontgomery, Wheeler38 min
Apr 13, 1:23 PM EDTTornado WarningJAXJeff Davis37 min
Apr 13, 1:28 PM EDTSevere Thunderstorm WarningFFCToombs47 min
Apr 13, 1:37 PM EDTTornado WarningJAXCoffee38 min
Apr 13, 1:51 PM EDTSevere Thunderstorm WarningJAXAppling39 min
Apr 13, 2:03 PM EDTTornado WarningJAXCoffee, Jeff Davis42 min
Apr 13, 2:19 PM EDTTornado WarningJAXAppling, Jeff Davis41 min
Apr 13, 2:25 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee39 min
Apr 13, 2:29 PM EDTSevere Thunderstorm WarningCHSTattnall46 min
Apr 13, 2:40 PM EDTTornado WarningCHSTattnall22 min
Apr 13, 2:41 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee24 min
Apr 13, 2:47 PM EDTTornado WarningJAXAppling20 min
Apr 13, 3:00 PM EDTSevere Thunderstorm WarningCHSLong, Tattnall60 min
Apr 13, 3:03 PM EDTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Brantley, Coffee, Pierce and 2 more43 min
Apr 13, 3:04 PM EDTTornado WarningJAXAppling, Wayne41 min
Apr 13, 3:16 PM EDTTornado WarningCHSLong, Tattnall44 min
Apr 13, 3:23 PM EDTTornado WarningJAXAppling, Bacon, Pierce, Ware22 min
Apr 13, 3:28 PM EDTSevere Thunderstorm WarningCHSBryan, Liberty, Long, Tattnall62 min
Apr 13, 3:39 PM EDTSevere Thunderstorm WarningJAXClinch, Echols, Ware41 min
Apr 13, 3:40 PM EDTTornado WarningCHSLiberty, Long50 min
Apr 13, 3:44 PM EDTTornado WarningJAXAppling, Pierce, Wayne46 min
Apr 13, 4:07 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Effingham, Liberty53 min
Apr 13, 4:08 PM EDTSevere Thunderstorm WarningCHSLiberty, Long, McIntosh67 min
Apr 13, 4:14 PM EDTTornado WarningCHSBryan, Chatham, Liberty46 min
Apr 13, 4:16 PM EDTTornado WarningCHSLiberty, Long, McIntosh44 min
Apr 13, 4:19 PM EDTSevere Thunderstorm WarningJAXBrantley, Charlton, Clinch, Pierce, Ware35 min
Apr 13, 4:25 PM EDTTornado WarningJAXBrantley, Charlton, Clinch, Ware44 min
Apr 13, 4:42 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty, McIntosh63 min
Apr 13, 4:50 PM EDTTornado WarningCHSLiberty, McIntosh40 min
Apr 13, 4:56 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty64 min
Apr 13, 5:07 PM EDTTornado WarningJAXBrantley, Camden, Charlton, Glynn53 min
Apr 13, 5:32 PM EDTSevere Thunderstorm WarningJAXNassau43 min
Apr 13, 5:58 PM EDTTornado WarningJAXCamden50 min
Apr 13, 6:30 PM EDTTornado WarningJAXFlagler, Putnam, Saint Johns60 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

Jacksonville, FL (KJAX), launched 12:00Z, 4.5 hours before the alert went out and 102 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, Jacksonville, FL at 12:00Z on 2009-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Jacksonville, FL at 12:00Z on 2009-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
3 J/kg
Mixed-layer CIN
-232 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 11:42 PM EDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa93 min
Apr 13, 12:01 AM EDTTornado WatchSPCEscambia, Okaloosa, Santa Rosa4 hr
Apr 13, 2:57 AM EDTMesoscale DiscussionSPCBay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 6 more63 min
Apr 13, 3:33 AM EDTTornado WatchSPCBay, Calhoun, Escambia, Holmes, Jackson, Okaloosa and 3 more7 hr
Apr 13, 5:32 AM EDTMesoscale DiscussionSPCEscambia, Holmes, Okaloosa, Santa Rosa, Walton58 min
Apr 13, 8:27 AM EDTMesoscale DiscussionSPCCalhoun, Escambia, Gadsden, Holmes, Jackson, Leon and 5 more2 hr
Apr 13, 10:12 AM EDTTornado WatchSPCBay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more9 hr
Apr 13, 12:15 PM EDTMesoscale DiscussionSPCBaker, Bay, Bradford, Calhoun, Columbia, Dixie and 23 more90 min
Apr 13, 6:22 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 18 more83 min
Apr 13, 6:53 PM EDTTornado WatchSPCAlachua, Baker, Bradford, Calhoun, Clay, Columbia and 22 more5 hr
Apr 13, 6:52 PM EDTMesoscale DiscussionSPCCatoosa, Chattooga, Dade, Walker, Whitfield53 min

Nearby

Tornado Watches in Georgia, 2009Tornado Watches in Florida, 2009Every tornado watch in 2009

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.