Alert archive / Florida / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 199

April 22, 200515 counties in Florida; Decatur County, Echols County, Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Apr 22, 2005, 11:15 PM CDT for 15 counties in Florida; Decatur County, Echols County, Georgia. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 22, 2005, 11:15 PM CDT (04:15 UTC)
Expired
Apr 23, 2005, 3:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center

Counties Calhoun County, FL, Columbia County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Decatur County, GA, Echols County, GA

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, 4.3 hours before the alert went out and 5 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 2005-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 407 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 2005-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.193958Sfc1 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
407 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1494 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 22, 8:28 PM CDTMesoscale DiscussionSPCEscambia, Santa Rosa2 hr
Apr 22, 9:15 PM CDTMesoscale DiscussionSPCBaker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more60 min
Apr 22, 10:58 PM CDTMesoscale DiscussionSPCBaker, Calhoun, Columbia, Franklin, Gadsden, Gilchrist and 9 more32 min
Apr 23, 2:28 AM CDTMesoscale DiscussionSPCAlachua, Bay, Bradford, Calhoun, Dixie, Flagler and 18 more92 min
Apr 22, 8:50 PM CDTSevere Thunderstorm WatchSPCCarroll, Chattahoochee, Coweta, Douglas, Fayette, Haralson and 10 more5 hr
Apr 22, 9:43 PM CDTMesoscale DiscussionSPCCobb, Forsyth, Paulding, Polk62 min
Apr 22, 10:01 PM CDTMesoscale DiscussionSPCAtkinson, Baker, Berrien, Brooks, Calhoun, Charlton and 23 more89 min
Apr 22, 11:14 PM CDTMesoscale DiscussionSPCCarroll, Clayton, Coweta, Douglas, Fayette, Fulton and 7 more91 min

Nearby

Severe Thunderstorm Watches in Florida, 2005Severe Thunderstorm Watches in Georgia, 2005Every severe thunderstorm watch in 2005

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.