Alert archive / Florida / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 138

April 7, 200526 counties in Florida

The Storm Prediction Center issued this severe thunderstorm watch at Apr 7, 2005, 5:50 PM EDT for 26 counties in Florida. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 7, 2005, 5:50 PM EDT (21:50 UTC)
Expired
Apr 8, 2005, 12:00 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 26 counties

Brevard County, FL, Charlotte County, FL, Citrus County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Manatee County, FL, Martin County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Saint Lucie County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 64 km from the middle of the area, began a volume at 21:50 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 7, 6:09 PM EDTSevere Thunderstorm WarningMLBOrange51 min
Apr 7, 6:17 PM EDTSevere Thunderstorm WarningMLBVolusia43 min
Apr 7, 6:24 PM EDTSevere Thunderstorm WarningTBWPolk21 min
Apr 7, 6:35 PM EDTSevere Thunderstorm WarningMLBBrevard40 min
Apr 7, 6:43 PM EDTTornado WarningMLBBrevard40 min
Apr 7, 7:24 PM EDTSevere Thunderstorm WarningMLBBrevard67 min
Apr 7, 8:53 PM EDTSevere Thunderstorm WarningMLBIndian River37 min
Apr 7, 8:57 PM EDTSevere Thunderstorm WarningMLBBrevard33 min
Apr 7, 9:16 PM EDTSevere Thunderstorm WarningTBWLee31 min
Apr 7, 10:32 PM EDTTornado WarningMLBSaint Lucie28 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

Tampa Bay, FL (KTBW), launched 12:00Z, 9.8 hours before the alert went out and 123 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, Tampa Bay, FL at 12:00Z on 2005-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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, Tampa Bay, FL at 12:00Z on 2005-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 237 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
31 J/kg
Mixed-layer CIN
-253 J/kg
Mixed-layer LCL
1011 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
237 m²/s²
0-3 km storm-relative helicity
309 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 6, 8:00 PM EDTSevere Thunderstorm WatchSPCBay, Calhoun, Gulf, Holmes, Jackson, Walton and 1 more4 hr
Apr 6, 11:36 PM EDTMesoscale DiscussionSPCBay, Calhoun, Gulf, Holmes, Jackson, Walton and 1 more54 min
Apr 7, 4:53 AM EDTMesoscale DiscussionSPCGulf, Jefferson, Lafayette, Leon, Liberty, Madison and 2 more2 hr
Apr 7, 8:52 AM EDTMesoscale DiscussionSPCAlachua, Citrus, Columbia, Dixie, Gilchrist, Lafayette and 4 more113 min
Apr 7, 11:25 AM EDTSevere Thunderstorm WatchSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 17 more8 hr
Apr 7, 1:00 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 17 more2 hr
Apr 7, 4:18 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Brevard, Charlotte, Citrus and 36 more87 min
Apr 7, 7:20 PM EDTMesoscale DiscussionSPCBrevard, Charlotte, Collier, DeSoto, Glades, Hardee and 17 more55 min

Nearby

Severe Thunderstorm Watches in Florida, 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; radar from the NEXRAD Level II archive.