Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 515

April 7, 20058 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2005, 3:53 AM CDT for 8 counties in Florida. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 7, 2005, 3:53 AM CDT (08:53 UTC)
Expired: Apr 7, 2005, 6:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Gulf County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 31 km from the middle of the area, began a volume at 09:14 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.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.9 hours before the alert went out and 31 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1032 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 58 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.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 6, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	Bay, Calhoun, Gulf, Holmes, Jackson, Walton and 1 more	4 hr
Apr 6, 10:36 PM CDT	Mesoscale Discussion	SPC	Bay, Calhoun, Gulf, Holmes, Jackson, Walton and 1 more	54 min
Apr 7, 7:52 AM CDT	Mesoscale Discussion	SPC	Alachua, Citrus, Columbia, Dixie, Gilchrist, Lafayette and 4 more	113 min
Apr 7, 10:25 AM CDT	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bradford, Citrus, Clay, Columbia and 17 more	8 hr
Apr 7, 12:00 PM CDT	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Citrus, Clay, Columbia and 17 more	2 hr
Apr 7, 3:18 PM CDT	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 36 more	87 min
Apr 7, 4:50 PM CDT	Severe Thunderstorm Watch	SPC	Brevard, Charlotte, Citrus, DeSoto, Glades, Hardee and 20 more	6 hr
Apr 7, 6:20 PM CDT	Mesoscale Discussion	SPC	Brevard, Charlotte, Collier, DeSoto, Glades, Hardee and 17 more	55 min

Nearby

Mesoscale Discussions in Florida, 2005 Every mesoscale discussion 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.