Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 387

March 25, 20058 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Mar 25, 2005, 11:07 AM EST for 8 counties in Florida. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Mar 25, 2005, 11:07 AM EST (16:07 UTC)
Expired: Mar 25, 2005, 1:00 PM EST
In force: 113 min
Issued by: the Storm Prediction Center

Counties Alachua County, FL, Citrus County, FL, Dixie County, FL, Gilchrist County, FL, Lafayette County, FL, Levy County, FL, Marion County, FL, Taylor County, FL

The radar

The Jacksonville radar (KJAX), 140 km from the middle of the area, began a volume at 16:10 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 81Mar 25, 12:05 PM EST

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.1 hours before the alert went out and 194 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: 243 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 535 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 346 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.4

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
Mar 24, 11:26 PM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Gulf, Liberty, Okaloosa, Taylor and 3 more	3 hr
Mar 25, 2:55 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bay, Bradford, Brevard, Calhoun and 39 more	95 min
Mar 25, 5:35 AM EST	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bay, Bradford, Calhoun, Clay and 26 more	7 hr
Mar 25, 8:05 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 34 more	85 min
Mar 25, 12:05 PM EST	Severe Thunderstorm Watch	SPC	Brevard, Charlotte, Citrus, DeSoto, Flagler, Glades and 19 more	6 hr
Mar 25, 3:14 PM EST	Mesoscale Discussion	SPC	Brevard, Lake, Martin, Orange, Seminole, Sumter	2 hr

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.