Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 253

March 2, 20076 counties in Florida; 8 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2007, 2:33 AM EST for 6 counties in Florida; 8 counties in Georgia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Mar 2, 2007, 2:33 AM EST (07:33 UTC)
Expired: Mar 2, 2007, 4:00 AM EST
In force: 87 min
Issued by: the Storm Prediction Center

Counties Franklin County, FL, Jefferson County, FL, Leon County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Atkinson County, GA, Berrien County, GA, Brooks County, GA, Coffee County, GA, Cook County, GA, Jeff Davis County, GA, Lanier County, GA, Lowndes County, GA

The radar

The Tallahassee radar (KTLH), 30 km from the middle of the area, began a volume at 07:36 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, 7.6 hours before the alert went out and 28 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: 0 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 444 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.8

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 1, 8:39 PM EST	Tornado Watch	SPC	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 12 more	8 hr
Mar 1, 10:11 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Brevard, Citrus, Clay and 18 more	94 min
Mar 2, 12:54 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 10 more	7 hr
Mar 2, 4:13 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 10 more	62 min
Mar 2, 6:21 AM EST	Mesoscale Discussion	SPC	Alachua, Bradford, Citrus, Clay, Duval, Flagler and 13 more	84 min
Mar 2, 10:54 AM EST	Mesoscale Discussion	SPC	Flagler, Hernando, Hillsborough, Lake, Orange, Pasco and 3 more	2 hr
Mar 1, 8:27 PM EST	Tornado Watch	SPC	Burke, Columbia, Elbert, Franklin, Habersham, Hart and 5 more	9 hr
Mar 2, 3:00 AM EST	Mesoscale Discussion	SPC	Richmond	90 min

Nearby

Mesoscale Discussions in Georgia, 2007 Mesoscale Discussions in Florida, 2007 Every mesoscale discussion in 2007

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.