Alert archive / Florida / Mesoscale Discussions in 2015

Mesoscale Discussion 102

February 25, 20158 counties in Florida; 5 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Feb 25, 2015, 10:48 PM EST for 8 counties in Florida; 5 counties in Georgia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Feb 25, 2015, 10:48 PM EST (03:48 UTC)
Expired: Feb 26, 2015, 12:15 AM EST
In force: 87 min
Issued by: the Storm Prediction Center

Counties Baker County, FL, Columbia County, FL, Hamilton County, FL, Lafayette County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Ware County, GA

The radar

The Moody AFB radar (KVAX), 44 km from the middle of the area, began a volume at 03:48 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

Jacksonville, FL (KJAX), launched 00:00Z, 3.8 hours before the alert went out and 97 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: 416 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 459 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Feb 25, 8:29 PM EST	Mesoscale Discussion	SPC	Calhoun, Dixie, Gadsden, Hamilton, Jefferson, Lafayette and 6 more	91 min
Feb 26, 2:14 AM EST	Mesoscale Discussion	SPC	Alachua, Bradford, Citrus, Clay, Hernando, Hillsborough and 8 more	91 min

Nearby

Mesoscale Discussions in Florida, 2015 Mesoscale Discussions in Georgia, 2015 Every mesoscale discussion in 2015

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.