Alert archive / Florida / Mesoscale Discussions in 2020

Mesoscale Discussion 278

March 31, 20207 counties in Florida; Camden County, Charlton County, Echols County, Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2020, 4:40 PM EDT for 7 counties in Florida; Camden County, Charlton County, Echols County, Georgia. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2020, 4:40 PM EDT (20:40 UTC)
Expired: Mar 31, 2020, 5:45 PM EDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Baker County, FL, Columbia County, FL, Hamilton County, FL, Lafayette County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Camden County, GA, Charlton County, GA, Echols County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.7 hours before the alert went out and 118 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: 734 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 9:51 AM EDT	Tornado Watch	SPC	Bay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 7 more	6 hr
Mar 31, 11:42 AM EDT	Mesoscale Discussion	SPC	Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more	93 min
Mar 31, 1:09 PM EDT	Mesoscale Discussion	SPC	Calhoun, Gadsden, Holmes, Jackson, Jefferson, Leon and 4 more	96 min
Mar 31, 2:22 PM EDT	Tornado Watch	SPC	Baker, Bradford, Clay, Columbia, Dixie, Duval and 14 more	6 hr
Mar 31, 6:38 PM EDT	Mesoscale Discussion	SPC	Alachua, Clay, Putnam, Saint Johns	67 min
Mar 31, 12:20 PM EDT	Mesoscale Discussion	SPC	Burke, Columbia, Glascock, Jefferson, Lincoln, McDuffie and 4 more	85 min

Nearby

Mesoscale Discussions in Florida, 2020 Mesoscale Discussions in Georgia, 2020 Every mesoscale discussion in 2020

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.