Alert archive / Florida / Mesoscale Discussions in 2023

Mesoscale Discussion 628

April 26, 20236 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2023, 6:15 PM EDT for 6 counties in Florida. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Apr 26, 2023, 6:15 PM EDT (22:15 UTC)
Expired: Apr 26, 2023, 7:45 PM EDT
In force: 90 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Bradford County, FL, Clay County, FL, Duval County, FL, Nassau County, FL, Saint Johns County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 43 km from the middle of the area, began a volume at 22:18 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.3 hours before the alert went out and 221 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: 1333 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
Apr 26, 1:14 PM EDT	Mesoscale Discussion	SPC	Alachua, Brevard, Broward, Flagler, Glades, Hardee and 16 more	2 hr
Apr 26, 2:07 PM EDT	Severe Thunderstorm Watch	SPC	Alachua, Brevard, Broward, DeSoto, Flagler, Glades and 18 more	8 hr
Apr 26, 4:33 PM EDT	Mesoscale Discussion	SPC	Brevard, Broward, DeSoto, Glades, Hardee, Hendry and 16 more	117 min
Apr 26, 5:34 PM EDT	Mesoscale Discussion	SPC	DeSoto, Hardee, Highlands, Polk, Sumter	86 min
Apr 26, 7:37 PM EDT	Mesoscale Discussion	SPC	Alachua, Bradford, Columbia, Gilchrist, Hamilton, Lafayette and 11 more	83 min

Nearby

Mesoscale Discussions in Florida, 2023 Every mesoscale discussion in 2023

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.