Alert archive / Florida / Mesoscale Discussions in 2018
Mesoscale Discussion 928
The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2018, 7:22 PM EDT for 23 counties in Florida; 11 counties in Georgia. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2018, 7:22 PM EDT (23:22 UTC)
- Expired
- Jun 28, 2018, 8:45 PM EDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 34 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Levy County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Decatur County, GA, Echols County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Thomas County, GA, Ware County, GA
The radar
The Moody AFB radar (KVAX), 80 km from the middle of the area, began a volume at 23:24 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 12:00Z, 11.4 hours before the alert went out and 115 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.
- Mixed-layer CAPE
- 1691 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 5:34 PM EDT | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton | 86 min |
| Jun 28, 5:59 PM EDT | Severe Thunderstorm Watch | SPC | Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more | 7 hr |
| Jun 28, 11:22 AM EDT | Mesoscale Discussion | SPC | Bartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 14 more | 113 min |
| Jun 28, 11:46 AM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Bartow, Bibb, Butts, Carroll, Chattooga and 49 more | 8 hr |
| Jun 28, 2:07 PM EDT | Mesoscale Discussion | SPC | Carroll, Chattahoochee, Coweta, Crawford, Crisp, Dooly and 21 more | 113 min |
Nearby
Mesoscale Discussions in Florida, 2018Mesoscale Discussions in Georgia, 2018Every mesoscale discussion in 2018
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.