Alert archive / Florida / Mesoscale Discussions in 2017
Mesoscale Discussion 425
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2017, 6:57 PM EDT for 23 counties in Florida. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2017, 6:57 PM EDT (22:57 UTC)
- Expired
- Apr 3, 2017, 8:30 PM EDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 23 counties
Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Franklin County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Lake County, FL, Liberty County, FL, Madison County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Wakulla County, FL
The radar
The Jacksonville radar (KJAX), 125 km from the middle of the area, began a volume at 22:59 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 12:00Z, 11.0 hours before the alert went out and 127 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
- 546 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 715 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.9
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 |
|---|---|---|---|---|
| Apr 3, 7:43 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa and 3 more | 2 hr |
| Apr 3, 8:06 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more | 6 hr |
| Apr 3, 10:25 AM EDT | Mesoscale Discussion | SPC | Gadsden, Holmes, Jackson, Washington | 65 min |
| Apr 3, 1:32 PM EDT | Tornado Watch | SPC | Calhoun, Dixie, Franklin, Gadsden, Gulf, Jefferson and 6 more | 6 hr |
| Apr 3, 3:21 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jefferson and 5 more | 54 min |
Nearby
Mesoscale Discussions in Florida, 2017Every mesoscale discussion in 2017
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.