Alert archive / Florida / Mesoscale Discussions in 2019
Mesoscale Discussion 412
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2019, 7:11 PM EDT for 6 counties in Florida. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2019, 7:11 PM EDT (23:11 UTC)
- Expired
- Apr 19, 2019, 8:45 PM EDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
Counties Broward County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL, Saint Lucie County, FL
The radar
The Miami radar (KAMX), 48 km from the middle of the area, began a volume at 23:11 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
Tampa Bay, FL (KTBW), launched 12:00Z, 11.2 hours before the alert went out and 268 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
- 1105 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 253 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 10.7
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 18, 9:54 PM EDT | Mesoscale Discussion | SPC | Calhoun, Holmes, Jackson, Walton, Washington | 96 min |
| Apr 19, 12:44 AM EDT | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington | 2 hr |
| Apr 19, 1:33 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more | 9 hr |
| Apr 19, 3:42 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more | 2 hr |
| Apr 19, 6:28 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 4 more | 2 hr |
| Apr 19, 9:09 AM EDT | Mesoscale Discussion | SPC | Columbia, Dixie, Gadsden, Gilchrist, Hamilton, Jefferson and 6 more | 2 hr |
| Apr 19, 10:13 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 21 more | 6 hr |
| Apr 19, 1:20 PM EDT | Mesoscale Discussion | SPC | Brevard, Charlotte, Citrus, Clay, Collier, DeSoto and 25 more | 85 min |
| Apr 19, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | Brevard, Charlotte, Collier, DeSoto, Glades, Hardee and 16 more | 8 hr |
| Apr 19, 3:40 PM EDT | Mesoscale Discussion | SPC | Brevard, Charlotte, DeSoto, Glades, Hardee, Hendry and 12 more | 95 min |
Nearby
Mesoscale Discussions in Florida, 2019Every mesoscale discussion in 2019
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.