Alert archive / Florida / Mesoscale Discussions in 2007
Mesoscale Discussion 501
The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2007, 9:31 AM EDT for 28 counties in Florida. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2007, 9:31 AM EDT (13:31 UTC)
- Expired
- Apr 15, 2007, 10:30 AM EDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 28 counties
Brevard County, FL, Broward County, FL, Charlotte County, FL, Collier County, FL, DeSoto County, FL, Flagler County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Manatee County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Polk County, FL, Saint Lucie County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Miami radar (KAMX), 138 km from the middle of the area, began a volume at 13:33 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 1.5 hours before the alert went out and 170 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
- 1470 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 579 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 331 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 2.9
- Supercell composite
- 12.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 8:09 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 12 more | 2 hr |
| Apr 14, 11:45 PM EDT | Tornado Watch | SPC | Calhoun, Franklin, Gadsden, Gulf, Jackson, Jefferson and 4 more | 6 hr |
| Apr 15, 2:27 AM EDT | Mesoscale Discussion | SPC | Alachua, Citrus, Dixie, Franklin, Gilchrist, Hernando and 4 more | 2 hr |
| Apr 15, 9:45 AM EDT | Tornado Watch | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 18 more | 7 hr |
| Apr 15, 1:03 PM EDT | Mesoscale Discussion | SPC | Broward, Collier, Glades, Hendry, Highlands, Indian River and 7 more | 117 min |
| Apr 15, 3:42 PM EDT | Mesoscale Discussion | SPC | Broward, Miami-Dade, Monroe, Palm Beach | 93 min |
Nearby
Mesoscale Discussions in Florida, 2007Every mesoscale discussion in 2007
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.