Alert archive / Florida / Mesoscale Discussions in 2004
Mesoscale Discussion 1986
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2004, 6:46 AM EDT for 21 counties in Florida. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2004, 6:46 AM EDT (10:46 UTC)
- Expired
- Aug 13, 2004, 8:45 AM EDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 21 counties
Broward County, FL, Charlotte County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lee County, FL, Manatee County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Palm Beach County, FL, Pinellas County, FL, Polk County, FL, Saint Lucie County, FL, Sarasota County, FL
The radar
The Miami radar (KAMX), 152 km from the middle of the area, began a volume at 10:45 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
Miami, FL (KMFL), launched 00:00Z, 10.8 hours before the alert went out and 151 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
- 2493 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 1169 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Aug 12, 9:00 PM EDT | Mesoscale Discussion | SPC | Charlotte, Collier, Hendry, Lee, Miami-Dade, Monroe | 3 hr |
| Aug 12, 9:35 PM EDT | Tornado Watch | SPC | Broward, Charlotte, Collier, Glades, Hendry, Lee and 4 more | 10 hr |
| Aug 13, 2:21 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, Glades, Hendry, Lee and 4 more | 114 min |
| Aug 13, 7:30 AM EDT | Tornado Watch | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 15 more | 10 hr |
| Aug 13, 11:04 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 15 more | 86 min |
| Aug 13, 1:02 PM EDT | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 26 more | 88 min |
| Aug 13, 1:45 PM EDT | Tornado Watch | SPC | Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 29 more | 12 hr |
| Aug 13, 4:06 PM EDT | Mesoscale Discussion | SPC | Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 29 more | 84 min |
| Aug 13, 6:14 PM EDT | Mesoscale Discussion | SPC | Broward, Citrus, Collier, Glades, Hardee, Hendry and 14 more | 61 min |
Nearby
Mesoscale Discussions in Florida, 2004Every mesoscale discussion in 2004
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.