Alert archive / Florida / Mesoscale Discussions in 2012
Mesoscale Discussion 1818
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2012, 3:44 AM EDT for 22 counties in Florida. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2012, 3:44 AM EDT (07:44 UTC)
- Expired
- Aug 27, 2012, 5:45 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 22 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, Osceola 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), 127 km from the middle of the area, began a volume at 07:46 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
Miami, FL (KMFL), launched 00:00Z, 7.7 hours before the alert went out and 132 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
- 2399 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
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 26, 10:44 PM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hendry and 4 more | 2 hr |
| Aug 26, 11:24 PM EDT | Tornado Watch | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 17 more | 12 hr |
| Aug 27, 7:26 AM EDT | Mesoscale Discussion | SPC | Brevard, Citrus, Dixie, Gilchrist, Hernando, Indian River and 13 more | 3 hr |
| Aug 27, 7:55 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 16 more | 95 min |
| Aug 27, 11:54 AM EDT | Mesoscale Discussion | SPC | Indian River, Lake, Marion, Orange, Osceola, Saint Lucie and 3 more | 2 hr |
| Aug 27, 2:28 PM EDT | Mesoscale Discussion | SPC | Citrus, DeSoto, Hardee, Hernando, Highlands, Hillsborough and 6 more | 92 min |
Nearby
Mesoscale Discussions in Florida, 2012Every mesoscale discussion in 2012
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.