Alert archive / Florida / Mesoscale Discussions in 2012
Mesoscale Discussion 1261
The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2012, 4:36 PM EDT for 21 counties in Florida. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2012, 4:36 PM EDT (20:36 UTC)
- Expired
- Jun 24, 2012, 6:30 PM EDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 21 counties
Broward County, FL, Charlotte County, FL, Citrus County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Martin County, FL, Palm Beach County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Sumter County, FL
The radar
The Tampa radar (KTBW), 51 km from the middle of the area, began a volume at 20:37 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
Cape Canaveral, FL (KXMR), launched 12:00Z, 8.6 hours before the alert went out and 160 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
- 400 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 926 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -25 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 |
|---|---|---|---|---|
| Jun 23, 8:09 PM EDT | Mesoscale Discussion | SPC | Charlotte, Collier, Lee, Manatee, Pinellas, Sarasota | 66 min |
| Jun 24, 11:02 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Citrus, Collier, DeSoto, Dixie and 16 more | 2 hr |
| Jun 24, 11:47 AM EDT | Tornado Watch | SPC | Broward, Charlotte, Citrus, Collier, DeSoto, Glades and 16 more | 8 hr |
| Jun 24, 7:01 PM EDT | Mesoscale Discussion | SPC | Charlotte, Citrus, DeSoto, Dixie, Gilchrist, Glades and 17 more | 59 min |
| Jun 24, 7:46 PM EDT | Tornado Watch | SPC | Alachua, Brevard, Charlotte, Citrus, Collier, DeSoto and 28 more | 9 hr |
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.