Alert archive / Florida / Mesoscale Discussions in 2012
Mesoscale Discussion 2151
The Storm Prediction Center issued this mesoscale discussion at Dec 10, 2012, 4:40 PM EST for 25 counties in Florida. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 10, 2012, 4:40 PM EST (21:40 UTC)
- Expired
- Dec 10, 2012, 6:45 PM EST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 25 counties
Brevard County, FL, Citrus County, FL, DeSoto County, FL, Flagler County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 9.7 hours before the alert went out and 95 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
- 18 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Dec 10, 11:24 AM EST | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 2 hr |
| Dec 10, 1:52 PM EST | Mesoscale Discussion | SPC | Bay, Escambia, Holmes, Okaloosa, Santa Rosa, Walton and 1 more | 113 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.