Alert archive / Florida / Mesoscale Discussions in 2011
Mesoscale Discussion 318
The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2011, 3:32 PM EDT for 23 counties in Florida. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2011, 3:32 PM EDT (19:32 UTC)
- Expired
- Mar 30, 2011, 4:30 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 23 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hernando County, FL, Lake County, FL, Levy County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Union County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 163 km from the middle of the area, began a volume at 19:33 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 nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 7.5 hours before the alert went out and 163 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
- 681 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 723 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.0
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 |
|---|---|---|---|---|
| Mar 30, 2:51 AM EDT | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa, Walton | 114 min |
| Mar 30, 5:07 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Escambia, Franklin, Gulf, Holmes and 6 more | 6 hr |
| Mar 30, 8:28 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 26 more | 2 hr |
| Mar 30, 11:10 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 27 more | 8 hr |
| Mar 30, 4:41 PM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Orange, Osceola, Polk, Seminole and 1 more | 2 hr |
Nearby
Mesoscale Discussions in Florida, 2011Every mesoscale discussion in 2011
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.