Alert archive / Florida / Mesoscale Discussions in 2011
Mesoscale Discussion 44
The Storm Prediction Center issued this mesoscale discussion at Jan 25, 2011, 1:19 PM EST for 33 counties in Florida. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Jan 25, 2011, 1:19 PM EST (18:19 UTC)
- Expired
- Jan 25, 2011, 2:15 PM EST
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 33 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, DeSoto County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Nassau 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, Union County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 152 km from the middle of the area, began a volume at 18:23 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
Tampa Bay, FL (KTBW), launched 12:00Z, 6.3 hours before the alert went out and 152 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
- 5 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 368 m²/s²
- 0-3 km storm-relative helicity
- 493 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 |
|---|---|---|---|---|
| Jan 25, 2:07 PM EST | Tornado Watch | SPC | Alachua, Bradford, Brevard, Charlotte, Citrus, Clay and 28 more | 7 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.