Alert archive / Florida / Mesoscale Discussions in 2009
Mesoscale Discussion 295
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2009, 1:11 PM EDT for 18 counties in Florida; 7 counties in Georgia. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2009, 1:11 PM EDT (17:11 UTC)
- Expired
- Mar 27, 2009, 2:15 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 25 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Levy County, FL, Madison County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Lanier County, GA, Lowndes County, GA, Ware County, GA
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.2 hours before the alert went out and 153 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
- 31 J/kg
- Mixed-layer CIN
- -249 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 27, 12:53 AM EDT | Mesoscale Discussion | SPC | Escambia | 97 min |
| Mar 27, 1:48 AM EDT | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa | 7 hr |
| Mar 27, 3:23 AM EDT | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 67 min |
| Mar 27, 5:37 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more | 53 min |
| Mar 27, 6:02 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 6 more | 5 hr |
| Mar 27, 7:35 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Gulf, Holmes, Jackson, Okaloosa and 2 more | 55 min |
| Mar 27, 10:51 AM EDT | Mesoscale Discussion | SPC | Franklin, Gadsden, Gulf, Jefferson, Leon, Liberty and 3 more | 24 min |
| Mar 27, 11:05 AM EDT | Tornado Watch | SPC | Dixie, Franklin, Jefferson, Lafayette, Leon, Madison and 2 more | 3 hr |
Nearby
Mesoscale Discussions in Florida, 2009Mesoscale Discussions in Georgia, 2009Every mesoscale discussion in 2009
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.