Alert archive / Florida / Mesoscale Discussions in 2009
Mesoscale Discussion 2183
The Storm Prediction Center issued this mesoscale discussion at Dec 1, 2009, 11:10 PM CST for 4 counties in Alabama; 14 counties in Florida. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 1, 2009, 11:10 PM CST (05:10 UTC)
- Expired
- Dec 2, 2009, 1:15 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Baldwin County, AL, Covington County, AL, Escambia County, AL, Geneva County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL
The radar
The Eglin Afb radar (KEVX), 35 km from the middle of the area, began a volume at 05:10 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
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 5.2 hours before the alert went out and 191 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 598 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 306 m²/s²
- 0-3 km storm-relative helicity
- 388 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 |
|---|---|---|---|---|
| Dec 2, 3:11 AM CST | Tornado Watch | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more | 6 hr |
| Dec 2, 5:02 AM CST | Mesoscale Discussion | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more | 58 min |
| Dec 2, 8:52 AM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Columbia, Dixie, Gilchrist and 9 more | 83 min |
| Dec 2, 9:32 AM CST | Tornado Watch | SPC | Columbia, Dixie, Franklin, Gadsden, Gilchrist, Hamilton and 8 more | 6 hr |
| Dec 2, 11:48 AM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Columbia, Dixie, Gilchrist and 9 more | 117 min |
| Dec 2, 1:46 PM CST | Tornado Watch | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 14 more | 7 hr |
| Dec 2, 5:39 PM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 12 more | 96 min |
Nearby
Mesoscale Discussions in Florida, 2009Mesoscale Discussions in Alabama, 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; radar from the NEXRAD Level II archive.