Alert archive / Florida / Tornado Watches in 2009
Tornado Watch 787
The Storm Prediction Center issued this tornado watch at Dec 2, 2009, 3:11 AM CST for 10 counties in Alabama; 15 counties in Florida; 14 counties in Georgia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 2, 2009, 3:11 AM CST (09:11 UTC)
- Expired
- Dec 2, 2009, 9:33 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 39 counties
Baldwin County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile 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, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA
The radar
The Eglin Afb radar (KEVX), 60 km from the middle of the area, began a volume at 09:15 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 2, 4:26 AM CST | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 49 min |
| Dec 2, 5:05 AM CST | Severe Thunderstorm Warning | MOB | Conecuh, Covington, Crenshaw, Escambia | 40 min |
| Dec 2, 5:15 AM CST | Severe Thunderstorm Warning | TAE | Coffee, Geneva | 49 min |
| Dec 2, 5:41 AM CST | Tornado Warning | TAE | Bay | 45 min |
| Dec 2, 6:54 AM CST | Severe Thunderstorm Warning | MOB | Covington, Escambia | 51 min |
| Dec 2, 7:04 AM CST | Tornado Warning | MOB | Okaloosa | 41 min |
| Dec 2, 7:14 AM CST | Tornado Warning | TAE | Houston | 31 min |
| Dec 2, 7:26 AM CST | Tornado Warning | TAE | Houston | 34 min |
| Dec 2, 7:35 AM CST | Flash Flood Warning | MOB | Okaloosa, Santa Rosa | 115 min |
| Dec 2, 7:51 AM CST | Tornado Warning | TAE | Early, Miller | 24 min |
| Dec 2, 8:00 AM CST | Tornado Warning | TAE | Bay, Franklin, Gulf | 45 min |
| Dec 2, 8:25 AM CST | Tornado Warning | TAE | Geneva | 23 min |
| Dec 2, 9:04 AM CST | Tornado Warning | TAE | Leon, Liberty, Wakulla | 26 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.2 hours before the alert went out and 216 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
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 1, 11:10 PM CST | Mesoscale Discussion | SPC | Baldwin, Covington, Escambia, Geneva | 2 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 |
| Dec 2, 12:31 PM CST | Mesoscale Discussion | SPC | Baldwin, Bleckley, Bryan, Bulloch, Burke, Candler and 23 more | 89 min |
| Dec 2, 1:08 PM CST | Tornado Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 11 more | 8 hr |
| Dec 2, 4:44 PM CST | Mesoscale Discussion | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 11 more | 91 min |
Nearby
Tornado Watches in Florida, 2009Tornado Watches in Georgia, 2009Tornado Watches in Alabama, 2009Every tornado watch 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.