Alert archive / Alabama / Tornado Watches in 2015
Tornado Watch 575
The Storm Prediction Center issued this tornado watch at Dec 28, 2015, 6:41 AM CST for 33 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 28, 2015, 6:41 AM CST (12:41 UTC)
- Expired
- Dec 28, 2015, 11:16 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 36 counties
Autauga County, AL, Baldwin County, AL, Bibb County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Marion County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL
The radar
The Birmingham radar (KBMX), 118 km from the middle of the area, began a volume at 12:41 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- 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
- 60%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 28, 6:44 AM CST | Tornado Warning | MOB | Baldwin | 31 min |
| Dec 28, 6:59 AM CST | Tornado Warning | MOB | Washington | 46 min |
| Dec 28, 7:03 AM CST | Severe Thunderstorm Warning | MOB | Choctaw, Washington | 57 min |
| Dec 28, 7:14 AM CST | Tornado Warning | MOB | Baldwin, Escambia, Monroe | 46 min |
| Dec 28, 7:16 AM CST | Tornado Warning | MOB | Baldwin | 59 min |
| Dec 28, 7:18 AM CST | Tornado Warning | MOB | Choctaw | 42 min |
| Dec 28, 7:28 AM CST | Tornado Warning | MOB | Choctaw, Washington | 47 min |
| Dec 28, 7:48 AM CST | Tornado Warning | MOB | Monroe | 42 min |
| Dec 28, 8:00 AM CST | Tornado Warning | MOB | Escambia, Monroe | 30 min |
| Dec 28, 8:06 AM CST | Severe Thunderstorm Warning | MOB | Choctaw | 39 min |
| Dec 28, 8:09 AM CST | Tornado Warning | MOB | Monroe, Wilcox | 33 min |
| Dec 28, 8:13 AM CST | Severe Thunderstorm Warning | MOB | Baldwin, Choctaw, Clarke, Mobile, Washington | 62 min |
| Dec 28, 8:16 AM CST | Tornado Warning | MOB | Butler, Conecuh, Escambia, Monroe | 2 min |
| Dec 28, 8:19 AM CST | Tornado Warning | MOB | Escambia | 41 min |
| Dec 28, 8:36 AM CST | Severe Thunderstorm Warning | MOB | Monroe, Wilcox | 39 min |
| Dec 28, 8:39 AM CST | Tornado Warning | MOB | Escambia, Santa Rosa | 51 min |
| Dec 28, 8:59 AM CST | Severe Thunderstorm Warning | MOB | Conecuh, Escambia | 46 min |
| Dec 28, 9:04 AM CST | Severe Thunderstorm Warning | MOB | Butler, Conecuh, Monroe, Wilcox | 41 min |
| Dec 28, 9:06 AM CST | Tornado Warning | MOB | Baldwin | 39 min |
| Dec 28, 9:30 AM CST | Tornado Warning | MOB | Escambia, Santa Rosa | 45 min |
| Dec 28, 9:32 AM CST | Severe Thunderstorm Warning | MOB | Butler, Wilcox | 13 min |
| Dec 28, 9:43 AM CST | Tornado Warning | MOB | Escambia, Santa Rosa | 30 min |
| Dec 28, 10:01 AM CST | Severe Thunderstorm Warning | MOB | Conecuh, Escambia | 44 min |
| Dec 28, 10:27 AM CST | Tornado Warning | MOB | Escambia, Santa Rosa | 33 min |
| Dec 28, 10:54 AM CST | Tornado Warning | MOB | Santa Rosa | 15 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
Birmingham, AL (KBMX), launched 12:00Z, 0.7 hours before the alert went out and 117 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
- 144 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 330 m²/s²
- 0-3 km storm-relative helicity
- 377 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 28, 8:38 AM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more | 67 min |
| Dec 28, 10:21 AM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Butler and 34 more | 84 min |
| Dec 28, 11:04 AM CST | Tornado Watch | SPC | Butler, Coffee, Conecuh, Covington, Crenshaw, Dale and 4 more | 7 hr |
| Dec 28, 2:27 PM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Coffee, Dale, Geneva, Pike | 33 min |
| Dec 28, 3:31 PM CST | Mesoscale Discussion | SPC | Barbour, Russell | 29 min |
| Dec 28, 5:07 PM CST | Mesoscale Discussion | SPC | Houston | 53 min |
| Dec 27, 8:59 PM CST | Mesoscale Discussion | SPC | Adams | 91 min |
| Dec 27, 9:57 PM CST | Tornado Watch | SPC | Adams, Amite, Bolivar, Claiborne, Franklin, Issaquena and 5 more | 7 hr |
| Dec 27, 11:49 PM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Franklin, Issaquena, Jefferson and 4 more | 86 min |
| Dec 28, 2:03 AM CST | Mesoscale Discussion | SPC | Adams, Amite, Attala, Bolivar, Carroll, Claiborne and 49 more | 117 min |
| Dec 28, 2:23 AM CST | Tornado Watch | SPC | Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 60 more | 8 hr |
| Dec 28, 5:14 AM CST | Mesoscale Discussion | SPC | Attala, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 50 more | 2 hr |
Nearby
Tornado Watches in Alabama, 2015Tornado Watches in Florida, 2015Every tornado watch in 2015
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.