Alert archive / Alabama / Tornado Watches in 2009
Tornado Watch 148
The Storm Prediction Center issued this tornado watch at Apr 13, 2009, 2:33 AM CDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2009, 2:33 AM CDT (07:33 UTC)
- Expired
- Apr 13, 2009, 9:18 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 51 counties
Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Macon County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Russell County, AL, Washington County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Dougherty County, GA, Early County, GA, Lee County, GA, Marion County, GA, Miller County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Stewart County, GA, Terrell County, GA, Webster County, GA, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Stone County, MS
The radar
The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 07:35 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
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 2:35 AM CDT | Severe Thunderstorm Warning | MOB | Mobile | 40 min |
| Apr 13, 2:52 AM CDT | Severe Thunderstorm Warning | MOB | Clarke, Washington | 53 min |
| Apr 13, 3:00 AM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Monroe | 45 min |
| Apr 13, 3:14 AM CDT | Severe Thunderstorm Warning | LIX | Harrison | 23 min |
| Apr 13, 3:50 AM CDT | Flash Flood Warning | MOB | Baldwin, Clarke, Mobile, Monroe, Washington | 3 hr |
| Apr 13, 4:16 AM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 29 min |
| Apr 13, 4:30 AM CDT | Severe Thunderstorm Warning | BMX | Barbour, Bullock, Russell | 45 min |
| Apr 13, 4:36 AM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 39 min |
| Apr 13, 4:44 AM CDT | Tornado Warning | MOB | Escambia | 21 min |
| Apr 13, 4:53 AM CDT | Tornado Warning | BMX | Barbour, Russell | 27 min |
| Apr 13, 5:10 AM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Escambia | 36 min |
| Apr 13, 5:23 AM CDT | Severe Thunderstorm Warning | FFC | Chattahoochee, Stewart | 39 min |
| Apr 13, 5:42 AM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Covington, Escambia | 33 min |
| Apr 13, 6:27 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 33 min |
| Apr 13, 6:56 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 24 min |
| Apr 13, 7:09 AM CDT | Severe Thunderstorm Warning | TAE | Geneva | 36 min |
| Apr 13, 7:12 AM CDT | Flash Flood Warning | MOB | Baldwin, Conecuh, Covington, Escambia, Mobile | 3 hr |
| Apr 13, 7:33 AM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 42 min |
| Apr 13, 7:43 AM CDT | Severe Thunderstorm Warning | TAE | Dale, Geneva, Houston | 47 min |
| Apr 13, 8:14 AM CDT | Severe Thunderstorm Warning | TAE | Henry | 46 min |
| Apr 13, 8:14 AM CDT | Tornado Warning | TAE | Houston | 31 min |
| Apr 13, 8:23 AM CDT | Severe Thunderstorm Warning | TAE | Henry, Houston | 37 min |
| Apr 13, 8:35 AM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 40 min |
| Apr 13, 9:10 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 50 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 7.6 hours before the alert went out and 220 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
- 1395 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 497 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 485 m²/s²
- 0-3 km storm-relative helicity
- 608 m²/s²
- Significant tornado parameter
- 5.0
- Supercell composite
- 19.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 8:07 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Butler, Chilton, Choctaw, Clarke and 12 more | 53 min |
| Apr 12, 8:30 PM CDT | Tornado Watch | SPC | Choctaw, Clarke, Greene, Hale, Marengo, Mobile and 2 more | 6 hr |
| Apr 12, 10:42 PM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 33 more | 93 min |
| Apr 12, 11:01 PM CDT | Tornado Watch | SPC | Autauga, Baldwin, Butler, Conecuh, Covington, Crenshaw and 8 more | 4 hr |
| Apr 13, 1:57 AM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 13 more | 63 min |
| Apr 13, 4:32 AM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 10 more | 58 min |
| Apr 13, 7:27 AM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Escambia, Geneva and 3 more | 2 hr |
| Apr 13, 9:12 AM CDT | Tornado Watch | SPC | Coffee, Covington, Dale, Escambia, Geneva, Henry and 1 more | 9 hr |
| Apr 13, 11:15 AM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Clarke, Coffee and 11 more | 90 min |
| Apr 13, 12:09 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Marion and 2 more | 66 min |
| Apr 13, 12:58 PM CDT | Tornado Watch | SPC | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 7 hr |
| Apr 13, 4:16 PM CDT | Severe Thunderstorm Watch | SPC | Choctaw | 4 hr |
| Apr 13, 5:52 PM CDT | Mesoscale Discussion | SPC | Blount, Cullman, DeKalb, Etowah, Fayette, Jackson and 10 more | 53 min |
| Apr 13, 6:55 PM CDT | Mesoscale Discussion | SPC | Bibb, Chilton, Choctaw, Clarke, Dallas, Greene and 9 more | 95 min |
| Apr 13, 11:32 AM CDT | Tornado Watch | SPC | Baker, Bradford, Clay, Columbia, Duval, Gilchrist and 5 more | 6 hr |
| Apr 13, 5:22 PM CDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 18 more | 83 min |
| Apr 13, 5:53 PM CDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 22 more | 5 hr |
| Apr 13, 1:39 PM CDT | Mesoscale Discussion | SPC | Adams, Amite, Copiah, Covington, Forrest, Franklin and 14 more | 66 min |
Nearby
Tornado Watches in Alabama, 2009Tornado Watches in Georgia, 2009Tornado Watches in Florida, 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.