Alert archive / Mississippi / Tornado Watches in 2009
Tornado Watch 808
The Storm Prediction Center issued this tornado watch at Dec 24, 2009, 10:37 AM CST for 5 counties in Alabama; 8 parishes in Louisiana; 41 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 24, 2009, 10:37 AM CST (16:37 UTC)
- Expired
- Dec 24, 2009, 6:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 70 kt
All 54 counties
Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Attala County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Washington County, MS, Wayne County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 70 km from the middle of the area, began a volume at 16:39 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
- 60%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 60%
- 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
- 90%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 24, 11:19 AM CST | Tornado Warning | LIX | Ascension, Livingston, Tangipahoa | 26 min |
| Dec 24, 11:25 AM CST | Severe Thunderstorm Warning | LIX | Assumption, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne | 65 min |
| Dec 24, 12:37 PM CST | Severe Thunderstorm Warning | JAN | Lawrence, Lincoln | 53 min |
| Dec 24, 12:57 PM CST | Severe Thunderstorm Warning | JAN | Jefferson Davis, Lawrence, Marion | 48 min |
| Dec 24, 12:59 PM CST | Flash Flood Warning | JAN | Humphreys, Sunflower | 2 hr |
| Dec 24, 1:16 PM CST | Flash Flood Warning | JAN | Hinds, Madison, Rankin | 119 min |
| Dec 24, 2:46 PM CST | Severe Thunderstorm Warning | JAN | Forrest, Jones, Lamar | 59 min |
| Dec 24, 2:52 PM CST | Severe Thunderstorm Warning | MOB | Stone | 53 min |
| Dec 24, 3:24 PM CST | Severe Thunderstorm Warning | MOB | Greene, Perry, Wayne | 66 min |
| Dec 24, 3:35 PM CST | Severe Thunderstorm Warning | JAN | Clarke, Jasper | 55 min |
| Dec 24, 3:37 PM CST | Severe Thunderstorm Warning | MOB | George, Greene, Perry | 53 min |
| Dec 24, 3:39 PM CST | Tornado Warning | LIX | Jackson | 36 min |
| Dec 24, 3:45 PM CST | Tornado Warning | LIX | Jackson | 15 min |
| Dec 24, 3:46 PM CST | Tornado Warning | LIX | Jackson | 14 min |
| Dec 24, 4:02 PM CST | Severe Thunderstorm Warning | MOB | Mobile | 58 min |
| Dec 24, 4:25 PM CST | Severe Thunderstorm Warning | MOB | Baldwin, Mobile, Washington | 65 min |
| Dec 24, 4:55 PM CST | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 65 min |
| Dec 24, 5:16 PM CST | Severe Thunderstorm Warning | MOB | Baldwin, Clarke, Mobile, Monroe, Washington | 44 min |
| Dec 24, 5:26 PM CST | Severe Thunderstorm Warning | MOB | Clarke, Washington | 20 min |
| Dec 24, 5:36 PM CST | Tornado Warning | MOB | Baldwin | 37 min |
| Dec 24, 5:58 PM CST | Severe Thunderstorm Warning | MOB | Baldwin | 62 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
Jackson, MS (KJAN), launched 12:00Z, 4.6 hours before the alert went out and 77 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
- 498 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 335 m²/s²
- 0-3 km storm-relative helicity
- 614 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 24, 10:13 AM CST | Mesoscale Discussion | SPC | Baldwin, Mobile, Washington | 62 min |
| Dec 24, 1:14 PM CST | Mesoscale Discussion | SPC | Choctaw, Mobile, Washington | 61 min |
| Dec 24, 3:33 PM CST | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Escambia, Mobile, Monroe and 1 more | 57 min |
| Dec 24, 4:46 PM CST | Mesoscale Discussion | SPC | Baldwin, Clarke, Conecuh, Covington, Escambia, Geneva and 3 more | 59 min |
| Dec 24, 5:37 PM CST | Tornado Watch | SPC | Baldwin, Clarke, Coffee, Conecuh, Covington, Dale and 5 more | 9 hr |
| Dec 23, 7:50 PM CST | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Red River and 2 more | 85 min |
| Dec 23, 8:48 PM CST | Tornado Watch | SPC | Beauregard, Bienville, Bossier, Caddo, Calcasieu, Cameron and 7 more | 9 hr |
| Dec 23, 11:06 PM CST | Mesoscale Discussion | SPC | Beauregard, Bienville, Bossier, Caddo, Claiborne, De Soto and 5 more | 114 min |
| Dec 24, 3:30 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 42 more | 2 hr |
| Dec 24, 4:50 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 47 more | 7 hr |
| Dec 24, 7:30 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Caldwell and 39 more | 90 min |
| Dec 24, 9:34 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more | 56 min |
Nearby
Tornado Watches in Mississippi, 2009Tornado Watches in Louisiana, 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.