Alert archive / Mississippi / Tornado Watches in 2006
Tornado Watch 891
The Storm Prediction Center issued this tornado watch at Dec 30, 2006, 8:43 AM CST for Baldwin County, Mobile County, Alabama; 11 parishes in Louisiana; 13 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 30, 2006, 8:43 AM CST (14:43 UTC)
- Expired
- Dec 30, 2006, 1:32 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 26 counties
Baldwin County, AL, Mobile County, AL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS
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
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 30, 11:28 AM CST | Tornado Warning | LIX | Saint Helena, Tangipahoa | 32 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 12:00Z, 2.7 hours before the alert went out and 38 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
- 674 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 413 m²/s²
- 0-3 km storm-relative helicity
- 525 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 30, 5:45 PM CST | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 60 min |
| Dec 29, 7:52 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 18 more | 53 min |
| Dec 29, 8:19 PM CST | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 23 more | 10 hr |
| Dec 29, 11:41 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 24 more | 94 min |
| Dec 30, 3:14 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Assumption, Avoyelles, Beauregard, Bienville and 30 more | 91 min |
| Dec 30, 5:43 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Cameron and 19 more | 6 hr |
| Dec 30, 7:49 AM CST | Mesoscale Discussion | SPC | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint John the Baptist and 3 more | 86 min |
| Dec 30, 10:22 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 9 more | 83 min |
| Dec 30, 1:13 PM CST | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Saint Bernard, Saint Charles, Saint Tammany | 62 min |
| Dec 30, 1:30 PM CST | Tornado Watch | SPC | Jefferson, Lafourche, Livingston, Orleans, Plaquemines, Saint Bernard and 6 more | 7 hr |
Nearby
Tornado Watches in Mississippi, 2006Tornado Watches in Louisiana, 2006Tornado Watches in Alabama, 2006Every tornado watch in 2006
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.