Alert archive / Louisiana / Tornado Watches in 2008
Tornado Watch 876
The Storm Prediction Center issued this tornado watch at Aug 31, 2008, 8:49 PM CDT for 4 states. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 31, 2008, 8:49 PM CDT (01:49 UTC)
- Expired
- Sep 1, 2008, 6:33 AM CDT
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 70 kt
All 43 counties
Baldwin County, AL, Mobile County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS
The radar
The Mobile radar (KMOB), 81 km from the middle of the area, began a volume at 01:52 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
- 5%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 10:29 PM CDT | Tornado Warning | LIX | Plaquemines | 46 min |
| Sep 1, 3:00 AM CDT | Tornado Warning | MOB | Baldwin, Mobile | 60 min |
| Sep 1, 3:09 AM CDT | Tornado Warning | LIX | Orleans, Plaquemines, Saint Bernard | 21 min |
| Sep 1, 3:31 AM CDT | Tornado Warning | MOB | Baldwin | 44 min |
| Sep 1, 3:49 AM CDT | Tornado Warning | LIX | Plaquemines | 26 min |
| Sep 1, 4:35 AM CDT | Tornado Warning | MOB | Baldwin | 55 min |
| Sep 1, 4:40 AM CDT | Tornado Warning | MOB | Escambia, Santa Rosa | 50 min |
| Sep 1, 5:12 AM CDT | Tornado Warning | LIX | Hancock, Harrison | 33 min |
| Sep 1, 5:25 AM CDT | Tornado Warning | MOB | Baldwin | 50 min |
| Sep 1, 5:31 AM CDT | Tornado Warning | MOB | Baldwin | 59 min |
| Sep 1, 5:41 AM CDT | Tornado Warning | LIX | Jefferson, Plaquemines, Saint Charles | 34 min |
| Sep 1, 5:46 AM CDT | Tornado Warning | MOB | Baldwin, Mobile | 59 min |
| Sep 1, 5:57 AM CDT | Tornado Warning | MOB | Escambia, Santa Rosa | 48 min |
| Sep 1, 6:21 AM CDT | Tornado Warning | MOB | Baldwin, Mobile, Washington | 39 min |
| Sep 1, 6:28 AM CDT | Tornado Warning | MOB | Baldwin, Mobile | 62 min |
| Sep 1, 6:31 AM CDT | Tornado Warning | MOB | Baldwin | 44 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, 1.8 hours before the alert went out and 74 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
- 838 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1135 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 7:47 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 88 min |
| Aug 31, 11:54 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 2 hr |
| Sep 1, 3:51 AM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 114 min |
| Sep 1, 6:30 AM CDT | Tornado Watch | SPC | Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more | 9 hr |
| Sep 1, 9:49 AM CDT | Mesoscale Discussion | SPC | Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more | 86 min |
| Sep 1, 3:51 PM CDT | Tornado Watch | SPC | Baldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more | 8 hr |
| Sep 1, 6:28 PM CDT | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more | 2 hr |
Nearby
Tornado Watches in Louisiana, 2008Tornado Watches in Florida, 2008Tornado Watches in Mississippi, 2008Every tornado watch in 2008
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.