Alert archive / Mississippi / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 140
The Storm Prediction Center issued this severe thunderstorm watch at Apr 14, 2007, 7:11 AM CDT for 10 parishes in Louisiana; 40 counties in Mississippi. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2007, 7:11 AM CDT (12:11 UTC)
- Expired
- Apr 14, 2007, 1:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 50 counties
East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Holmes 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, Lowndes County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 21 km from the middle of the area, began a volume at 12:13 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:16 AM CDT | Tornado Warning | JAN | Attala, Holmes, Madison, Yazoo | 44 min |
| Apr 14, 7:38 AM CDT | Tornado Warning | JAN | Leake | 52 min |
| Apr 14, 7:45 AM CDT | Severe Thunderstorm Warning | JAN | Hinds | 30 min |
| Apr 14, 7:57 AM CDT | Severe Thunderstorm Warning | JAN | Attala | 25 min |
| Apr 14, 7:59 AM CDT | Severe Thunderstorm Warning | JAN | Madison, Rankin | 23 min |
| Apr 14, 8:03 AM CDT | Severe Thunderstorm Warning | JAN | Choctaw, Winston | 28 min |
| Apr 14, 8:21 AM CDT | Severe Thunderstorm Warning | JAN | Oktibbeha | 39 min |
| Apr 14, 8:52 AM CDT | Severe Thunderstorm Warning | JAN | Leake | 13 min |
| Apr 14, 8:57 AM CDT | Severe Thunderstorm Warning | JAN | Clay | 17 min |
| Apr 14, 9:28 AM CDT | Severe Thunderstorm Warning | JAN | Hinds, Rankin | 47 min |
| Apr 14, 9:36 AM CDT | Severe Thunderstorm Warning | JAN | Marion | 39 min |
| Apr 14, 9:47 AM CDT | Tornado Warning | JAN | Marion | 33 min |
| Apr 14, 9:48 AM CDT | Tornado Warning | LIX | Washington | 12 min |
| Apr 14, 9:58 AM CDT | Severe Thunderstorm Warning | JAN | Covington | 28 min |
| Apr 14, 10:00 AM CDT | Tornado Warning | JAN | Covington | 24 min |
| Apr 14, 10:04 AM CDT | Tornado Warning | JAN | Lamar | 42 min |
| Apr 14, 10:07 AM CDT | Tornado Warning | JAN | Jones | 38 min |
| Apr 14, 10:10 AM CDT | Severe Thunderstorm Warning | JAN | Leake | 35 min |
| Apr 14, 10:28 AM CDT | Tornado Warning | JAN | Forrest | 42 min |
| Apr 14, 10:36 AM CDT | Tornado Warning | JAN | Jones | 39 min |
| Apr 14, 10:49 AM CDT | Severe Thunderstorm Warning | JAN | Clarke, Jasper | 56 min |
| Apr 14, 10:59 AM CDT | Tornado Warning | JAN | Clarke, Jasper | 46 min |
| Apr 14, 11:05 AM CDT | Tornado Warning | JAN | Jones | 25 min |
| Apr 14, 11:10 AM CDT | Severe Thunderstorm Warning | JAN | Lowndes | 20 min |
| Apr 14, 11:24 AM CDT | Tornado Warning | JAN | Forrest, Lamar | 25 min |
| Apr 14, 11:27 AM CDT | Flash Flood Warning | JAN | Forrest, Lamar | 2 hr |
| Apr 14, 11:49 AM CDT | Severe Thunderstorm Warning | JAN | Winston | 17 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, 0.2 hours before the alert went out and 29 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
- 912 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 10:07 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 7 more | 53 min |
| Apr 14, 10:26 AM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 32 more | 7 hr |
| Apr 14, 12:24 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, Cullman, DeKalb and 10 more | 66 min |
| Apr 14, 2:12 PM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 32 more | 63 min |
| Apr 14, 3:35 PM CDT | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston | 7 hr |
| Apr 14, 5:04 PM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Bullock, Butler, Chambers and 26 more | 56 min |
| Apr 14, 5:26 PM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 19 more | 6 hr |
| Apr 13, 8:42 PM CDT | Mesoscale Discussion | SPC | Allen, Avoyelles, Beauregard, Bienville, Bossier, Caddo and 22 more | 2 hr |
| Apr 14, 1:34 AM CDT | Mesoscale Discussion | SPC | Allen, Avoyelles, Caldwell, Catahoula, Concordia, East Carroll and 14 more | 56 min |
| Apr 14, 1:41 AM CDT | Tornado Watch | SPC | Allen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 19 more | 6 hr |
| Apr 14, 6:17 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Lafayette and 13 more | 88 min |
| Apr 13, 10:55 PM CDT | Mesoscale Discussion | SPC | Bolivar, Coahoma, Humphreys, Leflore, Quitman, Sunflower and 2 more | 95 min |
Nearby
Severe Thunderstorm Watches in Mississippi, 2007Severe Thunderstorm Watches in Louisiana, 2007Every severe thunderstorm watch in 2007
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.