Alert archive / Mississippi / Tornado Watches in 2015
Tornado Watch 551
The Storm Prediction Center issued this tornado watch at Nov 18, 2015, 2:49 AM CST for 10 counties in Alabama; 5 parishes in Louisiana; 16 counties in Mississippi. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 18, 2015, 2:49 AM CST (08:49 UTC)
- Expired
- Nov 18, 2015, 9:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 31 counties
Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Mobile County, AL, Pickens County, AL, Sumter County, AL, Washington County, AL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Lowndes County, MS, Noxubee County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 112 km from the middle of the area, began a volume at 08:51 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
- 10%
- 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
- 60%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 18, 3:26 AM CST | Severe Thunderstorm Warning | JAN | Lowndes, Noxubee | 64 min |
| Nov 18, 3:37 AM CST | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 38 min |
| Nov 18, 3:38 AM CST | Tornado Warning | MOB | Baldwin, Escambia | 13 min |
| Nov 18, 3:41 AM CST | Severe Thunderstorm Warning | JAN | Lowndes | 47 min |
| Nov 18, 3:55 AM CST | Tornado Warning | JAN | Lowndes | 24 min |
| Nov 18, 4:13 AM CST | Severe Thunderstorm Warning | JAN | Kemper, Noxubee | 29 min |
| Nov 18, 4:27 AM CST | Severe Thunderstorm Warning | BMX | Pickens, Sumter | 48 min |
| Nov 18, 6:22 AM CST | Tornado Warning | MOB | Wayne | 23 min |
| Nov 18, 8:23 AM CST | Severe Thunderstorm Warning | MOB | Mobile | 52 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 00:00Z, 8.8 hours before the alert went out and 157 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
- 107 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 916 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 309 m²/s²
- 0-3 km storm-relative helicity
- 502 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 18, 1:14 AM CST | Mesoscale Discussion | SPC | Choctaw, Clarke, Fayette, Greene, Hale, Lamar and 8 more | 2 hr |
| Nov 18, 5:21 AM CST | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Dallas, Fayette, Greene and 9 more | 114 min |
| Nov 18, 7:22 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Butler, Chilton, Clarke and 14 more | 83 min |
| Nov 18, 8:25 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Clarke and 22 more | 8 hr |
| Nov 18, 10:51 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Coffee and 17 more | 114 min |
| Nov 18, 1:39 PM CST | Mesoscale Discussion | SPC | Barbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more | 2 hr |
| Nov 18, 2:16 PM CST | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston | 6 hr |
| Nov 17, 6:53 PM CST | Mesoscale Discussion | SPC | Concordia | 97 min |
| Nov 17, 7:45 PM CST | Tornado Watch | SPC | Ascension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberia and 25 more | 7 hr |
| Nov 17, 11:11 PM CST | Mesoscale Discussion | SPC | Livingston, Saint John the Baptist, Saint Tammany, Tangipahoa, Washington | 94 min |
Nearby
Tornado Watches in Mississippi, 2015Tornado Watches in Alabama, 2015Tornado Watches in Louisiana, 2015Every tornado watch in 2015
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.