Alert archive / Mississippi / Tornado Watches in 2013
Tornado Watch 126
The Storm Prediction Center issued this tornado watch at Apr 18, 2013, 1:43 PM CDT for Ashley County, Chicot County, Union County, Arkansas; 17 parishes in Louisiana; 34 counties in Mississippi. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2013, 1:43 PM CDT (18:43 UTC)
- Expired
- Apr 18, 2013, 10:02 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 54 counties
Ashley County, AR, Chicot County, AR, Union County, AR, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 115 km from the middle of the area, began a volume at 18:40 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
- 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
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 2:16 PM CDT | Severe Thunderstorm Warning | SHV | Union | 29 min |
| Apr 18, 2:20 PM CDT | Severe Thunderstorm Warning | JAN | Ashley, Chicot | 55 min |
| Apr 18, 2:25 PM CDT | Tornado Warning | SHV | Bienville, Jackson, Natchitoches, Red River, Winn | 35 min |
| Apr 18, 2:45 PM CDT | Severe Thunderstorm Warning | JAN | Ashley | 60 min |
| Apr 18, 2:56 PM CDT | Tornado Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 34 min |
| Apr 18, 3:07 PM CDT | Tornado Warning | JAN | Ashley | 38 min |
| Apr 18, 3:40 PM CDT | Tornado Warning | JAN | Ashley, Chicot | 65 min |
| Apr 18, 3:45 PM CDT | Severe Thunderstorm Warning | JAN | Ashley, Chicot | 60 min |
| Apr 18, 3:45 PM CDT | Tornado Warning | SHV | Caldwell, Ouachita | 45 min |
| Apr 18, 3:52 PM CDT | Tornado Warning | JAN | Ashley, Chicot | 38 min |
| Apr 18, 3:55 PM CDT | Tornado Warning | JAN | Franklin, Richland | 65 min |
| Apr 18, 4:24 PM CDT | Tornado Warning | JAN | Washington | 51 min |
| Apr 18, 4:31 PM CDT | Tornado Warning | JAN | Washington | 29 min |
| Apr 18, 4:41 PM CDT | Tornado Warning | JAN | Chicot | 19 min |
| Apr 18, 4:45 PM CDT | Tornado Warning | JAN | Chicot | 60 min |
| Apr 18, 4:59 PM CDT | Tornado Warning | JAN | East Carroll, Franklin, Madison | 61 min |
| Apr 18, 5:00 PM CDT | Severe Thunderstorm Warning | JAN | Bolivar, Humphreys, Issaquena, Leflore, Sharkey, Sunflower | 75 min |
| Apr 18, 5:23 PM CDT | Tornado Warning | JAN | Humphreys, Issaquena, Leflore, Sharkey, Sunflower, Washington | 52 min |
| Apr 18, 5:26 PM CDT | Tornado Warning | JAN | Sunflower | 34 min |
| Apr 18, 5:43 PM CDT | Severe Thunderstorm Warning | JAN | Issaquena, Sharkey, Warren | 47 min |
| Apr 18, 5:48 PM CDT | Tornado Warning | JAN | Leflore | 42 min |
| Apr 18, 6:03 PM CDT | Severe Thunderstorm Warning | JAN | Yazoo | 72 min |
| Apr 18, 6:06 PM CDT | Tornado Warning | JAN | Holmes, Leflore | 39 min |
| Apr 18, 6:08 PM CDT | Tornado Warning | JAN | Sharkey, Yazoo | 67 min |
| Apr 18, 6:20 PM CDT | Flash Flood Warning | JAN | Sunflower, Washington | 3 hr |
| Apr 18, 7:09 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Holmes | 66 min |
| Apr 18, 7:55 PM CDT | Flash Flood Warning | JAN | Attala, Holmes | 2 hr |
| Apr 18, 8:14 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Choctaw, Oktibbeha | 61 min |
| Apr 18, 8:20 PM CDT | Flash Flood Warning | JAN | Attala, Leake | 10 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, 6.7 hours before the alert went out and 105 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
- 73 J/kg
- Mixed-layer CIN
- -438 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 351 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 |
|---|---|---|---|---|
| Apr 17, 10:47 PM CDT | Tornado Watch | SPC | Benton, Carroll, Crawford, Madison, Washington | 7 hr |
| Apr 18, 2:01 AM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Madison and 2 more | 89 min |
| Apr 18, 4:02 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Conway, Crawford, Franklin and 17 more | 58 min |
| Apr 18, 7:26 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 20 more | 2 hr |
| Apr 18, 9:25 AM CDT | Tornado Watch | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 43 more | 8 hr |
| Apr 18, 12:48 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 29 more | 87 min |
| Apr 18, 4:56 PM CDT | Mesoscale Discussion | SPC | East Carroll, Franklin, Madison, Tensas, West Carroll | 94 min |
| Apr 18, 5:52 PM CDT | Tornado Watch | SPC | Calhoun, Chickasaw, Itawamba, Lafayette, Lee, Monroe and 6 more | 5 hr |
| Apr 18, 6:52 PM CDT | Mesoscale Discussion | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 12 more | 83 min |
Nearby
Tornado Watches in Mississippi, 2013Tornado Watches in Louisiana, 2013Tornado Watches in Arkansas, 2013Every tornado watch in 2013
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.