Alert archive / Mississippi / Tornado Watches in 2018
Tornado Watch 44
The Storm Prediction Center issued this tornado watch at Apr 13, 2018, 7:22 PM CDT for 7 counties in Arkansas; 9 parishes in Louisiana; 10 counties in Mississippi. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2018, 7:22 PM CDT (00:22 UTC)
- Expired
- Apr 13, 2018, 10:14 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 26 counties
Arkansas County, AR, Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, Monroe County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Bolivar County, MS, Claiborne County, MS, Franklin County, MS, Issaquena County, MS, Jefferson County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 139 km from the middle of the area, began a volume at 00:25 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
- 60%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:24 PM CDT | Tornado Warning | JAN | Morehouse | 34 min |
| Apr 13, 7:49 PM CDT | Tornado Warning | JAN | Ashley | 24 min |
| Apr 13, 8:12 PM CDT | Severe Thunderstorm Warning | JAN | Richland | 48 min |
| Apr 13, 8:28 PM CDT | Tornado Warning | JAN | Richland | 62 min |
| Apr 13, 8:35 PM CDT | Tornado Warning | JAN | Richland | 55 min |
| Apr 13, 9:04 PM CDT | Tornado Warning | JAN | Morehouse, Richland, West Carroll | 56 min |
| Apr 13, 9:59 PM CDT | Severe Thunderstorm Warning | JAN | Ashley, Chicot | 46 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, 0.4 hours before the alert went out and 129 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
- 92 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1418 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
154 WWUS20 KWNS 140018 SEL4 SPC WW 140018 ARZ000-LAZ000-MSZ000-140800- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 44 NWS Storm Prediction Center Norman OK 720 PM CDT Fri Apr 13 2018 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southeast Arkansas Northeast Louisiana Western Mississippi * Effective this Friday night and Saturday morning from 720 PM until 300 AM CDT. * Primary threats include... A few tornadoes likely with a couple intense tornadoes possible Widespread damaging wind gusts to 70 mph likely Isolated very large hail events to 2 inches in diameter possible SUMMARY...Scattered supercells with a history of producing tornadoes will continue to move across northeast Louisiana into far southeast Arkansas and eventually far western Mississippi this evening. More numerous storm coverage is expected late this evening into the overnight with a risk for tornadoes and wind damage continuing. The tornado watch area is approximately along and 30 statute miles east and west of a line from 40 miles northeast of Monticello AR to 15 miles south southwest of Natchez MS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...WW 41...WW 42...WW 43... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 20035. ...Guyer
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:06 PM CDT | Mesoscale Discussion | SPC | Howard, Montgomery, Yell | 24 min |
| Apr 13, 8:36 PM CDT | Mesoscale Discussion | SPC | Garland, Howard, Pike | 54 min |
| Apr 13, 8:54 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 47 more | 66 min |
| Apr 13, 9:53 PM CDT | Tornado Watch | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 37 more | 8 hr |
| Apr 13, 10:12 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more | 10 hr |
| Apr 14, 2:10 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Desha, Drew and 3 more | 2 hr |
| Apr 14, 6:37 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 20 more | 83 min |
| Apr 14, 6:57 AM CDT | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 22 more | 7 hr |
| Apr 14, 4:35 AM CDT | Mesoscale Discussion | SPC | Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 32 more | 115 min |
| Apr 14, 9:40 AM CDT | Mesoscale Discussion | SPC | George, Greene, Jackson | 95 min |
| Apr 14, 10:36 AM CDT | Tornado Watch | SPC | George, Greene, Harrison, Jackson, Perry, Stone and 1 more | 8 hr |
| Apr 14, 12:41 PM CDT | Mesoscale Discussion | SPC | George, Greene, Jackson | 94 min |
| Apr 14, 2:56 PM CDT | Mesoscale Discussion | SPC | Jackson | 94 min |
| Apr 14, 6:17 PM CDT | Mesoscale Discussion | SPC | George, Jackson | 118 min |
| Apr 14, 6:55 PM CDT | Tornado Watch | SPC | George, Greene | 6 hr |
Nearby
Tornado Watches in Mississippi, 2018Tornado Watches in Louisiana, 2018Tornado Watches in Arkansas, 2018Every tornado watch in 2018
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.