Alert archive / Mississippi / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 24
The Storm Prediction Center issued this severe thunderstorm watch at Apr 3, 2015, 5:55 PM CDT for Ashley County, Chicot County, Arkansas; 5 parishes in Louisiana; 17 counties in Mississippi. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2015, 5:55 PM CDT (22:55 UTC)
- Expired
- Apr 3, 2015, 10:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 24 counties
Ashley County, AR, Chicot County, AR, East Carroll Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, West Carroll Parish, LA, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Madison County, MS, Montgomery County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 120 km from the middle of the area, began a volume at 22:56 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 6:07 PM CDT | Severe Thunderstorm Warning | JAN | Grenada, Leflore | 53 min |
| Apr 3, 7:04 PM CDT | Severe Thunderstorm Warning | JAN | East Carroll, West Carroll | 56 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
Little Rock, AR (KBYH), launched 12:00Z, 10.9 hours before the alert went out and 190 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
- 12 J/kg
- Mixed-layer CIN
- -578 J/kg
- Mixed-layer LCL
- 1008 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 516 m²/s²
- 0-3 km storm-relative helicity
- 503 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 2, 7:02 PM CDT | Tornado Watch | SPC | Baxter, Benton, Boone, Carroll, Fulton, Marion | 8 hr |
| Apr 2, 10:12 PM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Marion | 93 min |
| Apr 3, 1:16 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Craighead and 13 more | 59 min |
| Apr 3, 1:35 AM CDT | Tornado Watch | SPC | Baxter, Boone, Clay, Cleburne, Craighead, Fulton and 14 more | 6 hr |
| Apr 3, 1:52 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll | 4 hr |
| Apr 3, 5:43 AM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Craighead, Fulton, Greene and 13 more | 2 hr |
| Apr 3, 12:14 PM CDT | Tornado Watch | SPC | Mississippi | 8 hr |
| Apr 3, 3:57 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 6 more | 93 min |
| Apr 3, 5:54 PM CDT | Mesoscale Discussion | SPC | Union | 2 hr |
Nearby
Severe Thunderstorm Watches in Mississippi, 2015Severe Thunderstorm Watches in Louisiana, 2015Severe Thunderstorm Watches in Arkansas, 2015Every severe thunderstorm 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.