Alert archive / Arkansas / Tornado Watches in 2015
Tornado Watch 218
The Storm Prediction Center issued this tornado watch at May 25, 2015, 10:03 PM CDT for 8 counties in Arkansas; 8 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 25, 2015, 10:03 PM CDT (03:03 UTC)
- Expired
- May 26, 2015, 1:33 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
Counties Clay County, AR, Craighead County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Butler County, MO, Carter County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Reynolds County, MO, Ripley County, MO, Wayne County, MO
The radar
The Memphis radar (KNQA), 180 km from the middle of the area, began a volume at 03:05 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
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
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 00:00Z, 3.1 hours before the alert went out and 226 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
- 1539 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 7.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 8:52 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Boone, Carroll, Clay, Cleburne and 35 more | 83 min |
| May 25, 11:48 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Lawrence, Poinsett, Randolph | 87 min |
| May 25, 7:47 PM CDT | Tornado Watch | SPC | Barry, Barton, Cedar, Christian, Dade, Dallas and 20 more | 5 hr |
| May 25, 8:18 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Daviess, DeKalb, Gentry and 5 more | 87 min |
Nearby
Tornado Watches in Arkansas, 2015Tornado Watches in Missouri, 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.