Alert archive / Arkansas / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 88
The Storm Prediction Center issued this severe thunderstorm watch at Mar 26, 2017, 8:49 PM CDT for 10 counties in Arkansas; 7 counties in Oklahoma; 7 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 26, 2017, 8:49 PM CDT (01:49 UTC)
- Expired
- Mar 27, 2017, 2:34 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 24 counties
Crawford County, AR, Franklin County, AR, Howard County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Sequoyah County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Western Arkansas radar (KSRX), 93 km from the middle of the area, began a volume at 01:49 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 10:20 PM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 25 min |
| Mar 26, 10:44 PM CDT | Severe Thunderstorm Warning | TSA | Franklin, Sebastian | 46 min |
| Mar 26, 11:31 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 59 min |
| Mar 26, 11:37 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan | 38 min |
| Mar 27, 12:17 AM CDT | Tornado Warning | SHV | McCurtain | 28 min |
| Mar 27, 12:19 AM CDT | Tornado Warning | SHV | Howard, Sevier | 41 min |
| Mar 27, 12:24 AM CDT | Severe Thunderstorm Warning | LZK | Polk | 51 min |
| Mar 27, 12:37 AM CDT | Severe Thunderstorm Warning | SHV | Howard, Little River, Sevier | 53 min |
| Mar 27, 12:48 AM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 23 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
Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 234 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
- 1387 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1196 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 188 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 5.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 12:44 AM CDT | Mesoscale Discussion | SPC | Garland, Hempstead, Howard, Lafayette, Little River, Logan and 8 more | 61 min |
| Mar 27, 11:26 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Mississippi, Poinsett | 3 hr |
| Mar 27, 12:08 PM CDT | Severe Thunderstorm Watch | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 8 hr |
| Mar 27, 1:54 PM CDT | Severe Thunderstorm Watch | SPC | Chicot | 7 hr |
| Mar 27, 3:33 PM CDT | Mesoscale Discussion | SPC | Chicot | 87 min |
| Mar 27, 3:39 PM CDT | Mesoscale Discussion | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 2 hr |
| Mar 26, 7:15 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 9 more | 90 min |
| Mar 26, 10:05 PM CDT | Mesoscale Discussion | SPC | Nowata, Washington | 85 min |
| Mar 26, 11:40 PM CDT | Mesoscale Discussion | SPC | Milam, Robertson, Williamson | 95 min |
Nearby
Severe Thunderstorm Watches in Arkansas, 2017Severe Thunderstorm Watches in Oklahoma, 2017Severe Thunderstorm Watches in Texas, 2017Every severe thunderstorm watch in 2017
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.