Alert archive / Arkansas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 8
The Storm Prediction Center issued this severe thunderstorm watch at Mar 25, 2015, 9:21 PM CDT for 39 counties in Arkansas; 25 counties in Oklahoma. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 25, 2015, 9:21 PM CDT (02:21 UTC)
- Expired
- Mar 26, 2015, 5:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 64 counties
Baxter County, AR, Boone County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Hempstead County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 40 km from the middle of the area, began a volume at 02:24 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 9:23 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Marion | 52 min |
| Mar 25, 9:29 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, McIntosh, Okfuskee, Pittsburg | 46 min |
| Mar 25, 9:30 PM CDT | Flash Flood Warning | TSA | Carroll, Madison | 4 hr |
| Mar 25, 9:31 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Muskogee, Sequoyah | 44 min |
| Mar 25, 9:40 PM CDT | Severe Thunderstorm Warning | LZK | Newton, Searcy | 50 min |
| Mar 25, 9:42 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Johnston, Murray, Pontotoc | 63 min |
| Mar 25, 9:53 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Sebastian | 52 min |
| Mar 25, 9:57 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 39 min |
| Mar 25, 10:24 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, Pittsburg | 66 min |
| Mar 25, 10:25 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Sebastian | 35 min |
| Mar 25, 10:31 PM CDT | Severe Thunderstorm Warning | LZK | Newton, Pope, Searcy, Van Buren | 44 min |
| Mar 25, 10:34 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal | 56 min |
| Mar 25, 10:41 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan, Yell | 64 min |
| Mar 25, 10:43 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Johnston | 62 min |
| Mar 25, 11:07 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg, Pushmataha | 38 min |
| Mar 25, 11:21 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston, Love, Marshall | 54 min |
| Mar 25, 11:44 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 46 min |
| Mar 26, 12:08 AM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan | 37 min |
| Mar 26, 12:19 AM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 41 min |
| Mar 26, 12:29 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Pushmataha | 46 min |
| Mar 26, 12:46 AM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 44 min |
| Mar 26, 1:03 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 27 min |
| Mar 26, 1:11 AM CDT | Severe Thunderstorm Warning | LZK | Polk, Scott | 64 min |
| Mar 26, 1:47 AM CDT | Severe Thunderstorm Warning | SHV | Howard, Little River, Sevier | 58 min |
| Mar 26, 2:45 AM CDT | Severe Thunderstorm Warning | SHV | Howard, Sevier | 30 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, 2.4 hours before the alert went out and 236 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
- 1928 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1591 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 294 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 16.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 7:02 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Randolph | 7 hr |
| Mar 25, 7:54 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 19 more | 66 min |
| Mar 25, 9:23 PM CDT | Mesoscale Discussion | SPC | Clay, Greene | 97 min |
| Mar 25, 11:39 PM CDT | Mesoscale Discussion | SPC | Cleburne, Conway, Faulkner, Franklin, Garland, Independence and 17 more | 96 min |
| Mar 26, 1:35 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene | 25 min |
| Mar 26, 2:17 AM CDT | Mesoscale Discussion | SPC | Clark, Garland, Grant, Hempstead, Hot Spring, Howard and 8 more | 58 min |
Nearby
Severe Thunderstorm Watches in Arkansas, 2015Severe Thunderstorm Watches in Oklahoma, 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.