Alert archive / Oklahoma / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 80
The Storm Prediction Center issued this severe thunderstorm watch at Apr 19, 2015, 1:42 PM CDT for 28 counties in Arkansas; 38 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2015, 1:42 PM CDT (18:42 UTC)
- Expired
- Apr 19, 2015, 7:52 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 66 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Kay County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 45 km from the middle of the area, began a volume at 18:46 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
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 2:56 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 34 min |
| Apr 19, 3:13 PM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 47 min |
| Apr 19, 3:25 PM CDT | Severe Thunderstorm Warning | LZK | Logan, Scott | 65 min |
| Apr 19, 3:43 PM CDT | Severe Thunderstorm Warning | TSA | Franklin, Sebastian | 47 min |
| Apr 19, 4:07 PM CDT | Severe Thunderstorm Warning | LZK | Montgomery, Pike | 38 min |
| Apr 19, 4:12 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan, Pope, Yell | 63 min |
| Apr 19, 4:23 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee | 37 min |
| Apr 19, 4:26 PM CDT | Tornado Warning | LZK | Logan, Pope, Yell | 34 min |
| Apr 19, 4:28 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 47 min |
| Apr 19, 4:33 PM CDT | Severe Thunderstorm Warning | LZK | Logan, Scott, Yell | 42 min |
| Apr 19, 4:39 PM CDT | Severe Thunderstorm Warning | LZK | Newton | 51 min |
| Apr 19, 4:41 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 49 min |
| Apr 19, 4:43 PM CDT | Severe Thunderstorm Warning | LZK | Garland, Montgomery | 47 min |
| Apr 19, 4:44 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Muskogee, Sequoyah | 46 min |
| Apr 19, 4:46 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Perry, Pope, Yell | 44 min |
| Apr 19, 4:47 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, McIntosh, Muskogee | 43 min |
| Apr 19, 5:04 PM CDT | Severe Thunderstorm Warning | LZK | Garland, Grant, Hot Spring, Saline | 56 min |
| Apr 19, 5:04 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 41 min |
| Apr 19, 5:09 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 20 min |
| Apr 19, 5:12 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 48 min |
| Apr 19, 5:24 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Washington | 26 min |
| Apr 19, 5:28 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Faulkner, Pope, Van Buren, Yell | 62 min |
| Apr 19, 5:30 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Dallas, Grant, Hot Spring | 45 min |
| Apr 19, 5:32 PM CDT | Tornado Warning | LZK | Cleburne, Conway, Faulkner, Van Buren | 43 min |
| Apr 19, 5:52 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 34 min |
| Apr 19, 5:58 PM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Faulkner, Van Buren, White | 62 min |
| Apr 19, 6:08 PM CDT | Severe Thunderstorm Warning | LZK | Grant, Hot Spring, Pulaski, Saline | 52 min |
| Apr 19, 6:13 PM CDT | Severe Thunderstorm Warning | LZK | Dallas, Grant, Jefferson, Pulaski | 47 min |
| Apr 19, 6:16 PM CDT | Severe Thunderstorm Warning | TSA | Franklin | 29 min |
| Apr 19, 6:27 PM CDT | Severe Thunderstorm Warning | LZK | Johnson | 48 min |
| Apr 19, 6:44 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Faulkner, Perry | 46 min |
| Apr 19, 6:59 PM CDT | Severe Thunderstorm Warning | LZK | Lonoke, Prairie, Pulaski | 34 min |
| Apr 19, 7:03 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan, Pope | 42 min |
| Apr 19, 7:18 PM CDT | Severe Thunderstorm Warning | LZK | Faulkner, Garland, Pulaski, Saline | 57 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
Springfield, MO (KSGF), launched 12:00Z, 6.7 hours before the alert went out and 176 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
- 2 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 747 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -109 m²/s²
- 0-3 km storm-relative helicity
- -28 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 19, 12:43 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Clark, Crawford, Franklin, Garland and 19 more | 2 hr |
| Apr 19, 1:52 PM CDT | Mesoscale Discussion | SPC | Columbia, Lafayette, Little River, Miller | 53 min |
| Apr 19, 2:31 PM CDT | Severe Thunderstorm Watch | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 10 more | 7 hr |
| Apr 19, 4:45 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 28 more | 2 hr |
| Apr 19, 5:46 PM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 36 more | 6 hr |
| Apr 18, 7:46 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Comanche, Custer, Dewey, Ellis and 10 more | 89 min |
| Apr 18, 8:02 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Creek, Garvin, Hughes and 13 more | 88 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 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.