Alert archive / Oklahoma / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 79

April 10, 201633 counties in Oklahoma; Archer County, Clay County, Wichita County, Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 10, 2016, 5:13 PM CDT for 33 counties in Oklahoma; Archer County, Clay County, Wichita County, Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Apr 10, 2016, 5:13 PM CDT (22:13 UTC)
Expired: Apr 10, 2016, 10:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 36 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Clay County, TX, Wichita County, TX

The radar

The Norman radar (KTLX), 86 km from the middle of the area, began a volume at 22:14 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: 20%
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: 50%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Apr 10, 5:51 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	39 min
Apr 10, 6:24 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Kiowa, Tillman	66 min
Apr 10, 6:47 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	43 min
Apr 10, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	24 min
Apr 10, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	48 min
Apr 10, 7:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	43 min
Apr 10, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	47 min
Apr 10, 7:51 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	39 min
Apr 10, 7:54 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton	51 min
Apr 10, 7:55 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	50 min
Apr 10, 8:16 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	44 min
Apr 10, 8:31 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	44 min
Apr 10, 8:35 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	40 min
Apr 10, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	45 min
Apr 10, 8:45 PM CDT	Tornado Warning	OUN	Wichita	45 min
Apr 10, 9:02 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita, Wilbarger	43 min
Apr 10, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	51 min
Apr 10, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	44 min
Apr 10, 9:24 PM CDT	Tornado Warning	OUN	Cotton	24 min
Apr 10, 9:35 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa, Tillman	40 min
Apr 10, 9:44 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita, Wilbarger	46 min
Apr 10, 10:00 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	45 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 12:00Z, 10.2 hours before the alert went out and 77 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 596 m²/s²
0-3 km storm-relative helicity: 743 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 2:56 PM CDT	Mesoscale Discussion	SPC	Harmon	2 hr
Apr 10, 3:31 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Greer, Harmon, Jackson	6 hr
Apr 10, 4:57 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 24 more	2 hr
Apr 10, 5:13 PM CDT	Mesoscale Discussion	SPC	Craig, Mayes, Nowata, Osage, Ottawa, Rogers and 2 more	92 min
Apr 10, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	Craig, Nowata, Osage, Ottawa, Pawnee, Washington	6 hr
Apr 10, 6:57 PM CDT	Mesoscale Discussion	SPC	Greer, Harmon, Jackson	93 min
Apr 10, 5:08 PM CDT	Mesoscale Discussion	SPC	Dimmit, Edwards, Kinney, Maverick, Real, Terrell and 3 more	67 min
Apr 10, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more	5 hr

Nearby

Severe Thunderstorm Watches in Oklahoma, 2016 Severe Thunderstorm Watches in Texas, 2016 Every severe thunderstorm watch in 2016

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.