Alert archive / Oklahoma / Tornado Watches in 2010

Tornado Watch 147

May 10, 201011 counties in Kansas; 44 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at May 10, 2010, 1:25 PM CDT for 11 counties in Kansas; 44 counties in Oklahoma. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2010, 1:25 PM CDT (18:25 UTC)
Expired: May 10, 2010, 10:00 PM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Particularly dangerous situation: Yes
Largest hail expected: 4 in
Strongest gust expected: 70 kt

All 55 counties

Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Harper County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Washington County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Norman radar (KTLX), 84 km from the middle of the area, began a volume at 18:28 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: 95%
One or more EF2 to EF5 tornadoes: 80%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 70%
Ten or more severe hail reports: 95%
One or more hailstones of 2 inches or more: 90%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 10, 2:11 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods, Woodward	64 min
May 10, 2:22 PM CDT	Tornado Warning	OUN	Alfalfa, Major, Woods, Woodward	53 min
May 10, 3:13 PM CDT	Tornado Warning	OUN	Alfalfa, Grant	47 min
May 10, 3:20 PM CDT	Severe Thunderstorm Warning	ICT	Harper, Kingman	40 min
May 10, 3:39 PM CDT	Severe Thunderstorm Warning	ICT	Harper, Sumner	66 min
May 10, 3:41 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Grant, Kingfisher, Major, Noble	64 min
May 10, 3:48 PM CDT	Severe Thunderstorm Warning	ICT	Reno	19 min
May 10, 3:52 PM CDT	Tornado Warning	OUN	Grant, Kay	38 min
May 10, 4:09 PM CDT	Severe Thunderstorm Warning	ICT	Kingman	66 min
May 10, 4:12 PM CDT	Tornado Warning	ICT	Cowley, Sumner	33 min
May 10, 4:13 PM CDT	Tornado Warning	ICT	Kingman	32 min
May 10, 4:16 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Cleveland, Grady, Kingfisher, Logan and 2 more	59 min
May 10, 4:16 PM CDT	Tornado Warning	OUN	Garfield, Kay, Noble	44 min
May 10, 4:25 PM CDT	Tornado Warning	OUN	Kay	35 min
May 10, 4:33 PM CDT	Tornado Warning	TSA	Osage, Pawnee	57 min
May 10, 4:34 PM CDT	Tornado Warning	ICT	Kingman, Sedgwick	26 min
May 10, 4:41 PM CDT	Tornado Warning	ICT	Cowley	48 min
May 10, 4:47 PM CDT	Tornado Warning	OUN	Canadian, Cleveland, Grady, Oklahoma	58 min
May 10, 4:50 PM CDT	Tornado Warning	ICT	Sedgwick	40 min
May 10, 4:51 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	54 min
May 10, 4:57 PM CDT	Severe Thunderstorm Warning	ICT	Kingman, Reno	20 min
May 10, 4:57 PM CDT	Tornado Warning	OUN	Noble	33 min
May 10, 5:05 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, Lincoln, McClain, Oklahoma, Pottawatomie	55 min
May 10, 5:07 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	38 min
May 10, 5:14 PM CDT	Severe Thunderstorm Warning	ICT	Butler	31 min
May 10, 5:15 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	45 min
May 10, 5:18 PM CDT	Tornado Warning	ICT	Chautauqua, Cowley, Elk	23 min
May 10, 5:18 PM CDT	Tornado Warning	TSA	Osage, Pawnee	42 min
May 10, 5:19 PM CDT	Tornado Warning	OUN	Lincoln, Logan	37 min
May 10, 5:25 PM CDT	Tornado Warning	OUN	Garvin, Grady, Stephens	20 min
May 10, 5:26 PM CDT	Tornado Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	49 min
May 10, 5:29 PM CDT	Severe Thunderstorm Warning	ICT	Sedgwick	61 min
May 10, 5:40 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	35 min
May 10, 5:43 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	31 min
May 10, 5:49 PM CDT	Tornado Warning	OUN	Carter, Jefferson, Stephens	26 min
May 10, 5:54 PM CDT	Severe Thunderstorm Warning	ICT	Butler	37 min
May 10, 5:56 PM CDT	Tornado Warning	OUN	Carter, Jefferson, Love	49 min
May 10, 5:57 PM CDT	Severe Thunderstorm Warning	ICT	Cowley, Sumner	40 min
May 10, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pontotoc, Pottawatomie, Seminole	46 min
May 10, 6:02 PM CDT	Severe Thunderstorm Warning	OUN	Kay	31 min
May 10, 6:02 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	58 min
May 10, 6:04 PM CDT	Tornado Warning	OUN	Carter, Johnston, Murray	41 min
May 10, 6:04 PM CDT	Tornado Warning	OUN	Kay	27 min
May 10, 6:08 PM CDT	Tornado Warning	OUN	Hughes, Lincoln, Pottawatomie, Seminole	67 min
May 10, 6:08 PM CDT	Tornado Warning	OUN	Kay	24 min
May 10, 6:10 PM CDT	Severe Thunderstorm Warning	ICT	Harvey, McPherson, Reno, Rice	49 min
May 10, 6:11 PM CDT	Severe Thunderstorm Warning	ICT	Butler, Cowley	23 min
May 10, 6:11 PM CDT	Tornado Warning	OUN	Noble	15 min
May 10, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain, Pottawatomie	48 min
May 10, 6:16 PM CDT	Tornado Warning	TSA	Osage	44 min
May 10, 6:17 PM CDT	Severe Thunderstorm Warning	ICT	Cowley	28 min
May 10, 6:18 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	42 min
May 10, 6:20 PM CDT	Tornado Warning	TSA	Okfuskee	40 min
May 10, 6:23 PM CDT	Severe Thunderstorm Warning	ICT	Elk, Greenwood	52 min
May 10, 6:34 PM CDT	Tornado Warning	ICT	Chautauqua	56 min
May 10, 6:35 PM CDT	Tornado Warning	OUN	Carter, Johnston, Marshall, Murray	40 min
May 10, 6:36 PM CDT	Severe Thunderstorm Warning	ICT	Chautauqua	40 min
May 10, 6:37 PM CDT	Tornado Warning	OUN	Cleveland, McClain, Pontotoc, Pottawatomie, Seminole	53 min
May 10, 6:38 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	67 min
May 10, 6:39 PM CDT	Tornado Warning	OUN	Carter, Love, Marshall	51 min
May 10, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	50 min
May 10, 6:51 PM CDT	Tornado Warning	OUN	Lincoln, Pottawatomie, Seminole	39 min
May 10, 6:53 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Osage, Rogers, Tulsa, Wagoner	37 min
May 10, 6:53 PM CDT	Tornado Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee, Pittsburg	52 min
May 10, 7:02 PM CDT	Tornado Warning	TSA	Creek, Okfuskee, Okmulgee	28 min
May 10, 7:13 PM CDT	Tornado Warning	OUN	Garvin, McClain, Murray, Pontotoc	62 min
May 10, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, McClain, Pontotoc, Pottawatomie, Seminole	50 min
May 10, 7:26 PM CDT	Tornado Warning	OUN	Carter, Garvin, Johnston, Murray, Pontotoc	49 min
May 10, 7:28 PM CDT	Tornado Warning	TSA	Creek, Okfuskee, Okmulgee	47 min
May 10, 7:36 PM CDT	Tornado Warning	TSA	McIntosh, Muskogee, Okmulgee	39 min
May 10, 7:45 PM CDT	Tornado Warning	OUN	Hughes, Pontotoc, Seminole	45 min
May 10, 8:04 PM CDT	Tornado Warning	OUN	Atoka, Bryan, Carter, Coal, Johnston, Marshall and 1 more	56 min
May 10, 8:05 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Johnston, Love, Marshall	55 min
May 10, 8:17 PM CDT	Tornado Warning	OUN	Carter, Johnston, Love, Marshall	43 min
May 10, 9:00 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Love, Marshall	60 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, 6.4 hours before the alert went out and 81 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: 53 J/kg
Mixed-layer CIN: -331 J/kg
Mixed-layer LCL: 442 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 640 m²/s²
0-3 km storm-relative helicity: 652 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 2:32 AM CDT	Mesoscale Discussion	SPC	Norton, Phillips	88 min
May 10, 10:37 AM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Finney, Ford, Gove and 19 more	113 min
May 10, 12:36 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Edwards, Ellis, Finney and 22 more	6 hr
May 10, 12:46 PM CDT	Mesoscale Discussion	SPC	Barber, Harper, Sumner	119 min
May 10, 2:53 PM CDT	Mesoscale Discussion	SPC	Barber, Chautauqua, Cowley, Harper, Kingman, Pratt and 4 more	97 min
May 10, 3:14 PM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Barton, Brown, Chase, Clay and 35 more	2 hr
May 10, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Barton, Chase, Clay, Cloud, Coffey and 27 more	6 hr
May 10, 4:42 PM CDT	Mesoscale Discussion	SPC	Allen, Butler, Chase, Chautauqua, Cherokee, Coffey and 19 more	63 min
May 10, 5:00 PM CDT	Tornado Watch PDS	SPC	Allen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 3 more	6 hr
May 10, 6:45 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Crawford, Labette, Montgomery	60 min
May 10, 3:40 PM CDT	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Comanche, Cotton, Garfield and 7 more	2 hr
May 10, 3:28 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Denton, Haskell and 11 more	62 min
May 10, 4:27 PM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 23 more	7 hr

Nearby

Tornado Watches in Oklahoma, 2010 Tornado Watches in Kansas, 2010 Every tornado watch in 2010

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.