Alert archive / Oklahoma / Tornado Watches in 2010

Tornado Watch 155

May 12, 201026 counties in Kansas; 27 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this tornado watch at May 12, 2010, 2:41 PM CDT for 26 counties in Kansas; 27 counties in Oklahoma; 7 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2010, 2:41 PM CDT (19:41 UTC)
Expired
May 12, 2010, 10:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 60 counties

Anderson County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Cowley County, KS, Dickinson County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Harper County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Kingman County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Morris County, KS, Osage County, KS, Pottawatomie County, KS, Reno County, KS, Riley County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Wichita radar (KICT), 18 km from the middle of the area, began a volume at 19:44 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
50%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
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
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 12, 2:54 PM CDTSevere Thunderstorm WarningICTKingman, Reno66 min
May 12, 3:00 PM CDTSevere Thunderstorm WarningOUNWoods60 min
May 12, 3:21 PM CDTSevere Thunderstorm WarningICTMcPherson, Rice54 min
May 12, 3:23 PM CDTTornado WarningICTHarvey, McPherson, Reno37 min
May 12, 3:23 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Hardeman, Knox, Wilbarger52 min
May 12, 3:24 PM CDTTornado WarningICTKingman, Reno36 min
May 12, 3:42 PM CDTTornado WarningICTMcPherson33 min
May 12, 3:48 PM CDTTornado WarningICTReno27 min
May 12, 3:52 PM CDTSevere Thunderstorm WarningOUNWoods, Woodward53 min
May 12, 3:59 PM CDTSevere Thunderstorm WarningICTKingman16 min
May 12, 4:06 PM CDTTornado WarningICTHarper24 min
May 12, 4:08 PM CDTSevere Thunderstorm WarningOUNWoodward52 min
May 12, 4:13 PM CDTTornado WarningICTMcPherson, Marion, Saline32 min
May 12, 4:15 PM CDTSevere Thunderstorm WarningICTHarvey, Reno, Sedgwick45 min
May 12, 4:19 PM CDTSevere Thunderstorm WarningOUNJackson, Kiowa, Tillman41 min
May 12, 4:21 PM CDTTornado WarningTOPDickinson, Morris46 min
May 12, 4:24 PM CDTTornado WarningICTHarvey, Reno, Sedgwick36 min
May 12, 4:28 PM CDTTornado WarningICTHarper, Kingman47 min
May 12, 4:40 PM CDTSevere Thunderstorm WarningICTHarper65 min
May 12, 4:43 PM CDTTornado WarningICTMarion17 min
May 12, 4:46 PM CDTSevere Thunderstorm WarningOUNEllis59 min
May 12, 4:53 PM CDTSevere Thunderstorm WarningOUNJackson, Kiowa, Washita17 min
May 12, 5:00 PM CDTSevere Thunderstorm WarningICTHarper, Kingman, Reno, Sedgwick, Sumner60 min
May 12, 5:00 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward45 min
May 12, 5:09 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills66 min
May 12, 5:22 PM CDTSevere Thunderstorm WarningICTSedgwick, Sumner42 min
May 12, 5:24 PM CDTSevere Thunderstorm WarningICTButler, Harvey, McPherson, Marion, Sedgwick66 min
May 12, 5:42 PM CDTTornado WarningOUNBeckham, Roger Mills48 min
May 12, 5:46 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward59 min
May 12, 6:02 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon43 min
May 12, 6:12 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer48 min
May 12, 6:14 PM CDTSevere Thunderstorm WarningTOPDickinson, Morris31 min
May 12, 6:17 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Osage, Shawnee43 min
May 12, 6:19 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills56 min
May 12, 6:22 PM CDTSevere Thunderstorm WarningICTHarvey, Marion34 min
May 12, 6:23 PM CDTTornado WarningOUNBeckham, Greer, Harmon52 min
May 12, 6:23 PM CDTTornado WarningOUNRoger Mills37 min
May 12, 6:37 PM CDTSevere Thunderstorm WarningICTChase36 min
May 12, 6:41 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin, Osage34 min
May 12, 6:57 PM CDTSevere Thunderstorm WarningOUNWoods44 min
May 12, 6:57 PM CDTTornado WarningOUNBeckham, Greer, Harmon48 min
May 12, 6:59 PM CDTSevere Thunderstorm WarningTOPLyon, Morris, Wabaunsee29 min
May 12, 7:27 PM CDTSevere Thunderstorm WarningOUNDewey, Major, Woodward49 min
May 12, 7:29 PM CDTSevere Thunderstorm WarningTOPDouglas16 min
May 12, 7:32 PM CDTSevere Thunderstorm WarningTOPOsage, Shawnee, Wabaunsee28 min
May 12, 7:35 PM CDTSevere Thunderstorm WarningOUNCuster, Washita40 min
May 12, 7:37 PM CDTSevere Thunderstorm WarningICTButler, Harvey, Sedgwick37 min
May 12, 7:47 PM CDTSevere Thunderstorm WarningOUNBeckham28 min
May 12, 7:52 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson, Shawnee38 min
May 12, 7:55 PM CDTTornado WarningOUNWashita35 min
May 12, 8:07 PM CDTSevere Thunderstorm WarningICTButler, Chase, Marion53 min
May 12, 8:13 PM CDTTornado WarningICTButler32 min
May 12, 8:14 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Washita61 min
May 12, 8:23 PM CDTTornado WarningOUNCuster, Washita52 min
May 12, 8:30 PM CDTSevere Thunderstorm WarningTOPJefferson, Lyon, Osage, Shawnee, Wabaunsee23 min
May 12, 8:43 PM CDTSevere Thunderstorm WarningICTChase43 min
May 12, 8:51 PM CDTTornado WarningOUNBlaine28 min
May 12, 9:11 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills79 min
May 12, 9:27 PM CDTSevere Thunderstorm WarningTOPLyon, Morris, Osage, Wabaunsee33 min
May 12, 9:38 PM CDTSevere Thunderstorm WarningICTButler, Chautauqua, Cowley, Elk, Greenwood24 min
May 12, 9:50 PM CDTSevere Thunderstorm WarningOUNBlaine, Garfield, Kingfisher, Major40 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

Lamont, OK (KLMN), launched 12:00Z, 7.7 hours before the alert went out and 104 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-pSkew-T log-p diagram, Lamont, OK at 12:00Z on 2010-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2005 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 12:00Z on 2010-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 406 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2005 J/kg
Mixed-layer CIN
-234 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
406 m²/s²
0-3 km storm-relative helicity
388 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 7:54 PM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Pratt, Sumner66 min
May 11, 8:11 PM CDTTornado WatchSPCBarber, Barton, Butler, Chase, Comanche, Cowley and 17 more8 hr
May 11, 8:40 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 3 more2 hr
May 11, 11:05 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Chautauqua, Clark and 32 more25 min
May 11, 11:16 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Bourbon, Butler and 54 more6 hr
May 12, 2:34 AM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Barton, Bourbon, Butler and 60 more56 min
May 12, 2:21 PM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Butler, Chase, Coffey and 21 more54 min
May 12, 5:14 PM CDTMesoscale DiscussionSPCAnderson, Bourbon, Franklin, Johnson, Leavenworth, Linn and 2 more91 min
May 12, 5:40 PM CDTTornado WatchSPCJohnson, Leavenworth, Miami, Wyandotte6 hr
May 12, 6:59 PM CDTMesoscale DiscussionSPCBarber, Butler, Chase, Coffey, Cowley, Dickinson and 13 more61 min
May 12, 4:41 PM CDTMesoscale DiscussionSPCChildress, Collingsworth, Cottle, Dickens, Donley, Gray and 5 more94 min
May 12, 5:08 PM CDTSevere Thunderstorm WatchSPCChildress, Collingsworth, Cottle, Crosby, Dickens, Donley and 10 more6 hr

Nearby

Tornado Watches in Oklahoma, 2010Tornado Watches in Kansas, 2010Tornado Watches in Texas, 2010Every 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.