Alert archive / Kansas / Tornado Watches in 2009

Tornado Watch 307

May 15, 200935 counties in Kansas; 18 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this tornado watch at May 15, 2009, 3:02 PM CDT for 35 counties in Kansas; 18 counties in Oklahoma; 8 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 15, 2009, 3:02 PM CDT (20:02 UTC)
Expired
May 15, 2009, 9:39 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 61 counties

Allen County, KS, Anderson County, KS, Barber County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Comanche County, KS, Cowley County, KS, Dickinson County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Jefferson County, KS, Kingman County, KS, Labette County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Montgomery County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Pratt County, KS, Reno County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Major County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Vance AFB radar (KVNX), 32 km from the middle of the area, began a volume at 20:06 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
80%
One or more hailstones of 2 inches or more
70%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 15, 3:07 PM CDTSevere Thunderstorm WarningAMAOchiltree, Roberts53 min
May 15, 3:12 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Shawnee48 min
May 15, 3:19 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Shawnee41 min
May 15, 3:33 PM CDTSevere Thunderstorm WarningICTMcPherson, Reno, Rice57 min
May 15, 3:35 PM CDTSevere Thunderstorm WarningTOPDickinson, Morris40 min
May 15, 3:38 PM CDTSevere Thunderstorm WarningTOPJackson, Shawnee37 min
May 15, 3:43 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Shawnee, Wabaunsee32 min
May 15, 3:47 PM CDTFlash Flood WarningTOPDouglas, Jefferson, Shawnee4 hr
May 15, 3:50 PM CDTSevere Thunderstorm WarningTOPGeary, Riley, Wabaunsee10 min
May 15, 3:56 PM CDTSevere Thunderstorm WarningDDCPratt34 min
May 15, 3:58 PM CDTSevere Thunderstorm WarningAMAHutchinson, Ochiltree, Roberts37 min
May 15, 3:59 PM CDTSevere Thunderstorm WarningTOPJackson, Pottawatomie, Shawnee, Wabaunsee31 min
May 15, 4:00 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Osage, Shawnee45 min
May 15, 4:03 PM CDTSevere Thunderstorm WarningAMALipscomb33 min
May 15, 4:07 PM CDTSevere Thunderstorm WarningICTHarvey, Kingman, McPherson, Marion, Reno38 min
May 15, 4:09 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward66 min
May 15, 4:11 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Shawnee, Wabaunsee49 min
May 15, 4:18 PM CDTSevere Thunderstorm WarningTOPFranklin, Osage42 min
May 15, 4:19 PM CDTSevere Thunderstorm WarningDDCBarber, Pratt22 min
May 15, 4:26 PM CDTSevere Thunderstorm WarningTOPMorris49 min
May 15, 4:29 PM CDTTornado WarningAMAGray, Roberts46 min
May 15, 4:35 PM CDTSevere Thunderstorm WarningDDCComanche29 min
May 15, 4:43 PM CDTSevere Thunderstorm WarningICTHarvey, Reno, Sedgwick47 min
May 15, 4:49 PM CDTTornado WarningICTReno, Sedgwick41 min
May 15, 4:51 PM CDTSevere Thunderstorm WarningAMACarson, Gray, Hutchinson, Roberts54 min
May 15, 4:52 PM CDTSevere Thunderstorm WarningICTHarper, Kingman, Reno, Sedgwick53 min
May 15, 4:54 PM CDTFlash Flood WarningTOPShawnee112 min
May 15, 4:58 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin34 min
May 15, 5:02 PM CDTSevere Thunderstorm WarningDDCBarber43 min
May 15, 5:03 PM CDTTornado WarningAMAGray, Roberts42 min
May 15, 5:04 PM CDTSevere Thunderstorm WarningTOPLyon, Wabaunsee26 min
May 15, 5:11 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Ellis, Harper, Woods, Woodward64 min
May 15, 5:25 PM CDTSevere Thunderstorm WarningDDCBarber65 min
May 15, 5:28 PM CDTTornado WarningICTSedgwick47 min
May 15, 5:30 PM CDTSevere Thunderstorm WarningICTHarper, Kingman60 min
May 15, 5:30 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin, Osage30 min
May 15, 5:32 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Collingsworth, Donley, Gray, Wheeler58 min
May 15, 5:34 PM CDTTornado WarningAMAGray, Wheeler41 min
May 15, 5:36 PM CDTSevere Thunderstorm WarningDDCBarber39 min
May 15, 5:44 PM CDTSevere Thunderstorm WarningTOPCoffey, Lyon, Osage31 min
May 15, 5:47 PM CDTFlash Flood WarningTOPCoffey, Douglas, Franklin, Lyon, Osage, Wabaunsee4 hr
May 15, 5:48 PM CDTTornado WarningICTHarper, Kingman, Sumner42 min
May 15, 5:49 PM CDTSevere Thunderstorm WarningDDCBarber41 min
May 15, 5:59 PM CDTSevere Thunderstorm WarningTOPOsage16 min
May 15, 6:09 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant, Major, Woods, Woodward66 min
May 15, 6:11 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey, Douglas, Franklin, Osage49 min
May 15, 6:12 PM CDTSevere Thunderstorm WarningICTButler, Sedgwick, Sumner48 min
May 15, 6:18 PM CDTTornado WarningICTSumner42 min
May 15, 6:24 PM CDTSevere Thunderstorm WarningICTHarper, Sumner66 min
May 15, 6:25 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray51 min
May 15, 6:29 PM CDTSevere Thunderstorm WarningAMACollingsworth, Donley, Gray, Wheeler61 min
May 15, 6:31 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey37 min
May 15, 6:41 PM CDTFlash Flood WarningTOPAnderson, Coffey, Franklin4 hr
May 15, 6:45 PM CDTSevere Thunderstorm WarningAMACollingsworth, Wheeler60 min
May 15, 6:48 PM CDTSevere Thunderstorm WarningICTSumner31 min
May 15, 6:50 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills55 min
May 15, 7:01 PM CDTSevere Thunderstorm WarningICTSumner19 min
May 15, 7:28 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Dewey, Roger Mills, Washita62 min
May 15, 7:44 PM CDTSevere Thunderstorm WarningOUNBlaine, Custer, Dewey, Garfield, Grant, Kay and 5 more61 min
May 15, 7:54 PM CDTSevere Thunderstorm WarningOUNBeckham, Blaine, Caddo, Canadian, Custer, Dewey and 3 more66 min
May 15, 7:55 PM CDTSevere Thunderstorm WarningICTCowley35 min
May 15, 8:02 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee58 min
May 15, 8:17 PM CDTSevere Thunderstorm WarningICTChautauqua, Cowley, Elk43 min
May 15, 8:28 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Jackson, Kiowa32 min
May 15, 8:33 PM CDTSevere Thunderstorm WarningTSACreek, Nowata, Osage, Pawnee, Washington72 min
May 15, 8:46 PM CDTSevere Thunderstorm WarningOUNBlaine, Custer, Dewey, Kingfisher, Lincoln, Logan and 2 more59 min
May 15, 8:55 PM CDTSevere Thunderstorm WarningICTChautauqua, Montgomery50 min
May 15, 9:01 PM CDTSevere Thunderstorm WarningOUNBlaine, Caddo, Canadian, Grady44 min
May 15, 9:03 PM CDTSevere Thunderstorm WarningTSACraig, Creek, Mayes, Nowata, Okfuskee, Okmulgee and 7 more72 min
May 15, 9:30 PM CDTSevere Thunderstorm WarningICTLabette29 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, 8.0 hours before the alert went out and 91 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 2009-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1683 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 2009-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 275 square meters per square second.193958Sfc1 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
1683 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
876 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
275 m²/s²
0-3 km storm-relative helicity
393 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 15, 2:03 AM CDTMesoscale DiscussionSPCAtchison, Brown, Clay, Cloud, Dickinson, Doniphan and 17 more87 min
May 15, 7:14 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 3 more91 min
May 15, 7:42 AM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Clay, Cloud, Doniphan, Douglas and 18 more5 hr
May 15, 11:48 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Marshall, Nemaha57 min
May 15, 12:50 PM CDTTornado WatchSPCAtchison, Doniphan, Johnson, Leavenworth, Linn, Miami and 1 more7 hr
May 15, 2:44 PM CDTMesoscale DiscussionSPCAnderson, Barber, Butler, Chase, Coffey, Comanche and 24 more31 min
May 15, 3:01 PM CDTMesoscale DiscussionSPCJefferson, Leavenworth, Shawnee, Wyandotte59 min
May 15, 3:43 PM CDTMesoscale DiscussionSPCAtchison, Johnson, Leavenworth, Wyandotte62 min
May 15, 5:31 PM CDTMesoscale DiscussionSPCJohnson, Wyandotte119 min
May 15, 5:52 PM CDTMesoscale DiscussionSPCAnderson, Butler, Chase, Coffey, Cowley, Elk and 8 more53 min
May 15, 6:30 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford, Linn, Miami6 hr
May 14, 7:44 PM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Cottle, Crosby, Dawson and 22 more91 min
May 15, 2:18 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Cochran, Crane, Culberson, Ector and 12 more57 min

Nearby

Tornado Watches in Kansas, 2009Tornado Watches in Oklahoma, 2009Tornado Watches in Texas, 2009Every tornado watch in 2009

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.