Alert archive / Kansas / Tornado Watches in 2009

Tornado Watch 167

April 18, 200918 counties in Kansas; 9 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Apr 18, 2009, 1:28 PM CDT for 18 counties in Kansas; 9 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 18, 2009, 1:28 PM CDT (18:28 UTC)
Expired: Apr 18, 2009, 7:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 60 kt

All 27 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ellis County, KS, Finney County, KS, Ford County, KS, Gray County, KS, Hodgeman County, KS, Kiowa County, KS, Lane County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Rush County, KS, Scott County, KS, Stafford County, KS, Trego County, KS, Alfalfa County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Harper County, OK, Kingfisher County, OK, Major County, OK, Woods County, OK, Woodward County, OK

The radar

The Dodge City radar (KDDC), 35 km from the middle of the area, began a volume at 18:29 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: 60%
One or more EF2 to EF5 tornadoes: 20%
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: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 18, 1:40 PM CDT	Tornado Warning	DDC	Finney, Gray, Hodgeman	50 min
Apr 18, 2:04 PM CDT	Severe Thunderstorm Warning	DDC	Clark, Ford, Hodgeman	56 min
Apr 18, 2:14 PM CDT	Severe Thunderstorm Warning	DDC	Hodgeman, Ness	46 min
Apr 18, 2:18 PM CDT	Severe Thunderstorm Warning	DDC	Finney, Hodgeman, Lane, Ness	42 min
Apr 18, 2:24 PM CDT	Tornado Warning	DDC	Finney, Hodgeman, Lane, Ness	51 min
Apr 18, 2:27 PM CDT	Tornado Warning	DDC	Finney, Hodgeman, Ness	48 min
Apr 18, 2:28 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	47 min
Apr 18, 2:40 PM CDT	Severe Thunderstorm Warning	DDC	Comanche	50 min
Apr 18, 2:50 PM CDT	Tornado Warning	DDC	Hodgeman	40 min
Apr 18, 3:01 PM CDT	Tornado Warning	DDC	Ford, Kiowa	44 min
Apr 18, 3:04 PM CDT	Tornado Warning	DDC	Hodgeman, Ness	41 min
Apr 18, 3:08 PM CDT	Severe Thunderstorm Warning	OUN	Woods	52 min
Apr 18, 3:10 PM CDT	Tornado Warning	DDC	Finney, Gray, Haskell	35 min
Apr 18, 3:13 PM CDT	Severe Thunderstorm Warning	DDC	Clark, Comanche	47 min
Apr 18, 3:20 PM CDT	Tornado Warning	DDC	Edwards, Kiowa	40 min
Apr 18, 3:20 PM CDT	Tornado Warning	OUN	Woods	40 min
Apr 18, 3:24 PM CDT	Severe Thunderstorm Warning	DDC	Kiowa	39 min
Apr 18, 3:29 PM CDT	Severe Thunderstorm Warning	DDC	Barber, Comanche	47 min
Apr 18, 3:34 PM CDT	Tornado Warning	DDC	Hodgeman, Ness	41 min
Apr 18, 3:39 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	66 min
Apr 18, 3:40 PM CDT	Severe Thunderstorm Warning	DDC	Ness	26 min
Apr 18, 3:49 PM CDT	Severe Thunderstorm Warning	DDC	Pawnee, Rush	40 min
Apr 18, 3:59 PM CDT	Severe Thunderstorm Warning	OUN	Woods	61 min
Apr 18, 4:27 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woods, Woodward	48 min
Apr 18, 4:45 PM CDT	Tornado Warning	OUN	Alfalfa, Woods	45 min
Apr 18, 4:59 PM CDT	Severe Thunderstorm Warning	OUN	Woods	31 min
Apr 18, 5:10 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Dewey, Major, Woods	65 min
Apr 18, 5:18 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Woods	57 min
Apr 18, 6:11 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Grant, Kingfisher, Major	34 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

Dodge City, (KDDC), launched 12:00Z, 6.5 hours before the alert went out and 31 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: 68 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 17, 9:33 PM CDT	Mesoscale Discussion	SPC	Grant, Haskell, Meade, Morton, Seward, Stanton and 1 more	27 min
Apr 18, 1:14 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 6 more	61 min
Apr 18, 2:49 PM CDT	Mesoscale Discussion	SPC	Butler, Chase, Chautauqua, Cherokee, Cowley, Elk and 14 more	86 min
Apr 18, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Butler, Chase, Cowley, Ellsworth, Harper and 11 more	7 hr
Apr 18, 4:23 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more	8 hr
Apr 18, 3:11 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 27 more	9 hr
Apr 18, 5:14 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Bryan, Canadian, Carter, Cleveland, Coal and 24 more	91 min

Nearby

Tornado Watches in Kansas, 2009 Tornado Watches in Oklahoma, 2009 Every 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.