Alert archive / Kansas / Severe Thunderstorm Watches in 2009

Severe Thunderstorm Watch 384

June 11, 2009Prowers County, Colorado; 17 counties in Kansas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2009, 8:46 PM MDT for Prowers County, Colorado; 17 counties in Kansas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 11, 2009, 8:46 PM MDT (02:46 UTC)
Expired
Jun 12, 2009, 4:00 AM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt

Counties Prowers County, CO, Clark County, KS, Finney County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Lane County, KS, Meade County, KS, Morton County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS

The radar

The Goodland radar (KGLD), 139 km from the middle of the area, began a volume at 02:49 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
30%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 11, 9:10 PM MDTTornado WarningPUBProwers37 min
Jun 11, 9:18 PM MDTSevere Thunderstorm WarningDDCHamilton, Stanton72 min
Jun 11, 9:26 PM MDTSevere Thunderstorm WarningPUBKiowa, Prowers37 min
Jun 11, 9:26 PM MDTTornado WarningDDCHamilton, Stanton49 min
Jun 11, 10:13 PM MDTTornado WarningDDCGrant, Hamilton, Kearny, Stanton47 min
Jun 11, 10:50 PM MDTTornado WarningDDCFinney, Grant, Haskell, Kearny40 min
Jun 11, 11:07 PM MDTSevere Thunderstorm WarningDDCHamilton, Kearny38 min
Jun 11, 11:26 PM MDTSevere Thunderstorm WarningDDCGray, Haskell, Meade, Seward64 min
Jun 11, 11:35 PM MDTSevere Thunderstorm WarningDDCFinney, Kearny40 min
Jun 12, 12:15 AM MDTSevere Thunderstorm WarningDDCFinney, Gray, Haskell, Kearny45 min
Jun 12, 12:17 AM MDTTornado WarningDDCClark, Gray, Meade29 min
Jun 12, 12:29 AM MDTSevere Thunderstorm WarningDDCGrant, Kearny46 min
Jun 12, 12:39 AM MDTSevere Thunderstorm WarningDDCClark51 min
Jun 12, 12:59 AM MDTSevere Thunderstorm WarningDDCFinney, Ford, Gray, Hodgeman46 min
Jun 12, 1:16 AM MDTSevere Thunderstorm WarningDDCGrant, Haskell, Seward44 min
Jun 12, 1:28 AM MDTSevere Thunderstorm WarningDDCClark, Comanche, Kiowa62 min
Jun 12, 1:43 AM MDTSevere Thunderstorm WarningDDCFord, Gray, Hodgeman47 min
Jun 12, 1:56 AM MDTSevere Thunderstorm WarningDDCGray, Haskell, Meade, Seward64 min
Jun 12, 2:28 AM MDTSevere Thunderstorm WarningDDCFord, Kiowa62 min
Jun 12, 2:53 AM MDTSevere Thunderstorm WarningDDCClark, Ford52 min
Jun 12, 2:57 AM MDTSevere Thunderstorm WarningDDCClark, Meade48 min
Jun 12, 3:45 AM MDTSevere Thunderstorm WarningDDCClark, Ford, Kiowa, Meade45 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 00:00Z, 2.8 hours before the alert went out and 160 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, Dodge City, at 00:00Z on 2009-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 342 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, Dodge City, at 00:00Z on 2009-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939587897Sfc1 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
342 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 11, 8:00 PM MDTMesoscale DiscussionSPCBent, Kiowa, Prowers60 min
Jun 12, 1:44 PM MDTMesoscale DiscussionSPCBent, Crowley, Douglas, Elbert, El Paso, Kiowa and 4 more61 min
Jun 12, 4:04 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 18 more6 hr
Jun 11, 10:07 PM MDTMesoscale DiscussionSPCFinney, Grant, Gray, Greeley, Hamilton, Haskell and 8 more53 min
Jun 12, 12:01 AM MDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 24 more89 min
Jun 12, 1:04 AM MDTSevere Thunderstorm WatchSPCBarber, Butler, Chautauqua, Comanche, Cowley, Edwards and 14 more6 hr
Jun 12, 5:23 AM MDTMesoscale DiscussionSPCBarber, Butler, Chautauqua, Cherokee, Comanche, Cowley and 15 more67 min
Jun 12, 6:46 AM MDTSevere Thunderstorm WatchSPCChautauqua, Cowley, Sumner7 hr
Jun 12, 4:32 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Franklin, Jackson and 10 more58 min

Nearby

Severe Thunderstorm Watches in Kansas, 2009Severe Thunderstorm Watches in Colorado, 2009Every severe thunderstorm 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.