Alert archive / Kansas / Tornado Watches in 2009

Tornado Watch 124

April 9, 20099 counties in Kansas

The Storm Prediction Center issued this tornado watch at Apr 9, 2009, 4:53 PM CDT for 9 counties in Kansas. It was in force for 100 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2009, 4:53 PM CDT (21:53 UTC)
Expired
Apr 9, 2009, 6:33 PM CDT
In force
100 min
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
50 kt

Counties Edwards County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Pratt County, KS, Reno County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS

The radar

The Wichita radar (KICT), 70 km from the middle of the area, began a volume at 21:56 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
30%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
20%
One or more gusts of 65 knots or more
10%
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
50%

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, 9.9 hours before the alert went out and 146 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 2009-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2009-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1958 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
360 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
Apr 9, 12:57 PM CDTMesoscale DiscussionSPCAllen, Butler, Chautauqua, Cherokee, Cowley, Crawford and 13 more63 min
Apr 9, 1:44 PM CDTTornado WatchSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more7 hr
Apr 9, 4:30 PM CDTMesoscale DiscussionSPCEdwards, Kingman, Pawnee, Pratt, Reno, Sedgwick and 2 more60 min
Apr 9, 5:39 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chase, Cherokee, Coffey and 8 more2 hr
Apr 9, 6:14 PM CDTMesoscale DiscussionSPCHarvey, Pratt, Reno, Sedgwick, Stafford61 min
Apr 9, 6:59 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Cherokee, Crawford, Labette, Linn and 1 more91 min

Nearby

Tornado Watches in Kansas, 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.