Alert archive / Kansas / Mesoscale Discussions in 2009

Mesoscale Discussion 412

April 9, 200919 counties in Kansas; 7 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2009, 12:57 PM CDT for 19 counties in Kansas; 7 counties in Oklahoma. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Apr 9, 2009, 12:57 PM CDT (17:57 UTC)
Expired: Apr 9, 2009, 2:00 PM CDT
In force: 63 min
Issued by: the Storm Prediction Center

All 26 counties

Allen County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Craig County, OK, Grant County, OK, Kay County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK

The radar

The Wichita radar (KICT), 57 km from the middle of the area, began a volume at 18:00 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 6.0 hours before the alert went out and 88 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: 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

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 1:44 PM CDT	Tornado Watch	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more	7 hr
Apr 9, 4:30 PM CDT	Mesoscale Discussion	SPC	Edwards, Kingman, Pawnee, Pratt, Reno, Sedgwick and 2 more	60 min
Apr 9, 4:53 PM CDT	Tornado Watch	SPC	Edwards, Harvey, Kingman, Kiowa, Pratt, Reno and 3 more	100 min
Apr 9, 5:39 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chase, Cherokee, Coffey and 8 more	2 hr
Apr 9, 6:14 PM CDT	Mesoscale Discussion	SPC	Harvey, Pratt, Reno, Sedgwick, Stafford	61 min
Apr 9, 6:59 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Cherokee, Crawford, Labette, Linn and 1 more	91 min
Apr 9, 12:47 PM CDT	Mesoscale Discussion	SPC	Atoka, Cherokee, Coal, Creek, Haskell, Hughes and 18 more	2 hr

Nearby

Mesoscale Discussions in Kansas, 2009 Mesoscale Discussions in Oklahoma, 2009 Every mesoscale discussion 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.