Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1480

July 2, 201133 counties in Kansas; 15 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2011, 10:46 PM CDT for 33 counties in Kansas; 15 counties in Nebraska. It was in force for 29 min.

The area

The outline as issued.

The facts

Issued
Jul 2, 2011, 10:46 PM CDT (03:46 UTC)
Expired
Jul 2, 2011, 11:15 PM CDT
In force
29 min
Issued by
the Storm Prediction Center
All 48 counties

Barton County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Graham County, KS, Jackson County, KS, Jewell County, KS, Lincoln County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Smith County, KS, Trego County, KS, Wabaunsee County, KS, Washington County, KS, Adams County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Harlan County, NE, Jefferson County, NE, Kearney County, NE, Nuckolls County, NE, Pawnee County, NE, Phelps County, NE, Thayer County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 91 km from the middle of the area, began a volume at 03:47 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

Topeka, KS (KTOP), launched 00:00Z, 3.8 hours before the alert went out and 235 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, Topeka, KS at 00:00Z on 2011-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3339 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, Topeka, KS at 00:00Z on 2011-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.1939Sfc1 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
3339 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1165 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

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.

IssuedProductOfficeCountiesLasted
Jul 2, 8:40 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Graham, Greeley and 10 more2 hr
Jul 2, 10:56 PM CDTSevere Thunderstorm WatchSPCBarton, Butler, Chase, Clay, Cloud, Dickinson and 38 more6 hr
Jul 3, 1:49 AM CDTMesoscale DiscussionSPCChase, Clay, Cloud, Dickinson, Ellsworth, Geary and 19 more86 min
Jul 3, 3:00 PM CDTMesoscale DiscussionSPCBarber, Butler, Chase, Clark, Comanche, Cowley and 14 more60 min
Jul 2, 7:48 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Dawes, Garden, Morrill, Scotts Bluff and 2 more117 min

Nearby

Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Nebraska, 2011Every mesoscale discussion in 2011

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.