Alert archive / Nebraska / Mesoscale Discussions in 2006

Mesoscale Discussion 438

April 6, 200630 counties in Kansas; 40 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2006, 12:12 PM CDT for 30 counties in Kansas; 40 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 6, 2006, 12:12 PM CDT (17:12 UTC)
Expired
Apr 6, 2006, 2:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 70 counties

Barton County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Lincoln County, KS, Marion County, KS, McPherson County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rooks County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lancaster County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 25 km from the middle of the area, began a volume at 17:11 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

Omaha, NE (KOAX), launched 12:00Z, 5.2 hours before the alert went out and 191 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, Omaha, NE at 12:00Z on 2006-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 349 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, Omaha, NE at 12:00Z on 2006-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
349 J/kg
Mixed-layer CIN
-546 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
103 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.

IssuedProductOfficeCountiesLasted
Apr 6, 6:01 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Franklin, Jackson and 13 more119 min
Apr 6, 12:43 PM CDTTornado WatchSPCAllen, Anderson, Barton, Brown, Butler, Chase and 47 more8 hr
Apr 6, 4:53 PM CDTMesoscale DiscussionSPCAtchison, Bourbon, Cherokee, Crawford, Doniphan, Douglas and 6 more97 min
Apr 6, 5:54 PM CDTTornado WatchSPCBourbon, Cherokee, Crawford, Linn, Miami7 hr
Apr 6, 1:20 AM CDTMesoscale DiscussionSPCAntelope, Boyd, Holt, Keya Paha, Knox, Rock85 min
Apr 6, 3:24 PM CDTMesoscale DiscussionSPCAntelope, Burt, Cedar, Cuming, Dakota, Dixon and 7 more2 hr
Apr 6, 5:18 PM CDTTornado WatchSPCAntelope, Boyd, Brown, Burt, Cedar, Cherry and 14 more5 hr

Nearby

Mesoscale Discussions in Nebraska, 2006Mesoscale Discussions in Kansas, 2006Every mesoscale discussion in 2006

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.