Alert archive / Kansas / Mesoscale Discussions in 2007

Mesoscale Discussion 555

April 24, 20074 counties in Colorado; 12 counties in Kansas; 7 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2007, 12:37 AM MDT for 4 counties in Colorado; 12 counties in Kansas; 7 counties in Nebraska. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Apr 24, 2007, 12:37 AM MDT (06:37 UTC)
Expired
Apr 24, 2007, 2:00 AM MDT
In force
83 min
Issued by
the Storm Prediction Center
All 23 counties

Cheyenne County, CO, Kit Carson County, CO, Phillips County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Chase County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Hayes County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 59 km from the middle of the area, began a volume at 06:38 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 nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 6.6 hours before the alert went out and 153 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, Denver, CO at 00:00Z on 2007-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 351 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2007-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
351 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1440 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.5

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
Apr 23, 6:52 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 10 more113 min
Apr 23, 9:41 PM MDTTornado WatchSPCKit Carson, Yuma5 hr
Apr 24, 1:48 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Lincoln, Yuma117 min
Apr 23, 7:54 PM MDTMesoscale DiscussionSPCBarber, Barton, Butler, Cheyenne, Clark, Comanche and 55 more2 hr
Apr 23, 8:53 PM MDTSevere Thunderstorm WatchSPCJewell, Mitchell, Osborne, Phillips, Rooks, Smith8 hr
Apr 24, 4:03 AM MDTMesoscale DiscussionSPCGraham, Jewell, Lincoln, Mitchell, Norton, Osborne and 3 more87 min
Apr 24, 9:04 AM MDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 40 more116 min
Apr 24, 9:48 AM MDTTornado WatchSPCBarber, Barton, Butler, Chase, Chautauqua, Clay and 41 more10 hr
Apr 24, 1:03 PM MDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 26 more87 min
Apr 24, 2:24 PM MDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 24 more5 hr
Apr 24, 2:37 PM MDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Chautauqua, Clay and 33 more83 min
Apr 24, 5:13 PM MDTMesoscale DiscussionSPCButler, Chase, Chautauqua, Clay, Cloud, Cowley and 17 more62 min
Apr 24, 12:35 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Butler, Cass, Clay, Custer and 34 more55 min
Apr 24, 12:48 PM MDTSevere Thunderstorm WatchSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 21 more5 hr

Nearby

Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Colorado, 2007Every mesoscale discussion in 2007

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.