Alert archive / Kansas / Mesoscale Discussions in 2005

Mesoscale Discussion 616

April 20, 20054 counties in Colorado; 10 counties in Kansas; 8 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2005, 6:25 PM MDT for 4 counties in Colorado; 10 counties in Kansas; 8 counties in Nebraska. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Apr 20, 2005, 6:25 PM MDT (00:25 UTC)
Expired
Apr 20, 2005, 8:00 PM MDT
In force
95 min
Issued by
the Storm Prediction Center
All 22 counties

Cheyenne County, CO, Kit Carson County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Logan County, KS, Norton 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, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 49 km from the middle of the area, began a volume at 00:22 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

Denver, CO (KDNR), launched 00:00Z, 0.4 hours before the alert went out and 126 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 2005-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2005-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.1939587897117Sfc1 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
563 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

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 20, 7:35 PM MDTSevere Thunderstorm WatchSPCLogan, Morgan, Phillips, Sedgwick, Washington, Yuma6 hr
Apr 20, 10:47 PM MDTMesoscale DiscussionSPCPhillips, Sedgwick, Washington, Yuma58 min
Apr 20, 8:29 PM MDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Geary, Jackson, Jewell and 13 more61 min
Apr 20, 8:45 PM MDTSevere Thunderstorm WatchSPCAtchison, Brown, Clay, Cloud, Dickinson, Douglas and 21 more7 hr
Apr 20, 8:51 PM MDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Ford, Kingman and 4 more84 min
Apr 20, 10:00 PM MDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Rawlins6 hr
Apr 20, 10:50 PM MDTMesoscale DiscussionSPCBrown, Clay, Cloud, Ellis, Geary, Jackson and 15 more85 min
Apr 20, 11:48 PM MDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 4 more57 min
Apr 21, 12:00 AM MDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 4 more4 hr
Apr 21, 2:34 AM MDTMesoscale DiscussionSPCBrown, Doniphan116 min
Apr 21, 10:13 AM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 4 more2 hr
Apr 21, 10:35 AM MDTTornado WatchSPCClay, Cloud, Jackson, Jewell, Marshall, Nemaha and 4 more5 hr
Apr 21, 12:45 PM MDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford, Linn5 hr
Apr 21, 12:48 PM MDTMesoscale DiscussionSPCAtchison, Jackson, Marshall, Nemaha, Pottawatomie, Riley and 1 more87 min
Apr 21, 2:05 PM MDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Doniphan, Douglas, Franklin and 11 more85 min
Apr 21, 2:35 PM MDTTornado WatchSPCAnderson, Atchison, Brown, Doniphan, Douglas, Franklin and 11 more7 hr
Apr 21, 3:51 PM MDTMesoscale DiscussionSPCAtchison54 min
Apr 21, 4:52 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 5 more53 min
Apr 21, 5:10 PM MDTTornado WatchSPCBourbon, Cherokee, Crawford, Linn7 hr
Apr 21, 5:51 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Franklin, Jackson and 7 more84 min
Apr 20, 10:45 PM MDTSevere Thunderstorm WatchSPCAdams, Cass, Clay, Fillmore, Gage, Hall and 13 more5 hr

Nearby

Mesoscale Discussions in Kansas, 2005Mesoscale Discussions in Nebraska, 2005Mesoscale Discussions in Colorado, 2005Every mesoscale discussion in 2005

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.