Alert archive / Colorado / Mesoscale Discussions in 2014

Mesoscale Discussion 1108

June 21, 201414 counties in Colorado; 9 counties in Kansas; Dundy County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2014, 2:43 PM MDT for 14 counties in Colorado; 9 counties in Kansas; Dundy County, Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 21, 2014, 2:43 PM MDT (20:43 UTC)
Expired
Jun 21, 2014, 4:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 24 counties

Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Prowers County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Hamilton County, KS, Kearny County, KS, Logan County, KS, Sherman County, KS, Stanton County, KS, Wallace County, KS, Wichita County, KS, Dundy County, NE

The radar

The Goodland radar (KGLD), 89 km from the middle of the area, began a volume at 20:46 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 (KDEN), launched 12:00Z, 8.7 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2014-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 37 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 12:00Z on 2014-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.193958Sfc1 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
37 J/kg
Mixed-layer CIN
-319 J/kg
Mixed-layer LCL
2293 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
20 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
Jun 20, 6:05 PM MDTMesoscale DiscussionSPCLogan, Phillips, Sedgwick, Washington, Yuma85 min
Jun 20, 7:29 PM MDTMesoscale DiscussionSPCBrown, Decatur, Jewell, Marshall, Nemaha, Norton and 4 more91 min
Jun 20, 7:51 PM MDTSevere Thunderstorm WatchSPCBrown, Doniphan, Jewell, Marshall, Nemaha, Phillips and 3 more6 hr
Jun 21, 12:57 AM MDTMesoscale DiscussionSPCBrown, Doniphan, Jewell, Marshall, Nemaha, Phillips and 3 more63 min
Jun 20, 10:28 PM MDTMesoscale DiscussionSPCAdams, Burt, Butler, Cass, Clay, Colfax and 29 more92 min
Jun 21, 1:23 PM MDTMesoscale DiscussionSPCBox Butte, Dawes, Garden, Morrill, Scotts Bluff, Sheridan and 1 more67 min
Jun 21, 1:56 PM MDTSevere Thunderstorm WatchSPCArthur, Banner, Box Butte, Brown, Cherry, Cheyenne and 14 more7 hr
Jun 21, 4:49 PM MDTMesoscale DiscussionSPCCherry, Grant, Hooker86 min

Nearby

Mesoscale Discussions in Colorado, 2014Mesoscale Discussions in Kansas, 2014Mesoscale Discussions in Nebraska, 2014Every mesoscale discussion in 2014

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.