Alert archive / Colorado / Mesoscale Discussions in 2015

Mesoscale Discussion 876

June 3, 201512 counties in Colorado; 4 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2015, 7:14 PM MDT for 12 counties in Colorado; 4 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Jun 3, 2015, 7:14 PM MDT (01:14 UTC)
Expired
Jun 3, 2015, 8:15 PM MDT
In force
61 min
Issued by
the Storm Prediction Center

Counties Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Jefferson County, CO, Lincoln County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Kimball County, NE, Scotts Bluff County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 42 km from the middle of the area, began a volume at 01:18 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 (KDEN), launched 00:00Z, 1.2 hours before the alert went out and 165 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 2015-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 840 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 2015-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
840 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1384 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 3, 8:59 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Logan, Morgan, Washington, Weld5 hr
Jun 3, 10:28 PM MDTMesoscale DiscussionSPCCheyenne, Crowley, Kiowa, Kit Carson, Lincoln62 min
Jun 3, 10:59 PM MDTSevere Thunderstorm WatchSPCCheyenne, Crowley, Kiowa, Kit Carson, Lincoln, Yuma6 hr
Jun 4, 1:53 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Elbert, Kit Carson, Lincoln, Logan and 3 more97 min
Jun 4, 2:20 PM MDTTornado WatchSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 6 more8 hr
Jun 4, 4:25 PM MDTMesoscale DiscussionSPCBaca, Bent, Crowley, El Paso, Las Animas, Otero and 2 more3 hr
Jun 4, 5:22 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 2 more113 min
Jun 3, 7:20 PM MDTMesoscale DiscussionSPCFillmore, Franklin, Gage, Jefferson, Lancaster, Nuckolls and 3 more115 min
Jun 3, 11:01 PM MDTMesoscale DiscussionSPCAdams, Clay, Fillmore, Franklin, Furnas, Gage and 10 more89 min
Jun 4, 12:56 AM MDTMesoscale DiscussionSPCAdams, Buffalo, Butler, Cass, Clay, Fillmore and 26 more94 min
Jun 4, 3:46 AM MDTMesoscale DiscussionSPCAdams, Clay, Fillmore, Franklin, Gage, Harlan and 7 more89 min
Jun 4, 11:26 AM MDTMesoscale DiscussionSPCAdams, Buffalo, Clay, Custer, Dawson, Fillmore and 17 more94 min
Jun 4, 2:28 PM MDTMesoscale DiscussionSPCHitchcock, Red Willow92 min
Jun 3, 7:49 PM MDTMesoscale DiscussionSPCCampbell, Converse, Fremont, Hot Springs, Johnson, Natrona and 3 more56 min
Jun 4, 1:29 AM MDTMesoscale DiscussionSPCNiobrara, Weston91 min

Nearby

Mesoscale Discussions in Colorado, 2015Mesoscale Discussions in Nebraska, 2015Mesoscale Discussions in Wyoming, 2015Every mesoscale discussion in 2015

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.