Alert archive / Colorado / Mesoscale Discussions in 2014

Mesoscale Discussion 864

June 6, 201423 counties in Colorado; 11 counties in Nebraska; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2014, 2:32 PM MDT for 23 counties in Colorado; 11 counties in Nebraska; 4 counties in South Dakota. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Jun 6, 2014, 2:32 PM MDT (20:32 UTC)
Expired
Jun 6, 2014, 3:30 PM MDT
In force
58 min
Issued by
the Storm Prediction Center
All 38 counties

Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Prowers County, CO, Pueblo County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Arthur County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, McPherson County, NE, Morrill County, NE, Sheridan County, NE, Bennett County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD

The radar

The Goodland radar (KGLD), 172 km from the middle of the area, began a volume at 20:35 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 12:00Z, 8.5 hours before the alert went out and 93 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 2014-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 367 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 2014-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 238 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
367 J/kg
Mixed-layer CIN
-256 J/kg
Mixed-layer LCL
1813 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
238 m²/s²
0-3 km storm-relative helicity
212 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 5, 6:37 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 17 more113 min
Jun 5, 10:49 PM MDTMesoscale DiscussionSPCBaca, Bent, Crowley, Las Animas, Otero116 min
Jun 6, 11:56 AM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Cheyenne, Crowley, Denver and 14 more2 hr
Jun 6, 12:38 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 20 more7 hr
Jun 6, 4:33 PM MDTSevere Thunderstorm WatchSPCCheyenne, Kit Carson, Yuma7 hr
Jun 6, 5:13 PM MDTMesoscale DiscussionSPCBent, Cheyenne, Crowley, Kiowa, Kit Carson, Lincoln and 4 more2 hr
Jun 6, 12:11 PM MDTMesoscale DiscussionSPCCherry, Cheyenne, Garden, Grant, Morrill, Sheridan2 hr
Jun 6, 12:49 PM MDTSevere Thunderstorm WatchSPCArthur, Banner, Chase, Cherry, Cheyenne, Custer and 15 more7 hr
Jun 6, 3:03 PM MDTMesoscale DiscussionSPCRed Willow117 min

Nearby

Mesoscale Discussions in Colorado, 2014Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in South Dakota, 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.