Alert archive / Colorado / Mesoscale Discussions in 2017

Mesoscale Discussion 848

May 26, 201721 counties in Colorado; 17 counties in Kansas; 13 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 26, 2017, 5:14 PM MDT for 21 counties in Colorado; 17 counties in Kansas; 13 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 26, 2017, 5:14 PM MDT (23:14 UTC)
Expired
May 26, 2017, 7:15 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 51 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, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Prowers County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Finney County, KS, Grant County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Logan County, KS, Morton County, KS, Rawlins County, KS, Scott County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Banner County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE

The radar

The Goodland radar (KGLD), 90 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 68 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 2017-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1013 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
189 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 11:43 AM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Elbert and 4 more2 hr
May 26, 1:00 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Baca, Bent, Boulder, Broomfield and 22 more9 hr
May 26, 2:38 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Boulder, Broomfield, Cheyenne and 15 more97 min
May 25, 7:10 PM MDTMesoscale DiscussionSPCBarton, Ellis, Graham, Lane, Ness, Osborne and 5 more65 min

Nearby

Mesoscale Discussions in Colorado, 2017Mesoscale Discussions in Kansas, 2017Mesoscale Discussions in Nebraska, 2017Every mesoscale discussion in 2017

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.