Alert archive / Colorado / Mesoscale Discussions in 2008

Mesoscale Discussion 967

May 21, 20085 counties in Colorado; 5 counties in Nebraska; 4 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 21, 2008, 9:35 PM MDT for 5 counties in Colorado; 5 counties in Nebraska; 4 counties in Wyoming. It was in force for 25 min.

The area

The outline as issued.

The facts

Issued: May 21, 2008, 9:35 PM MDT (03:35 UTC)
Expired: May 21, 2008, 10:00 PM MDT
In force: 25 min
Issued by: the Storm Prediction Center

Counties Kit Carson County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 105 km from the middle of the area, began a volume at 03:35 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 nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.6 hours before the alert went out and 149 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 23 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 4811 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 64 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.

Issued	Product	Office	Counties	Lasted
May 21, 6:17 PM MDT	Mesoscale Discussion	SPC	Baca	118 min
May 21, 7:40 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kiowa, Kit Carson, Logan, Morgan, Phillips and 4 more	65 min
May 22, 11:06 AM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Denver, Kit Carson, Logan, Morgan and 4 more	24 min
May 22, 11:25 AM MDT	Tornado Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Cheyenne, Denver and 14 more	9 hr
May 22, 12:34 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Broomfield, Cheyenne, Denver, Douglas and 10 more	86 min
May 22, 4:50 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Broomfield, Cheyenne, Denver, Douglas and 10 more	85 min
May 22, 2:38 AM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 47 more	97 min
May 22, 12:52 PM MDT	Tornado Watch PDS	SPC	Buffalo, Dawson, Dundy, Franklin, Furnas, Gosper and 5 more	10 hr
May 22, 1:29 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Deuel, Frontier and 9 more	61 min
May 22, 2:13 PM MDT	Tornado Watch	SPC	Chase, Deuel, Frontier, Hayes, Keith, Lincoln and 1 more	7 hr
May 22, 2:22 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Blaine, Box Butte, Brown, Cherry and 15 more	7 hr
May 22, 3:02 PM MDT	Mesoscale Discussion	SPC	Dundy, Furnas, Harlan, Hitchcock, Red Willow	58 min
May 22, 5:46 PM MDT	Mesoscale Discussion	SPC	Buffalo, Chase, Dawson, Dundy, Franklin, Frontier and 11 more	59 min

Nearby

Mesoscale Discussions in Colorado, 2008 Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in Wyoming, 2008 Every mesoscale discussion in 2008

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.