Alert archive / Colorado / Mesoscale Discussions in 2007

Mesoscale Discussion 1855

August 22, 200712 counties in Colorado; 5 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2007, 8:11 PM MDT for 12 counties in Colorado; 5 counties in Kansas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Aug 22, 2007, 8:11 PM MDT (02:11 UTC)
Expired: Aug 22, 2007, 9:45 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Arapahoe County, CO, Cheyenne County, CO, Crowley County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Pueblo County, CO, Washington County, CO, Yuma County, CO, Greeley County, KS, Logan County, KS, Sherman County, KS, Wallace County, KS, Wichita County, KS

The radar

The Pueblo radar (KPUX), 67 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 112 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: 95 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 2736 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Aug 23, 2:05 PM MDT	Mesoscale Discussion	SPC	Boulder, Clear Creek, Eagle, Garfield, Gilpin, Grand and 7 more	115 min
Aug 23, 2:31 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Crowley, El Paso, Kiowa, Las Animas and 3 more	2 hr
Aug 23, 4:18 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Crowley, Douglas, Elbert, El Paso and 9 more	5 hr
Aug 23, 2:57 PM MDT	Mesoscale Discussion	SPC	Brown, Marshall, Nemaha, Republic, Washington	93 min
Aug 23, 3:12 PM MDT	Mesoscale Discussion	SPC	Edwards, Ford, Gray, Haskell, Hodgeman, Meade and 5 more	2 hr
Aug 23, 4:49 PM MDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 9 more	6 hr
Aug 23, 5:04 PM MDT	Severe Thunderstorm Watch	SPC	Barton, Clark, Edwards, Ellis, Ellsworth, Finney and 24 more	6 hr

Nearby

Mesoscale Discussions in Colorado, 2007 Mesoscale Discussions in Kansas, 2007 Every mesoscale discussion in 2007

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.