Alert archive / Colorado / Mesoscale Discussions in 2007

Mesoscale Discussion 1252

June 22, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2007, 2:00 PM MDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 22, 2007, 2:00 PM MDT (20:00 UTC)
Expired: Jun 22, 2007, 4:30 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 43 counties

Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent County, CO, Boulder County, CO, Broomfield County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Huerfano County, CO, Jefferson 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, Teller County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Hamilton County, KS, Morton County, KS, Sherman County, KS, Stanton County, KS, Wallace County, KS, Banner County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Kimball County, NE, Laramie County, WY

The radar

The Pueblo radar (KPUX), 114 km from the middle of the area, began a volume at 20:00 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.

Severe Thunderstorm Watch 444Jun 22, 2:25 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.0 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-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: 119 J/kg
Mixed-layer CIN: -458 J/kg
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 27 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
Jun 22, 2:22 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 16 more	7 hr
Jun 22, 5:48 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Elbert, Kiowa, Kit Carson and 8 more	117 min
Jun 21, 6:15 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Norton, Phillips, Rawlins, Smith	6 hr
Jun 21, 8:45 PM MDT	Mesoscale Discussion	SPC	Antelope, Boone, Boyd, Burt, Butler, Cedar and 21 more	2 hr
Jun 22, 1:21 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Burt, Butler, Cass, Clay and 36 more	114 min
Jun 22, 1:56 PM MDT	Severe Thunderstorm Watch	SPC	Burt, Butler, Cass, Clay, Colfax, Dodge and 13 more	6 hr

Nearby

Mesoscale Discussions in Colorado, 2007 Mesoscale Discussions in Kansas, 2007 Mesoscale Discussions in Nebraska, 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.