Alert archive / Colorado / Mesoscale Discussions in 2004

Mesoscale Discussion 1585

July 9, 200413 counties in Colorado; 13 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2004, 5:59 PM MDT for 13 counties in Colorado; 13 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming. It was in force for 106 min.

The area

The outline as issued.

The facts

Issued: Jul 9, 2004, 5:59 PM MDT (23:59 UTC)
Expired: Jul 9, 2004, 7:45 PM MDT
In force: 106 min
Issued by: the Storm Prediction Center

All 29 counties

Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Arthur County, NE, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 123 km from the middle of the area, began a volume at 00:02 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 12:00Z, 12.0 hours before the alert went out and 161 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: 1706 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1337 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 25 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
Jul 9, 1:02 PM MDT	Mesoscale Discussion	SPC	Adams, Morgan, Weld	118 min
Jul 8, 7:05 PM MDT	Severe Thunderstorm Watch	SPC	Blaine, Brown, Chase, Custer, Dawson, Frontier and 13 more	6 hr
Jul 8, 8:45 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Butler, Clay, Franklin, Furnas and 13 more	6 hr
Jul 8, 9:58 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Butler, Clay, Dawson, Franklin and 18 more	92 min
Jul 8, 11:19 PM MDT	Mesoscale Discussion	SPC	Gage, Jefferson, Nuckolls, Pawnee, Saline, Thayer	56 min
Jul 8, 11:45 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Cass, Clay, Fillmore, Gage, Hamilton and 15 more	4 hr
Jul 9, 12:03 AM MDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Red Willow	57 min
Jul 9, 1:46 AM MDT	Mesoscale Discussion	SPC	Butler, Cass, Fillmore, Gage, Jefferson, Johnson and 10 more	89 min

Nearby

Mesoscale Discussions in Colorado, 2004 Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in Wyoming, 2004 Every mesoscale discussion in 2004

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.