Alert archive / Colorado / Mesoscale Discussions in 2004

Mesoscale Discussion 1943

August 10, 200421 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2004, 12:41 PM MDT for 21 counties in Colorado. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2004, 12:41 PM MDT (18:41 UTC)
Expired: Aug 10, 2004, 2:15 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center

All 21 counties

Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent 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, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO, Washington County, CO, Yuma County, CO

The radar

The Pueblo radar (KPUX), 33 km from the middle of the area, began a volume at 18:44 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.

Tornado Watch 731Aug 10, 1:15 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 6.7 hours before the alert went out and 186 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: 1020 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1129 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 9, 6:45 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 9 more	4 hr
Aug 9, 9:29 PM MDT	Mesoscale Discussion	SPC	Bent, Cheyenne, Crowley, Kiowa, Otero, Prowers	61 min
Aug 10, 1:15 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 20 more	8 hr

Nearby

Mesoscale Discussions in Colorado, 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.