Alert archive / Colorado / Mesoscale Discussions in 2020

Mesoscale Discussion 1379

August 2, 202020 counties in Colorado; 7 counties in New Mexico

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2020, 1:28 PM MDT for 20 counties in Colorado; 7 counties in New Mexico. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 2, 2020, 1:28 PM MDT (19:28 UTC)
Expired: Aug 2, 2020, 3:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

All 27 counties

Adams County, CO, Alamosa County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Costilla County, CO, Custer County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Fremont County, CO, Gilpin County, CO, Huerfano County, CO, Jefferson County, CO, Larimer County, CO, Las Animas County, CO, Park County, CO, Pueblo County, CO, Teller County, CO, Colfax County, NM, Guadalupe County, NM, Harding County, NM, Mora County, NM, Quay County, NM, San Miguel County, NM, Taos County, NM

The radar

The Pueblo radar (KPUX), 145 km from the middle of the area, began a volume at 19:29 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.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 7.5 hours before the alert went out and 322 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: 6 J/kg
Mixed-layer CIN: -422 J/kg
Mixed-layer LCL: 2146 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 1:58 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Crowley and 18 more	7 hr
Aug 2, 2:29 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, Colfax, Curry, De Baca, Guadalupe, Harding and 7 more	7 hr

Nearby

Mesoscale Discussions in Colorado, 2020 Mesoscale Discussions in New Mexico, 2020 Every mesoscale discussion in 2020

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.