Alert archive / Colorado / Mesoscale Discussions in 2020

Mesoscale Discussion 859

June 6, 202017 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2020, 5:14 PM MDT for 17 counties in Colorado. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 6, 2020, 5:14 PM MDT (23:14 UTC)
Expired: Jun 6, 2020, 7:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 262

Counties Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Crowley County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Pueblo County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO

The radar

The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 23:17 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, 11.2 hours before the alert went out and 14 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3284 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: -50 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
Jun 6, 7:01 AM MDT	Mesoscale Discussion	SPC	Delta, Dolores, Garfield, Mesa, Moffat, Montezuma and 3 more	2 hr
Jun 6, 9:48 AM MDT	Severe Thunderstorm Watch	SPC	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	6 hr
Jun 6, 11:29 AM MDT	Mesoscale Discussion	SPC	Adams, Alamosa, Arapahoe, Boulder, Broomfield, Clear Creek and 21 more	91 min
Jun 6, 12:21 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Alamosa, Arapahoe, Boulder, Broomfield, Chaffee and 33 more	8 hr

Nearby

Mesoscale Discussions in Colorado, 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.