Alert archive / Colorado / Mesoscale Discussions in 2023

Mesoscale Discussion 1213

June 22, 202312 counties in Colorado; 6 counties in Nebraska; 5 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2023, 5:56 PM MDT for 12 counties in Colorado; 6 counties in Nebraska; 5 counties in Wyoming. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2023, 5:56 PM MDT (23:56 UTC)
Expired: Jun 22, 2023, 7:30 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 358

All 23 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Morgan County, CO, Weld County, CO, Banner County, NE, Box Butte County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 40 km from the middle of the area, began a volume at 23:59 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

Grand Junction, CO (KGJT), launched 12:00Z, 11.9 hours before the alert went out and 347 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: 2938 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 21 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 21, 7:04 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson and 2 more	116 min
Jun 21, 7:58 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more	92 min
Jun 21, 9:58 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Bent, Cheyenne, Clear Creek, Crowley and 12 more	8 hr
Jun 22, 2:34 AM MDT	Mesoscale Discussion	SPC	Baca, Bent, Crowley, Kiowa, Otero, Prowers	116 min
Jun 22, 11:08 AM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 7 more	2 hr
Jun 22, 12:14 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 9 more	10 hr
Jun 22, 1:06 PM MDT	Severe Thunderstorm Watch	SPC	Las Animas	7 hr
Jun 22, 2:37 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Jefferson and 2 more	83 min
Jun 22, 4:01 PM MDT	Mesoscale Discussion	SPC	Las Animas	89 min

Nearby

Mesoscale Discussions in Colorado, 2023 Mesoscale Discussions in Nebraska, 2023 Mesoscale Discussions in Wyoming, 2023 Every mesoscale discussion in 2023

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.