Alert archive / Colorado / Mesoscale Discussions in 2023

Mesoscale Discussion 751

May 9, 20234 counties in Colorado; Laramie County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 9, 2023, 7:28 PM MDT for 4 counties in Colorado; Laramie County, Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 9, 2023, 7:28 PM MDT (01:28 UTC)
Expired: May 9, 2023, 9:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Adams County, CO, Broomfield County, CO, Denver County, CO, Weld County, CO, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 63 km from the middle of the area, began a volume at 01:31 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.5 hours before the alert went out and 340 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: 1613 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -55 m²/s²
0-3 km storm-relative helicity: -78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
May 10, 12:17 AM MDT	Mesoscale Discussion	SPC	Boulder, Broomfield, Logan, Morgan, Sedgwick, Weld	58 min
May 10, 1:25 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Bent, Boulder, Broomfield, Cheyenne and 26 more	2 hr
May 10, 1:55 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Cheyenne, Denver, Douglas, Elbert and 11 more	7 hr
May 10, 2:21 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Crowley, Huerfano, Kiowa, Las Animas and 3 more	8 hr
May 10, 4:45 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Cheyenne, Denver, Douglas, Elbert and 9 more	90 min
May 10, 2:02 PM MDT	Mesoscale Discussion	SPC	Albany, Campbell, Carbon, Converse, Crook, Goshen and 6 more	88 min

Nearby

Mesoscale Discussions in Colorado, 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.