Alert archive / Colorado / Mesoscale Discussions in 2023

Mesoscale Discussion 1349

June 29, 20234 counties in Colorado; Banner County, Kimball County, Nebraska; Albany County, Laramie County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2023, 6:52 PM MDT for 4 counties in Colorado; Banner County, Kimball County, Nebraska; Albany County, Laramie County, Wyoming. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 29, 2023, 6:52 PM MDT (00:52 UTC)
Expired: Jun 29, 2023, 8:15 PM MDT
In force: 83 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 419

Counties Adams County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Kimball County, NE, Albany County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 57 km from the middle of the area, began a volume at 00:56 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, 0.9 hours before the alert went out and 317 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: 387 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 1917 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 30, 12:10 PM MDT	Mesoscale Discussion	SPC	Bent, Cheyenne, Crowley, El Paso, Kiowa, Kit Carson and 8 more	2 hr
Jun 30, 12:56 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Cheyenne, Crowley, Elbert, El Paso and 10 more	6 hr
Jun 29, 6:26 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Brown, Cherry, Custer, Deuel and 12 more	7 hr
Jun 29, 7:53 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Brown, Cherry, Custer, Deuel and 11 more	97 min
Jun 29, 10:25 PM MDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Custer, Garfield, Holt and 7 more	95 min
Jun 30, 5:18 PM MDT	Severe Thunderstorm Watch	SPC	Franklin, Furnas, Harlan, Webster	5 hr

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.