Alert archive / Colorado / Mesoscale Discussions in 2018

Mesoscale Discussion 567

May 29, 201810 counties in Colorado; Cheyenne County, Kansas; 7 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 29, 2018, 2:10 PM MDT for 10 counties in Colorado; Cheyenne County, Kansas; 7 counties in Nebraska. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: May 29, 2018, 2:10 PM MDT (20:10 UTC)
Expired: May 29, 2018, 3:45 PM MDT
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Cheyenne County, CO, El Paso County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Keith County, NE, Perkins County, NE

The radar

The Denver radar (KFTG), 113 km from the middle of the area, began a volume at 20:13 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 (KDEN), launched 12:00Z, 8.2 hours before the alert went out and 4 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: 32 J/kg
Mixed-layer CIN: -249 J/kg
Mixed-layer LCL: 1831 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 0 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
May 28, 6:08 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Elbert, Logan, Morgan, Weld	97 min
May 28, 8:06 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Graham, Norton, Osborne and 7 more	84 min
May 28, 8:08 PM MDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Ford, Gray, Hodgeman and 5 more	67 min
May 29, 12:55 PM MDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Ford, Harper and 9 more	65 min
May 29, 1:01 PM MDT	Mesoscale Discussion	SPC	Atchison, Brown, Geary, Jackson, Jefferson, Lyon and 7 more	89 min
May 29, 1:19 PM MDT	Tornado Watch	SPC	Barber, Clark, Comanche, Harper, Kingman, Sedgwick and 1 more	8 hr
May 29, 1:40 PM MDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 33 more	7 hr
May 29, 4:04 PM MDT	Mesoscale Discussion	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 26 more	116 min
May 29, 4:56 PM MDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Harper, Kingman, Meade and 2 more	2 hr

Nearby

Mesoscale Discussions in Colorado, 2018 Mesoscale Discussions in Nebraska, 2018 Mesoscale Discussions in Kansas, 2018 Every mesoscale discussion in 2018

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.