Alert archive / Colorado / Mesoscale Discussions in 2018

Mesoscale Discussion 382

May 10, 20185 counties in Colorado; Cheyenne County, Sherman County, Kansas; Dundy County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 10, 2018, 6:06 PM MDT for 5 counties in Colorado; Cheyenne County, Sherman County, Kansas; Dundy County, Nebraska. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: May 10, 2018, 6:06 PM MDT (00:06 UTC)
Expired: May 10, 2018, 8:00 PM MDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Cheyenne County, CO, Kit Carson County, CO, Lincoln County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Sherman County, KS, Dundy County, NE

The radar

The Goodland radar (KGLD), 107 km from the middle of the area, began a volume at 00:09 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 81May 10, 7:00 PM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.1 hours before the alert went out and 50 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: 142 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 3927 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 106 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
May 10, 6:59 PM MDT	Severe Thunderstorm Watch	SPC	Yuma	9 hr
May 11, 12:00 PM MDT	Mesoscale Discussion	SPC	Boulder, Broomfield, Larimer, Weld	2 hr
May 11, 2:02 PM MDT	Severe Thunderstorm Watch	SPC	Larimer, Weld	7 hr
May 11, 5:39 PM MDT	Mesoscale Discussion	SPC	Larimer, Weld	96 min
May 11, 2:37 PM MDT	Mesoscale Discussion	SPC	Clark, Comanche, Meade, Seward	113 min
May 10, 6:39 PM MDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Buffalo, Chase, Custer and 25 more	2 hr
May 10, 10:16 PM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Chase, Custer and 19 more	89 min
May 11, 12:13 AM MDT	Mesoscale Discussion	SPC	Butler, Cass, Douglas, Gage, Jefferson, Johnson and 7 more	92 min
May 11, 12:50 AM MDT	Severe Thunderstorm Watch	SPC	Butler, Cass, Gage, Jefferson, Johnson, Lancaster and 6 more	3 hr
May 11, 3:24 AM MDT	Mesoscale Discussion	SPC	Adams, Butler, Cass, Clay, Colfax, Douglas and 22 more	66 min

Nearby

Mesoscale Discussions in Colorado, 2018 Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Nebraska, 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.