Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 558

May 28, 20184 counties in Colorado; 15 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at May 28, 2018, 4:54 PM MDT for 4 counties in Colorado; 15 counties in Kansas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 28, 2018, 4:54 PM MDT (22:54 UTC)
Expired: May 28, 2018, 6:30 PM MDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Cheyenne County, CO, Kit Carson County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Logan County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS

The radar

The Goodland radar (KGLD), 25 km from the middle of the area, began a volume at 22:57 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, 10.9 hours before the alert went out and 156 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: 69 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 173 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, 12:19 PM MDT	Mesoscale Discussion	SPC	Jackson, Routt	86 min
May 28, 12:46 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson	59 min
May 28, 1:12 PM MDT	Tornado Watch	SPC	Cheyenne, Kit Carson, Lincoln, Washington, Yuma	8 hr
May 28, 1:39 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 7 more	96 min
May 28, 2:01 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Crowley and 13 more	7 hr
May 28, 1:21 PM MDT	Mesoscale Discussion	SPC	Grant, Gray, Haskell, Kearny, Meade, Morton and 3 more	84 min
May 28, 2:17 PM MDT	Severe Thunderstorm Watch	SPC	Clark, Edwards, Finney, Ford, Grant, Gray and 11 more	10 hr
May 28, 5:10 PM MDT	Mesoscale Discussion	SPC	Clark, Edwards, Finney, Ford, Grant, Gray and 10 more	95 min

Nearby

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