Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1156

July 25, 2018Cheyenne County, Kit Carson County, Colorado; 36 counties in Kansas; Furnas County, Hitchcock County, Red Willow County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2018, 12:56 PM MDT for Cheyenne County, Kit Carson County, Colorado; 36 counties in Kansas; Furnas County, Hitchcock County, Red Willow County, Nebraska. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 25, 2018, 12:56 PM MDT (18:56 UTC)
Expired
Jul 25, 2018, 3:30 PM MDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 41 counties

Cheyenne County, CO, Kit Carson County, CO, Barton County, KS, Cheyenne County, KS, Decatur County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Pawnee County, KS, Phillips County, KS, Rawlins County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Stafford County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Furnas County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 129 km from the middle of the area, began a volume at 18:59 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.

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 6.9 hours before the alert went out and 134 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-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2018-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2018-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1847 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
134 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.

IssuedProductOfficeCountiesLasted
Jul 25, 12:48 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 7 more57 min
Jul 25, 1:22 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more6 hr
Jul 25, 4:29 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson and 5 more7 hr
Jul 25, 5:08 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 14 more2 hr
Jul 25, 4:01 AM MDTMesoscale DiscussionSPCArthur, Garden, Grant, Hooker, McPherson, Sheridan119 min

Nearby

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