Alert archive / Nebraska / Mesoscale Discussions in 2018

Mesoscale Discussion 33

January 21, 20184 counties in Colorado; 9 counties in Kansas; 15 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jan 21, 2018, 2:54 PM MST for 4 counties in Colorado; 9 counties in Kansas; 15 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 21, 2018, 2:54 PM MST (21:54 UTC)
Expired
Jan 21, 2018, 9:00 PM MST
In force
6 hr
Issued by
the Storm Prediction Center
All 28 counties

Cheyenne County, CO, Kit Carson County, CO, Phillips County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 112 km from the middle of the area, began a volume at 21:58 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, 9.9 hours before the alert went out and 192 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, Denver, CO at 12:00Z on 2018-01-21Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2018-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -57 square meters per square second.1939587897117Sfc1 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
656 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-57 m²/s²
0-3 km storm-relative helicity
80 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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Nearby

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