Alert archive / Kansas / Mesoscale Discussions in 2016

Mesoscale Discussion 1707

September 17, 20167 counties in Colorado; 16 counties in Kansas; 6 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Sep 17, 2016, 1:44 PM MDT for 7 counties in Colorado; 16 counties in Kansas; 6 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 17, 2016, 1:44 PM MDT (19:44 UTC)
Expired
Sep 17, 2016, 3:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 29 counties

Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Lane County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Chase County, NE, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 9 km from the middle of the area, began a volume at 19:46 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

Denver, CO (KDEN), launched 12:00Z, 7.7 hours before the alert went out and 137 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 2016-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
5 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1928 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
131 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
Sep 17, 1:38 PM MDTMesoscale DiscussionSPCBaca, Bent2 hr
Sep 17, 2:19 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Kiowa, Las Animas, Otero, Prowers10 hr
Sep 17, 4:33 PM MDTMesoscale DiscussionSPCBaca, Prowers117 min

Nearby

Mesoscale Discussions in Kansas, 2016Mesoscale Discussions in Colorado, 2016Mesoscale Discussions in Nebraska, 2016Every mesoscale discussion in 2016

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.