Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1687

October 2, 201715 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Oct 2, 2017, 9:16 PM CDT for 15 counties in Kansas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Oct 2, 2017, 9:16 PM CDT (02:16 UTC)
Expired
Oct 2, 2017, 10:45 PM CDT
In force
89 min
Issued by
the Storm Prediction Center

Counties Ellis County, KS, Finney County, KS, Gove County, KS, Graham County, KS, Lane County, KS, Logan County, KS, Ness County, KS, Norton County, KS, Phillips County, KS, Rooks County, KS, Scott County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Wichita County, KS

The radar

The Dodge City radar (KDDC), 122 km from the middle of the area, began a volume at 02:16 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

Dodge City, (KDDC), launched 00:00Z, 2.3 hours before the alert went out and 123 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 00:00Z on 2017-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2098 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2017-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.19395878Sfc1 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
2098 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1361 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
234 m²/s²
Significant tornado parameter
1.0
Supercell composite
10.2

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
Oct 2, 7:14 PM CDTMesoscale DiscussionSPCEllis, Finney, Gove, Graham, Grant, Gray and 19 more2 hr
Oct 2, 8:18 PM CDTMesoscale DiscussionSPCCheyenne2 hr

Nearby

Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017

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.