Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 1806

September 13, 20157 counties in Kansas; 8 counties in Oklahoma; Lipscomb County, Ochiltree County, Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2015, 10:29 PM CDT for 7 counties in Kansas; 8 counties in Oklahoma; Lipscomb County, Ochiltree County, Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Sep 13, 2015, 10:29 PM CDT (03:29 UTC)
Expired
Sep 14, 2015, 1:00 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Barber County, KS, Clark County, KS, Comanche County, KS, Harper County, KS, Kingman County, KS, Kiowa County, KS, Pratt County, KS, Alfalfa County, OK, Beaver County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Woods County, OK, Woodward County, OK, Lipscomb County, TX, Ochiltree County, TX

The radar

The Vance AFB radar (KVNX), 120 km from the middle of the area, began a volume at 03:30 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, 3.5 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 00:00Z on 2015-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1068 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 2015-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.1939Sfc1 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
1068 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
2516 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Kansas, 2015Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

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.