Alert archive / Kansas / Mesoscale Discussions in 2013

Mesoscale Discussion 488

April 17, 201323 counties in Kansas; 5 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2013, 12:41 AM CDT for 23 counties in Kansas; 5 counties in Oklahoma. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Apr 17, 2013, 12:41 AM CDT (05:41 UTC)
Expired
Apr 17, 2013, 2:15 AM CDT
In force
94 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 28 counties

Barber County, KS, Butler County, KS, Chase County, KS, Clark County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellsworth County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Marion County, KS, McPherson County, KS, Morris County, KS, Ottawa County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Saline County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Grant County, OK, Harper County, OK, Woods County, OK, Woodward County, OK

The radar

The Wichita radar (KICT), 83 km from the middle of the area, began a volume at 05:42 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, 5.7 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 2013-04-17Temperature 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 00:00Z on 2013-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 271 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
906 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
271 m²/s²
0-3 km storm-relative helicity
484 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 9:50 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 17 more55 min
Apr 17, 11:11 AM CDTTornado WatchSPCBourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more11 hr
Apr 17, 1:09 PM CDTMesoscale DiscussionSPCBarber, Butler, Chautauqua, Cowley, Elk, Greenwood and 8 more96 min
Apr 17, 1:50 PM CDTTornado WatchSPCAllen, Anderson, Chautauqua, Coffey, Cowley, Douglas and 12 more8 hr
Apr 17, 3:38 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Johnson, Linn, Miami and 1 more97 min
Apr 17, 6:02 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 16 more88 min
Apr 17, 1:21 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cherokee, Cleveland and 45 more10 hr
Apr 17, 5:23 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Carter, Cherokee, Cleveland, Coal and 37 more97 min
Apr 17, 6:30 PM CDTMesoscale DiscussionSPCCleveland, Comanche, Grady, McClain90 min

Nearby

Mesoscale Discussions in Kansas, 2013Mesoscale Discussions in Oklahoma, 2013Every mesoscale discussion in 2013

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.