Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 328

April 16, 2015Harper County, Sumner County, Kansas; 11 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2015, 9:17 PM CDT for Harper County, Sumner County, Kansas; 11 counties in Oklahoma. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 16, 2015, 9:17 PM CDT (02:17 UTC)
Expired
Apr 16, 2015, 10:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center

Counties Harper County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Major County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 58 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 2.3 hours before the alert went out and 209 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 2015-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 2015-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1121 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
149 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 16, 7:44 PM CDTMesoscale DiscussionSPCGrant, Greeley, Hamilton, Kearny, Morton, Stanton and 2 more61 min
Apr 17, 12:58 PM CDTMesoscale DiscussionSPCCheyenne, Logan, Rawlins, Sherman, Thomas, Wallace92 min
Apr 17, 3:06 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Finney and 24 more84 min
Apr 17, 5:05 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Greeley, Lane and 8 more2 hr
Apr 17, 5:37 PM CDTTornado WatchSPCCheyenne, Clark, Comanche, Decatur, Edwards, Ellis and 25 more7 hr
Apr 16, 7:08 PM CDTMesoscale DiscussionSPCBeckham, Ellis, Roger Mills2 hr
Apr 16, 7:16 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Comanche, Cotton, Custer and 10 more89 min
Apr 16, 8:56 PM CDTMesoscale DiscussionSPCRoger Mills94 min
Apr 16, 10:20 PM CDTMesoscale DiscussionSPCBeckham, Ellis, Harmon, Roger Mills2 hr
Apr 16, 11:59 PM CDTSevere Thunderstorm WatchSPCBeckham, Blaine, Custer, Dewey, Ellis, Greer and 4 more5 hr
Apr 17, 2:02 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Custer, Dewey, Ellis, Greer and 6 more88 min
Apr 17, 4:43 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Canadian, Comanche, Custer and 8 more62 min

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Kansas, 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.