Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 783

June 1, 2014Harper County, Kansas; 11 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2014, 7:43 PM CDT for Harper County, Kansas; 11 counties in Oklahoma. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2014, 7:43 PM CDT (00:43 UTC)
Expired: Jun 1, 2014, 9:15 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Harper County, KS, Alfalfa County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Major County, OK, Noble County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 35 km from the middle of the area, began a volume at 00:45 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.

Severe Thunderstorm Watch 204Jun 1, 9:10 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 174 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1234 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.5

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.

Issued	Product	Office	Counties	Lasted
Jun 1, 9:06 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Butler, Chase, Coffey, Cowley, Douglas and 9 more	4 hr
Jun 1, 10:43 PM CDT	Severe Thunderstorm Watch	SPC	Johnson, Linn, Miami, Wyandotte	2 hr
Jun 1, 10:50 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Butler, Chautauqua, Coffey, Cowley and 10 more	55 min
Jun 2, 5:05 PM CDT	Mesoscale Discussion	SPC	Harper, Sumner	85 min

Nearby

Mesoscale Discussions in Oklahoma, 2014 Mesoscale Discussions in Kansas, 2014 Every mesoscale discussion in 2014

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.