Alert archive / Oklahoma / Mesoscale Discussions in 2017

Mesoscale Discussion 888

May 27, 2017Kingfisher County, Major County, Woodward County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 10:43 PM CDT for Kingfisher County, Major County, Woodward County, Oklahoma. It was in force for 32 min.

The area

The outline as issued.

The facts

Issued: May 27, 2017, 10:43 PM CDT (03:43 UTC)
Expired: May 27, 2017, 11:15 PM CDT
In force: 32 min
Issued by: the Storm Prediction Center

Counties Kingfisher County, OK, Major County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 72 km from the middle of the area, began a volume at 03:42 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

Norman, OK (KOUN), launched 00:00Z, 3.7 hours before the alert went out and 151 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: 5174 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1475 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.1

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.

Issued	Product	Office	Counties	Lasted
May 27, 7:12 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Texas	2 hr
May 27, 8:07 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Carter, Cherokee, Cleveland, Coal and 33 more	83 min
May 27, 9:07 PM CDT	Mesoscale Discussion	SPC	Beaver, Dewey, Ellis, Harper, Roger Mills, Woodward	53 min
May 27, 9:39 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Blaine, Custer, Dewey, Ellis, Garfield and 9 more	4 hr
May 27, 11:47 PM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 17 more	58 min
May 28, 12:06 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 10 more	5 hr
May 28, 12:52 AM CDT	Mesoscale Discussion	SPC	McCurtain	23 min
May 28, 2:53 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 6 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2017 Every 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.