Alert archive / Oklahoma / Mesoscale Discussions in 2020

Mesoscale Discussion 591

May 14, 20206 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 14, 2020, 10:04 PM CDT for 6 counties in Oklahoma. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: May 14, 2020, 10:04 PM CDT (03:04 UTC)
Expired: May 15, 2020, 12:00 AM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Alfalfa County, OK, Dewey County, OK, Ellis County, OK, Major County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 75 km from the middle of the area, began a volume at 03:06 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, 3.1 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: 730 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1402 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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 15, 11:04 AM CDT	Mesoscale Discussion	SPC	Haskell, Hughes, Latimer, LeFlore, McIntosh, Okfuskee and 4 more	86 min
May 15, 1:08 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Caddo, Carter, Choctaw, Coal and 22 more	2 hr
May 15, 1:39 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Beckham, Bryan, Caddo, Carter, Choctaw and 25 more	8 hr
May 15, 3:36 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Caddo, Carter, Choctaw, Coal and 17 more	84 min
May 15, 6:59 PM CDT	Mesoscale Discussion	SPC	Bryan, Carter, Comanche, Cotton, Jefferson, Johnston and 5 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2020 Every mesoscale discussion in 2020

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.