Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 588

May 10, 2015Cowley County, Kansas; 18 counties in Oklahoma; Archer County, Clay County, Montague County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 12:33 PM CDT for Cowley County, Kansas; 18 counties in Oklahoma; Archer County, Clay County, Montague County, Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2015, 12:33 PM CDT (17:33 UTC)
Expired: May 10, 2015, 3:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 22 counties

Cowley County, KS, Carter County, OK, Cleveland County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Kay County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK, Archer County, TX, Clay County, TX, Montague County, TX

The radar

The Norman radar (KTLX), 37 km from the middle of the area, began a volume at 17:34 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.

Tornado Watch 157May 10, 12:55 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 5.6 hours before the alert went out and 24 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: 1564 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 11.8

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
May 9, 8:10 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Decatur, Edwards and 14 more	95 min
May 10, 11:52 AM CDT	Mesoscale Discussion	SPC	Doniphan	2 hr
May 10, 1:47 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 33 more	8 hr
May 10, 3:13 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Coffey and 21 more	92 min
May 9, 7:49 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Jefferson, Johnston and 4 more	56 min
May 10, 4:20 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Cotton and 9 more	55 min
May 10, 6:44 AM CDT	Mesoscale Discussion	SPC	Bryan, Choctaw, McCurtain, Pushmataha	2 hr
May 10, 8:56 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 8 more	2 hr
May 10, 9:28 AM CDT	Tornado Watch	SPC	Adair, Cherokee, Choctaw, Craig, Delaware, Haskell and 11 more	6 hr
May 10, 10:19 AM CDT	Tornado Watch	SPC	McCurtain	13 hr
May 10, 12:58 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 41 more	10 hr
May 10, 3:22 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Cleveland, Coal, Creek, Garvin and 24 more	53 min
May 10, 5:39 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Creek and 12 more	96 min
May 10, 6:15 PM CDT	Mesoscale Discussion	SPC	Bryan, Choctaw, McCurtain	90 min
May 9, 8:06 PM CDT	Mesoscale Discussion	SPC	Dimmit, Frio, Kinney, La Salle, Maverick, Uvalde and 2 more	84 min
May 9, 9:38 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Comanche, Concho and 12 more	2 hr
May 9, 10:51 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Brown, Callahan, Coke, Coleman, Comanche and 33 more	10 hr
May 10, 2:06 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Concho, Crockett, Irion and 6 more	54 min
May 10, 2:55 AM CDT	Severe Thunderstorm Watch	SPC	Bosque, Collin, Comanche, Coryell, Dallas, Denton and 22 more	6 hr
May 10, 9:49 AM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Bosque, Brown, Burnet, Camp and 49 more	2 hr
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	Bandera, Bell, Blanco, Bosque, Bowie, Brown and 58 more	2 hr

Nearby

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