Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 472

May 20, 2018Polk County, Scott County, Sebastian County, Arkansas; 29 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 20, 2018, 1:11 AM CDT for Polk County, Scott County, Sebastian County, Arkansas; 29 counties in Oklahoma; 4 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2018, 1:11 AM CDT (06:11 UTC)
Expired: May 20, 2018, 3:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 36 counties

Polk County, AR, Scott County, AR, Sebastian County, AR, Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX

The radar

The Norman radar (KTLX), 99 km from the middle of the area, began a volume at 06:10 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 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 20, 11:43 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Independence and 11 more	3 hr
May 20, 12:32 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more	6 hr
May 20, 3:32 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more	118 min
May 20, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	Benton	4 hr
May 20, 6:25 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll	95 min
May 20, 6:26 PM CDT	Mesoscale Discussion	SPC	Arkansas, Craighead, Crittenden, Cross, Greene, Jackson and 8 more	64 min
May 19, 9:58 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Comanche, Cotton, Grady, Jackson and 11 more	107 min
May 20, 2:24 PM CDT	Mesoscale Discussion	SPC	Ottawa	3 hr
May 19, 7:42 PM CDT	Mesoscale Discussion	SPC	Coke, Concho, Crockett, Edwards, Irion, Kimble and 9 more	63 min
May 20, 1:23 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bandera, Bastrop, Bexar, Brazos and 30 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2018 Mesoscale Discussions in Texas, 2018 Mesoscale Discussions in Arkansas, 2018 Every mesoscale discussion in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.