Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 540

April 22, 200724 counties in Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2007, 3:51 PM CDT for 24 counties in Oklahoma; 6 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 22, 2007, 3:51 PM CDT (20:51 UTC)
Expired: Apr 22, 2007, 6:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 30 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Creek County, OK, Garvin County, OK, Hughes County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McIntosh County, OK, Murray County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Collin County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX, Montague County, TX, Wise County, TX

The radar

The Norman radar (KTLX), 78 km from the middle of the area, began a volume at 20:57 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, 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
Apr 21, 7:41 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Texas	2 hr
Apr 21, 10:45 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Caddo, Comanche and 14 more	60 min
Apr 21, 11:02 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 8 more	3 hr

Nearby

Mesoscale Discussions in Oklahoma, 2007 Mesoscale Discussions in Texas, 2007 Every mesoscale discussion in 2007

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.