Alert archive / Oklahoma / Mesoscale Discussions in 2009

Mesoscale Discussion 645

April 30, 200911 counties in Arkansas; 15 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2009, 1:55 PM CDT for 11 counties in Arkansas; 15 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 30, 2009, 1:55 PM CDT (18:55 UTC)
Expired: Apr 30, 2009, 4:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Perry County, AR, Pope County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 81 km from the middle of the area, began a volume at 18:55 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 30, 3:34 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 19 more	86 min
Apr 30, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Faulkner, Greene and 11 more	5 hr
Apr 29, 9:27 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Bryan, Carter, Comanche, Cotton, Greer and 10 more	4 hr
Apr 29, 11:54 PM CDT	Mesoscale Discussion	SPC	Beckham, Carter, Comanche, Cotton, Greer, Harmon and 7 more	96 min
Apr 30, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Carter, Cotton, Harmon, Jackson and 5 more	6 hr
Apr 30, 3:13 AM CDT	Mesoscale Discussion	SPC	Cotton, Jefferson, Love, Tillman	92 min
Apr 30, 5:13 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Cleveland, Creek, Dewey and 15 more	92 min
Apr 30, 5:26 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Roger Mills	64 min

Nearby

Mesoscale Discussions in Oklahoma, 2009 Mesoscale Discussions in Arkansas, 2009 Every mesoscale discussion in 2009

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.