Alert archive / Oklahoma / Mesoscale Discussions in 2009

Mesoscale Discussion 647

April 30, 200921 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2009, 5:13 PM CDT for 21 counties in Oklahoma. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Apr 30, 2009, 5:13 PM CDT (22:13 UTC)
Expired: Apr 30, 2009, 6:45 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 21 counties

Alfalfa County, OK, Blaine County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Dewey County, OK, Garfield County, OK, Hughes County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Payne County, OK, Pottawatomie County, OK, Seminole County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 85 km from the middle of the area, began a volume at 22:18 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.

Severe Thunderstorm Watch 218Apr 30, 7:55 PM CDT

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 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, 1:55 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Haskell, McIntosh and 9 more	2 hr
Apr 30, 5:26 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Roger Mills	64 min

Nearby

Mesoscale Discussions in Oklahoma, 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.