Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 407

April 21, 200440 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 21, 2004, 12:58 PM CDT for 40 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 21, 2004, 12:58 PM CDT (17:58 UTC)
Expired
Apr 21, 2004, 3:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 40 counties

Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Latimer County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Roger Mills County, OK, Seminole County, OK, Washita County, OK

The radar

The Norman radar (KTLX), 51 km from the middle of the area, began a volume at 18:04 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.

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.

IssuedProductOfficeCountiesLasted
Apr 20, 7:22 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Creek, Delaware, Kay and 12 more23 min
Apr 20, 7:50 PM CDTTornado WatchSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more5 hr
Apr 20, 8:57 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more2 hr
Apr 20, 10:39 PM CDTMesoscale DiscussionSPCHaskell, Hughes, Latimer, LeFlore, McIntosh, Muskogee and 6 more3 hr
Apr 20, 10:57 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 13 more93 min
Apr 21, 1:50 PM CDTTornado WatchSPCAdair, Alfalfa, Atoka, Beckham, Blaine, Caddo and 55 more7 hr
Apr 21, 1:56 PM CDTMesoscale DiscussionSPCBeaver, Cimarron, Texas94 min
Apr 21, 3:00 PM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Texas6 hr
Apr 21, 4:39 PM CDTMesoscale DiscussionSPCAdair, Alfalfa, Atoka, Beckham, Blaine, Caddo and 47 more66 min
Apr 21, 5:09 PM CDTMesoscale DiscussionSPCBeaver, Cimarron, Texas66 min
Apr 21, 6:02 PM CDTMesoscale DiscussionSPCAdair, Alfalfa, Atoka, Blaine, Canadian, Cherokee and 43 more88 min

Nearby

Mesoscale Discussions in Oklahoma, 2004Every mesoscale discussion in 2004

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.