Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 1639

July 21, 2009Little River County, Arkansas; Bryan County, Choctaw County, McCurtain County, Oklahoma; 37 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2009, 11:58 AM CDT for Little River County, Arkansas; Bryan County, Choctaw County, McCurtain County, Oklahoma; 37 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 21, 2009, 11:58 AM CDT (16:58 UTC)
Expired: Jul 21, 2009, 1:30 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 41 counties

Little River County, AR, Bryan County, OK, Choctaw County, OK, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 113 km from the middle of the area, began a volume at 16:59 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 612Jul 21, 3:15 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
Jul 21, 3:16 PM CDT	Severe Thunderstorm Watch	SPC	Columbia, Lafayette, Miller, Union	8 hr
Jul 20, 8:26 PM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Kay, Mayes, Nowata, Osage and 6 more	94 min
Jul 20, 8:43 PM CDT	Tornado Watch	SPC	Adair, Alfalfa, Cherokee, Craig, Creek, Delaware and 19 more	7 hr
Jul 20, 10:03 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Blaine, Canadian, Custer, Dewey and 8 more	57 min
Jul 20, 10:27 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Blaine, Canadian, Cleveland, Custer, Dewey and 15 more	8 hr
Jul 21, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Beckham, Caddo, Carter, Comanche, Cotton, Garvin and 11 more	5 hr
Jul 21, 1:34 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Garfield and 20 more	86 min
Jul 21, 3:21 AM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 25 more	114 min
Jul 21, 5:40 AM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Comanche, Cotton, Garvin, Grady and 12 more	35 min
Jul 21, 5:59 PM CDT	Mesoscale Discussion	SPC	Cimarron	91 min
Jul 20, 8:05 PM CDT	Mesoscale Discussion	SPC	Austin, Bee, Brazos, Burleson, Colorado, DeWitt and 15 more	55 min
Jul 21, 6:24 PM CDT	Mesoscale Discussion	SPC	Camp, Gregg, Harrison, Marion, Panola, Rusk and 3 more	96 min

Nearby

Mesoscale Discussions in Texas, 2009 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.