Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 458

April 12, 20099 counties in Oklahoma; 11 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2009, 5:20 PM CDT for 9 counties in Oklahoma; 11 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Apr 12, 2009, 5:20 PM CDT (22:20 UTC)
Expired: Apr 12, 2009, 6:15 PM CDT
In force: 55 min
Issued by: the Storm Prediction Center

Counties Carter County, OK, Comanche County, OK, Cotton County, OK, Jackson County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Stephens County, OK, Tillman County, OK, Clay County, TX, Collin County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX, Jack County, TX, Montague County, TX, Parker County, TX, Tarrant County, TX, Wichita County, TX, Wise County, TX

The radar

The Altus AFB radar (KFDR), 101 km from the middle of the area, began a volume at 22:20 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 12, 2:24 PM CDT	Mesoscale Discussion	SPC	Cotton, Harmon, Jackson, Tillman	96 min
Apr 11, 7:41 PM CDT	Severe Thunderstorm Watch	SPC	Callahan, Coke, Coleman, Concho, Crockett, Fisher and 14 more	5 hr
Apr 11, 9:09 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 30 more	96 min
Apr 11, 11:44 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Clay, Coleman, Comanche, Concho and 22 more	91 min
Apr 12, 12:39 AM CDT	Severe Thunderstorm Watch	SPC	Bandera, Brown, Callahan, Coke, Coleman, Comanche and 38 more	4 hr
Apr 12, 3:55 AM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bandera, Bastrop, Bell, Bexar and 49 more	95 min
Apr 12, 4:37 AM CDT	Mesoscale Discussion	SPC	Brazoria, Chambers, Fort Bend, Hardin, Harris, Jasper and 8 more	83 min
Apr 12, 7:39 AM CDT	Mesoscale Discussion	SPC	Brazoria, Chambers, Galveston, Hardin, Harris, Jasper and 8 more	66 min
Apr 12, 7:58 AM CDT	Tornado Watch	SPC	Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 9 more	8 hr
Apr 12, 9:19 AM CDT	Mesoscale Discussion	SPC	Nacogdoches, Panola, Sabine, San Augustine, Shelby	56 min
Apr 12, 9:30 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Bowie, Cass, Gregg, Harrison, Marion and 6 more	7 hr
Apr 12, 10:53 AM CDT	Mesoscale Discussion	SPC	Chambers, Galveston, Hardin, Harris, Jefferson, Liberty and 2 more	2 hr
Apr 12, 12:00 PM CDT	Mesoscale Discussion	SPC	Sabine	90 min

Nearby

Mesoscale Discussions in Texas, 2009 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.