Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 816

May 13, 2009Jefferson County, Oklahoma; 22 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2009, 5:53 PM CDT for Jefferson County, Oklahoma; 22 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: May 13, 2009, 5:53 PM CDT (22:53 UTC)
Expired: May 13, 2009, 7:00 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center

All 23 counties

Jefferson County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Foard County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Palo Pinto County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 33 km from the middle of the area, began a volume at 22:57 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 298May 13, 9:40 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
May 12, 8:16 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Kiowa, Tillman	119 min
May 12, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	Comanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more	3 hr
May 13, 3:21 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 31 more	84 min
May 13, 5:11 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 33 more	6 hr
May 13, 6:30 PM CDT	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Custer, Garfield, Kay and 9 more	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.