Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 640

April 29, 200913 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2009, 11:54 PM CDT for 13 counties in Oklahoma; 21 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Apr 29, 2009, 11:54 PM CDT (04:54 UTC)
Expired: Apr 30, 2009, 1:30 AM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 34 counties

Beckham County, OK, Carter County, OK, Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Love County, OK, Murray County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Denton County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 56 km from the middle of the area, began a volume at 04:56 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 215Apr 30, 1:15 AM 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 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, 5:13 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Cleveland, Creek, Dewey and 15 more	92 min
Apr 30, 5:26 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Roger Mills	64 min
Apr 29, 7:06 PM CDT	Mesoscale Discussion	SPC	Coke, Concho, Crockett, Edwards, Glasscock, Irion and 13 more	84 min
Apr 30, 1:23 AM CDT	Mesoscale Discussion	SPC	Jim Hogg, Webb, Zapata	97 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.