Alert archive / Colorado / Mesoscale Discussions in 2009

Mesoscale Discussion 1909

August 18, 200924 counties in Colorado; 11 counties in New Mexico

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2009, 11:41 AM MDT for 24 counties in Colorado; 11 counties in New Mexico. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 18, 2009, 11:41 AM MDT (17:41 UTC)
Expired: Aug 18, 2009, 1:45 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 35 counties

Adams County, CO, Alamosa County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Costilla County, CO, Crowley County, CO, Custer County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Fremont County, CO, Gilpin County, CO, Huerfano County, CO, Jefferson County, CO, Las Animas County, CO, Lincoln County, CO, Morgan County, CO, Otero County, CO, Park County, CO, Pueblo County, CO, Teller County, CO, Colfax County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Mora County, NM, Quay County, NM, San Miguel County, NM, Santa Fe County, NM, Torrance County, NM, Union County, NM

The radar

The Pueblo radar (KPUX), 118 km from the middle of the area, began a volume at 17:44 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 709Aug 18, 12:30 PM MDT

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
Aug 18, 12:29 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Baca, Bent, Crowley, Custer and 17 more	9 hr
Aug 18, 3:46 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Kiowa, Kit Carson, Prowers	59 min
Aug 18, 4:00 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Yuma	7 hr

Nearby

Mesoscale Discussions in Colorado, 2009 Mesoscale Discussions in New Mexico, 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.