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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1051 AM MDT Wed Oct 21 2020

COZ030>051-221700-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1051 AM MDT Wed Oct 21 2020

...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON FOR THE HIGH
MOUNTAIN VALLEYS AND FRONT RANGE FOOTHILLS, CONTINUING THROUGH THE
NIGHT ALONG THE FOOTHILLS...

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

A warm and dry day today will mix with gusty winds in the higher
elevations to bring another day of very high fire danger. Wind
gusts of 30 to 40 mph will be common this afternoon, and the
higher mountains will have gusts to 50 mph. The winds will
diminish in the mountain valleys this evening, but will remain
windy with low humidity in the foothills overnight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Warm, breezy, and dry conditions will persist over the mountains
and mountain valleys through Saturday, bringing continuation of
elevated fire weather concerns. Meanwhile, a cold front will
bring colder temperatures and higher relative humidities to the
Front Range and eastern plains Thursday and continues into
Saturday.

A storm system is still on track to move across the Central
Rockies this weekend. This system will bring a good chance for
snow Saturday night and Sunday along with cold temperatures.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$



Air Quality Alert

COC013-123-001-031-059-035-005-014-069-222200-
Boulder-Weld-Adams-Denver-Jefferson-Douglas-Arapahoe-
Broomfield-Larimer-
410 PM MDT Wed Oct 21 2020

...ACTION DAY FOR PARTICULATES FROM 400 PM WEDNESDAY UNTIL 400 PM
THURSDAY...

The Colorado Department of Public Health and Environment has
issued the following...

WHAT...Action Day for Particulates.

WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties

WHEN...400 PM Wednesday October 21 to 400 PM Thursday October 22

IMPACTS...Action Day for Particulates is now in effect for the
seven-county Denver-Boulder metropolitan area. Requests to limit
driving of non- ZEV vehicles (i.e., gas or diesel) are now in
effect until at least 4 PM Thursday, October 22, 2020.  Moderate
to heavy smoke can be expected on Wednesday and Thursday for
locations in Larimer and Boulder counties near the Cameron Peak,
Calwood, and Lefthand Canyon wildfires, along with locations below
the fires in the Front Range Urban Corridor from Ft. Collins
southward to Longmont, Boulder, and potentially Denver. Smoke
levels will likely fluctuate for these areas throughout the day on
Wednesday and Thursday, but the threat for periods of heavy smoke
is expected to continue. For areas included in this advisory that
are not expected to exceed the Unhealthy for Sensitive Groups
(USG) air quality designation, we request that activities, such as
driving non-ZEV vehicles (i.e., gas or diesel), be reduced to
lessen the impacts on neighboring air quality. Additional air
pollution in this region may directly worsen air quality or
contribute to precursors which may also adversely affect air
quality.  For Colorado air quality conditions, forecasts and
advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx

HEALTH INFORMATION...If smoke is thick or becomes thick in your
neighborhood you may want to remain indoors. This is especially
true for those with heart disease, respiratory illnesses, the very
young, and the elderly. Consider limiting outdoor activity when
moderate to heavy smoke is present. Consider relocating
temporarily if smoke is present indoors and is making you ill. If
visibility is less than 5 miles in smoke in your neighborhood,
smoke has reached levels that are unhealthy.

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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