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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
432 AM MDT Thu Oct 22 2020

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
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
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
432 AM MDT Thu Oct 22 2020

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Warm, windy, and dry conditions will persist over Grand, Summit,
and Park counties today. This will keep the fire danger elevated.
A cold front will slide south across eastern Colorado today. This
will usher colder air, low clouds, and northeast winds. In
addition to this, light snow and freezing drizzle will be possible
along the east slopes of the Front Range mountains, foothills,
and near by plains late this afternoon through tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

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

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 into Monday along with much colder temperatures.


Spotter activation will not be needed today and tonight.


Air Quality Alert

910 AM MDT Thu Oct 22 2020


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.  Areas of
very heavy smoke have been observed in southern parts of Larimer
County, including Estes Park. CDPHE strongly recommends residents
in this area to remain indoors as much as possible with the
windows closed Thursday morning. Improving air quality is expected
for this area during the late morning and early afternoon hours.
Elsewhere, areas of moderate to heavy smoke can be expected
Thursday for locations in Larimer and Boulder counties near the
Cameron Peak, Calwood, and Lefthand Canyon wildfires. Locations
below the wildfires along the Front Range Urban Corridor from Ft.
Collins southward to Longmont, Boulder, and possibly Denver could
also receive heavy smoke at times Thursday morning, but a general
improvement in air quality is expected by Thursday afternoon.
CDPHE requests 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:

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
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Silver Spring, MD 20910
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