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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1135 AM MDT Thu Oct 22 2020

COZ030>051-231745-
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-
1135 AM MDT Thu Oct 22 2020

...CRITICAL FIRE WEATHER CONDITIONS THROUGH EARLY THIS EVENING
OVER THE HIGH MOUNTAINS AND HIGH VALLEYS FROM BOULDER COUNTY AND
GRAND COUNTY SOUTH DOWN TO PARK COUNTY...

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

.DAY ONE...Today and Tonight

Warm, windy, and dry conditions will persist over the high
mountains and high valleys today, especially Grand, Summit, and
Park counties today, bringing critical fire weather conditions.
Higher humidity and a switch from west-southwest winds to north
winds will spread south later this afternoon into the evening over
these areas to decrease the fire danger.

A cold front across eastern Colorado today, which brought low
clouds and patchy drizzle, will be strengthened and will deepen
later this afternoon with another push of cold air. The moisture
will deepen enough for areas of light snow and freezing drizzle
along the east slopes of the Front Range mountains, foothills, and
near by plains late this afternoon through tonight.


.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Warm, breezy, and dry conditions will persist over the mountains
and mountain valleys Friday, and then it will get windier
Saturday, with gusts around 40 mph. Fire danger will remain
elevated, even with higher humidity readings Saturday.

Snow and much colder temperatures are expected to spread south
across the area Saturday night through Sunday, and remain into
Monday. Several inches of snow to locally a foot or more will be
possible in the mountains, with a few inches possible in lower
elevations. Get prepared for a sharp change in our weather. Winter
travel conditions can be expected as temperatures will be cold
enough to allow snow to accumulate on roads, creating slick travel
conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$



Air Quality Alert

COC013-123-001-031-059-035-005-014-069-232200-
Boulder-Weld-Adams-Denver-Jefferson-Douglas-Arapahoe-
Broomfield-Larimer-
410 PM MDT Thu Oct 22 2020

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

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 Thursday October 22 to 400 PM Friday October 23

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 Friday, October 23, 2020.  Periods of
very heavy smoke will continue in southern parts of Larimer
County, including Estes Park, Glen Haven, and Drake. CDPHE
strongly recommends residents in these areas to remain indoors as
much as possible with the windows closed during periods of heavy
smoke. Locally heavy smoke will also be possible in parts of
Boulder County in close proximity to the Calwood and Left Hand
Canyon wildfires. Lesser amounts of smoke are expected for
locations below the wildfires along the Front Range Urban Corridor
from Ft. Collins southward to Longmont, Boulder, and Denver,
though brief periods of heavy smoke will remain possible so please
be prepared to limit time outdoors Thursday and Friday. 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:
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
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
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