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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
920 AM MDT Thu Oct 1 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-
920 AM MDT Thu Oct 1 2020

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Dry and mild conditions today with some breezy winds across the
higher elevations by the afternoon. Smoke will continue to impact
the northern mountains and foothills through the morning with
smoke spilling out over the lower elevations after 1 pm that could
be hazardous to sensitive groups. Smoke impacts will continue to
be high through tonight with lows in the upper 30s to lower 40s.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Fire danger will remain elevated due to persistent low humidity
and gusty winds in the afternoons. Minimum humidities will often
be below 20 percent coincident with gusts up to 25 mph. The danger
is most persistent in the northern mountains, foothills, and high
mountain valleys, though it will occasionally spread to the
adjacent plains. Fire conditions are currently expected to be most
widespread on Monday. The area will also be repeatedly impacted
by smoke from the ongoing mountain fires.


Spotter activation will not be needed.


Air Quality Alert

910 AM MDT Thu Oct 1 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 September 30 to 400 PM Thursday October 01

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 1, 2020.  Smoke from
several local wildfires is affecting air quality, resulting in
Fine Particulate concentrations in the Unhealthy for Sensitive
Groups category in locations throughout the Colorado Front Range
region. Daytime mixing of the atmosphere will generally allow
smoke to lift and surface concentrations to decrease, however
periods of moderate to heavy smoke are expected to return during
overnight and early morning hours on Wednesday and Thursday. 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:

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
Page last modified: May 16, 2007
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