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2 products issued by NWS for: 4 Miles E Denver CO
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Air Quality Alert

COC013-123-001-031-059-035-005-014-069-282200-
Boulder-Weld-Adams-Denver-Jefferson-Douglas-Arapahoe-
Broomfield-Larimer-
410 PM MDT Sun Sep 27 2020

...ACTION DAY FOR PARTICULATES FROM 400 PM SUNDAY UNTIL 400 PM
MONDAY...

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 Sunday September 27 to 400 PM Monday September 28

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 Monday, September 28, 2020.  Though
conditions have improved drastically in many areas, wildfire smoke
from several fires in northern Colorado and southern Wyoming is
expected to continue to increase fine particulate concentrations
at times in the Front Range region. The greatest impacts from this
smoke are expected to remain in the northern Colorado Front Range
and adjacent lower foothills, including locations in the Denver
Metro area, Ft. Collins, and Greeley. Due to the nature of
wildfire behavior and smoke production and transport,
concentrations of fine particulates may vary greatly at times
throughout the Front Range region.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.

$$



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
957 AM MDT Sun Sep 27 2020

COZ030>051-281600-
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-
957 AM MDT Sun Sep 27 2020

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

.DAY ONE...Today and Tonight

Much cooler temperatures can be expected today in the wake of
a strong cold front that moved across the area this morning.
Isolated to scattered light rain showers can be expected as well,
with the best chance over the northeast plains. Wind gusts up to
45 mph are possible across the mountains and foothills this
afternoon. North to northeast winds 15 to 30 mph will persist over
the urban corridor and northeast plains, with the strongest gusts
expected east of Interstate 25. Areas of smoke from the fires will
also occur, mainly west of the I-25 corridor into the foothills.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There will be increased fire weather concerns across the plains
both Monday and Tuesday due to gusty northwesterly wind and low
humidity. Gusts of 20 to 35 mph and humidity of 12 to 20 percent
will occur. At this time, criteria does not look to be reached,
but it will be close.

Otherwise, no hazardous weather is expected through the week as
Colorado stays under a dry northwesterly flow aloft.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$




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