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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
919 AM MDT Mon Aug 2 2021

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-
919 AM MDT Mon Aug 2 2021


This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Moisture is expected to increase across the north central
mountains this afternoon and evening. This will result in an
elevated threat of flash flooding in the East Troublesome, Cameron
Peak and Williams Fork burn through this evening. The threat will
be limited in the Calwood burn area. It will be warmer with areas
of smoke expected to continue over the northeast plains, but no
thunderstorms are expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Heavy rainfall is possible across the high terrain again Tuesday
due to persistent moisture over the region, and an elevated threat
of burn area flash flooding is anticipated. A warming and drying
trend is expected to begin by mid week, but with chances for
afternoon and evening showers and storms over the higher terrain
through the end of the week.


Spotter activation will not be needed today or tonight, but
rainfall reports would be greatly appreciated.


Air Quality Alert

410 PM MDT Mon Aug 2 2021


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

WHAT...Action Day for Multiple Pollutants.

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

WHEN...400 PM Monday August 02 to 400 PM Tuesday August 03

IMPACTS...Action Day for Multiple Pollutants is now in effect for
the Front Range Urban Corridor. Requests to limit driving of non-
ZEV vehicles (i.e., gas or diesel) are now in effect until at
least 4 p.m. Tuesday, August 3, 2021.  Ozone concentrations are
expected to be in the Unhealthy for Sensitive Groups to Unhealthy
range, and concentrations of fine particulates are expected to
reach the Unhealthy for Sensitive Groups category on Monday and
Tuesday. The highest concentrations of ozone are most likely in
the western portions of the Denver Metro area, and elevated levels
of both pollutants are possible throughout the Colorado Front
Range Region, from Fort Collins and Greeley southward through
Colorado Springs.For areas included in this advisory that are not
expected to reach 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...Greater likelihood of respiratory symptoms
and breathing difficulty in active children and adults and people
with lung disease, such as asthma; possible respiratory effects in
general population. Active children and adults, and people with
lung disease, such as asthma, should avoid prolonged or heavy
indoor and outdoor exertion; everyone else, especially children,
should reduce prolonged or heavy indoor and outdoor exertion.


U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page last modified: May 16, 2007
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