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Air Quality Alert

410 PM MDT Thu May 28 2020


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

WHAT...Ozone Action Day Alert.

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

WHEN...400 PM Thursday May 28 to 400 PM Friday May 29

IMPACTS...Ozone Action Day Alert is now in effect for the seven-
county Denver- Boulder metropolitan area. Requests to limit
driving are now in effect until at least 4 PM Friday, May 29,
2020.  Hot and sunny weather, along with light winds, will lead to
concentrations of ozone that are Unhealthy for Sensitive Groups on
Friday. The highest concentrations of ozone are most likely for
locations in the western portions of the Denver Metro area, and
northward along the Front Range and lower foothills through
Boulder, Longmont, and western Fort Collins. 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, be reduced to lessen the impacts on
neighboring air quality. Additional air pollution in this region
may directly diminish air quality or contribute to precursors
which may also adversely affect air quality. For Colorado air
quality conditions, forecasts and advisories, visit:

HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.


Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1028 AM MDT Thu May 28 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-
1028 AM MDT Thu May 28 2020

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms will develop over the
mountains and foothills by early afternoon. This activity may then
spread into the plains late this afternoon and evening. The
stronger storms will produce brief heavy rain, small hail and
wind gusts to 40 mph.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There will be a chance of afternoon and evening showers and
thunderstorms over the mountains and foothills each day, with
lesser chances out on the plains. The storms are expected to be
most numerous on Saturday, when there is a threat of heavy rain.
A few strong storms are possible each day, but the threat of
severe thunderstorms is low through the extended.


Spotter activation is not anticipated today or tonight.


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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