National Weather Service

Watches, Warnings & Advisories
NWS Homepage

2 products issued by NWS for:
Share |

Air Quality Alert

410 PM MDT Mon Jul 22 2019

...OZONE ACTION DAY ALERT 7/22/2019 4:00:00 PM MDT UNTIL 7/23/2019
4:00:00 PM MDT...

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

WHAT...Ozone Action Day Alert.

WHERE...El Paso, Douglas, Jefferson, Denver, Arapahoe, Adams,
Broomfield, Boulder, Larimer, Weld Counties.

WHEN...7/22/2019 4:00:00 PM MDT to 7/23/2019 4:00:00 PM MDT

ADDITIONAL DETAILS...An Action Day for Ozone 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 Tuesday, July
23, 2019.  Afternoon thunderstorms will limit ozone concentrations
on Monday. On Tuesday however, hot temperatures and light winds
will allow ozone concentrations to reach levels that are Unhealthy
for Sensitive Groups in western portions of the northern Colorado
Front Range and in the foothills. This includes locations in the
Denver Metro area, Boulder, Longmont, and 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
1059 AM MDT Mon Jul 22 2019

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-
1059 AM MDT Mon Jul 22 2019

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Expect another day of showers and thunderstorms forming over the
mountains and foothills in the early afternoon, spreading over the
adjacent plains through the afternoon hours, but likely
dissipating before the far eastern plains. The stronger storms
will be capable of producing very heavy rain with one to two
inches of rain in a short period of time. This may cause flooding
of low lying areas. In addition to the heavy rain, hail up to one
inch in diameter and damaging winds will be possible with the
strongest storms. Storms should weaken this evening and be
dissipated by midnight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Scattered afternoon and evening thunderstorms are expected each
afternoon and evening this week. The stronger storms, especially
along the Front Range, Palmer Divide and adjacent eastern plains
will be capable of producing locally heavy rainfall and small hail
each day.


Spotter activation is not expected to be needed 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
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE