Watches, Warnings & Advisories

2 products issued by NWS for: Denver CO

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1023 AM MDT Sun Jul 21 2024

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-
1023 AM MDT Sun Jul 21 2024

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms are expected this afternoon
and evening across the region. A few of the stronger storms could
produce small hail, gusty winds, and briefly heavy rainfall. A
limited threat exists for flash flooding over the burn scars.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Scattered late day showers and thunderstorms are expected in the
high country Monday through Thursday with isolated to no storm
coverage over the plains. Chances will increase Friday through
Sunday with likely coverage over the alpine areas and scattered
over the plains.


Spotter activation is not expected, but any reports of large hail
or gusty winds will be appreciated.


Air Quality Alert

410 PM MDT Sun Jul 21 2024


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 Sunday July 21 to 400 PM Monday July 22

IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Request to limit driving gas and diesel-
powered vehicles is now in effect until at least 4 p.m. Monday,
July 22, 2024.  Although showers and thunderstorms will limit
ozone production on Sunday, higher ozone concentrations are
expected on Monday. Ozone concentrations in the Unhealthy for
Sensitive Groups category will be possible throughout the northern
Front Range region, including Denver, Boulder, Ft. Collins, and
surrounding areas. CDPHE requests that activities, such as driving
non-ZEV vehicles (i.e., gas or diesel), be reduced to lessen the
impacts on 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...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.