Watches, Warnings & Advisories

2 products issued by NWS for: Boulder CO

Air Quality Alert

410 PM MDT Tue May 28 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 Tuesday May 28 to 1200 AM Wednesday May 29

IMPACTS...Ozone Action Day Alert is now in effect for the seven-
county Denver- Boulder metropolitan area. Request to limit driving
gas and diesel- powered vehicles is now in effect until at least 4
PM Wednesday, May 29, 2024.  Ozone concentrations are expected to
reach the Unhealthy For Sensitive Groups level on Tuesday. Western
and southern portions of the Denver Metro Area, from Arvada
southward to Chatfield State Park, are likely to experience the
highest Ozone.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:

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
1010 AM MDT Tue May 28 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-
1010 AM MDT Tue May 28 2024

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Scattered thunderstorms and showers are favored to develop late
afternoon mainly along the southern foothills, Palmer Divide, and
Lincoln county through tonight. These storms may produce small hail,
and wind gusts up to 40 mph.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Afternoon and evening thunderstorms are expected Wednesday, some
of which may be severe with mostly a hail and wind threat for the
rural plains. There will be a lesser severe threat but continued
isolated to scattered afternoon showers and thunderstorms
Thursday into Friday, with a gradually drier pattern thereafter.


Spotter activation will not be needed today or tonight.