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3 products issued by NWS for: Fort Collins CO

Air Quality Alert

410 PM MDT Wed Jun 7 2023


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 Wednesday June 07 to 400 PM Thursday June 08

IMPACTS...Ozone Action Day Alert 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. Thursday, June 8, 2023.  Delayed storm development and spotty
coverage is expected to allow ozone concentrations to reach the
Unhealthy for Sensitive Groups category in western portions of the
Front Range on Wednesday and Thursday. 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...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
1052 AM MDT Thu Jun 8 2023

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-
1052 AM MDT Thu Jun 8 2023

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Showers and storms will, once again, form in the afternoon and
evening today but coverage will be lower than previous days. Some
storms could produce heavy rainfall and there is a limited threat of
flash flooding in the recent burn areas. The Cameron Peak burn area
will see the highest chance of flash flooding while the East
Troublesome and Williams Fork burn areas will see a low chance of
any flooding. Across the rest of the area, some of the storms could
produce small hail and gusty winds. There is a small chance that
storms over and near the Palmer Divide could be strong enough to
produce hail near one inch in diameter with damaging winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There will be little change to the wet and coolish pattern in the
long term period. Scattered showers and storms will develop each
day; with the higher terrain usually seeing the bulk of the
storms. The primary concern will be flooding, particularly flash
flooding in the recent burn areas. The days with the highest
chance of burn area flash flooding will be Saturday and Sunday.
There will also be a marginal threat of severe storms on Friday
and Monday afternoons across portions of the eastern plains. Gusty
winds, hail, and lightning will also be threats.


Spotter activation will not be needed today or tonight. However,
any significant rainfall and flooding reports will be


Flood Advisory

Flood Advisory
National Weather Service Denver CO
827 PM MDT Wed Jun 7 2023

...The National Weather Service in Denver has issued a Flood
Advisory for the following rivers in Colorado...

  North Fork Big Thompson River at Drake affecting Larimer County.


If you encounter a flooded roadway, turn around and find an
alternative route.

Caution is urged when walking near riverbanks.

Additional information is available at


827 PM MDT Wed Jun 7 2023


* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...North Fork Big Thompson River at Drake.

* WHEN...From this evening to early Monday morning.

* IMPACTS...At 4.5 feet, Water overflows banks in the lowest areas
  adjacent to the river.


    - At 7:30 PM MDT Wednesday the stage was 4.8 feet.

    - Forecast...The river is expected to rise to a crest of 5.0
    feet tomorrow morning.

    - Action stage is 4.5 feet.

    - Flood stage is 5.5 feet.


LAT...LON 4047 10546 4048 10540 4044 10531 4042 10537
      4044 10541 4043 10545



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