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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
414 AM MDT Tue Aug 11 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-
414 AM MDT Tue Aug 11 2020

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Temperatures will bounce back into the 90s across the urban
corridor and northeast plains this afternoon. Isolated high based
thunderstorms will be possible along and west of the urban
corridor. The storms may produce brief strong and gusty winds but
little if any rainfall. The fire danger will remain high due to
hot temperatures and persistent dry conditions.

There will be a marginal risk of severe thunderstorms over the
northeast plains this afternoon. The best chance will occur east
of a line extending from New Raymer to Fort Morgan to Limon. One
or two storms there could produce damaging wind gusts to 60 mph
and hail up to quarter size.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Hot and mainly dry weather will keep the fire danger elevated
through the period. The best chance thunderstorms each afternoon
and evening will be over the mountains and over the far eastern
plains, but most areas will remain dry.


Spotter activation will not be needed today and tonight.


Air Quality Alert

910 PM MDT Mon Aug 10 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 Monday August 10 to 400 PM Tuesday August 11

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. Tuesday, August 11, 2020.  Ozone concentrations are expected
to be in the Moderate to Unhealthy for Sensitive Groups range on
Monday and Tuesday. Concentrations of ozone in the Unhealthy for
Sensitive Groups category are most likely for locations within the
Denver Metro area, including the surrounding suburbs and lower
foothills. 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.


U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
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