Red Flag Warning and Air Quality Alert September 5, 2020

Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
317 AM MDT Sat Sep 5 2020

...EXTENDED PERIOD OF HIGH FIRE DANGER...

.Record or near record heat, very dry conditions, and increasing winds will bring critical fire danger to much of the northern mountains and high valleys of northern Colorado Sunday and Monday. The high fire danger may spread to the northern foothills and across the plains on Sunday as well.

COZ211>213-217-218-052100-
/O.CON.KBOU.FW.W.0024.200906T1800Z-200908T0200Z/
Jackson County Below 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-
317 AM MDT Sat Sep 5 2020

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON SUNDAY TO 8 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS AND HIGH MOUNTAIN VALLEYS...

* Affected Area...Fire Weather Zones 211...212...213...217 and 218.

* Winds...West 10 to 20 mph with gusts up to 35 mph.

* Timing...Sunday noon through early evening Monday.

* Relative Humidity...As low as 8 percent.

* Impacts...Rapid growth of existing fires and new fire starts will be possible due to the gusty winds and very low humidity.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

COC013-123-001-031-059-035-005-014-069-052200-
Boulder-Weld-Adams-Denver-Jefferson-Douglas-Arapahoe-Broomfield-Larimer-
910 AM MDT Sat Sep 5 2020

...OZONE ACTION DAY ALERT FROM 400 PM FRIDAY UNTIL 400 PM SATURDAY...

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 Friday September 04 to 400 PM Saturday September 05

IMPACTS...Ozone Action Day Alert is now in effect for the seven- county Denver- Boulder metropolitan area. Requests to limit driving of non-ZEV vehicles (i.e., gas or diesel) are now in effect until at least 4 PM Saturday, September 5, 2020. Hot and sunny weather with light winds will allow ozone to reach the Unhealthy for Sensitive Groups category on Friday and Saturday. The highest concentrations of ozone are expected for locations in the southern and western portions of the Denver Metro area, from Highlands Ranch northward to Golden.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:
www.colorado.gov/airquality/colorado_summary.aspx

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.