Air Quality Alert
COC059-013-123-031-001-014-069-035-005-122200-
Jefferson-Boulder-Weld-Denver-Adams-Broomfield-Larimer-
Douglas-Arapahoe-
410 PM MDT Mon May 11 2026
...OZONE ACTION DAY ALERT FROM 400 PM MONDAY UNTIL 400 PM
TUESDAY...
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 May 11 to 400 PM Tuesday May 12
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Concentrations of ozone in the Unhealthy
for Sensitive Groups category are possible on Monday and Tuesday
for locations in the northern Colorado Front Range region,
including the Denver Metro area, Fort Collins, Greeley, and
surrounding areas. For Colorado air quality conditions,
forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce pollution by limiting driving gas
and diesel-powered vehicles until at least 4 PM Tuesday, May 12,
2026. Colorado is also addressing ozone pollution through state
policies. For more information about health impacts and how ozone
pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone-pollution- and-your-health
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 Pueblo CO
106 AM MDT Tue May 12 2026
COZ058>089-093>099-130715-
Western Mosquito Range/East Lake County Above 11000 Feet-
Leadville Vicinity/Lake County Below 11000 Feet-
Eastern Sawatch Mountains Above 11000 Feet-
Western Chaffee County Between 9000 and 11000 Feet-
Central Chaffee County Below 9000 Feet-
Western Mosquito Range/East Chaffee County Above 9000 Feet-
Saguache County West of Continental Divide Below 10000 Feet-
Saguache County East of Continental Divide Below 10000 Feet-
La Garita Mountains Above 10000 Feet-
Upper Rio Grande Valley/Eastern San Juan Mountains Below
10000 Feet-Eastern San Juan Mountains Above 10000 Feet-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet-
Alamosa Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Northwestern Fremont County Above 8500 Feet-
Western/Central Fremont County Below 8500 Feet-
Wet Mountain Valley Below 8500 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Feet-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Feet-
Trinidad Vicinity/Western Las Animas County Below 7500 Feet-
Crowley County-La Junta Vicinity/Otero County-
Eastern Las Animas County-Western Kiowa County-
Eastern Kiowa County-Las Animas Vicinity/Bent County-
Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County-
106 AM MDT Tue May 12 2026
This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.
.DAY ONE...Today and Tonight
Gusty outflow winds of 30-40 mph will be possible under weak
precipitation cores this afternoon, with very little, if any,
rain reaching the ground.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Shower and thunderstorm chances increase Wednesday onward, with the
greatest coverage of precipitation remaining along the mountains.
Some storms may be strong Wednesday afternoon, with wind gusts to
around 50-55 mph possible. In addition, areas of critical fire
weather conditions are likely to develop given the increase in
periods of dry, downsloping winds with the more unsettled pattern,
with the greatest fire weather risk across the eastern plains.
.SPOTTER INFORMATION STATEMENT...
Weather spotters will not be needed today or tonight.
$$
SIMCOE/SIMCOE
Hazardous Weather Outlook
National Weather Service Amarillo TX
1056 PM CDT Mon May 11 2026
OKZ001>003-TXZ001>020-317-121800-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
1056 PM CDT Mon May 11 2026
This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.
.DAY ONE...Tonight and Tuesday.
A low chance of a thunderstorm on Tuesday for portions of the TX
Panhandle.
Will also be watching for some triple digit heat for Palo Duro
Canyon. This could cause heat related impacts if outdoors during
peak heating of the day from late morning into the afternoon
hours.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
A 10 to 15 percent chance of thunderstorms from Wednesday through
the coming weekend. Chance for severe thunderstorms are low at
this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated at this time.
$$
