Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
108 AM MDT Tue Aug 11 2026
WYZ417>430-120300-
/O.CON.KCYS.FW.W.0038.260811T1800Z-260812T0300Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
North Laramie Range and Adjacent High Plains-
North Laramie Valley/Shirley Basin-
Ferris/Seminoe/Shirley Mountains-Central and West Carbon-
Southwest Carbon County-Sierra Madre Range/Medicine Bow NF-
Upper North Platte River Basin-Snowy Range/Medicine Bow NF-
North Snowy Range Foothills-Southern Laramie Valley-
Southern Laramie Range-Laramie Foothills and High Plains-
108 AM MDT Tue Aug 11 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR LOW RH, GUSTY WINDS, AND DRY LIGHTNING FOR FIRE
WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426,
427, 428, 429, and 430...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from noon to 9 PM MDT Tuesday.
* AFFECTED AREA...Fire weather zones 417 through 430.
* WIND...West to northwest at 15 to 20 mph with gusts up to 35
mph, turning northerly into the evening hours.
* HUMIDITY...Between 8 and 16 percent.
* ADDITIONAL DETAILS...Isolated high-based showers will have
the potential to produce gusty and erratic winds along with a
few strikes of lightning without much, if any, rainfall
during the afternoon and evening hours.
* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
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.
&&
$$
Air Quality Alert
COC013-059-001-035-014-031-069-123-005-120600-
Boulder-Jefferson-Adams-Douglas-Broomfield-Denver-Larimer-
Weld-Arapahoe-
410 PM MDT Tue Aug 11 2026
...OZONE ACTION DAY ALERT FROM 400 PM TUESDAY UNTIL 1200 AM
WEDNESDAY...
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Ozone Action Day Alert.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Tuesday August 11 to 1200 AM Wednesday August 12
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. On Tuesday, hot and stagnant weather will
allow ozone to reach the Unhealthy for Sensitive Groups level. On
Wednesday, unsettled weather and scattered showers will limit
ozone development, and moderate concentrations are expected. For
Colorado air quality conditions, forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until midnight, Tuesday
night, August 11, 2026. Colorado is also addressing ozone
pollution through state policies. For more information about
health impacts and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health
HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Goodland KS
800 PM MDT Tue Aug 11 2026
COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-130200-
Yuma-Kit Carson-Cheyenne CO-Cheyenne KS-Rawlins-Decatur-Norton-
Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-Greeley-Wichita-
Dundy-Hitchcock-Red Willow-
800 PM MDT Tue Aug 11 2026 /900 PM CDT Tue Aug 11 2026/
This hazardous weather outlook is for extreme southwest Nebraska...
northwest Kansas and east central Colorado.
.DAY ONE...TONIGHT...
A thunderstorm or two is possible through the evening hours. Strong
wind gusts will be the primary hazard should storms form.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY...
Near daily chances for at least isolated strong to severe storms
through the majority of the upcoming week. At this time, Wednesday
afternoon and evening will have the best chance for severe
thunderstorms to develop.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to report significant weather conditions.
$$
Hazardous Weather Outlook
National Weather Service North Platte NE
303 PM CDT Tue Aug 11 2026
NEZ004>010-022>029-035>038-056>059-069>071-094-122015-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
303 PM CDT Tue Aug 11 2026 /203 PM MDT Tue Aug 11 2026/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...This afternoon and tonight.
Scattered thunderstorms, a few severe, will be possible late this
afternoon and evening across northern Nebraska. Large hail and
damaging winds will be the main concerns.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Additional chances for scattered strong to severe thunderstorms are
expected Wednesday afternoon and evening across much of the area.
The threat will then turn to the threat for locally heavy rainfall
Wednesday night through Saturday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed.
$$
Hazardous Weather Outlook
National Weather Service Pueblo CO
1055 AM MDT Tue Aug 11 2026
COZ058>089-093>099-121700-
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-
1055 AM MDT Tue Aug 11 2026
This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.
.DAY ONE...Today and Tonight
Hot temperatures will continue today across the entire region,
with temperatures in the 90s to lower 100s over the plains and
in the mid 80s to lower 90s over the mountain valleys. Otherwise,
scattered showers and thunderstorms will develop over the higher
terrain this afternoon, which will spread east across the high
mountain valleys and adjacent plains through the late afternoon
and evening hours. Storms will be mainly high based, producing
gusty outflow winds up to 50 mph, as well as cloud to ground
lightning. Brief heavy rain and small hail could accompany the
strongest storms.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Hot temperatures continue on Wednesday, especially across the
southeast plains, as upper level ridging across the central
Rockies continues to drift south and east through the end of
the week. This will lead to a continued increase in available
"monsoon" moisture and an increase in daily thunderstorm coverage
through the end of the week, with Wednesday being the first day
for flooding chances over the Aspen Acres and 24 burn scars.
As daily thunderstorm coverage continues to increase, the threat
for flooding and flash flooding over burn scars, urban areas, and
areas with saturated soils throughout the rest of the forecast
period.
.SPOTTER INFORMATION STATEMENT...
Weather conditions that meet reporting criteria for spotters will
be possible over portions of the region.
$$
23/SKELLY
