Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
115 PM MDT Tue Apr 21 2026
COZ215-220615-
/O.CON.KBOU.FW.W.0037.260422T1600Z-260423T0600Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-
115 PM MDT Tue Apr 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
MIDNIGHT MDT WEDNESDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY
FOR THE FRONT RANGE FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH
PARK...
* AFFECTED AREA...Fire Weather Zone 215.
* TIMING...From 10 AM Wednesday to midnight MDT Wednesday night.
* WINDS...West 20 to 30 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...5 to 8 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
115 PM MDT Tue Apr 21 2026
COZ214-216-238>251-220615-
/O.NEW.KBOU.FW.A.0028.260423T1600Z-260424T0200Z/
/O.CON.KBOU.FW.W.0037.260422T1600Z-260423T0600Z/
Central and Southeast Park County-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
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
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
115 PM MDT Tue Apr 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
MIDNIGHT MDT WEDNESDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY
FOR THE FRONT RANGE FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH
PARK...
...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHERN
FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH PARK...
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Thursday morning through Thursday evening.
* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 240,
241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251.
* TIMING...For the Red Flag Warning, from 10 AM Wednesday to
midnight MDT Wednesday night. For the Fire Weather Watch, from
Thursday morning through Thursday evening.
* WINDS...For the Red Flag Warning, west 20 to 30 mph with gusts
up to 45 mph. For the Fire Weather Watch, northwest winds
gusting up to 50 mph.
* RELATIVE HUMIDITY...For the Red Flag Warning, 5 to 8 percent.
For the Fire Weather Watch, as low as 10 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
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.
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Rapid City SD
1248 PM MDT Tue Apr 21 2026
...RED FLAG WARNING IN EFFECT LATE WEDNESDAY MORNING THROUGH
EARLY EVENING ACROSS NORTHEASTERN WYOMING AND WESTERN SOUTH
DAKOTA...
.Hot, dry, and windy conditions will support widespread critical
fire weather conditions Wednesday, mainly in the afternoon and
evening. Temperatures tomorrow will range from the 80s to mid 90s
with minimum humidities dropping to as low as 10%. Meanwhile,
southwesterly winds will increase through the morning as a cold
front approaches the region. Sustained winds will be at 20 to 30
mph with gusts of 35 to 45 mph. Scattered thunderstorms are
possible across western to central South Dakota Wednesday
afternoon and evening. These storms may contain cloud-to-ground
lightning and erratic winds with gusts in excess of 50 mph while
producing very little precip. This could lead to fire initiation.
Conditions will improve Wednesday evening as temperatures fall,
humidity rises, and a cold front quickly crosses the area.
SDZ319>327-329>335-WYZ314>318-221200-
/O.UPG.KUNR.FW.A.0009.260422T1800Z-260423T0100Z/
/O.NEW.KUNR.FW.W.0019.260422T1600Z-260423T0200Z/
Northern Black Hills-Central Black Hills-Southern Black Hills-
Fall River County Area-Northern Foot Hills-Eastern Foot Hills-
Custer County Plains-Pine Ridge Area-Butte County Area-
West Central Plains-Ziebach County-Haakon County Area-
Badlands Area-Bennett County Area-Mellette and Todd Counties-
Tripp County-Northern Campbell-Southern Campbell-
Crook County Plains-Weston County Plains-Wyoming Black Hills-
1248 PM MDT Tue Apr 21 2026 /148 PM CDT Tue Apr 21 2026/
...RED FLAG WARNING IN EFFECT FROM 10 AM MDT /11 AM CDT/ TO 8 PM
MDT /9 PM CDT/ WEDNESDAY FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONES 314, 315, 316, 317, 318, 319,
320, 321, 322, 323, 324, 325, 326, 327, 329, 330, 331, 332, 333,
334, AND 335...
The National Weather Service in Rapid City has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from 10 AM MDT /11 AM CDT/ to 8 PM MDT /9 PM CDT/
Wednesday. The Fire Weather Watch is no longer in effect.
* AFFECTED AREA...Fire Weather Zones 314 Northern Campbell, 315
Southern Campbell, 316 Crook County Plains, 317 Weston County
Plains, 318 Wyoming Black Hills, 319 Northern Black Hills, 320
Central Black Hills, 321 Southern Black Hills, 322 Fall River
County Area, 323 Northern Foot Hills, 324 Eastern Foot Hills,
325 Custer County Plains, 326 Pine Ridge Area, 327 Butte
County Area, 329 West Central Plains, 330 Ziebach County, 331
Haakon County Area, 332 Badlands Area, 333 Bennett County
Area, 334 Mellette and Todd Counties and 335 Tripp County.
* WINDS...Southwest 20 to 30 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...As low as 10 percent.
* IMPACTS...The combination of gusty winds and low relative
humidity would produce critical fire weather conditions.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service North Platte NE
136 PM CDT Tue Apr 21 2026
NEZ204-206-208-210-221245-
/O.UPG.KLBF.FW.A.0014.260422T1800Z-260423T0200Z/
/O.NEW.KLBF.FW.W.0026.260422T1600Z-260423T0200Z/
Eastern Panhandle/Crescent Lake NWR-
Sandhills/Valentine NWR/Nebraska National Forest-
Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National
Forest-Frenchman Basin-
136 PM CDT Tue Apr 21 2026 /1236 PM MDT Tue Apr 21 2026/
...RED FLAG WARNING IN EFFECT FROM 11 AM CDT /10 AM MDT/ TO 9 PM
CDT /8 PM MDT/ WEDNESDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY, AND
DRY LIGHTNING FOR FIRE WEATHER ZONES 204, 206, 208, AND 210...
The National Weather Service in North Platte has issued a Red
Flag Warning, which is in effect from 11 AM CDT /10 AM MDT/ to
9 PM CDT /8 PM MDT/ Wednesday. The Fire Weather Watch is no
longer in effect.
* AFFECTED AREA...All of western and north central Nebraska.
* TIMING...Wednesday morning into the evening.
* WINDS...South 20 to 30 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* TEMPERATURES...Upper 80s to lower 90s.
* LIGHTNING...Dry lightning possible late Wednesday afternoon
and evening, especially west of Highway 83.
* IMPACTS...Any fire starts may rapidly grow and spread. Gusty,
erratic winds will be possible with thunderstorms.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Grand Junction CO
1139 AM MDT Tue Apr 21 2026
Wind gusts up to 45 to 55 mph and critical fuels will overcome
marginal relative humidity values on Wednesday, leading to
widespread critical fire weather conditions in Colorado zones
200 and 202.
COZ200-202-221200-
/O.CON.KGJT.FW.W.0008.260422T1600Z-260423T0300Z/
Little Snake Forecast Area-White River Forecast Area-
1139 AM MDT Tue Apr 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 9 PM MDT
WEDNESDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS
FOR FIRE WEATHER ZONES 200 AND 202...
* AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little
Snake Forecast Area and Fire Weather Zone 202 White River
Forecast Area.
* TIMING...From 10 AM to 9 PM MDT Wednesday.
* WINDS...Southwest 25 to 35 mph with gusts up to 55 mph.
* RELATIVE HUMIDITY...14 to 19 percent.
* IMPACTS...Elevated fire danger is expected. Fires will catch
and spread rapidly and erratically.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
1234 AM MDT Tue Apr 21 2026
...MULTI DAY RED FLAG WARNING IS IN EFFECT UNTIL WEDNESDAY EVENING...
NEZ434>437-WYZ417-418-430>433-220000-
/O.CON.KCYS.FW.W.0018.260421T1700Z-260423T0200Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Laramie Foothills and High Plains-Laramie East High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
1234 AM MDT Tue Apr 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
8 PM MDT WEDNESDAY FOR VERY LOW HUMIDITY AND GUSTY WINDS FOR FIRE
WEATHER ZONES 417, 418, 430, 431, 432, 433, 434, 435, 436, AND
437...
* AFFECTED AREA...Fire weather zones 417, 418, 430, 431, 432, 433,
434, 435, 436, and 437.
* WIND... Southerly winds 10 to 15 mph gusting up to 35 mph on
Tuesday. Southwest winds with gusts between 35 and 50 mph on
Wednesday.
* HUMIDITY...5 to 12 percent.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
Wind Advisory
URGENT - WEATHER MESSAGE
National Weather Service Grand Junction CO
1138 AM MDT Tue Apr 21 2026
COZ001-002-006>008-011-020>022-UTZ022-024-027-029-221200-
/O.CON.KGJT.WI.Y.0008.260422T1500Z-260423T0300Z/
Lower Yampa River Basin-Central Yampa River Basin-Grand Valley-
Debeque to Silt Corridor-Central Colorado River Basin-Central
Gunnison and Uncompahgre River Basin-Paradox Valley/Lower Dolores
River-Four Corners/Upper Dolores River-Animas River Basin-
Southeast Utah-Eastern Uinta Basin-Arches/Grand Flat-
Canyonlands/Natural Bridges-
Including the cities of Rangely, Dinosaur, Dinosaur National
Monument, Craig, Hayden, Meeker, Grand Junction, Fruita, Palisade,
Colorado National Monument, Whitewater, Collbran, De Beque, New
Castle, Mesa, Parachute, Rifle, Silt, Edwards, Eagle, Gypsum,
Glenwood Springs, Carbondale, Basalt, Montrose, Olathe, Delta,
Hotchkiss, Paonia, Gateway, Nucla, Norwood, Cortez, Dove Creek,
Mancos, Towaoc, Mesa Verde National Park, Durango, Bayfield,
Ignacio, Blanding, Bluff, Mexican Hat, Vernal, Jensen, Ballard, Fort
Duchesne, Randlett, Moab, Arches National Park, Castle Valley,
Thompson Springs, Dead Horse Point State Park, Canyonlands National
Park, Natural Bridges, and Fry Canyon
1138 AM MDT Tue Apr 21 2026
...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 9 PM MDT WEDNESDAY...
* WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph
expected.
* WHERE...Portions of northwest, southwest, and west central
Colorado and east central, northeast, and southeast Utah.
* WHEN...From 9 AM to 9 PM MDT Wednesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
&&
$$
BW
High Wind Watch
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
NEZ003-019>021-054-055-096-221215-
/O.CON.KCYS.HW.A.0031.260423T1200Z-260424T0000Z/
Box Butte County-Scotts Bluff County-Banner County-Morrill County-
Kimball County-Cheyenne County-Southern Sioux County-
Including the cities of Hemingford, Angora, Sidney, Kimball,
Bridgeport, Agate, Gering, Brownson, Redington, Harrisburg,
Scottsbluff, Bayard, and Alliance
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY AFTERNOON...
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph possible.
* WHERE...Banner County, Box Butte County, Cheyenne County, Kimball
County, Morrill County, Scotts Bluff County, and Southern Sioux
County.
* WHEN...From Thursday morning through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
MM
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ101-221215-
/O.CON.KCYS.HW.A.0031.260423T0000Z-260423T2100Z/
Converse County Lower Elevations-
Including the cities of Douglas, Bill, Glenrock, and Deer Creek
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH
THURSDAY AFTERNOON...
* WHAT...West winds 25 to 35 mph with gusts up to 65 mph possible.
* WHERE...Converse County Lower Elevations.
* WHEN...From Wednesday evening through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ104-109-111-113-221215-
/O.CON.KCYS.HW.A.0031.260422T1500Z-260423T2100Z/
Ferris/Seminoe/Shirley Mountains-Central Carbon County-Southwest
Carbon County-Upper North Platte River Basin-
Including the cities of Encampment, Baggs, Seminoe Dam, Rawlins,
and Saratoga
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY AFTERNOON...
* WHAT...Southwest winds 25 to 35 mph with gusts up to 60 mph
possible.
* WHERE...Central Carbon County, Ferris/Seminoe/Shirley Mountains,
Southwest Carbon County, and Upper North Platte River Basin.
* WHEN...From Wednesday morning through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ106-221215-
/O.CON.KCYS.HW.A.0031.260422T2100Z-260424T0000Z/
Central Laramie Range and Southwest Platte County-
Including the cities of Bordeaux
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY AFTERNOON...
* WHAT...West winds 35 to 50 mph with gusts up to 80 mph possible.
* WHERE...Bordeaux area along Interstate 25 between Chugwater and
Wheatland.
* WHEN...From Wednesday afternoon through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ107-108-115-119-221215-
/O.EXB.KCYS.HW.A.0031.260423T0000Z-260424T0000Z/
East Platte County-Goshen County-Laramie Valley-East Laramie
County-
Including the cities of Pine Bluffs, Torrington, Bosler,
Guernsey, Wheatland, and Laramie
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
AFTERNOON...
* WHAT...West winds 35 to 45 mph with gusts up to 70 mph possible.
* WHERE...East Laramie County, East Platte County, Goshen County,
and Laramie Valley.
* WHEN...From Wednesday evening through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ110-221215-
/O.CON.KCYS.HW.A.0031.260422T1500Z-260424T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY AFTERNOON...
* WHAT...West winds 35 to 45 mph with gusts up to 65 mph possible.
* WHERE...North Snowy Range Foothills including Arlington and Elk
Mountain along Interstate 80.
* WHEN...From Wednesday morning through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ116-117-221215-
/O.CON.KCYS.HW.A.0031.260422T2100Z-260424T0000Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Buford, Federal, Pumpkin Vine, Whitaker,
Vedauwoo, and Horse Creek
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY AFTERNOON...
* WHAT...West winds 35 to 50 mph with gusts up to 80 mph possible.
* WHERE...South Laramie Range and Foothills including the Interstate
80 Summit between Cheyenne and Laramie.
* WHEN...From Wednesday afternoon through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
201 PM MDT Tue Apr 21 2026
WYZ118-221215-
/O.CON.KCYS.HW.A.0031.260422T2100Z-260424T0000Z/
Central Laramie County-
Including the cities of Cheyenne
201 PM MDT Tue Apr 21 2026
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY AFTERNOON...
* WHAT...West winds 25 to 35 mph with gusts up to 60 mph possible.
* WHERE...Central Laramie County.
* WHEN...From Wednesday afternoon through Thursday afternoon.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A High Wind Watch means there is the potential for a hazardous high
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58
MPH or stronger may occur. Continue to monitor the latest forecasts.
&&
$$
Fire Weather Watch
URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
115 PM MDT Tue Apr 21 2026
COZ214-216-238>251-220615-
/O.NEW.KBOU.FW.A.0028.260423T1600Z-260424T0200Z/
/O.CON.KBOU.FW.W.0037.260422T1600Z-260423T0600Z/
Central and Southeast Park County-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
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
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
115 PM MDT Tue Apr 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
MIDNIGHT MDT WEDNESDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY
FOR THE FRONT RANGE FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH
PARK...
...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHERN
FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH PARK...
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Thursday morning through Thursday evening.
* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 240,
241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251.
* TIMING...For the Red Flag Warning, from 10 AM Wednesday to
midnight MDT Wednesday night. For the Fire Weather Watch, from
Thursday morning through Thursday evening.
* WINDS...For the Red Flag Warning, west 20 to 30 mph with gusts
up to 45 mph. For the Fire Weather Watch, northwest winds
gusting up to 50 mph.
* RELATIVE HUMIDITY...For the Red Flag Warning, 5 to 8 percent.
For the Fire Weather Watch, as low as 10 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
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.
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
1203 PM MDT Tue Apr 21 2026
WYZ275-276-280>283-285-287-289-300-221300-
/O.CON.KRIW.FW.A.0005.260422T1500Z-260423T0200Z/
North Bighorn Basin/Worland BLM-Cody Foothills-
Natrona County/Casper BLM-Johnson County/Casper BLM-
South Bighorn Basin/Worland BLM-
Upper Wind River Basin/Wind River Basin-South Bighorn Mountains-
Owl Creek Mountains-Granite/Green/Ferris/Rattlesnake Mountains-
Casper Mountain-
1203 PM MDT Tue Apr 21 2026
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH WEDNESDAY EVENING...
* AFFECTED AREA:
In Central WY Fire Zones...280...283...285...289...300.
In North Central WY Fire Zones...275...276...281...282...287.
* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
In Southwest WY...Sweetwater.
* IMPACTS: Low Humidities and Strong Gusty Winds could cause
erratic fire behavior.
* WIND: Southwest 25 to 35 mph with gusts up to 55 mph.
* HUMIDITY: As low as 10 to 15 percent.
* ADDITIONAL DETAILS: While wind will not be as strong as on
Wednesday, elevated to near critical fire weather conditions will
be seen today across much of the same area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible Red
Flag Warnings.
&&
$$
http://weather.gov/riverton
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service North Platte NE
347 PM CDT Tue Apr 21 2026
NEZ004>010-022>029-035>038-056>059-069>071-094-222100-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
347 PM CDT Tue Apr 21 2026 /247 PM MDT Tue Apr 21 2026/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...Tonight.
There is a low probability for widespread hazardous weather.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Isolated thunderstorms could develop near a dry line across western
Nebraska late Wednesday afternoon. A severe thunderstorm or two will
be possible, though the severe details are still somewhat uncertain.
Additionally, thunderstorms will bring a threat for dry lightning.
A combination of low humidity and gusty winds on both Wednesday and
Thursday may bring a return of near critical or critical fire
weather conditions both days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Riverton WY
440 AM MDT Tue Apr 21 2026
WYZ001>020-022>030-221300-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
440 AM MDT Tue Apr 21 2026
...Fire Weather Watch in effect for locations east of the Continental
Divide on Wednesday...
...Winter Weather Advisory in effect for the western mountains
Wednesday afternoon through Thursday evening...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Elevated to critical fire weather conditions are expected for most
of the area this afternoon.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...Strong wind and low humidity ahead of a cold front will
lead to widespread critical fire weather conditions.
Wednesday through Friday...An incoming system will bring cooler
temperatures, rain, and mountain snow to the area. Accumulating
mountain snow will lead to travel impacts over passes.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
408 AM MDT Tue Apr 21 2026
SDZ001-002-012>014-024>032-041>044-046-047-049-072>078-WYZ054>060-
221300-
Harding-Northern Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foothills-Rapid City-
Southern Foothills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Western Fall River-
Northern Oglala Lakota-Northern Jackson-Bennett-Mellette-Todd-
Tripp-Sturgis/Piedmont Foothills-Southern Meade Co Plains-
Hermosa Foothills-Eastern Fall River-Southern Oglala Lakota-
Southern Jackson-Southern Perkins-Northern Campbell-
Southern Campbell-Western Crook-Wyoming Black Hills-
Weston County Plains-Newcastle-Northeastern Crook-
408 AM MDT Tue Apr 21 2026 /508 AM CDT Tue Apr 21 2026/
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
Very warm and dry conditions will support widespread elevated to
near critical fire weather conditions today.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Hot, dry, and windy weather may support widespread critical fire
weather conditions Wednesday. Thunderstorms may develop across
western South Dakota Wednesday afternoon. A few storms may become
strong to severe and be capable of wind gusts of over 50 mph.
Strong northwest winds are expected on Thursday with gusts of up
to 60 mph across northwestern SD.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today.
&&
Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
448 PM MDT Mon Apr 20 2026
NEZ002-003-019>021-054-055-095-096-WYZ101>119-272300-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
448 PM MDT Mon Apr 20 2026
This text Hazardous Weather Outlook product has been
discontinued as of April 13th 2026. Information formerly contained
within this product can now be found online in graphical form at
https://www.weather.gov/erh/ghwo?wfo=cys and via the NWS Cheyenne
Weather Story and/or social media outlets.
This reminder about the sunset of the text Hazardous Weather Outlook
will remain in place until April 30th 2026.
$$
