Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Freeze Warning
Area(s): Wind River Basin; Lander Foothills
Effective: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Onset: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-04-17 @ 2:02 pm
Headline: Freeze Warning issued April 17 at 1:02PM MDT until April 18 at 9:00AM MDT by NWS Riverton WY
Description: * WHAT...Sub-freezing overnight temperatures in the upper teens to
low 20s expected.

* WHERE...Lander Foothills and Wind River Basin.

* WHEN...Until 9 AM MDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing such as sprinkler systems.

* ADDITIONAL DETAILS...The coldest temperatures are expected to
occur for a period of time before sunrise on Saturday morning.

Alert: Freeze Warning
Area(s): North Bighorn Basin; Southeast Bighorn Basin
Effective: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Onset: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-04-17 @ 2:02 pm
Headline: Freeze Warning issued April 17 at 1:02PM MDT until April 18 at 9:00AM MDT by NWS Riverton WY
Description: * WHAT...Sub-freezing overnight temperatures in the upper teens to
low 20s expected.

* WHERE...Southeast Bighorn Basin and North Bighorn Basin.

* WHEN...Until 9 AM MDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing such as sprinkler systems.

* ADDITIONAL DETAILS...The coldest temperatures are expected to
occur for a period of time before sunrise on Saturday morning.

Alert: Freeze Warning
Area(s): Cody Foothills; Southwest Bighorn Basin
Effective: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Onset: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-04-17 @ 2:02 pm
Headline: Freeze Warning issued April 17 at 1:02PM MDT until April 18 at 9:00AM MDT by NWS Riverton WY
Description: * WHAT...Sub-freezing overnight temperatures in the upper teens to
low 20s expected.

* WHERE...Southwest Bighorn Basin and Cody Foothills.

* WHEN...Until 9 AM MDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing such as sprinkler systems.

* ADDITIONAL DETAILS...The coldest temperatures are expected to
occur for a period of time before sunrise on Saturday morning.

Alert: Freeze Warning
Area(s): Northeast Johnson County; Southeast Johnson County
Effective: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Onset: 2026-04-17 @ 7:00 pm -> 2026-04-18 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-04-17 @ 2:02 pm
Headline: Freeze Warning issued April 17 at 1:02PM MDT until April 18 at 9:00AM MDT by NWS Riverton WY
Description: * WHAT...Sub-freezing overnight temperatures in the upper teens to
low 20s expected.

* WHERE...Northeast Johnson County and Southeast Johnson County.

* WHEN...From 6 PM this evening to 9 AM MDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing such as sprinkler systems.

* ADDITIONAL DETAILS...The coldest temperatures are expected to
occur for a period of time before sunrise on Saturday morning.

Alert: Freeze Warning
Area(s): Green Mountains and Rattlesnake Range; Natrona County Lower Elevations
Effective: 2026-04-17 @ 2:02 pm -> 2026-04-18 @ 10:00 am
Onset: 2026-04-17 @ 7:00 pm -> 2026-04-18 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-04-17 @ 2:02 pm
Headline: Freeze Warning issued April 17 at 1:02PM MDT until April 18 at 9:00AM MDT by NWS Riverton WY
Description: * WHAT...Sub-freezing overnight temperatures in the mid to upper
teens expected.

* WHERE...Green Mountains and Rattlesnake Range and Natrona County
Lower Elevations.

* WHEN...From 6 PM this evening to 9 AM MDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing such as sprinkler systems.

* ADDITIONAL DETAILS...The coldest temperatures are expected to
occur for a period of time before sunrise on Saturday morning.

Alert: Red Flag Warning
Area(s): Pine Ridge/Nebraska National Forest; Box Butte/South Sioux/Niobrara River; Lower North Platte River Basin/Scottsbluff National Monument; Lodgepole Creek/Southern Nebraska Panhandle; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin
Effective: 2026-04-17 @ 1:48 pm -> 2026-04-18 @ 9:00 pm
Onset: 2026-04-18 @ 12:00 pm -> 2026-04-18 @ 7:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-04-17 @ 1:48 pm
Headline: Red Flag Warning issued April 17 at 12:48PM MDT until April 18 at 8:00PM MDT by NWS Cheyenne WY
Description: The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 11 AM to 8 PM MDT Saturday. a
Fire Weather Watch has also been issued. This Fire Weather Watch
is in effect from Sunday morning through Monday evening.

* AFFECTED AREA...Fire weather zones 430 through 437.

* WIND...For the Red Flag Warning: West to northwest gusts between
25 to 35 mph. For the Fire Weather Watch: West to northwest
gusts to 20 mph Sunday, becoming light and variable overnight,
then west to northwest gusts between 25 to 30 mph Monday.

* HUMIDITY...For the Red Flag Warning: 12 to 16 percent. For the
Fire Weather Watch: 8 to 12 percent.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Fire Weather Watch
Area(s): Pine Ridge/Nebraska National Forest; Box Butte/South Sioux/Niobrara River; Lower North Platte River Basin/Scottsbluff National Monument; Lodgepole Creek/Southern Nebraska Panhandle; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin
Effective: 2026-04-17 @ 1:48 pm -> 2026-04-20 @ 9:00 pm
Onset: 2026-04-19 @ 12:00 pm -> 2026-04-18 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Cheyenne WY on 2026-04-17 @ 1:48 pm
Headline: Fire Weather Watch issued April 17 at 12:48PM MDT until April 20 at 8:00PM MDT by NWS Cheyenne WY
Description: The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 11 AM to 8 PM MDT Saturday. a
Fire Weather Watch has also been issued. This Fire Weather Watch
is in effect from Sunday morning through Monday evening.

* AFFECTED AREA...Fire weather zones 430 through 437.

* WIND...For the Red Flag Warning: West to northwest gusts between
25 to 35 mph. For the Fire Weather Watch: West to northwest
gusts to 20 mph Sunday, becoming light and variable overnight,
then west to northwest gusts between 25 to 30 mph Monday.

* HUMIDITY...For the Red Flag Warning: 12 to 16 percent. For the
Fire Weather Watch: 8 to 12 percent.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Fire Weather Watch
Area(s): Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; Middle North Platte River Basin/Niobrara and Converse High Plains
Effective: 2026-04-17 @ 1:48 pm -> 2026-04-20 @ 9:00 pm
Onset: 2026-04-19 @ 12:00 pm -> 2026-04-18 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Cheyenne WY on 2026-04-17 @ 1:48 pm
Headline: Fire Weather Watch issued April 17 at 12:48PM MDT until April 20 at 8:00PM MDT by NWS Cheyenne WY
Description: The National Weather Service in Cheyenne has issued a Fire
Weather Watch, which is in effect from Sunday morning through
Monday evening.

* AFFECTED AREA...Fire weather zones 417 and 418.

* WIND...West to northwest gusts between 20 to 30 mph.

* HUMIDITY...9 to 13 percent.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Winter Weather Advisory
Area(s): North Laramie Range
Effective: 2026-04-17 @ 12:35 pm -> 2026-04-17 @ 4:00 pm
Onset: 2026-04-17 @ 12:35 pm -> 2026-04-17 @ 4:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-04-17 @ 12:35 pm
Headline: Winter Weather Advisory issued April 17 at 11:35AM MDT until April 17 at 3:00PM MDT by NWS Cheyenne WY
Description: * WHAT...Snow. Additional snow accumulations up to one inch. Winds
gusting as high as 35 mph.

* WHERE...North Laramie Range.

* WHEN...Until 3 PM MDT this afternoon.

* IMPACTS...Outdoor recreation could become dangerous to those
caught unprepared for hazardous winter conditions. Hunters,
hikers, and snowmobilers may become disoriented and lost due to
low visibility in falling and blowing snow.

Alert: Winter Weather Advisory
Area(s): Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County; Upper North Platte River Basin
Effective: 2026-04-17 @ 12:35 pm -> 2026-04-17 @ 4:00 pm
Onset: 2026-04-17 @ 12:35 pm -> 2026-04-17 @ 4:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-04-17 @ 12:35 pm
Headline: Winter Weather Advisory issued April 17 at 11:35AM MDT until April 17 at 3:00PM MDT by NWS Cheyenne WY
Description: * WHAT...Snow. Additional snow accumulations up to one inch.

* WHERE...Portions of Carbon and Albany county in south central
Wyoming.

* WHEN...Until 3 PM MDT this afternoon.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

* ADDITIONAL DETAILS...Rapidly dropping temperatures may lead to a
flash freeze and icy conditions Thursday night into Friday morning.