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. |