Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Winter Storm Warning |
| Area(s): | North Laramie Range; Snowy Range |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Storm Warning issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations 10 to 20 inches expected. Winds could gust as high as 30 to 40 mph with periods of blowing and drifting snow, especially above 8500 feet. * WHERE...Snowy Range and North Laramie Range. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Heavy wet snow. Roads, and especially bridges, will likely become slick and hazardous. |
| Alert: | Winter Weather Advisory |
| Area(s): | Converse County Lower Elevations; Shirley Basin; Central Laramie Range and Southwest Platte County; South Laramie Range Foothills |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-18 @ 1:00 am -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations 2 to 5 inches. Winds gusting as high as 35 mph. * WHERE...Converse County Lower Elevations, Shirley Basin, Central Laramie Range and Southwest Platte County, and South Laramie Range Foothills. * WHEN...From midnight tonight to 6 PM MDT Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. |
| Alert: | Winter Storm Warning |
| Area(s): | South Laramie Range |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Storm Warning issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Heavy snow. Total snow accumulations 6 to 10 inches expected with locally higher amounts. Winds could gust as high as 30 to 40 mph with some drifting snow expected. * WHERE...South Laramie Range including the Interstate 80 Summit between Cheyenne and Laramie. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. |
| Alert: | Winter Storm Warning |
| Area(s): | Central Carbon County |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-18 @ 1:00 am -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Storm Warning issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Heavy snow and periods of blowing snow. Total snow accumulations 5 to 10 inches expected with locally higher amounts near the mountains. Winds could gust as high as 45 mph. * WHERE...Central Carbon County. * WHEN...From midnight tonight to 6 PM MDT Monday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. |
| Alert: | Winter Weather Advisory |
| Area(s): | Sierra Madre Range |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-17 @ 11:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Snow and blowing snow expected. Total snow accumulations between 6 and 12 inches, with lower amounts on the western side of the range. Winds gusting as high as 55 mph. * WHERE...Sierra Madre Range. * WHEN...From 10 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. Strong winds could cause tree damage. * ADDITIONAL DETAILS...North to northeast facing slopes and ridges will see the highest accumulations, with accumulations much lower on the western side of the range near Dixon and Baggs. |
| Alert: | Winter Storm Warning |
| Area(s): | Ferris/Seminoe/Shirley Mountains; North Snowy Range Foothills |
| Effective: | 2026-05-17 @ 2:50 am -> 2026-05-17 @ 6:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-17 @ 2:50 am |
| Headline: | Winter Storm Warning issued May 17 at 1:50AM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Heavy snow and periods of drifting snow. Total snow accumulations 6 to 10 inches with higher amounts near the mountains. Winds could gust as high as 35 to 45 mph with periods of blowing and drifting snow. * WHERE...North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80, and Ferris/Seminoe/Shirley Mountains. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Scattered power outages possible due to heavy wet snow on trees and powerlines. |
| Alert: | Winter Weather Advisory |
| Area(s): | South Lincoln County |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 4 inches. Winds gusting as high as 40 mph. * WHERE...South Lincoln County. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Upper Green River Basin |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 45 mph. * WHERE...Upper Green River Basin. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Absaroka Mountains; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighorn Mountains Southeast |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches, with 7 to 12 inches at the highest elevations of the southern Absaroka and southern Bighorn Mountains. Winds gusting as high as 50 mph. * WHERE...Owl Creek and Bridger Mountains, Bighorn Mountains Southeast, Bighorn Mountains West, and Absaroka Mountains. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult, especially over mountain passes such as Powder River Pass. |
| Alert: | Winter Weather Advisory |
| Area(s): | Northeast Johnson County; Southeast Johnson County |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations up to 3 inches. Winds gusting as high as 50 mph. * WHERE...Northeast Johnson County and Southeast Johnson County. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Cody Foothills; Southwest Bighorn Basin |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations up to 3 inches. Winds gusting as high as 50 mph. * WHERE...Southwest Bighorn Basin and Cody Foothills. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult due to a combination of snow and wind. The hazardous conditions could impact the Monday commutes. |
| Alert: | Winter Storm Warning |
| Area(s): | Wind River Mountains East |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Storm Warning issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 9 and 18 inches, with locally higher amounts at the highest elevations. Winds gusting as high as 60 mph. * WHERE...Wind River Mountains East. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning commute, including over South Pass. |
| Alert: | Winter Weather Advisory |
| Area(s): | Rock Springs and Green River; Flaming Gorge |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 50 mph. * WHERE...Flaming Gorge and Rock Springs and Green River. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult, especially along Interstate 80. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Lander Foothills |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 3 and 6 inches, with higher amounts possible near Sinks Canyon Park. * WHERE...Lander Foothills. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Storm Warning |
| Area(s): | East Sweetwater County |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Storm Warning issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 55 mph. * WHERE...East Sweetwater County. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult. The hazardous conditions could impact the Monday morning commute, especially along Interstate 80. |
| Alert: | Winter Storm Warning |
| Area(s): | Natrona County Lower Elevations |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Storm Warning issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 3 and 6 inches. Areas of higher amounts up to to 7 inches between Hiland and Casper. Winds gusting as high as 40 mph. * WHERE...Natrona County Lower Elevations. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Storm Warning |
| Area(s): | Casper Mountain |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Storm Warning issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations between 8 and 16 inches possible. Winds could gust as high as 40 mph. * WHERE...Casper Mountain. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Storm Warning |
| Area(s): | Green Mountains and Rattlesnake Range |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Storm Warning issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations between 6 and 12 inches possible. Winds could gust as high as 50 mph. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Wind River Mountains West |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 50 mph. * WHERE...Wind River Mountains West. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult, especially along South Pass. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Upper Wind River Basin; Wind River Basin |
| Effective: | 2026-05-17 @ 2:46 am -> 2026-05-17 @ 7:15 pm |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-17 @ 2:46 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:46AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 1 and 4 inches, with locally higher amounts are possible around Hudson and Fort Washakie. Winds gusting as high as 45 mph. * WHERE...Upper Wind River Basin and Wind River Basin. * WHEN...From 6 PM this evening to 6 PM MDT Monday. * IMPACTS...Travel could be difficult due to a combination of snow and wind. The hazardous conditions could impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains |
| Effective: | 2026-05-17 @ 2:04 am -> 2026-05-18 @ 2:15 am |
| Onset: | 2026-05-17 @ 7:00 pm -> 2026-05-18 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-05-17 @ 2:04 am |
| Headline: | Winter Weather Advisory issued May 17 at 1:04AM MDT until May 18 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Snow and blowing snow expected. Total snow accumulations between 5 and 10 inches. Winds gusting as high as 45 mph. * WHERE...In Montana, Pryor/Northern Bighorn Mountains. In Wyoming, Northeast Bighorn Mountains. * WHEN...From 6 PM this evening to noon MDT Monday. * IMPACTS...Snow and blowing snow will impact back country recreation and travel along Highway 14 through the Bighorn Mountains. * ADDITIONAL DETAILS...Back country activities will be impacted by difficult winter conditions. |
| Alert: | Winter Weather Advisory |
| Area(s): | Western Uinta Mountains; Southwest Wyoming |
| Effective: | 2026-05-16 @ 11:49 pm -> 2026-05-17 @ 3:00 pm |
| Onset: | 2026-05-17 @ 1:00 pm -> 2026-05-19 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Salt Lake City UT on 2026-05-16 @ 11:49 pm |
| Headline: | Winter Weather Advisory issued May 16 at 10:49PM MDT until May 19 at 12:00AM MDT by NWS Salt Lake City UT |
| Description: |
* WHAT...Snow expected. Total snow accumulations of 6 to 14 inches for the Western Uinta Mountains with locally higher amounts, and 2 to 6 inches for southwest Wyoming with locally in excess of 10 inches closer to the north slopes of the Uintas. * WHERE...In Utah, Western Uinta Mountains. In Wyoming, Southwest Wyoming. * WHEN...From noon Sunday to midnight MDT Monday Night. * IMPACTS...Travel could be difficult at times. Traction law restrictions may be enacted. |