Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Freeze Warning |
| Area(s): | Harding; Northern Perkins; Butte; Northern Meade Co Plains; Ziebach; Northern Foothills; Rapid City; Southern Foothills; Custer Co Plains; Pennington Co Plains; Haakon; Western Fall River; Northern Oglala Lakota; Northern Jackson; Bennett; 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; Weston County Plains; Newcastle; Northeastern Crook |
| Effective: | 2026-05-18 @ 9:43 pm -> 2026-05-19 @ 10:00 am |
| Onset: | 2026-05-19 @ 1:00 am -> 2026-05-19 @ 10:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-05-18 @ 9:43 pm |
| Headline: | Freeze Warning issued May 18 at 8:43PM MDT until May 19 at 9:00AM MDT by NWS Rapid City SD |
| Description: |
* WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Portions of northwestern and southwestern South Dakota and northeast Wyoming. * WHEN...From midnight tonight to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Cody Foothills; North Bighorn Basin; Southwest Bighorn Basin; Southeast Bighorn Basin; Northeast Johnson County; Southeast Johnson County |
| Effective: | 2026-05-18 @ 6:57 pm -> 2026-05-19 @ 10:00 am |
| Onset: | 2026-05-18 @ 10:00 pm -> 2026-05-19 @ 10:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-18 @ 6:57 pm |
| Headline: | Freeze Warning issued May 18 at 5:57PM MDT until May 19 at 9:00AM MDT by NWS Riverton WY |
| Description: |
* WHAT...Low temperatures of 24 to 28 degrees. * WHERE...Southwest Bighorn Basin, Northeast Johnson County, Southeast Bighorn Basin, Southeast Johnson County, Cody Foothills, and North Bighorn Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...A clearing sky overnight will allow for temperatures to fall well below seasonal normals. |
| Alert: | Freeze Warning |
| Area(s): | Upper Wind River Basin; Wind River Basin; Lander Foothills; Green Mountains and Rattlesnake Range; Natrona County Lower Elevations |
| Effective: | 2026-05-18 @ 6:57 pm -> 2026-05-19 @ 10:00 am |
| Onset: | 2026-05-18 @ 10:00 pm -> 2026-05-19 @ 10:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-05-18 @ 6:57 pm |
| Headline: | Freeze Warning issued May 18 at 5:57PM MDT until May 19 at 9:00AM MDT by NWS Riverton WY |
| Description: |
* WHAT...Low temperatures of 20 to 24 degrees, with colder temperatures of 15 to 20 degrees possible in snow-covered areas above 6,000 feet. * WHERE...Green Mountains and Rattlesnake Range, Lander Foothills, Natrona County Lower Elevations, Upper Wind River Basin, and Wind River Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Overnight lows could be a few degrees warmer if cloud cover does not clear early Tuesday. Sub-freezing temperatures would still occur. |
| Alert: | Freeze Watch |
| Area(s): | South Laramie Range |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-19 @ 10:00 pm -> 2026-05-20 @ 11:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Watch issued May 18 at 1:00PM MDT until May 20 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 above expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 23 possible. * WHERE...South Laramie Range. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Watch |
| Area(s): | Upper North Platte River Basin |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-19 @ 10:00 pm -> 2026-05-20 @ 11:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Watch issued May 18 at 1:00PM MDT until May 20 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 18 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 20 possible. * WHERE...Upper North Platte River Basin. * WHEN...For the Freeze Warning, from midnight tonight to 10 AM MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Watch |
| Area(s): | Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-19 @ 10:00 pm -> 2026-05-20 @ 11:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Watch issued May 18 at 1:00PM MDT until May 20 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 above expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 18 possible. * WHERE...Central Carbon County, Ferris/Seminoe/Shirley Mountains, North Snowy Range Foothills, Shirley Basin, and Southwest Carbon County. * WHEN...For the Freeze Warning, from 6 PM this evening to noon MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Watch |
| Area(s): | Converse County Lower Elevations |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-20 @ 1:00 am -> 2026-05-20 @ 9:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Watch issued May 18 at 1:00PM MDT until May 20 at 8:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 16 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 23 possible. * WHERE...Converse County Lower Elevations. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Watch |
| Area(s): | Laramie Valley |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-20 @ 1:00 am -> 2026-05-20 @ 9:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Watch issued May 18 at 1:00PM MDT until May 20 at 8:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 17 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 26 possible. * WHERE...Laramie Valley. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 7:00 pm -> 2026-05-19 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 12:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 above expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 18 possible. * WHERE...Central Carbon County, Ferris/Seminoe/Shirley Mountains, North Snowy Range Foothills, Shirley Basin, and Southwest Carbon County. * WHEN...For the Freeze Warning, from 6 PM this evening to noon MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Laramie Valley |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 9:00 pm -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 17 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 26 possible. * WHERE...Laramie Valley. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Converse County Lower Elevations |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 9:00 pm -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 16 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 23 possible. * WHERE...Converse County Lower Elevations. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | South Laramie Range |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 9:00 pm -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 above expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 23 possible. * WHERE...South Laramie Range. * WHEN...For the Freeze Warning, from 8 PM this evening to 10 AM MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Scotts Bluff; North Sioux; South Sioux; Niobrara County; East Platte County; Goshen County |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 9:00 pm -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Sub-freezing temperatures as low as 21 expected. * WHERE...In Nebraska, Northern Sioux County, Scotts Bluff County, and Southern Sioux County. In Wyoming, Niobrara County, East Platte County, and Goshen County. * WHEN...From 8 PM this evening to 10 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Central Laramie Range and Southwest Platte County; South Laramie Range Foothills; Central Laramie County; East Laramie County |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-18 @ 9:00 pm -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Sub-freezing temperatures as low as 20 expected. * WHERE...Central Laramie County, Central Laramie Range and Southwest Platte County, East Laramie County, and South Laramie Range Foothills. * WHEN...From 8 PM this evening to 10 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |
| Alert: | Freeze Warning |
| Area(s): | Upper North Platte River Basin |
| Effective: | 2026-05-18 @ 2:00 pm -> 2026-05-19 @ 7:00 am |
| Onset: | 2026-05-19 @ 1:00 am -> 2026-05-19 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-05-18 @ 2:00 pm |
| Headline: | Freeze Warning issued May 18 at 1:00PM MDT until May 19 at 10:00AM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 18 expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 20 possible. * WHERE...Upper North Platte River Basin. * WHEN...For the Freeze Warning, from midnight tonight to 10 AM MDT Tuesday. For the Freeze Watch, from Tuesday evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |