Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Flood Advisory
Area(s): Hot Springs, WY
Effective: 2026-07-18 @ 3:52 pm -> 2026-07-18 @ 6:45 pm
Onset: 2026-07-18 @ 3:52 pm -> 2026-07-18 @ 6:45 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-18 @ 3:52 pm
Headline: Flood Advisory issued July 18 at 2:52PM MDT until July 18 at 5:45PM MDT by NWS Riverton WY
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...West Central Hot Springs County in central Wyoming...

* WHEN...Until 545 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos.

* ADDITIONAL DETAILS...
- At 251 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause small stream flooding. Between 1
and 1.5 inches of rain have fallen.
- This includes the following streams and drainages...
North Fork Owl Creek. Additional rainfall amounts of 1 to 1.5
inches are expected over the area. This additional rain will
result in minor flooding.
- Some locations that will experience flooding include...
Mainly rural areas of West Central Hot Springs County.
- http://www.weather.gov/safety/flood

Alert: Flood Advisory
Area(s): Hot Springs, WY; Park, WY
Effective: 2026-07-18 @ 3:10 pm -> 2026-07-18 @ 6:15 pm
Onset: 2026-07-18 @ 3:10 pm -> 2026-07-18 @ 6:15 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-07-18 @ 3:10 pm
Headline: Flood Advisory issued July 18 at 2:10PM MDT until July 18 at 5:15PM MDT by NWS Riverton WY
Description: * WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...West Central Hot Springs County in central Wyoming...
Extreme Southern Park County in central Wyoming...
This includes the South Fork of Wood River, Gooseberry Creek, and
the headwaters of Grass Creek.

* WHEN...Until 515 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos.

* ADDITIONAL DETAILS...
- At 208 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.8 and 1 inch of rain has
fallen. This is falling on already saturated grounds from
previous days.
- Additional rainfall amounts of 1 to 1.5 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Mainly rural areas of West Central Hot Springs and Southern Park
Counties.
- http://www.weather.gov/safety/flood

Alert: Heat Advisory
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; 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; Weston County Plains; Newcastle; Northeastern Crook
Effective: 2026-07-18 @ 2:04 pm -> 2026-07-19 @ 7:00 am
Onset: 2026-07-18 @ 2:04 pm -> 2026-07-19 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Rapid City SD on 2026-07-18 @ 2:04 pm
Headline: Heat Advisory issued July 18 at 1:04PM MDT until July 19 at 9:00PM MDT by NWS Rapid City SD
Description: * WHAT...Heat index values up to 105.

* WHERE...Portions of northwestern, south central, and southwestern
South Dakota and northeast Wyoming.

* WHEN...Until 9 PM MDT /10 PM CDT/ Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.

Alert: Heat Advisory
Area(s): Box Butte; Scotts Bluff; Banner; Morrill; South Sioux; Converse County Lower Elevations; Niobrara County; Goshen County
Effective: 2026-07-18 @ 11:17 am -> 2026-07-19 @ 7:00 am
Onset: 2026-07-19 @ 1:00 pm -> 2026-07-20 @ 7:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-07-18 @ 11:17 am
Headline: Heat Advisory issued July 18 at 10:17AM MDT until July 20 at 6:00PM MDT by NWS Cheyenne WY
Description: * WHAT...Afternoon temperatures in the upper 90's to low 100's with
overnight lows in the mid 60's to low 70's.

* WHERE...In Nebraska, Banner County, Box Butte County, Morrill
County, Scotts Bluff County, and Southern Sioux County. In
Wyoming, Converse County Lower Elevations, Niobrara County, and
Goshen County.

* WHEN...From noon Sunday to 6 PM MDT Monday.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.

Alert: Flood Watch
Area(s): Absaroka Mountains; Cody Foothills
Effective: 2026-07-18 @ 3:37 am -> 2026-07-18 @ 11:00 pm
Onset: 2026-07-18 @ 1:00 pm -> 2026-07-18 @ 11:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Riverton WY on 2026-07-18 @ 3:37 am
Headline: Flood Watch issued July 18 at 2:37AM MDT until July 18 at 10:00PM MDT by NWS Riverton WY
Description: * WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...A portion of northwest Wyoming, including the following
areas, Absaroka Mountains and Cody Foothills.

* WHEN...From noon MDT today through this evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS...
- Heavy rain from slow moving thunderstorms may bring local
flooding this afternoon and evening.
- http://www.weather.gov/safety/flood