textproduct: Cheyenne

KEY MESSAGES

- Dry conditions and above average temperatures will continue into the beginning of next week.

- Fire weather concerns will increase on Monday, mainly west of Interstate 25 and the Laramie Range.

SHORT TERM /THROUGH SUNDAY NIGHT/

Issued at 229 AM MDT Sat Oct 3 2026

A pleasant weekend is expected with sunny skies and mild temperatures. A bubble of high pressure continues to sit over the Four Corners region, leading to the benign weather. Subsidence under the ridge will ensure limited cloud cover with no chance of precipitation on both Saturday and Sunday. A shortwave passing to the northeast of the forecast area on Saturday will lead to breezy north winds throughout the day. Northerly winds will cause a subtle drop in high temperatures compared to Friday. Highs will be about 5 degrees cooler, but will remain about 10 degrees above average for early October. Winds will ease Saturday night, with clear and calm conditions. This will allow for effective radiational cooling, leading to more seasonable overnight lows. Sunday will be a few degrees warmer compared to Saturday. Winds will shift out of the south and west, ushering warmer air in to the forecast area. High temperatures on Sunday will be in the 70s and 80s, making for a picturesque fall day for outdoor activities.

LONG TERM /MONDAY THROUGH FRIDAY/

Issued at 1249 PM MDT Fri Oct 2 2026

Dry and significantly warmer than average conditions expected for the entirety of the long term period. The work week will start with very warm conditions as a ridge of high pressure controls the Western US, with highs in the widespread upper 70's west of the Laramie Range, and mid to upper 80's to nearing 90 to the east. Probabilistic guidance is in unanimous agreement on this heat, with only a 3 degree spread noted in highs for the Cheyenne area specifically. These highs will also be almost 20 degrees above normal for this time of year, and record temperatures will be on the line for several locations across the forecast area on both sides of the mountains. Finally, this will be the driest day of the week with RH values bottoming out in the mid to low teens. This alongside breezy daytime winds could return us to critical fire weather conditions, and will need to be monitored over the weekend for any necessary products.

The ridge will flatten out and shift a bit more southward through the rest of the week which will help slightly alleviate these temperatures, but expect highs remaining in the 70's and 80's through Friday. A slight increase in moisture could also be possible, but slight is the keyword here, and we will still see elevated fire weather danger thanks to RH values still dropping into the upper teens to low 20% range. Our only indication of any hint of moisture occurs on Tuesday during this slight pattern shift, with a single time period of a slight shower chance at the top of the mountains, so dry it's impressive. Unfortunately models are also in unanimous agreement on this pattern, and the only variances noted in ensemble clusters is how far east or west the ridge over our area shifts by the end of the forecast period. While this could slightly increase or decrease our highs by the end of the week, the message remains the same no matter what - hot and dry through the first full week of October.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

Issued at 528 AM MDT Sat Oct 3 2026

VFR conditions will prevail for the TAF period. Breezy conditions are expected at all terminals this afternoon behind a cold front. Winds will also shift out of the north behind the front sometime during the mid to late morning hours.

CYS WATCHES/WARNINGS/ADVISORIES

WY...None. NE...None.