textproduct: Cheyenne

KEY MESSAGES

- Critical fire weather conditions due to gusty winds and low humidity continue through Friday evening across the High Plains.

- Temporary relief from the critical fire weather conditions will come this weekend with cooler temperatures and slight chances for a few showers and thunderstorms.

- Fire weather concerns will escalate once again by the middle of next week.

SHORT TERM /THROUGH SATURDAY NIGHT/

Issued at 255 AM MDT Fri Jun 12 2026

Pretty chilly temperatures early this morning with clear skies and good radiational cooling for mid June. Widespread 40s and low 40s have been observed so far, with a few locations in the upper 30s (Saratoga and vicinity). Expect these temperatures to lower a few more degrees before sunrise. Temperatures are forecast to rebound today with lighter winds and midlevel winds backing into the west during the day. Pleasant day to end the work-week with highs in the upper 70s to upper 80s, warmest below elevations of 4500 feet. A few locations across western Nebraska could see the low 90s this afternoon under mostly sunny skies. Other than fire weather concerns and active fires over portions of the area, little to no weather impacts expected today. Not as cool tonight with low temperatures in the middle 40s to middle 50s by early Saturday morning.

Models show the next Canadian cold front diving south into Wyoming late this evening and early Saturday morning. FROPA should be pretty quick, with the cold front moving into northern Colorado by sunrise early Saturday morning. Much cooler Saturday with highs struggling to reach 70 to 75 degrees across most of the area, warmest over the Interstate 80 corridor. Further north, some low clouds are possible with highs in the 60s over near Douglas, Lusk, and Chadron. Probability of precipitation has lowered quite a bit behind this front compared to a few days ago. This is due to a pretty shallow moist layer near the shallow frontal inversion along with little or no instability at all. Kept a slight chance of showers, mainly near the mountains and up north along the US highway 20. Another chilly night Saturday night with lows in the upper 30s to middle 40s.

LONG TERM /SUNDAY THROUGH THURSDAY/

Issued at 330 PM MDT Thu Jun 11 2026

The weather for Sunday can be a little tricky. A weak shortwave trough will be dropping through the Intermountain West as the Parent low sits and spins over the Great Lakes region of the US. There doesn't appear to be very much moisture associated with this shortwave and the models are depicting very little if any forcing to really help us overcome the stable dry air. Confidence is pretty low for any measurable rain so low Pop's (25% or lower) generally over the entire CWA with the exception of Laramie county that has 35% pops or less where the forcing seemed a little bit stronger. This shortwave may also develop some precipitation chances early Monday morning but those chances deteriorate by the afternoon on Monday. Tuesday through Thursday will have a ridge slowly push into the Intermountain West and start advecting warm dry air into the region.

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 550 AM MDT Fri Jun 12 2026

Flow aloft will become westerly today as another strong cold front moves southward into Wyoming starting late this afternoon and this evening. Gusty westerly winds will gradually shift into the north and northeast tonight.

HAZARDS/WEATHER TRENDS: VFR conditions will continue over the next 24 hours with mostly clear skies. It will be less windy today, but gusts of 30 to 35 knots are still possible late this morning and this afternoon for KLAR and KRWL. Some smoke possible near KCDR and KAIA due to the South Fork fire, but confidence is low enough to keep out of the TAFs.

CYS WATCHES/WARNINGS/ADVISORIES

WY...Red Flag Warning until 8 PM MDT this evening for WYZ417-418- 430>433.

NE...Red Flag Warning until 8 PM MDT this evening for NEZ434>437.