textproduct: Cheyenne

KEY MESSAGES

- Red Flag Warning has been extended for eastern Wyoming and all of western Nebraska through Friday evening, with critical or near-critical fire conditions through the work week.

- Cooler than average temperatures expected late in the weekend into early next week with showers and thunderstorms possible.

SHORT TERM /THROUGH FRIDAY NIGHT/

Issued at 250 AM MDT Thu Jun 11 2026

Secondary cold front has recently pushed south into Colorado late last night with some shower activity and embedded thunder across western Nebraska at this hour. Pretty chilly airmass behind this front, with temperatures continuing to lower into low to mid 40s. High temperatures will remain near or slightly below average for this time of the year with afternoon readings in upper 60s to upper 70s under northwest flow aloft, warmest over the lower elevations of western Nebraska. Remaining breezy with winds shifting into the northwest with gusts up to 45 MPH. Other than fire weather concerns, minimal impacts expected through Friday night with dry conditions.

Pretty cold temperatures tonight with clear skies and pretty good radiational cooling for mid June. Areas across the Laramie Valley and the lower elevations of Carbon county may see low temperatures by Friday morning nudging towards freezing, with low to mid 40s possible across the eastern plains. Can't rule out some frost across the more sheltered valleys. Otherwise, temperatures are expected to rebound Friday as low to midlevel flow backs into the west and 700mb temperatures climb above 10c to 14c. High temperatures Friday afternoon will generally be in the 80s for most of the region, with a few locations below 4500 feet near 90 degrees.

LONG TERM /SATURDAY THROUGH WEDNESDAY/

Issued at 333 PM MDT Wed Jun 10 2026

Heading into the long term period, most of the CWA east of the I-25 corridor will have elevated fire weather concerns with dry conditions continuing along with temperatures soaring into the mid 80s to mid 90s, warmest across the Nebraska Panhandle. This coincides with minimum RH values tanking into the single digits by Friday afternoon. A silver lining, winds don't look to be all that gusty, generally less than 25 mph. So, this may help in limiting any fire spread for fires that are ongoing or if a new one begins. Then, some changes are in store for over the weekend.

By Saturday evening, a 500MB shortwave takes a nose dive south, out of Montana, into our CWA. This will bring a surface cold front that slides across the region late Saturday into Sunday, increasing the chances of precipitation along with bringing in a surge of cooler air. Therefore, temperatures on Sunday will only top out in the mid 60s for many locations across the CWA, a tad cooler than what we've been having as of late. This will bring an end to the fire weather threat for the time being. The aforementioned shortwave rides on the western peripheral of a deep trough that sets up over most of the CONUS just to our east while a weak ridge tries to build to our southwest. This keeps us under northwesterly flow which will bring us a continuation of cooler temperatures through mid-week. Winds, as of now, may pose minimal to no threat as the signal is weak within most guidance. At the tail end of this forecast period, models are hinting to a return of drier conditions along with a spike in temperatures, stay tuned...

AVIATION /18Z TAFS THROUGH 18Z FRIDAY/

Issued at 1143 AM MDT Thu Jun 11 2026

KRWL just came back and was down due to Data comms issues. But for now the ammendment not sked remark will stay until next TAF cycle. The winds will stay gusty until about 00z then will gradually die down. Around 06z the winds will go light and possibly variable for a few hours before switching to a southerly direction by 08z for the Panhandle. Around 15z the winds will also switch to the West before starting to gusts again.

CYS WATCHES/WARNINGS/ADVISORIES

WY...Red Flag Warning until 8 PM MDT Friday for WYZ417-418-430>433. NE...Red Flag Warning until 8 PM MDT Friday for NEZ434>437.