textproduct: Cheyenne

KEY MESSAGES

- Red Flag Warnings are in effect until 8 PM MDT Thursday for gusty winds and low humidity for much of Southeast Wyoming.

- Hot temperatures return today through Sunday with slightly cooler temperatures Monday through next Wednesday.

SHORT TERM /THROUGH TONIGHT/

Issued at 1221 AM MDT Thu Aug 6 2026

Lets start off the short term period looking at the upper levels. Currently we are sitting under west northwest flow as ridging builds across the Desert Southwest, pushing into our region as we sit in the northeast quadrant. This set-up plays a huge role in what to expect in the short term with regards to elevated to critical fire weather concerns. This orientation will not be favorable for a monsoonal push of moisture, so we will remain dry through this forecast period. We will see minimum RH values tank over the next day to as low as 5 percent, with many locations around 10 percent across the CWA. Winds are not what we look for, but with how dry it has been and how dry it will be, Red Flag Warnings for much of southeast Wyoming that were issued yesterday are still valid for Thursday. The Nebraska Panhandle will be left out as of now since they will stay below critical thresholds that we look for with regards to issuing Red Flag Warnings.

In other news, said ridge will aid in bringing back hot southerly flow into our region. This is depicted nicely with 700MB temperatures surging back into the 16-20 degrees C range by Thursday afternoon. This will be reflected nicely at the surface with highs topping out in the 90s to near 100, hottest across the Nebraska Panhandle. Slightly cooler west of the I-25 corridor where highs will top out in the upper 80s to near 90. Taking a quick look at winds, not much to write about there either as no high wind events in the foreseeable future.

LONG TERM /FRIDAY THROUGH WEDNESDAY/

Issued at 212 PM MDT Wed Aug 5 2026

With this synoptic setup, we will see much of the same weather over the forecast period. Friday starts us off with the ridge over our area. This will bring warm temperatures and dry air to the CWA. The 700mb temperatures are in the mid teens to lower 20C, supporting warm temperatures across the CWA, before temperatures return to the mid teens on Tuesday, cooling the area down some. Fire weather will be a concern through this forecast period with dry air, gusty winds, and little to no chances of precipitation through Monday. Daytime RH values go down to the single digits to teens each day with little overnight recovery. Fire weather has the potential to become critical with any increases in winds. Monday afternoon through Tuesday, a trough starts building over the PNW, potentially drawing in some moisture and giving some relief to fire weather conditions as it nears closer to our area.

AVIATION /12Z TAFS THROUGH 12Z FRIDAY/

Issued at 520 AM MDT Thu Aug 6 2026

VFR conditions will prevail across all terminals for the duration of this TAF period. There is a low probability of low CIGs and VIS to impact KSNY and KAIA this morning, between now and 15Z, as a bank of low clouds and fog/mist lies just to the east of the aforementioned sites. Kept it out of the TAFs at this time due to low confidence if these variables will impact those sites. Partly due to the time, the sun is about to rise and therefore put an end to chances of low CIGs and VIS along with winds ramping up.

CYS WATCHES/WARNINGS/ADVISORIES

WY...Air Quality Alert until 11 AM MDT this morning for WYZ101>119. Red Flag Warning from 11 AM this morning to 8 PM MDT this evening for WYZ417>420-428>430. Red Flag Warning until 8 PM MDT this evening for WYZ421>427. NE...None.