Gillette, Wyoming 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

187
FXUS63 KUNR 261958
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
158 PM MDT Thu Mar 26 2026

.KEY MESSAGES...

- Light rain/snow showers continue into this evening.

- Warming trend over the weekend with dry conditions, resulting in
  elevated to critical fire weather.


&&

.DISCUSSION...(This Evening Through Thursday)
Issued at 125 PM MDT Thu Mar 26 2026

Current Water Vapor and upper air models show near zonal flow over
the northern and central plains this afternoon. Surface analysis
shows weak frontal boundary running west/east through the CWA.
Radar has some light returns just north of the Black Hills along
the boundary, as well as some upslope precipitation over the Black
Hills. Winds are generally out of the north and light to breezy,
with temperatures in the 30s to low 40s.

Band of precipitation will continue to push south this afternoon
and weaken as it taps into drier air. Some areas have reached
0.1-0.2" QPF this morning, but expecting lighter amounts as it
gets towards I-90. The exception will be over the higher elevation
Black Hills, which could see 0.05-0.1" QPF through this afternoon.
Expect light precipitation will end during the evening hours. A
secondary cold front moves through tonight into Friday morning. No
moisture expected with this boundary. However gusty winds (20-30
mph)may continue through Friday morning.

Attention then turns to the weekend, where a warming trend is
expected, as broad upper ridge builds over the western CONUS.
Temperatures climb back up to 20-30F above normal for Saturday
through Monday. Elevated to critical fire weather may be possible
at times as the warmer temperatures combine with low RH and gusty
winds at times. A Fire Weather Watch has been issued for parts of
southwestern to south-central SD for Saturday, and more headlines
may be necessary for Sunday/Monday.

Forecast confidence wavers further out towards middle of next
week, as long range models differ on the overall synoptic pattern.
ECMWF points towards trough digging into the region and bringing
active weather middle of next week and beyond, while the GFS has
ridging mid-week, and then potential for troughing towards next
weekend.


&&

.AVIATION...(For the 18Z TAFS Through 18Z Friday)
Issued At 1120 AM MDT Thu Mar 26 2026

Overcast conditions with local MVFR/Isold IFR cigs vsbys in light
rain/light snow are expected through 27/02z. Gusty northerly winds
will diminish this evening. Cigs/vsbys will improve to VFR aft
27/04z as drier air moves into the region.

&&

.FIRE WEATHER...
Issued At 125 PM MDT Thu Mar 26 2026

A warming trend over the weekend, coupled with low RH`s and gusty
winds at times will lead to elevated to critical fire weather
conditions. Saturday morning winds will pick up due to a low level
jet passing through, resulting in wind gusts 30 to 45 mph at times
for parts of the western SD plains. RH`s are also expected to dip
into the teens over much of the forecast area for Saturday. A Fire
Weather Watch is in effect for parts of southwestern to south-
central SD for Saturday morning into the evening, where the
stronger winds and low RH`s coincide.

Sunday is expected to have even lower RH`s, however the winds
aren`t quite as bad. Low afternoon RH`s will continue into Monday
as well with stronger winds returning. Moderate to high
confidence more fire weather headlines will be necessary for
Sunday and Monday.


&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Fire Weather Watch from Saturday morning through Saturday
     evening for SDZ325-326-332>335.
WY...None.
&&

$$

DISCUSSION/KEY MESSAGES...Dye
AVIATION...Hintz
FIRE WEATHER...Dye