896
FNUS73 KUNR 111941
FWSUNR

Spot Forecast for Haystack...SD-PRA
National Weather Service Rapid City SD
141 PM MDT Sun May 11 2025

Forecast is based on forecast start time of 1400 MDT on May 11.
If conditions become unrepresentative, contact the National Weather
Service.

...WIND ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING...

DISCUSSION...Hot, dry, and breezy conditions will persist through
the afternoon. An isolated thunderstorm is possible after 1500-1600
hours this afternoon; gusty, erratic winds and lightning will be the
main hazards with any storms. Thunderstorm chances taper off after
2100-2300 hours this evening.

Overnight RH recovery will be poor (~50%) with breezy southerly winds
continuing through the overnight hours.

Unseasonably warm temperatures continue Monday (~91F) with daytime RH
falling to around 12% with breezy southwesterly winds (sustained 20 foot
winds 15 to 20 mph with gusts to 25 to 30 mph).

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Max temperature.....Around 89.
Min humidity........15-18 percent.
Wind (20 ft)........Breezy. South winds around 15 to 25 mph with gusts
                    to around 35 to 40 mph.
CWR.................0 percent.
Mixing height.......11500 to 12000 ft agl.
Transport winds.....Southwest around 40 mph.
Smoke dispersal.....Excellent.

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
Min temperature.....Around 58.
Max humidity........48-52 percent.
Wind (20 ft)........Breezy. South winds 15 to 25 mph with gusts to
                    around 35 mph.
CWR.................0 percent.
Mixing height.......500 to 1000 ft agl.
Transport winds.....South around 35 mph.
Smoke dispersal.....Poor.

.MONDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 91.
Min humidity........12-15 percent.
Wind (20 ft)........Southwest winds around 15 to 20 mph with gusts to
                    around 25 to 30 mph.
CWR.................0 percent.
Mixing height.......13100 to 13600 ft agl.
Transport winds.....Southwest around 30 mph.
Smoke dispersal.....Excellent.

$$
Forecaster...SE
Requested by...IC Smith
Type of request...WILDFIRE
.TAG 2513740.0/UNR
.DELDT 05/11/25
.FormatterVersion 2.0.0
.EMAIL justin.bauer@bia.gov