390
FNUS75 KBYZ 292219
FWSBYZ
SPOT FORECAST FOR KEYSTONE...SHERIDAN COUNTY
NATIONAL WEATHER SERVICE BILLINGS MT
419 PM MDT SUN MAR 29 2026
FORECAST IS BASED ON FORECAST START TIME OF 1600 MDT ON MARCH 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
HIGH CLOUDS WILL CONTINUE OVERNIGHT TONIGHT WITH MODEST RH
RECOVERIES. TOMORROW DURING THE MORNING HOURS MID LEVEL CLOUDS
BUILD IN WITH 10 MPH WINDS OUT OF THE SOUTHWEST. WIND MAY BRIEFLY
SHIFT TO WESTERLY MIDDAY BEFORE A COLD FRONT MOVES THROUGH LATE
AFTERNOON / EARLY EVENING RAPIDLY INCREASING WINDS OUT OF THE NW
WITH OCCASIONAL GUSTS UP TO 40 MPH. RH VALUES WILL BE VERY LOW WITH
THE AFTERNOON MINIMUM REACHING THE LOW TEENS PERCENT; BUT RISING
BEHIND THE COLD FRONT PASSAGE INTO THE EARLY EVENING. RAIN
SHOWERS MAY START AS EARLY AS 1600 MDT WITH A CWR DURING THE DAY
OF ROUGHLY 20 PERCENT. OVERNIGHT MONDAY INTO TUESDAY THE CWR IS
CLOSER TO 80 PERCENT.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....66-71.
MIN HUMIDITY........17-23 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS UP TO 8 MPH.
RIDGETOP...........SOUTHEAST AROUND 12 MPH.
MIXING HEIGHT.......5600 FT AGL THIS AFTERNOON.
TRANSPORT WINDS.....SOUTH-SOUTHEAST AROUND 15 MPH.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....40-44.
MAX HUMIDITY........52-56 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST-SOUTHWEST WINDS UP TO 8 MPH.
RIDGETOP...........WEST-SOUTHWEST AROUND 10 MPH.
MIXING HEIGHT.......DECREASING TO 700 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST AROUND 10 MPH.
MONDAY
SKY/WEATHER.........CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
CWR.................20 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........10-15 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST 15 TO 20 MPH IN
THE AFTERNOON. GUSTS UP TO 40 MPH.
RIDGETOP...........SOUTHWEST AROUND 10 MPH SHIFTING TO NORTHWEST
AROUND 25 MPH IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 9000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH IN THE MORNING BECOMING
NORTHWEST AT 35 MPH IN THE AFTERNOON.
FORECASTER...MCKEOWN-ROBBIE/PALMQUIST
REQUESTED BY...CHRIS THOMAS
TYPE OF REQUEST...WILDFIRE
.TAG 2608397.0/BYZ
.DELDT 03/29/26
.FORMATTERVERSION 2.0.0
.EMAIL CTHOMAS@SHERIDANCOUNTYWY.GOV
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