510
FNUS75 KBOI 292316
FWSBOI
SPOT FORECAST FOR BIG GRASS FIRE...USFS
NATIONAL WEATHER SERVICE BOISE ID
516 PM MDT WED JUL 29 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 MDT ON JULY 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (208)334-9060, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
...10 PERCENT CHANCE SHOWERS AND THUNDERSTORMS NEAR THE FIRE THIS
EVENING...
DISCUSSION
A SLIGHT CHANCE (10 PERCENT CHANCE) OF SHOWERS AND THUNDERSTORMS
NEAR THE FIRE THIS EVENING BEFORE SUNSET. IF THE SHOWERS OR STORMS FORM, THEY
HAVE THE POTENTIAL TO PRODUCE GUSTY AND ERRATIC WINDS UP TO 40 MPH
THIS EVENING. OTHERWISE WINDS SHIFT TO THE EAST THIS EVENING WITH
MOSTLY CLEAR SKIES. DRY CONDITIONS CONTINUE WITH NORTHWEST FLOW
DURING THE DAY AND EASTERLY WINDS OVERNIGHT, WITH GUSTY WINDS ON SOME
PORTIONS OF THE FIRE POSSIBLE. ON THURSDAY, SOUTHERN PORTIONS OF THE
FIRE MAY MIX DOWN STRONGER SOUTHWEST WINDS ALOFT. WINDS SHIFT AFTER
SUNSET TO THE EAST AGAIN THURSDAY EVENING.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....57 TO 65.
MAX HUMIDITY........38 TO 50 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST TO NORTHEAST 3 TO 8 MPH IN THE EVENING
SHIFTING TO THE EAST-SOUTHEAST OVERNIGHT. GUSTS
UP TO 14 MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....93 TO 101.
MIN HUMIDITY........9 TO 14 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST 3 TO 7 MPH, SOUTHERN PORTION OF THE FIRE
MAY SEE SOUTHWEST WINDS 8 TO 10 MPH WITH
GUSTS UP TO 15 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......11000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....57 TO 65.
MAX HUMIDITY........36 TO 49 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST 4 TO 9 MPH IN THE EVENING SHIFTING TO
THE EAST 3 TO 9 MPH OVERNIGHT. SOME PORTIONS OF
FIRE MAY SEE GUSTS UP TO 14 MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 5 MPH.
FORECASTER...ANDERSON
REQUESTED BY...MATT BROWN FBAN
TYPE OF REQUEST...WILDFIRE
.TAG 2618438.4/BOI
.DELDT 07/29/26
.FORMATTERVERSION 2.0.0
.EMAIL MATT.BROWN@SCCFD.ORG
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