405
FNUS75 KBOI 301510
FWSBOI
SPOT FORECAST FOR BIG GRASS FIRE...USFS
NATIONAL WEATHER SERVICE BOISE ID
910 AM MDT THU JUL 30 2026
FORECAST IS BASED ON FORECAST START TIME OF 1200 MDT ON JULY 30.
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.
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING FOR DRY/WINDY CONDITIONS...
..WINDY CONDITIONS CONTINUE THROUGH MONDAY MORNING
DISCUSSION
TODAY AND TOMORROW HOT, DRY, AND MILDLY BREEZY CONDITIONS
CONTINUE. GUSTY WINDS ALONGSIDE A DRY COLD FRONTAL PASSAGE THIS
WEEKEND HAVE PROMPTED THE ISSUANCE OF A FIRE WEATHER WATCH
SATURDAY AFTERNOON AND EVENING. WESTERLY WINDS 15 TO 20 MPH WITH
GUSTS UP TO 30 MPH MOVE THROUGH THE FIRE ALONGSIDE MINIMUM RHS OF
5 TO 10% DURING THE WATCH. WHILE RHS BEGIN TO RISE AROUND SUNSET,
WINDS AT THE FIRE WILL BE GUSTING 15 TO 25 MPH THROUGH MONDAY
MORNING. MINIMUM RHS EACH DAY HOLD RELATIVELY STEADY THROUGH THE
FORECAST AT 5 TO 15% EACH DAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....91 TO 97.
MIN HUMIDITY........9 TO 14 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST 5 TO 8 MPH.
MIXING HEIGHT.......9500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....60 TO 65.
MAX HUMIDITY........36 TO 46 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST 3 TO 8 MPH IN THE EVENING SHIFTING TO
THE EAST 4 TO 10 MPH OVERNIGHT.
MIXING HEIGHT.......200 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
FRIDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....95 TO 100.
MIN HUMIDITY........6 TO 11 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......WEST 6 TO 12 MPH. GUSTS UP TO 18 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......12000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
FORECASTER...MACFARLANE
REQUESTED BY...MATT BROWN FBAN
TYPE OF REQUEST...WILDFIRE
.TAG 2618438.5/BOI
.DELDT 07/30/26
.FORMATTERVERSION 2.0.0
.EMAIL MATT.BROWN@SCCFD.ORG
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