426
FNUS76 KOTX 140033
FWSOTX
SPOT FORECAST FOR UPPER SMITH FIRE...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
533 PM PDT MON JUL 13 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 PDT ON JULY 13.
DISCUSSION
DRY WEATHER WILL CONTINUE AT THE UPPER SMITH FIRE LOCATION
THROUGH AT LEAST TUESDAY MORNING. THERE IS A LOW-END CHANCE
(5 TO 10%) FOR LIGHT SPRINKLES OR THUNDERSTORMS IN THE VICINITY OF THE
FIRE LOCATION TUESDAY AFTERNOON AND WEDNESDAY MORNING, MAINLY
BETWEEN 1800-2300 HOURS AND 0500-1100 HOURS RESPECTIVELY. GREATER
CHANCES FOR THUNDERSTORMS (15-20%) EMERGE WEDNESDAY AFTERNOON
AFTER 1200 HOURS. CWR VALUES REMAIN AT 0%. THE INCREASED MOISTURE
WILL ALSO LEAD TO OVERALL HIGHER RH VALUES TUESDAY THROUGH
WEDNESDAY. WINDS WILL BE LIGHT THROUGH THE PERIOD, BECOMING
LARGELY TERRAIN DRIVEN AT NIGHT AFTER SUNDOWN. GUSTY, ERRATIC
WINDS CANNOT BE RULED NEAR IN ANY THUNDERSTORMS THAT DEVELOP IN
THE REGION. TEMPERATURES AROUND THE FIRE AREA WILL BE HIGHLY
ELEVATION DEPENDENT, WITH CONSIDERABLY WARMER TEMPERATURES IN THE
KOOTENAY RIVER VALLEY JUST TO THE EAST.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
***************************************************************
FORECASTS FOR 20 FOOT WIND SPEEDS (VALLEYS AND RIDGE TOPS) ARE
10 MINUTE AVERAGES REFLECTING RAWS WIND.
***VENTILATION INDEX IS DERIVED FROM TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT DIVIDED BY 100.
CATEGORIES: LOW (< 200), MODERATE (200-500),
HIGH (500-800), AND VERY HIGH (> 800).
***************************************************************
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 53-56.
MAX HUMIDITY........46-51 PERCENT.
WIND (20 FT)........LIGHT SOUTHERLY WINDS 5 MPH OR LESS, BECOMING
VARIABLE AFTER 0500 HOURS.
MIXING HEIGHT.......500FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 7 MPH.
VENTILATION INDEX...LOW (30).
TUESDAY
SKY/WEATHER.........PARTLY SUNNY. A SLIGHT CHANCE OF SPRINKLES
OR A THUNDERSTORM.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....AROUND 76-81.
MIN HUMIDITY........29 TO 34 PERCENT.
WIND (20 FT)........LIGHT VARIABLE WINDS BECOMING SOUTHWEST
5 TO 7 MPH BY 1400 HOURS.
MIXING HEIGHT.......2000 FT AGL INCREASING TO 6000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTH 5 TO 9 MPH, BECOMING SOUTHWESTERLY
9 TO 12 MPH BY 1300 HOURS.
VENTILATION INDEX...LOW (124) INCREASING TO HIGH (502) IN THE
AFTERNOON.
TUESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SPRINKLES
OR A THUNDERSTORM.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MIN TEMPERATURE.....AROUND 57-59.
MAX HUMIDITY........61-65 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 6 MPH. WINDS BECOME LIGHT
AND SHIFT NORTHWESTERLY BETWEEN 0600-0700 HOURS.
MIXING HEIGHT.......5000 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 7 MPH.
VENTILATION INDEX...MODERATE (416) DECREASING TO LOW (24)
OVERNIGHT.
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING, THEN A CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.15 TO 20 PERCENT.
MAX TEMPERATURE.....AROUND 75-78.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........LIGHT VARIABLE WINDS IN THE MORNING, BECOMING
WEST-NORTHWESTERLY 5 TO 6 MPH IN THE AFTERNOON.
GUSTY AND ERRATIC WINDS POSSIBLE NEAR
THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......2500 FT AGL INCREASING TO 5000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 5 TO 11 MPH.
VENTILATION INDEX...LOW (130) INCREASING TO HIGH (597) IN THE
AFTERNOON.
FORECASTER...PP
REQUESTED BY...COEUR DALENE DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2617328.0/OTX
.DELDT 07/13/26
.FORMATTERVERSION 2.0.0
.EMAIL MITCHELL.PROPHET@USDA.GOV,TYLER.CLEMENSON@USDA.GOV,IDCDC@FIRENET.GOV
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