510  
FNUS76 KSTO 030920  
FWSSTO  
 
SPOT FORECAST FOR IRON TRAILS PROJECT...USFS  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
120 AM PST WED DEC 3 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PST ON DECEMBER 03.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
SEASONABLE AND DRY WEATHER IS EXPECTED TO CONTINUE IN THE BURN  
VICINITY ACROSS THE MIDDLE OF THE WEEK. BREEZY EAST-NORTHEAST  
WINDS EXPECTED TODAY INTO THURSDAY MORNING, WITH STRONGEST GUSTS  
17 TO 21 MPH THROUGH THIS AFTERNOON, GRADUALLY DECREASING IN THE  
EVENING AND OVERNIGHT HOURS. PERSISTENT EAST-NORTHEAST WINDS  
EXPECTED TO RESULT IN LIMITED OVERNIGHT HUMIDITY RECOVERY. A  
SLIGHT WARMING TREND IS THEN ON TRACK LATE WEEK INTO THE WEEKEND  
AS DRY WEATHER PERSISTS.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....48-53.  
MIN HUMIDITY........23-28 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS 7 TO 10 MPH. GUSTS 17 TO 21 MPH  
THROUGHOUT THE DAY.  
RIDGETOP...........EAST 22 TO 28 MPH DECREASING TO AROUND 17 MPH  
LATE IN THE AFTERNOON.  
MIXING HEIGHT.......RISING TO NEAR 2300 FT AGL BY THE AFTERNOON.  
TRANSPORT WINDS.....EAST 22 TO 28 MPH DECREASING TO AROUND 17 MPH  
LATE IN THE AFTERNOON.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
 
TIME (PST) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM  
SKY COVER.......PCLDY PCLDY PCLDY PCLDY PCLDY PCLDY  
CWR.............0 0 0 0 0 0  
CHC OF THDR (%).0 0 0 0 0 0  
TEMP............31 37 47 48 48 42  
RH..............58 46 28 26 28 38  
SL/VL WIND......E 8 E 9 E 10 E 8 E 7 E 7  
SL/VL WIND GUST.18 21 21 18 17 17  
RIDGETOP WIND...E 26 E 26 E 28 E 22 E 22 E 17  
MIX HGT (FT)....1600 1600 2200 2300 2300 1200  
TRANSPORT WIND..E 26 E 26 E 28 E 22 E 22 E 17  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....27-32.  
MAX HUMIDITY........49-54 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS 5 TO 8 MPH IN THE EVENING BECOMING  
LIGHT.  
RIDGETOP...........EAST 13 TO 17 MPH.  
MIXING HEIGHT.......FALLING TO NEAR 1000 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....EAST 13 TO 17 MPH.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
 
TIME (PST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......PCLDY MCLEAR MCLEAR MCLEAR MCLEAR MCLEAR  
CWR.............0 0 0 0 0 0  
CHC OF THDR (%).0 0 0 0 0 0  
TEMP............37 34 33 32 31 31  
RH..............44 48 49 47 44 41  
SL/VL WIND......E 7 E 8 E 6 E 6 E 3 E 2  
SL/VL WIND GUST.17 18 14 14 8 7  
RIDGETOP WIND...E 17 E 17 E 14 E 14 E 13 E 13  
MIX HGT (FT)....1200 1000 1000 1000 1000 1000  
TRANSPORT WIND..E 17 E 17 E 14 E 14 E 13 E 13  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....54-59.  
MIN HUMIDITY........22-27 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS.  
RIDGETOP...........NORTHEAST 7 TO 13 MPH SHIFTING TO THE NORTH  
AROUND 6 MPH EARLY IN THE AFTERNOON.  
MIXING HEIGHT.......RISING TO NEAR 2700 FT AGL BY THE AFTERNOON.  
TRANSPORT WINDS.....NORTHEAST 7 TO 13 MPH SHIFTING TO THE NORTH  
AROUND 6 MPH EARLY IN THE AFTERNOON.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
 
TIME (PST) 6 AM 9 AM NOON 3 PM  
SKY COVER.......MCLEAR MCLEAR PCLDY MCLEAR  
CWR.............0 0 0 0  
CHC OF THDR (%).0 0 0 0  
TEMP............30 43 55 53  
RH..............40 29 22 33  
SL/VL WIND......E 2G7 E 2G7 E 2G6 NW 3G9  
RIDGETOP WIND...E 13 E 9 NE 7 N 5  
MIX HGT (FT)....1000 1000 1800 2700  
TRANSPORT WIND..E 13 E 9 NE 7 N 5  
   
FORECAST DAYS 3 THROUGH 5
 
   
FRIDAY
 
 
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE LOWER 60S. LIGHT  
WINDS DURING THE DAY, BECOMING EAST-NORTHEAST OVERNIGHT. DAYTIME  
HUMIDITY IN THE UPPER 30S.   
SATURDAY
 
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS AROUND 60. LIGHT  
WINDS DURING THE DAY, BECOMING EAST-NORTHEAST OVERNIGHT. DAYTIME  
HUMIDITY IN THE MID 40S.   
SUNDAY
 
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S.  
LIGHT WINDS DURING THE DAY, BECOMING EAST-NORTHEAST OVERNIGHT.  
DAYTIME HUMIDITY IN THE UPPER 30S.  
 

 
FORECASTER...JW  
REQUESTED BY...IRON TRAILS RXB3 TRAINEE/ JOSE PELAYO  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2526707.2/STO  
.DELDT 12/03/25  
.FORMATTERVERSION 2.0.0  
.EMAIL JOSE.PELAYO@USDA.GOV  
 
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