405
FNUS76 KSTO 041953
FWSSTO
SPOT FORECAST FOR GRCC RX...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
1253 PM PDT MON MAY 4 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON MAY 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A DRYING AND WARMING TREND IS FORECAST THIS WEEK INTO THE WEEKEND
AS HIGH PRESSURE BUILDS ACROSS THE REGION. DAYTIME RELATIVE
HUMIDITY VALUES WILL BE LOWER COMPARED TO PREVIOUS DAYS AS WELL,
DROPPING INTO THE 40S BY WEDNESDAY. LIGHT, TERRAIN DRIVEN WINDS
ARE EXPECTED, WITH SPEEDS LESS THAN 10 MPH. TEMPERATURES WILL
CONTINUE ON A WARMING TREND INTO THE WEEKEND AS MINIMUM RHS
CONTINUE TO LOWER.
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....69-73.
MIN HUMIDITY........55-59 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTH UP TO 7 MPH IN THE
AFTERNOON.
RIDGETOP...........SOUTH 5 TO 7 MPH.
MIXING HEIGHT.......3900 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 7 MPH.
CWR.................2 PERCENT.
CHANCE OF THUNDER...5 PERCENT.
TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MC MC PC PC PC PC MCR MCR MCR
CWR.............0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 10 0
TEMP............56 58 60 62 64 66 69 70 70
RH..............95 88 81 75 69 65 60 58 57
SL/VL WIND DIR..S S S S S S S SE SE
SL/VL WIND SPD..2 3 3 5 5 5 6 6 7
SL/VL WIND GUST.5 6 7 8 8 9 10 12 12
RIDGE WIND DIR..S S S S S S S S S
RIDGE WIND SPD..6 6 5 5 5 6 6 6 7
MIX HGT (KFT)...1.8 1.8 3.0 3.0 3.0 3.9 3.9 3.9 3.5
TRANSP WIND DIR.S S S S S S S S S
TRANSP WIND SPD.6 6 5 5 5 6 6 6 7
TUESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....53-57.
MAX HUMIDITY........92-96 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 7 MPH IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........SOUTHEAST-EAST 3 TO 7 MPH SHIFTING TO THE NORTH
EARLY IN THE MORNING.
MIXING HEIGHT.......600 FT AGL.
TRANSPORT WINDS.....SOUTHEAST-EAST 3 TO 7 MPH SHIFTING TO THE NORTH
EARLY IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR MCR MCR MCR MCR PC PC PC MCR MCR MCR PC
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............71 70 67 64 63 62 61 60 59 58 56 56
RH..............57 59 67 73 77 80 83 85 87 90 92 93
SL/VL WIND DIR..SE SE SE SE SE E E E E E E NE
SL/VL WIND SPD..7 7 6 6 6 3 3 3 2 2 2 1
SL/VL WIND GUST.12 12 12 12 12 7 7 7 3 3 3 2
RIDGE WIND DIR..S S SE SE SE SE SE SE E E E N
RIDGE WIND SPD..7 7 7 7 7 7 7 7 3 3 3 2
MIX HGT (KFT)...3.5 3.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6
TRANSP WIND DIR.S S SE SE SE SE SE SE E E E N
TRANSP WIND SPD.7 7 7 7 7 7 7 7 3 3 3 2
WEDNESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....79-83.
MIN HUMIDITY........43-48 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT NORTHEAST WINDS BECOMING SOUTH UP TO 6 MPH
LATE IN THE AFTERNOON.
RIDGETOP...........NORTH AROUND 2 MPH SHIFTING TO THE WEST 3 TO 6 MPH
IN THE MORNING, THEN SHIFTING TO THE SOUTHWEST
AROUND 6 MPH IN THE AFTERNOON.
MIXING HEIGHT.......3200 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 2 MPH SHIFTING TO THE WEST 3 TO 6 MPH
IN THE MORNING, THEN SHIFTING TO THE SOUTHWEST
AROUND 6 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC PC PC PC PC PC PC PC CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............57 58 60 62 65 68 72 75 77 79 81 81
RH..............93 92 89 84 77 70 64 59 54 49 46 46
SL/VL WIND DIR..NE NE SW SW SW W W W SW SW SW S
SL/VL WIND SPD..1 1 2 2 2 3 3 3 5 5 5 6
SL/VL WIND GUST.2 2 3 3 3 6 6 6 8 8 8 10
RIDGE WIND DIR..N N W W W W W W SW SW SW S
RIDGE WIND SPD..2 2 3 3 3 5 5 5 6 6 6 6
MIX HGT (KFT)...0.6 0.6 1.3 1.3 1.3 2.6 2.6 2.6 3.2 3.2 3.2 2.8
TRANSP WIND DIR.N N W W W W W W SW SW SW S
TRANSP WIND SPD.2 2 3 3 3 5 5 5 6 6 6 6
FORECASTER...IDS
REQUESTED BY...JACOB KURKO
TYPE OF REQUEST...PRESCRIBED
.TAG 2612639.0/STO
.DELDT 05/04/26
.FORMATTERVERSION 2.0.0
.EMAIL JACOB.KURKO@USDA.GOV
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