247
FNUS76 KSTO 210249
FWSSTO
SPOT FORECAST FOR IRISH RX...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
749 PM PDT WED MAY 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DRY WEATHER WITH LOW HUMIDITY AND ABOVE NORMAL TEMPERATURES
WILL PREVAIL AT THE BURN LOCATION THROUGH THE WEEKEND. WINDS
WILL GENERALLY FOLLOW THE TYPICAL DIURNAL REGIME. CUMULUS
BUILDUPS MAY BE VISIBLE FROM ISOLATED SHOWERS OR THUNDERSTORMS THAT MAY
DEVELOP TO THE EAST OVER THE SIERRA CREST THURSDAY AND FRIDAY AFTERNOON,
BUT STORMS ARE NOT EXPECTED AT THE BURN LOCATION. INCREASED ONSHORE FLOW
WILL BRING SOME COOLING AND SLIGHTLY HIGHER HUMIDITY LATER THIS WEEKEND AND
INTO NEXT WEEK, ALONG WITH WEST TO SOUTHWEST GUSTS OF 15 TO 20 MPH. BY MID NEXT
WEEK THERE IS DECENT UNCERTAINTY IN THE FORECAST, HOWEVER THERE IS SOME
INDICATION THAT LIGHT SHOWERS ARE POSSIBLE. CONFIDENCE IS LOW ON ANY
DETAILS OR TIMING, AND THERE IS VARIABILITY IN THE TRACK OF THE TROUGH.
THURSDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....78-82.
MIN HUMIDITY........24-28 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS UP TO 5 MPH EARLY IN THE
MORNING THEN BECOMING WEST UP
TO 7 MPH IN THE LATE MORNING AND AFTERNOON
WITH GUSTS OF 12 TO 18 MPH.
RIDGETOP...........EAST AROUND 5 TO 7 MPH SHIFTING TO THE
WEST 7 TO 8 MPH LATE IN THE MORNING.
MIXING HEIGHT.......INCREASING TO 5500 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 8 MPH SHIFTING TO THE
NORTHWEST AROUND 5 MPH EARLY IN THE MORNING,
THEN SHIFTING TO THE WEST 7 TO 8 MPH LATE IN
THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...LESS THAN 5 PERCENT.
TIME (PDT) 6 AM 10 AM 2 PM
SKY COVER.......CLEAR CLEAR CLEAR
CWR.............0 0 0
CHC OF THDR (%).0 0 4
TEMP............56 75 79
RH..............43 28 29
SL/VL WIND......SE 5G9 W 5G12 W 7G18
RIDGETOP WIND...E 8 W 5 W 7
MIX HGT (FT)....400 2200 5500
TRANSPORT WIND..NE 8 NW 5 W 7
THURSDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....56-60.
MAX HUMIDITY........46-50 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 6 MPH EARLY IN THE
EVENING WITH GUSTS TO 15 MPH BECOMING LIGHT.
RIDGETOP...........NORTH TO NORTHWEST AROUND 6 TO 7 MPH.
MIXING HEIGHT.......DECREASING TO 400 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 8 MPH SHIFTING TO THE
NORTHEAST 8 TO 9 MPH LATE IN THE EVENING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...LESS THAN 5 PERCENT.
TIME (PDT) 6 PM 10 PM 2 AM
SKY COVER.......CLEAR CLEAR CLEAR
CWR.............0 0 0
CHC OF THDR (%).4 0 0
TEMP............78 64 60
RH..............28 44 48
SL/VL WIND......NW 6G15 N 3G8 NE 5G9
RIDGETOP WIND...NW 8 NNW 8 NNW 9
MIX HGT (FT)....3500 500 400
TRANSPORT WIND..NW 8 N 8 NE 9
FRIDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....79-83.
MIN HUMIDITY........21-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS UP TO 5 MPH EARLY IN THE MORNING
BECOMING WEST 5 TO 7 MPH LATE IN THE MORNING AND
AFTERNOON WITH GUSTS OF 12 TO 17 MPH.
RIDGETOP...........EAST AROUND 7 MPH SHIFTING TO THE SOUTHWEST 6
TO 9 MPH LATE IN THE MORNING THEN WEST IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 6400 FT AGL.
TRANSPORT WINDS.....EAST 6 TO 9 MPH SHIFTING TO THE SOUTHWEST 7 TO
8 MPH LATE IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...LESS THAN 5 PERCENT.
TIME (PDT) 6 AM 10 AM 2 PM
SKY COVER.......CLEAR CLEAR CLEAR
CWR.............0 0 0
CHC OF THDR (%).0 0 4
TEMP............58 74 79
RH..............46 31 25
SL/VL WIND......SE 5G10 S 2G5 W 7G17
RIDGETOP WIND...E 7 SW 6 W 8
MIX HGT (FT)....400 600 6400
TRANSPORT WIND..E 9 SW 6 SW 8
FORECAST DAYS 3 THROUGH 7
SATURDAY
CLEAR. LOWS IN THE UPPER 50S. HIGHS AROUND 80. SOUTHWEST WINDS AROUND
5 TO 8 MPH.
SUNDAY
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS AROUND
5 TO 8 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE MID 70S. LIGHT
WINDS. WEST WINDS AROUND 5 TO 8 MPH.
TUESDAY
COOLER. MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID
60S. SOUTHWEST WINDS AROUND 5 TO 8 MPH.
WEDNESDAY
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN. LOWS IN THE UPPER 40S. HIGHS
IN THE MID 60S. WEST WINDS AROUND 5 TO 8 MPH.
FORECASTER...KH
REQUESTED BY...SYLVESTER RUIZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2613983.2/STO
.DELDT 05/21/26
.FORMATTERVERSION 2.0.0
.EMAIL SYLVESTER.RUIZ@USDA.GOV
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