022
FNUS76 KSTO 220138
FWSSTO
SPOT FORECAST FOR IRISH RX...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
638 PM PDT THU MAY 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON MAY 22.
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 FRIDAY AND INTO THE WEEKEND.
WIND WILL GENERALLY FOLLOW THE TYPICAL DIURNAL REGIME ON FRIDAY.
CUMULUS BUILDUPS MAY BE VISIBLE FROM ISOLATED SHOWERS OR THUNDERSTORMS
THAT DEVELOP TO THE EAST OVER THE SIERRA CREST ON FRIDAY AFTERNOON,
BUT STORMS ARE UNLIKELY (LESS THAN 5% CHANCE) OVER THE BURN LOCATION.
INCREASED ONSHORE FLOW WILL BRING SOME COOLING AND SLIGHTLY HIGHER HUMIDITY
LATER THIS WEEKEND AND INTO EARLY NEXT WEEK, ALONG WITH WEST TO
SOUTHWEST GUSTS OF UP TO 15 TO 20 MPH. BY MID NEXT WEEK THERE STILL
UNCERTAINTY IN THE FORECAST, HOWEVER THERE IS SOME INDICATION THAT LIGHT
SHOWERS ARE POSSIBLE. CONFIDENCE IS LOW ON SPECIFIC DETAILS AND TIMING, AS
THERE IS STILL SOME VARIABILITY IN THE TRACK OF THE TROUGH.
FRIDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....78-82.
MIN HUMIDITY........23-27 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS UP TO 5 MPH EARLY IN THE MORNING
BECOMING WEST 4 TO 7 MPH LATE MORNING WITH GUSTS OF
12 TO 15 MPH IN THE AFTERNOON.
RIDGETOP...........EAST AROUND 8 MPH SHIFTING TO THE SOUTHWEST 5
TO 7 MPH EARLY IN THE MORNING, THEN SHIFTING TO
THE WEST AROUND 7 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 6100 FT AGL.
TRANSPORT WINDS.....EAST AROUND 8 MPH SHIFTING TO THE SOUTHWEST 5
TO 7 MPH EARLY IN THE MORNING, THEN SHIFTING TO
THE WEST AROUND 7 MPH LATE IN THE AFTERNOON.
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............57 75 78
RH..............51 31 27
SL/VL WIND......E 5G8 SW 5G10 W 7G16
RIDGETOP WIND...E 8 S 5 SW 7
MIX HGT (FT)....400 2700 6100
TRANSPORT WIND..E 8 S 5 SW 7
FRIDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....55-59.
MAX HUMIDITY........44-48 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS UP TO 5 MPH EARLY IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........WEST 5 TO 7 MPH EARLY IN THE EVENING BECOMING
EAST OVERNIGHT.
MIXING HEIGHT.......DECREASING TO 400 FT AGL.
TRANSPORT WINDS.....WEST AROUND 7 MPH SHIFTING TO THE NORTH AROUND
6 MPH EARLY IN THE EVENING, THEN SHIFTING TO
THE EAST 8 TO 10 MPH LATE IN THE EVENING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6 PM 10 PM 2 AM
SKY COVER.......CLEAR MCLEAR CLEAR
CWR.............0 0 0
CHC OF THDR (%).0 0 0
TEMP............78 62 59
RH..............26 44 46
SL/VL WIND......W 5G14 N 3G8 E 5G9
RIDGETOP WIND...W 7 N 6 E 9
MIX HGT (FT)....3800 500 400
TRANSPORT WIND..W 7 N 6 E 9
SATURDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....77-81.
MIN HUMIDITY........27-31 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 5 MPH EARLY IN THE MORNING
BECOMING WEST-SOUTHWEST 5 TO 7 MPH LATE IN THE MORNING
WITH GUSTS OF 12 TO 16 MPH.
RIDGETOP...........EAST 7 TO 10 MPH SHIFTING TO THE SOUTHWEST 8 TO
10 MPH LATE IN THE MORNING.
MIXING HEIGHT.......INCREASING TO 6000 FT AGL.
TRANSPORT WINDS.....EAST 7 TO 10 MPH SHIFTING TO THE SOUTHWEST 8 TO
10 MPH LATE IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6 AM 10 AM 2 PM
SKY COVER.......CLEAR CLEAR CLEAR
CWR.............0 0 0
CHC OF THDR (%).0 0 0
TEMP............57 72 77
RH..............44 32 30
SL/VL WIND......E 5G9 E 2G5 W 7G17
RIDGETOP WIND...E 10 SE 7 SW 10
MIX HGT (FT)....400 900 6000
TRANSPORT WIND..E 10 SE 7 SW 10
FORECAST DAYS 3 THROUGH 7
SUNDAY
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE MID 70S.
WEST WINDS 5 TO 8 MPH WITH GUSTS TO 14 MPH.
MEMORIAL DAY
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE MID 70S.
WEST WINDS 5 TO 9 MPH WITH GUSTS TO 16 MPH.
TUESDAY
COOLER. MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER
60S. LIGHT WINDS.
WEDNESDAY
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN. LOWS IN THE MID 40S. HIGHS
IN THE MID 60S. LIGHT WINDS.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 60S.
LIGHT WINDS.
FORECASTER...KH
REQUESTED BY...SYLVESTER RUIZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2613983.3/STO
.DELDT 05/22/26
.FORMATTERVERSION 2.0.0
.EMAIL SYLVESTER.RUIZ@USDA.GOV
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