391
FNUS76 KEKA 132200
FWSEKA
SPOT FORECAST FOR MP 18 FIRE...NCIMT
NATIONAL WEATHER SERVICE EUREKA CA
300 PM PDT SUN SEP 13 2026
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
IF YOU HAVE QUESTIONS OR CONCERNS REGARDING THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (707) 443-6484
PLEASE DO NOT RESPOND DIRECTLY IF YOU HAVE RECEIVED THIS IN AN EMAIL.
DISCUSSION
HIGH PRESSURE BUILDING OFF THE COAST WILL BRING A
WARMING AND DRYING TREND ACROSS NORTHWEST CALIFORNIA THROUGH
TUESDAY. TONIGHT NORTHEAST WINDS WILL INCREASE TO 10 TO 15 MPH ON
THE RIDGES WITH LIGHT WINDS IN THE VALLEY. MONDAY THESE WILL
SWITCH BACK TO THE NORTHWEST IN THE AFTERNOON AND SOME OF THE
WINDS WILL MAKE IT DOWN TO THE VALLEYS. THIS PATTERN IS EXPECTED
TO CONTINUE INTO TUESDAY. TEMPERATURES ARE EXPECTED TO WARM BY
AROUND 10 DEGREES ON MONDAY. WEDNESDAY AFTERNOON OR OVERNIGHT AN
UPPER LOW HAS THE POTENTIAL TO BRING A SHOWER OR THUNDERSTORM TO
THE SITE, BUT CONFIDENCE IS LOW ON THIS. THERE IS LESS THAN A 10
PERCENT CHANCE FOR THIS. THIS WILL ALSO BRING SLIGHTLY COOLER
TEMPERATURES.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........70-80 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 11 MPH DECREASING TO 5 TO 8
MPH AFTER MIDNIGHT.
MIXING HEIGHT.......DROPPING TO 200-400 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTH 7 TO 9 MPH.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........14 14 14 14 14 5 5 5 4 4 4 4
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............60 58 53 51 51 50 51 50 50 49 49 49
RH..............70 74 75 75 75 75 73 73 74 75 75 75
20 FT WIND DIR..NW NW N N N N N N N N N N
20 FT WIND SPD..11 11 5 5 5 7 7 7 8 8 8 8
20 FT WIND GUST.15 15 7 7 7 9 9 9 12 12 12 12
MIX HGT (KFT)...2.2 2.2 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.NW NW NW NW NW NE NE NE NE NE NE NE
TRANSP WIND SPD.9 9 9 9 9 7 7 7 7 7 7 8
MONDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....75-85...COOLEST IN THE HIGHER ELEVATIONS.
MIN HUMIDITY........30-40 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 8 MPH...SHIFTING TO THE
NORTHWEST 6 TO 11 MPH EARLY IN THE AFTERNOON.
MIXING HEIGHT.......200-400 FT AGL INCREASING TO 1500-2000 FT AGL
LATE IN THE MORNING.
TRANSPORT WINDS.....NORTH 8 TO 10 MPH BECOMING NORTHWEST AROUND
7 MPH IN THE AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........4 4 1 1 1 2 2 2 2 2 2 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............49 47 50 54 60 65 68 71 73 73 72 70
RH..............73 71 66 60 53 46 44 40 39 41 46 53
20 FT WIND DIR..N N NE NE NE NW NW NW NW NW NW NW
20 FT WIND SPD..8 8 8 8 8 6 6 6 11 11 11 9
20 FT WIND GUST.12 12 12 12 12 9 9 9 14 14 14 12
MIX HGT (KFT)...0.4 0.4 0.6 0.7 0.8 1.2 1.4 1.6 1.8 1.9 1.9 1.7
TRANSP WIND DIR.NE NE NE NE NE N N N N NW NW NW
TRANSP WIND SPD.8 8 8 8 8 10 10 10 10 10 10 7
MONDAY NIGHT
SKY/WEATHER.........CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....50-55. COOLEST ON THE VALLEYS.
MAX HUMIDITY........58-68 PERCENT AT HIGHER ELEVATIONS, 70-80
PERCENT IN THE VALLEYS.
WIND (20 FT)........NORTHWEST WINDS 6 TO 9 MPH EARLY IN THE
EVENING...BECOMING EAST 5 TO 7 MPH LATE IN THE
EVENING.
MIXING HEIGHT.......DROPPING TO 200-300 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 7 MPH BECOMING NORTHEAST
AROUND 5 MPH LATE IN THE EVENING.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........3 3 5 5 5 3 3 3 5 5 5 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............67 64 57 56 56 56 56 55 55 54 54 53
RH..............57 63 63 63 63 63 61 59 58 58 57 56
20 FT WIND DIR..NW NW NW NW NW E E E E E E E
20 FT WIND SPD..9 9 4 4 4 6 6 6 6 6 6 6
20 FT WIND GUST.12 12 6 6 6 8 8 8 8 8 8 8
MIX HGT (KFT)...1.3 1.0 0.7 0.5 0.5 0.4 0.4 0.4 0.3 0.3 0.2 0.2
TRANSP WIND DIR.NW NW NW NW NW NE NE NE NE NE NE NE
TRANSP WIND SPD.7 7 7 7 7 5 5 5 5 5 5 5
TUESDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....76-86.
MIN HUMIDITY........28-35 PERCENT.
WIND (20 FT)........EAST WINDS 5 TO 7 MPH IN THE MORNING...BECOMING
WEST 5 TO 8 MPH EARLY IN THE AFTERNOON.
MIXING HEIGHT.......200-300 FT AGL INCREASING TO AROUND 1500 FT AGL
EARLY IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH BECOMING NORTHWEST AROUND 6 MPH
LATE IN THE MORNING.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 3 1 1 1 0 0 0 1 1 1 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............52 52 54 58 64 69 72 74 75 75 74 71
RH..............55 54 52 48 44 40 37 37 38 40 45 50
20 FT WIND DIR..E E E E E NW NW NW W W W W
20 FT WIND SPD..6 6 6 6 6 3 3 3 7 7 7 7
20 FT WIND GUST.8 8 8 8 8 5 5 5 12 12 12 13
MIX HGT (KFT)...0.3 0.3 0.3 0.2 0.5 0.7 1.2 1.3 1.5 1.6 1.6 1.5
TRANSP WIND DIR.NE NE NE NE NE NW NW NW NW NW NW W
TRANSP WIND SPD.5 5 5 5 5 6 6 6 6 6 6 6
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS 72 TO 84.
NORTH WINDS 5 TO 10 MPH.
THURSDAY
CLEAR. LOWS IN THE MID TO UPPER 50S. HIGHS 71 TO 82. WINDS
GENERALLY LESS THAN 5 MPH.
FRIDAY
CLEAR. LOWS IN THE MID TO UPPER 50S. HIGHS 73 TO 84. WINDS
GENERALLY LESS THAN 5 MPH.
OUTLOOK FOR SATURDAY SEPTEMBER 19 THROUGH WEDNESDAY SEPTEMBER 23
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
FORECASTER...KIDWELL
REQUESTED BY...COLLIN EWING
TYPE OF REQUEST...WILDFIRE
.TAG 2621732.0/EKA
.DELDT 09/13/26
.EMAIL 2026.MP18.PLANS@FIRENET.GOV
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