746
FNUS76 KEKA 172247
FWSEKA
SPOT FORECAST FOR MP 18 FIRE...NCIMT
NATIONAL WEATHER SERVICE EUREKA CA
347 PM PDT THU SEP 17 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
AFTER A CONVECTIVE SPELL FROM THE PREVIOUS TWO LATE AFTERNOONS, CONVECTIVE POTENTIAL
EASES AS THE UPPER LEVEL LOW LOSES SOME OF ITS ENERGY AND CONTINUES EAST OF THE AREA. OVERNIGHT
RECOVERY RH VALUES RANGE 68-71% INTO FRIDAY MORNING. LIGHT EASTERLY WINDS EARLY FRIDAY MORNING
AROUND 1-3MPH, DIPPING TO NEAR CALM BY DAWN. WINDS VEER OUT OF WNW BY LATE MORNING AND BUILD FROM
2-5MPH IN THE AFTERNOON, LASTING INTO THE EVENING BEFORE EASING TO NEAR CALM AND VEERING NNE. HIGH
FRIDAY OF 73-74F WITH A MINIMUM LOW RH OF 46-47%. WINDS OVERNIGHT INTO SATURDAY MORNING ARE LIGHT
AND OUT OF THE EAST AT 2-3MPH. OVERNIGHT RECOVERY RH VALUES RANGE 63-76% INTO SATURDAY MORNING.
NOT MUCH CLOUD COVER OVERNIGHT SO FOG COULD FORM IN THE VALLEYS ADJACENT TO THE AREA. WINDS SWITCH
TO WNW BEFORE NOON AT 1-3MPH, BUILDING TO 3-6MPH FROM THE LATE AFTERNOON INTO THE EVENING. HIGH TEMP
SATURDAY OF 77-78F WITH A MINIMUM RH OF 39-40%.
FRIDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....70-78.
MIN HUMIDITY........43-52 PERCENT.
WIND (20 FT)........VARIABLE 1 TO 3 MPH...BECOMING NORTHWEST AROUND
5 MPH EARLY IN THE AFTERNOON.
MIXING HEIGHT.......400-700 FT AGL INCREASING TO 1300-2600 FT AGL
LATE IN THE MORNING.
TRANSPORT WINDS.....NORTHEAST AROUND 3 MPHNORTHWEST 5 TO 7 MPH LATE
IN THE MORNING.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 6 6 6 2 2 2 4 4 4 4
CWR.............0 0 0 0 0 0 0 0 0 0 0
TEMP............52 54 58 63 67 71 72 74 73 72 71
RH..............75 73 65 60 54 51 48 47 48 49 53
20 FT WIND DIR..E NE NE NE NW NW NW NW NW NW NW
20 FT WIND SPD..4 4 4 4 3 3 3 5 5 5 5
20 FT WIND GUST.6 7 7 7 5 5 5 10 10 10 12
MIX HGT (KFT)...0.4 0.7 0.7 0.7 2.4 2.4 2.4 2.6 2.6 2.6 1.3
TRANSP WIND DIR.NE NE NE NE NW NW NW NW NW NW NW
TRANSP WIND SPD.3 3 3 3 7 7 7 7 7 7 5
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........66-76 PERCENT.
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH EARLY IN THE
EVENING...BECOMING VARIABLE 1 TO 3 MPH,
THEN...BECOMING EAST AROUND 5 MPH EARLY IN THE
MORNING.
MIXING HEIGHT.......300-1300 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPHNORTHEAST AROUND 3 MPH
LATE IN THE EVENING.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 4 5 5 5 4 4 4 8 8 8 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............68 63 58 57 57 57 57 57 57 56 56 55
RH..............58 66 73 72 71 70 69 68 68 68 68 68
20 FT WIND DIR..NW NW W W W NE NE NE E E E E
20 FT WIND SPD..5 5 3 3 3 3 3 3 3 3 3 5
20 FT WIND GUST.12 12 5 5 5 6 6 6 7
MIX HGT (KFT)...1.3 1.3 0.3 0.3 0.3 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.5 5 5 5 5 3 3 3 3 3 3 3
SATURDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....73-81.
MIN HUMIDITY........36-44 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH IN THE
MORNING...BECOMING VARIABLE 2 TO 4 MPH,
THEN...BECOMING WEST 5 TO 7 MPH EARLY IN THE
AFTERNOON.
MIXING HEIGHT.......300-1800 FT AGL INCREASING TO 1800-3000 FT AGL
EARLY IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 3 MPHWEST AROUND 6 MPH LATE IN
THE MORNING.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 5 10 10 10 8 8 8 11 11 11 15
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 54 55 59 64 70 73 75 76 77 76 73
RH..............66 65 63 58 51 45 42 40 40 41 44 49
20 FT WIND DIR..E E E E E NW NW NW W W W W
20 FT WIND SPD..5 5 5 5 5 3 3 3 6 6 6 6
20 FT WIND GUST.7 7 8 8 8 5 5 5 8 8 8 10
MIX HGT (KFT)...0.4 0.4 0.3 0.3 0.3 1.8 1.8 1.8 3.0 3.0 3.0 1.8
TRANSP WIND DIR.NE NE NE NE NE W W W W W W W
TRANSP WIND SPD.3 3 3 3 3 6 6 6 6 6 6 6
FORECAST DAYS 3 THROUGH 5
SUNDAY
MOSTLY CLEAR. LOWS IN THE MID TO UPPER 50S. HIGHS 72 TO 83. WINDS
GENERALLY LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS IN THE MID TO UPPER 50S. HIGHS 70 TO 81. WINDS
GENERALLY LESS THAN 5 MPH.
TUESDAY
MOSTLY CLEAR. LOWS IN THE LOWER TO MID50S. HIGHS 68 TO 79. WINDS
GENERALLY LESS THAN 5 MPH.
FORECASTER...SWAFFORD
REQUESTED BY...COLLIN EWING
TYPE OF REQUEST...WILDFIRE
.TAG 2621732.4/EKA
.DELDT 09/17/26
.EMAIL 2026.MP18.PLANS@FIRENET.GOV
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