367
FNUS76 KEKA 102225
FWSEKA
SPOT FORECAST FOR MP-18 FIRE...FOREST SERVICE
NATIONAL WEATHER SERVICE EUREKA CA
325 PM PDT MON AUG 10 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
THE MARINE LAYER GRADUALLY DEEPENS AND INTRUDES
FARTHER INLAND TUESDAY AND WEDNESDAY. COASTAL STRATUS IS UNLIKELY
TO REACH THE AREA, BUT RHS IN THE VALLEYS WILL IMPROVE TONIGHT
INTO TUESDAY MORNING. RECOVERIES IN THE HIGHER ELEVATIONS ARE
FORECAST TO BE IN THE 50S. WINDS MAY REMAIN BREEZY IN THE HIGHER
ELEVATIONS WITH GUSTS TO 10 MPH OVERNIGHT. WINDS INCREASE TUESDAY
AFTERNOON WITH GUSTS OF UP TO 10 TO 15 MPH POSSIBLE IN BOTH THE
VALLEY AND HIGHER ELEVATIONS. MIXING HEIGHTS ARE LIKELY TO REMAIN
LOW BOTH TUESDAY AND WEDNESDAY. A SIMILAR PATTERN IS EXPECTED
TUESDAY NIGHT INTO WEDNESDAY, BUT WITH A DEEPER MARINE LAYER THERE
IS A CHANCE FOR COASTAL STRATUS TO REACH THE VALLEY. RH RECOVERIES
INTO THE 90S ARE LIKELY FOR THE VALLEYS AND 60S OR HIGHER FOR THE
HIGHER ELEVATIONS. A SIMILAR AFTERNOON WIND PATTERN IS EXPECTED
WITH BREEZY NORTHWEST WINDS IN THE AFTERNOON WITH GUSTS UP TO 15
MPH. MIXING HEIGHTS ARE LIKELY TO BE SIMILAR IF NOT SLIGHTLY
HIGHER ON WEDNESDAY AFTERNOON. THE VALLEY INVERSION IS FORECAST
TO BREAK AROUND 11AM AND NOON BOTH TUESDAY AND WEDNESDAY.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR. SMOKE.
CWR.................0 PERCENT.
MIN TEMPERATURE.....LOWER ELEVATIONS: AROUND 59.
HIGHER ELEVATIONS: AROUND 64.
MAX HUMIDITY........LOWER ELEVATIONS: AROUND 77 PERCENT.
HIGHER ELEVATIONS: AROUND 54 PERCENT.
WIND (20 FT)........LOWER ELEVATIONS: NORTH-NORTHEAST 2 TO 5 MPH.
HIGHER ELEVATIONS: NORTH 5 TO 10 MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTHEAST 2 TO 6 MPH.
TIME (PDT) MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........1 1 11 11 11 15
WEATHER COV.....ARS ARS PTY PTY PTY PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............67 65 64 62 61 60
RH..............61 63 65 70 72 75
20 FT WIND DIR..N N N N N N
20 FT WIND SPD..3 3 1 1 1 1
20 FT WIND GUST.5 5
MIX HGT (KFT)...0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.N N N N N NE
TRANSP WIND SPD.6 6 6 6 6 2
TUESDAY
SKY/WEATHER.........SUNNY. SMOKE.
CWR.................0 PERCENT.
MAX TEMPERATURE.....LOWER ELEVATIONS: AROUND 96.
HIGHER ELEVATIONS: AROUND 87.
MIN HUMIDITY........LOWER ELEVATIONS: AROUND 25 PERCENT.
HIGHER ELEVATIONS: AROUND 38 PERCENT.
WIND (20 FT)........LOWER ELEVATIONS: NORTHWEST 5 TO 10 MPH.
HIGHER ELEVATIONS: NORTHWEST 8 TO 15 MPH.
MIXING HEIGHT.......LOWER ELEVATIONS: 3000 FT AGL.
HIGHER ELEVATIONS: 1000 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 2 MPH, NORTHWEST 6 TO 8 MPH LATE
IN THE MORNING.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........15 15 15 15 15 24 24 24 1 1 1 1
WEATHER COV.....PTY PTY PTY PTY PTY ARS ARS ARS ARS ARS ARS DEF
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............59 59 60 64 70 76 81 86 89 90 89 89
RH..............78 78 72 60 49 40 37 33 32 32 32 34
20 FT WIND DIR..N N NW NW NW NW NW NW W W W W
20 FT WIND SPD..1 1 1 1 1 5 5 5 8 8 8 6
20 FT WIND GUST. 6 6 6 10 10 10 7
MIX HGT (KFT)...0.1 0.1 0.1 0.4 0.4 0.8 0.8 0.8 2.0 2.0 2.0 1.7
TRANSP WIND DIR.NE NE NE NE NE NW NW NW NW NW NW NW
TRANSP WIND SPD.2 2 2 2 2 8 8 8 8 8 8 6
TUESDAY NIGHT
SKY/WEATHER.........CLEAR. SMOKE.
CWR.................0 PERCENT.
MIN TEMPERATURE.....LOWER ELEVATIONS: AROUND 57.
HIGHER ELEVATIONS: AROUND 61.
MAX HUMIDITY........LOWER ELEVATIONS: AROUND 90 PERCENT.
HIGHER ELEVATIONS: AROUND 66 PERCENT.
WIND (20 FT)........LOWER ELEVATIONS: NORTH-NORTHEAST 2 TO 5 MPH.
HIGHER ELEVATIONS: NORTH 5 TO 10 MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 6 MPH, NORTHEAST 5 TO 6 MPH LATE
IN THE EVENING.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........1 1 6 6 6 3 3 3 3 3 3 4
WEATHER COV.....DEF DEF ARS ARS ARS PTY PTY PTY PTY PTY PTY PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............86 82 78 71 68 66 64 63 62 59 59 58
RH..............37 44 48 57 61 63 67 70 75 80 80 87
20 FT WIND DIR..W W NW NW NW N N N N N N NE
20 FT WIND SPD..6 6 3 3 3 2 2 2 1 1 1 1
20 FT WIND GUST.7 7 5 5 5 3 3 3
MIX HGT (KFT)...1.7 1.7 0.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.NW NW NW NW NW NE NE NE NE NE NE NE
TRANSP WIND SPD.6 6 6 6 6 6 6 6 6 6 6 5
WEDNESDAY
SKY/WEATHER.........SUNNY. SMOKE.
CWR.................0 PERCENT.
MAX TEMPERATURE.....LOWER ELEVATIONS: AROUND 93.
HIGHER ELEVATIONS: AROUND 85.
MIN HUMIDITY........LOWER ELEVATIONS: AROUND 35 PERCENT.
HIGHER ELEVATIONS: AROUND 42 PERCENT.
WIND (20 FT)........LOWER ELEVATIONS: NORTHWEST 5 TO 10 MPH.
HIGHER ELEVATIONS: NORTHWEST 8 TO 15 MPH.
MIXING HEIGHT.......LOWER ELEVATIONS: 3000 FT AGL.
HIGHER ELEVATIONS: 1000 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH, NORTHWEST 7 TO 8 MPH LATE
IN THE MORNING.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........4 4 6 6 6 1 1 1 0 0 0 0
WEATHER COV.....PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............57 57 58 62 68 74 80 84 87 88 88 86
RH..............86 86 83 75 61 48 41 38 38 36 36 39
20 FT WIND DIR..NE NE N N N W W W W W W W
20 FT WIND SPD..1 1 0 0 0 5 5 5 7 7 7 7
20 FT WIND GUST. 6 6 6 9 9 9 9
MIX HGT (KFT)...0.1 0.1 0.3 0.3 0.3 0.8 0.8 0.8 2.0 2.0 2.0 1.6
TRANSP WIND DIR.NE NE NE NE NE NW NW NW NW NW NW W
TRANSP WIND SPD.5 5 5 5 5 8 8 8 8 8 8 7
FORECASTER...BOOMSMA
REQUESTED BY...NICOLE VAILLANT
TYPE OF REQUEST...WILDFIRE
.TAG 2619389.0/EKA
.DELDT 08/10/26
.EMAIL PATRICK.DOYLE@USDA.GOV,SCOTT.TURNER2@USDA.GOV,NICOLE.VAILLANT@USDA.GOV
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