943
FNUS76 KEKA 160015
FWSEKA

Spot Forecast for MP 18 Fire...NCIMT
National Weather Service Eureka CA
515 PM PDT Tue Sep 15 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...Wednesday, an upper level trough and weak cold front
will enter the area. This may bring a shower or possibly a thunderstorm
to the area Wednesday afternoon or Wednesday night. There is a chance of a quarter
of an inch of rain if one of the heavier storms moves over the site. The
thunderstorm chances have increased slightly with a 10 - 15% chance Wednesday
afternoon or evening. There is the potential for showers into the overnight hours.
Cooler weather and a stray shower are possible Thursday. Warmer and drier conditions
expected Friday and into the weekend.

.WEDNESDAY...

Sky/weather.........Sunny then becoming partly cloudy. Slight
                    chance of rain showers late in the morning.
                    Slight chance of thunderstorms early in the
                    afternoon.
CWR.................0 percent increasing to 11 percent late in the
                    morning.
Max temperature.....68-76.
Min humidity........42-51 percent.
Wind (20 ft)........Northwest winds 5 to 9 mph...shifting to the
                    west 5 to 8 mph late in the afternoon. Gusty
                    and erratic winds expected near thunderstorms
                    early in the afternoon.
Mixing height.......400-900 ft AGL increasing to 3700-3800 ft AGL
                    late in the morning, then decreasing to 1200 ft
                    AGL late in the afternoon.
Transport winds.....North 5 to 7 mph.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9   9   5   5   5   38  38  38  43  43  43  46
Weather cov.....                    SCH SCH SCH SCH SCH SCH SCH
Weather type....                    RW  RW  RW  RW  RW  RW  RW
Tstm cov........                                SCH SCH SCH SCH
CWR.............0   0   0   0   0   10  10  10  10  10  10  10
Temp............50  49  51  55  59  63  67  69  71  70  70  70
RH..............77  77  73  67  62  55  52  48  46  49  52  57
20 FT wind dir..N   N   N   N   N   NW  NW  NW  NW  NW  NW  W
20 FT wind spd..6   6   7   7   7   6   6   6   9   9   9   8
20 FT wind gust.8   8   12  12  12  10  10  10  17  17  17  12
Mix hgt (kft)...0.4 0.4 0.9 0.9 0.9 3.8 3.8 3.8 3.7 3.7 3.7 1.2
Transp wind dir.NE  NE  NE  NE  NE  N   N   N   N   N   N   N
Transp wind spd.5   5   5   5   5   7   7   7   7   7   7   6

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy. Slight chance of thunderstorms
                    early in the evening. Slight chance of rain
                    showers in the evening.
CWR.................5 percent.
Min temperature.....52-55.
Max humidity........58-68 percent.
Wind (20 ft)........West winds 5 to 8 mph early in the
                    evening...becoming variable 2 to 5 mph,
                    then...becoming east 5 to 8 mph late in the
                    evening. Gusty and erratic winds expected near
                    thunderstorms early in the evening.
Mixing height.......300-1200 ft AGL.
Transport winds.....North around 6 mphsoutheast 3 to 5 mph late in
                    the evening.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........46  46  38  38  38  10  10  10  23  23  23  17
Weather cov.....SCH SCH SCH SCH SCH
Weather type....RW  RW  RW  RW  RW
Tstm cov........SCH SCH
CWR.............10  10  10  10  10  0   0   0   0   0   0   0
Temp............68  65  62  58  58  58  57  57  56  55  55  54
RH..............59  66  71  68  65  62  60  59  59  61  62  62
20 FT wind dir..W   W   W   W   W   E   E   E   E   E   E   E
20 FT wind spd..8   8   2   2   2   7   7   7   6   6   6   6
20 FT wind gust.12  12  3   3   3   12  12  12  9   9   9   8
Mix hgt (kft)...1.2 1.2 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.N   N   N   N   N   SE  SE  SE  SE  SE  SE  E
Transp wind spd.6   6   6   6   6   5   5   5   5   5   5   3

.THURSDAY...

Sky/weather.........Sunny.
CWR.................2 percent.
Max temperature.....68-76.
Min humidity........42-51 percent.
Wind (20 ft)........East winds 5 to 7 mph in the morning...becoming
                    variable 2 to 4 mph, then...becoming west
                    around 5 mph early in the afternoon.
Mixing height.......300-400 ft AGL increasing to 3000 ft AGL late
                    in the morning, then increasing to 5400 ft AGL
                    early in the afternoon decreasing to 2800 ft
                    AGL late in the afternoon.
Transport winds.....East around 3 mphwest 5 to 6 mph late in the
                    morning.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17  17  7   7   7   3   3   3   8   8   8   17
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............54  54  55  59  63  67  70  72  72  72  71  69
RH..............63  64  63  60  54  50  47  46  47  49  53  58
20 FT wind dir..E   E   E   E   E   SW  SW  SW  W   W   W   W
20 FT wind spd..6   6   5   5   5   3   3   3   5   5   5   5
20 FT wind gust.8   8   8   8   8   5   5   5   10  10  10  10
Mix hgt (kft)...0.4 0.4 0.3 0.3 0.3 3.0 3.0 3.0 5.4 5.4 5.4 2.8
Transp wind dir.E   E   E   E   E   W   W   W   W   W   W   W
Transp wind spd.3   3   3   3   3   6   6   6   6   6   6   5

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Clear. Lows in the lower to mid 50s. Highs 70 to 81. Winds
generally less than 5 mph.
.SATURDAY...
Mostly clear. Lows in the mid to upper 50s. Highs 73 to 85. Winds
generally less than 5 mph.
.SUNDAY...
Mostly clear. Lows in the mid to upper 50s. Highs 73 to 84. Winds
generally less than 5 mph.

$$
Forecaster...Swafford
Requested by...Collin Ewing
Type of request...WILDFIRE
.TAG 2621732.2/EKA
.DELDT 09/15/26
.EMAIL 2026.mp18.plans@firenet.gov