375
FNUS76 KEKA 121238
FWSEKA

Spot Forecast for MP 18 Fire...NCIMT
National Weather Service Eureka CA
538 AM PDT Sat Sep 12 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...Cooler weather returns this weekend as a trough
moves over the area. A weak front today will bring a chance
for rain. The chance for any measurable rain stands at around 50%
and will likely be spotty and only over portions of the fire, if
any. The chance for wetting rain is around 30%, although this will
be only if a strong shower briefly moves overhead. The highest
chances for rain will be late this afternoon and into the evening.
Gusty west winds are also likely today with gusts up to 20 mph.
A warming trend back to near- normal arrives early next week and
dry weather is expected for the next upcoming week.


.TODAY...

Sky/weather.........Partly cloudy then becoming sunny then becoming
                    partly cloudy then becoming mostly cloudy.
                    Chance of rain showers late in the afternoon.
CWR.................6 percent.
Max temperature.....58-66.
Min humidity........51-61 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph...shifting to the
                    west 8 to 15 mph late in the morning.
Mixing height.......200-1500 ft AGL increasing to 2500 ft AGL late
                    in the afternoon.
Transport winds.....Southwest 6 to 13 mph.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........27  27  25  25  25  13  13  13  41  41  41  65
Weather cov.....                                            CHC
Weather type....                                            RW
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   10
Temp............51  50  52  54  57  59  61  62  62  60  61  58
RH..............67  67  62  59  57  55  59  60  61  62  65  71
20 FT wind dir..NW  NW  W   W   W   W   W   W   W   W   W   W
20 FT wind spd..7   7   7   7   7   12  12  12  15  15  15  12
20 FT wind gust.9   9   8   8   8   14  14  14  21  21  21  15
Mix hgt (kft)...0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 1.5 1.5 1.5 2.5
Transp wind dir.SW  SW  SW  SW  SW  W   W   W   W   W   W   SW
Transp wind spd.6   6   6   6   6   13  13  13  13  13  13  10

.TONIGHT...

Sky/weather.........Mostly cloudy. Chance of rain showers until
                    early morning, then slight chance of rain
                    showers after midnight.
CWR.................6 percent.
Min temperature.....45-48.
Max humidity........78-88 percent.
Wind (20 ft)........West winds 5 to 12 mph...shifting to the south
                    5 to 8 mph late in the evening.
Mixing height.......600-2500 ft AGL decreasing to 200-300 ft AGL
                    after midnight.
Transport winds.....Southwest 3 to 10 mph.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65  65  63  63  63  70  70  70  61  61  61  60
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC SCH SCH SCH
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
CWR.............10  10  10  10  10  10  10  10  10  10  10  0
Temp............57  55  51  50  49  49  50  49  49  48  48  48
RH..............74  77  77  79  79  77  76  77  80  81  82  82
20 FT wind dir..W   W   SW  SW  SW  S   S   S   S   S   S   S
20 FT wind spd..12  12  7   7   7   8   8   8   5   5   5   5
20 FT wind gust.15  15  12  12  12  9   9   9   6   6   6   7
Mix hgt (kft)...2.5 2.5 1.1 1.1 1.1 0.6 0.6 0.6 0.2 0.2 0.2 0.3
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  S
Transp wind spd.10  10  10  10  10  7   7   7   7   7   7   3

.SUNDAY...

Sky/weather.........Mostly cloudy then becoming partly cloudy then
                    becoming sunny.
CWR.................1 percent.
Max temperature.....60-68.
Min humidity........50-60 percent.
Wind (20 ft)........South winds around 5 mph early in the
                    morning...becoming variable 2 to 5 mph,
                    then...becoming northwest 5 to 10 mph late in
                    the morning.
Mixing height.......200-300 ft AGL increasing to 2500-4200 ft AGL
                    late in the morning.
Transport winds.....South around 3 mph northwest 7 to 9 mph late in
                    the morning.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  60  29  29  29  8   8   8   7   7   7   7
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............47  46  48  50  54  57  60  62  63  63  63  61
RH..............81  81  76  73  68  64  63  59  55  57  61  65
20 FT wind dir..S   S   S   S   S   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..5   5   4   4   4   6   6   6   9   9   9   10
20 FT wind gust.7   7   6   6   6   8   8   8   13  13  13  15
Mix hgt (kft)...0.3 0.3 0.2 0.2 0.2 2.5 2.5 2.5 4.2 4.2 4.2 3.1
Transp wind dir.S   S   S   S   S   NW  NW  NW  NW  NW  NW  N
Transp wind spd.3   3   3   3   3   7   7   7   7   7   7   9

.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Clear. Lows in the mid to upper 40s. Highs 67 to 78. Winds
generally less than 5 mph.
.TUESDAY...
Clear. Lows in the lower 50s. Highs 71 to 83. Winds generally
less than 5 mph.
.WEDNESDAY...
Clear. Lows in the lower to mid 50s. Highs 75 to 87. Winds
generally less than 5 mph.

.OUTLOOK FOR THURSDAY SEPTEMBER 17 THROUGH MONDAY SEPTEMBER 21...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.

$$
Forecaster...Johnathon White
Requested by...Collin Ewing
Type of request...WILDFIRE
.TAG 2621385.4/EKA
.DELDT 09/12/26
.EMAIL 2026.mp18.plans@firenet.gov