574
FNUS76 KEKA 152225 AAA
FWSEKA

Spot Forecast for MP 18 Fire...UPDATED
National Weather Service Eureka CA
325 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 to 15 percent chance Wednesday
afternoon or evening. There is the potential for showers into the
overnight hours. Cooler weather and a stray shower is possible
Thursday. Warmer and drier is expected for the Friday and into the
weekend.

Note: Corrected due to erronous winds in 3 to 5 day outlooks.

.REST OF TODAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Max temperature.....71-79.
Min humidity........30-40 percent.
Wind (20 ft)........West winds 5 to 9 mph.
Mixing height.......1600-2000 ft AGL.
Transport winds.....West around 7 mph.

TIME (PDT)      4PM 5PM
Sky (%).........18  17
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0
Temp............72  69
RH..............46  52
20 FT wind dir..W   W
20 FT wind spd..9   9
20 FT wind gust.12  13
Mix hgt (kft)...2.5 1.6
Transp wind dir.W   W
Transp wind spd.7   7

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Min temperature.....Around 50.
Max humidity........72-82 percent.
Wind (20 ft)........Northwest winds 5 to 9 mph decreasing to 5 to 7
                    mph late in the evening.
Mixing height.......Dropping to 300-400 ft AGL.
Transport winds.....West around 7 mph becoming north around 5 mph late in the
                    evening.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........17  17  15  15  15  7   7   7   11  11  11  9
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............67  64  57  55  54  53  53  52  51  51  50  50
RH..............56  64  69  69  69  70  71  71  73  75  77  77
20 FT wind dir..W   W   NW  NW  NW  N   N   N   NW  NW  NW  N
20 FT wind spd..9   9   6   6   6   6   6   6   6   6   6   6
20 FT wind gust.13  13  8   8   8   8   8   8   8   8   8   8
Mix hgt (kft)...1.6 1.6 0.4 0.4 0.4 0.4 0.4 0.4 0.3 0.3 0.3 0.4
Transp wind dir.W   W   W   W   W   N   N   N   N   N   N   NE
Transp wind spd.7   7   7   7   7   5   5   5   5   5   5   5

.WEDNESDAY...

Sky/weather.........Sunny then becoming partly cloudy. Slight
                    chance of rain showers late in the morning.
                    Slight chance of thunderstorms in the
                    afternoon.
CWR.................0 percent increasing to 10 percent late in the
                    afternoon.
Max temperature.....68-76.
Min humidity........40-50 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
                    in the afternoon.
Mixing height.......200-400 ft AGL increasing to 2000-2500 ft AGL
                    late in the morning.
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

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly clear. Slight chance of showers and thunderstorms. Lows in
the lower to mid 50s. Highs 66 to 78. Winds generally less than
5 mph.
.FRIDAY...
Clear. Lows in the lower to mid 50s. Highs 70 to 81. Northeast
winds 5 to 10 mph.
.SATURDAY...
Mostly clear. Lows in the mid to upper 50s. Highs 73 to 85. Winds
generally less than 5 mph.

.OUTLOOK FOR SUNDAY SEPTEMBER 20 THROUGH THURSDAY SEPTEMBER 24...
FOR NW CALIF...ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.

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