FNAK52 PAFG 181226 FWFWCZ Fire Weather Planning Forecast for Western Alaska National Weather Service Fairbanks, AK 426 AM AKDT Mon May 18 2026 .DISCUSSION... Key Messages... - A low pressure system in the Bering Sea will bring rounds of showers across the West Coast as southerly flow continues to bring moisture inland. Overall accumulations should remain light with wetting rain chances unlikely through the week. - A low but non-zero chance of thunderstorms is possible during the afternoon/evening hours, today, in the Upper Kuskokwim Valley over areas of higher terrain. Thunderstorms could bring pockets of heavier rainfall and gusty outflow winds. - South/southeast winds will gradually weaken throughout the day with gusts of 15-25 mph possible before restrengthening again late tonight into Tuesday. - Min RH values will bottom out around 30% during the day in the Western Interior and around 40% in the YK Delta. Overnight recoveries will be in the 70-80% range with localized higher recoveries possible in areas of heavier precipitation. AKZ919-190630- Upper Kobuk Valleys- Including the cities of Ambler, Shungnak, and Kobuk 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (80%) Pcldy (60%) Pcldy (40%) Precip Type Showers Showers Showers Chance Precip (%) 50 40 10 CWR 30 10 0 CWR25 10 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 64 (+1) 39 (-3) 66 RH % (24h trend) 38 (+5) 87 (+1) 34 Wind 20ft/early(mph) SE 4-8 G20 S 3-7 E 4-8 G18 Wind 20ft/late(mph) S 6-10 G20 Lgt/Var SE 8-12 G26 Mixing Hgt(ft-agl) 4600 400 6400 Transport Wnd (mph) SW 9 NE 7 SE 15 Vent Rate (mph-ft) 41400 2800 96000 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s. East winds 5 to 10 mph. .THURSDAY...Mostly cloudy. Lows around 40. Highs in the lower 60s. Northeast winds around 5 mph. .FRIDAY...Mostly cloudy with a chance of rain showers. Lows in the lower 40s. Highs in the upper 50s. Northeast winds around 10 mph. $$ AKZ928-190630- Lower Koyukuk Valley- Including the cities of Huslia and Hughes 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Pcldy (70%) Pcldy (60%) Pcldy (40%) Precip Type Showers Showers Showers Chance Precip (%) 0 10 10 CWR 0 0 0 CWR25 0 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 61 (0) 38 (-3) 61 RH % (24h trend) 33 (-2) 78 (-2) 35 Wind 20ft/early(mph) S 4-8 G20 Lgt/Var E 3-7 G24 Wind 20ft/late(mph) S 5-9 G20 Lgt/Var SE 9-13 G31 Mixing Hgt(ft-agl) 5600 400 6500 Transport Wnd (mph) S 10 E 7 SE 15 Vent Rate (mph-ft) 56000 2800 97500 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. Lows around 40. Highs in the mid 50s. Southeast winds around 5 mph. .THURSDAY...Mostly cloudy. Lows around 40. Highs in the mid 50s. Northeast winds around 5 mph. .FRIDAY...Mostly cloudy. A chance of rain and snow showers. Lows in the lower 40s. Highs in the mid 50s. East winds around 5 mph. $$ AKZ929-190630- Middle Yukon Valley- Including the cities of Galena, Nulato, Kaltag, Ruby, and Koyukuk 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (70%) Pcldy (50%) Pcldy (60%) Precip Type Showers Showers Showers Chance Precip (%) 10 10 20 CWR 0 0 0 CWR25 0 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 59 (+3) 36 (-4) 58 RH % (24h trend) 35 (-3) 83 (-1) 37 Wind 20ft/early(mph) S 4-8 G17 SE 3-7 G17 E 5-9 G25 Wind 20ft/late(mph) S 4-8 G18 Lgt/Var SE 9-13 G28 Mixing Hgt(ft-agl) 5400 400 5800 Transport Wnd (mph) S 12 E 8 SE 15 Vent Rate (mph-ft) 64800 3200 87000 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. A chance of snow showers. Lows in the upper 30s. Highs in the lower 50s. Southeast winds around 5 mph. .THURSDAY...Mostly cloudy. Lows in the upper 30s. Highs in the lower 50s. North winds around 5 mph. .FRIDAY...Mostly cloudy. A chance of rain and snow showers. Lows in the upper 30s. Highs in the lower 50s. East winds around 5 mph. $$ AKZ926-190630- Lower Yukon River- Including the cities of Russian Mission, St Marys, Pilot Station, and Marshall 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (80%) Mcldy (80%) Mcldy (80%) Precip Type Showers Showers Showers Chance Precip (%) 30 80 50 CWR 10 0 10 CWR25 0 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 53 (+4) 34 (-1) 51 RH % (24h trend) 57 (-5) 92 (0) 58 Wind 20ft/early(mph) E 5-9 G19 SE 4-8 G17 E 12-16 G32 Wind 20ft/late(mph) SE 6-10 G20 E 6-10 G25 SE 13-17 G29 Mixing Hgt(ft-agl) 3800 600 3900 Transport Wnd (mph) SE 13 SE 9 S 20 Vent Rate (mph-ft) 49400 5400 78000 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy with rain showers likely and a chance of snow showers. Lows in the mid 30s. Highs in the upper 40s. Southeast winds around 10 mph. .THURSDAY...Cloudy with a chance of rain and snow showers. Lows in the upper 30s. Highs in the upper 40s. East winds 10 to 15 mph. .FRIDAY...Rain showers. Lows in the mid 30s. Highs in the upper 40s. Southeast winds 10 to 15 mph. $$ AKZ930-190630- Lower Yukon and Innoko Valleys- Including the cities of Grayling, Holy Cross, Shageluk, and Anvik 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (70%) Pcldy (60%) Mcldy (80%) Precip Type Showers Showers Showers Chance Precip (%) 10 60 30 CWR 0 0 0 CWR25 0 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 56 (+4) 36 (-2) 54 RH % (24h trend) 43 (-4) 91 (+2) 47 Wind 20ft/early(mph) SE 4-8 G23 SE 6-10 G24 E 8-12 G29 Wind 20ft/late(mph) SE 7-11 G23 E 4-8 G21 SE 11-15 G32 Mixing Hgt(ft-agl) 5100 400 5600 Transport Wnd (mph) SE 17E 10 S 17 Vent Rate (mph-ft) 86700 4000 95200 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. A chance of rain and snow showers. Lows in the mid 30s. Highs in the lower 50s. East winds 5 to 10 mph. .THURSDAY...Mostly cloudy with a chance of rain showers. Lows in the upper 30s. Highs around 50. East winds 5 to 10 mph. .FRIDAY...Mostly cloudy with rain showers likely. Lows in the upper 30s. Highs around 50. Southeast winds around 10 mph. $$ AKZ952-190630- Upper Kuskokwim Valley- Including the cities of McGrath, Nikolai, and Takotna 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (80%) Pcldy (50%) Mcldy (80%) Precip Type Showers Tstms Showers Chance Precip (%) 10 20 10 CWR 0 0 0 CWR25 0 0 0 Chance of Thunder (%) None (0) Iso (10) None (0) Temp (24h trend) 60 (+7) 36 (-1) 58 RH % (24h trend) 34 (-5) 90 (0) 38 Wind 20ft/early(mph) Lgt/Var SE 3-7 G23 E 3-7 G25 Wind 20ft/late(mph) SE 4-8 G23 Lgt/Var S 8-12 G29 Mixing Hgt(ft-agl) 5700 400 5500 Transport Wnd (mph) S 15 E 9 S 17 Vent Rate (mph-ft) 85500 3600 93500 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. A chance of rain and snow showers. Lows in the mid 30s. Highs in the mid 50s. Southeast winds around 5 mph. .THURSDAY...Mostly cloudy. Lows in the upper 30s. Highs in the lower 50s. Northeast winds around 5 mph. .FRIDAY...Mostly cloudy with a chance of rain showers. Lows in the upper 30s. Highs in the lower 50s. Southeast winds around 5 mph. $$ AKZ951-190630- North Slopes of the Western Alaska Range- Including the city of Farewell Lake 426 AM AKDT Mon May 18 2026 Today Tonight Tue Cloud Cover Mcldy (70%) Pcldy (50%) Mcldy (80%) Precip Type Showers Showers Showers Chance Precip (%) 10 0 20 CWR 0 0 10 CWR25 0 0 0 Chance of Thunder (%) None (0) None (0) None (0) Temp (24h trend) 58 (+7) 33 (-2) 56 RH % (24h trend) 33 (-5) 78 (-7) 36 Wind 20ft/early(mph) Lgt/Var SE 6-10 G32 SE 7-11 G42 Wind 20ft/late(mph) SE 5-9 G26 SE 6-10 G39 S 8-12 G36 Mixing Hgt(ft-agl) 5000 400 5100 Transport Wnd (mph) S 10 SE 13 S 16 Vent Rate (mph-ft) 50000 5200 81600 Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly cloudy. A chance of snow showers. Lows in the mid 30s. Highs in the lower 50s. Southeast winds around 5 mph. .THURSDAY...Mostly cloudy. Lows in the mid 30s. Highs around 50. East winds around 5 mph. .FRIDAY...Mostly cloudy with a chance of rain and snow showers. Lows in the mid 30s. Highs in the upper 40s. Southeast winds 5 to 10 mph. $$