528
FNAK72 PAFC 191340
FWSALU
SPOT FORECAST FOR FY 2026 KATMAI PILE BURNING...WILDLAND FIRE SERVICE (NPS)
NATIONAL WEATHER SERVICE ANCHORAGE AK
540 AM AKDT SAT SEP 19 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 AKDT ON SEPTEMBER 19.
DISCUSSION
CLOUDY AND COOL CONDITIONS WILL PERSIST THROUGH SUNDAY WITH
PERIODS OF RAIN SHOWERS. NORTHEAST WINDS OF 7 TO 10 MPH TODAY WILL
INCREASE THIS EVENING, BECOMING NORTH AT 15 TO 25 MPH OVERNIGHT.
NORTHERLY WINDS OF 15 TO 20 MPH CONTINUE SUNDAY WITH GUSTS AROUND
20 TO 25 MPH. MIN RH VALUES REMAIN ELEVATED NEAR 70 PERCENT
TODAY AND AROUND 75 PERCENT SUNDAY. MIXING HEIGHTS INCREASE TO
AROUND 1800 FT THIS AFTERNOON AND NEAR 2900 FT SUNDAY. PERIODS OF
RAIN SHOWERS ARE EXPECTED, WITH CHANCES INCREASING TONIGHT INTO
SUNDAY.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS IN THE MORNING, THEN CHANCE OF
RAIN SHOWERS IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 15 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF PCPN......40 PERCENT.
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........71 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 7 TO 10 MPH.
MIXING HEIGHT.......1800 FT AGL.
TRANSPORT WINDS.....NORTH 3 TO 10 MPH INCREASING TO AROUND 14 MPH
LATE IN THE AFTERNOON.
PCPN AMOUNT.........0.02 INCHES.
SNOWFALL AMOUNT.....0.0 INCHES.
TIME (AKDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........77 77 77 81 81 81 84 84 84 84 84
WEATHER COV.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW
CWR.............0 0 0 0 0 0 0 0 0 20 20
CHC OF PCPN (%).20 20 20 20 20 20 40 40 40 40 40
TEMP............38 38 39 40 43 45 47 48 49 50 50
RH..............99 99 99 99 95 89 80 76 74 71 72
20 FT WIND DIR..NE NE NE N N N NE NE NE NE NE
20 FT WIND SPD..7 7 7 10 10 10 9 9 9 10 10
20 FT WIND GUST. 13 13 13 16 16
MIX HGT (KFT)...0.4 0.4 0.4 1.7 1.7 1.7 1.7 1.7 1.7 1.8 1.8
TRANSP WIND DIR.N N N N N N N N N N N
TRANSP WIND SPD.3 3 3 7 7 7 10 10 10 14 14
TONIGHT
SKY/WEATHER.........CLOUDY (85-95 PERCENT). CHANCE OF RAIN SHOWERS
IN THE EVENING AND OVERNIGHT, THEN RAIN SHOWERS
LIKELY AFTER 3 AM.
CWR.................15 PERCENT INCREASING TO 31 PERCENT AFTER 3 AM.
CHANCE OF PCPN......60 PERCENT.
MIN TEMPERATURE.....AROUND 41.
MAX HUMIDITY........94 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 10 MPH SHIFTING TO THE
NORTH 16 TO 22 MPH IN THE EVENING AND
OVERNIGHT, THEN DECREASING TO AROUND 14 MPH
AFTER 3 AM.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....NORTH 13 TO 15 MPH.
PCPN AMOUNT.........0.05 INCHES.
SNOWFALL AMOUNT.....0.0 INCHES.
TIME (AKDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........84 85 85 85 88 88 88 89 89 89 93 93
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
CWR.............20 20 20 20 20 20 20 20 20 20 30 30
CHC OF PCPN (%).40 30 30 30 30 30 30 40 40 40 60 60
TEMP............48 48 47 46 45 45 44 44 44 44 43 42
RH..............77 80 85 89 90 91 92 93 92 91 92 92
20 FT WIND DIR..NE NE NE NE N N N N N N N N
20 FT WIND SPD..10 21 21 21 22 22 22 16 16 16 14 14
20 FT WIND GUST.16 17 17 17 18 18
MIX HGT (KFT)...1.8 1.8 1.8 1.8 0.7 0.7 0.7 0.7 0.7 0.7 1.0 1.0
TRANSP WIND DIR.N N N N N N N N N N N N
TRANSP WIND SPD.14 14 14 14 13 13 13 14 14 14 15 15
SUNDAY
SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN SHOWERS LIKELY IN
THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE
AFTERNOON.
CWR.................31 PERCENT.
CHANCE OF PCPN......60 PERCENT.
MAX TEMPERATURE.....AROUND 42.
MIN HUMIDITY........75 PERCENT.
WIND (20 FT)........NORTH WINDS 14 TO 18 MPH.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....NORTH 15 TO 17 MPH.
PCPN AMOUNT.........0.06 INCHES.
SNOWFALL AMOUNT.....0.0 INCHES.
TIME (AKDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........93 98 98 98 98 98 98 99 99 99 99 99
WEATHER COV.....LKY CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RN RN RN RW RW RW RW RW
CWR.............30 30 30 30 30 30 30 30 30 30 30 30
CHC OF PCPN (%).60 50 50 50 30 30 30 30 30 30 50 50
TEMP............41 41 41 41 41 41 41 41 42 42 42 42
RH..............92 93 94 94 92 89 84 80 77 75 75 77
20 FT WIND DIR..N N N N N N N N N N N N
20 FT WIND SPD..14 17 17 17 18 18 18 17 17 17 14 14
20 FT WIND GUST.18 18 18 18 20 20 20 20 20 20 21 21
MIX HGT (KFT)...1.0 1.0 1.0 1.0 1.9 1.9 1.9 1.9 1.9 1.9 2.9 2.9
TRANSP WIND DIR.N N N N N N N N N N NW NW
TRANSP WIND SPD.15 16 16 16 17 17 17 17 17 17 17 17
FORECASTER...METZLER
REQUESTED BY...NATHAN GILMORE
TYPE OF REQUEST...PRESCRIBED
.TAG 2622075.1/ALU
.DELDT 09/19/26
.FORMATTERVERSION 2.0.0
.EMAIL NATHAN_GILMORE@NPS.GOV
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