818
FNAK77 PAJK 211551
FWSAJK
SPOT FORECAST FOR CHATHAM/FREDERICK USCG...USCG
NATIONAL WEATHER SERVICE JUNEAU AK
751 AM AKDT TUE OCT 21 2025
FORECAST IS BASED ON FORECAST START TIME OF 0700 AKDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (907) 790-6824, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
AS OF 0730 TUESDAY MORNING WINDS OF STRONG BREEZES TO NEAR-GALES
ARE IMPACTING THE CENTRAL INSIDE CHANNELS. THE HUBBARD STATE FERRY
IS CURRENTLY TRANSITING SOUTH THROUGH CHATHAM STRAIT, HIGHLIGHTING
25 TO 30 KNOTS OF SOUTHERLY WIND. COASTAL BUOYS ARE ALSO
HIGHLIGHTING SIGNIFICANT SWELL OUT OF THE SOUTHWEST, NEAR 25FT AT
15 SECONDS.
MOVING THROUGH TUESDAY ANTICIPATING SOUTHERLY WINDS OF STRONG
BREEZES TO CONTINUE TO IMPACT CHATHAM STRAIT, WITH SIGNIFICANT
SWELL MAKING THE CHATHAM OCEAN ENTRANCE PARTICULARLY DANGEROUS
FROM LARGE AND CONFUSED SEAS.
TUESDAY EVENING A STORM FORCE LOW MOVES ALONG OUR COAST, WITH GALE
FORCE WINDS ENVELOPING MUCH OF THE INSIDE PASSAGE. LOOK FOR PEAK
SOUTHEASTERLY WINDS NEAR MIDNIGHT TONIGHT FOR CHATHAM AND
FREDERICK, WITH GUSTS REACHING 45 TO 50 KNOTS FOR A FEW HOURS.
FURTHERMORE, FRESH SEAS ASSOCIATED WITH THESE STRONG WINDS WILL BE
ABLE TO MOVE UP CHATHAM STRAIT, OUR CURRENT FORECAST HAS 10-15FT
FRESH SEAS TUESDAY NIGHT INTO WEDNESDAY MORNING FROM CAPE DECISION
TO PT. GARDNER.
WEDNESDAY ELEVATED SOUTHERLY WINDS CONTINUE, WITH SUSTAINED WINDS
OF STRONG BREEZES TO NEAR-GALE FORCE CONDITIONS.
ANOTHER GALE FORCE LOW MOVES INTO THE REGION THURSDAY.
TODAY
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN EARLY IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS IN THE
LATE MORNING AND EARLY AFTERNOON. RAIN SHOWERS
LATE IN THE AFTERNOON.
CHANCE OF PCPN......100 PERCENT.
MAX TEMPERATURE.....AROUND 46.
MIN HUMIDITY........91 PERCENT.
SURFACE WINDS (KTS).SOUTHWEST WINDS 10 TO 18 KNOTS SHIFTING TO THE
EAST AROUND 13 KNOTS LATE IN THE AFTERNOON.
WAVE HEIGHT.........4 FEET.
SEA SURFACE TEMP.... 42F
DEGREES FAHRENHEIT. RAINFALL AMOUNT.....0.20 INCHES.
TIME (AKDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........100 100 100 100 100 100 100 100 100 100 100
WEATHER COV.....DEF DEF DEF CHC CHC CHC CHC CHC CHC DEF DEF
WEATHER TYPE....RN RN RN RW RW RW RW RW RW RW RW
TSTM COV........
CHC OF PCPN (%).100 100 100 50 50 50 50 50 50 100 100
TEMP............45 44 44 44 44 43 43 45 43 43 43
RH..............93 95 94 93 97 97 98 97 97 100 96
SFC WND DIR.....SW SW SW S S S SE SE SE E E
SFC WND SPD KTS.18 18 18 11 11 11 12 12 12 13 13
SFC WND GST.....26 26 26 21 21 21 20 20 20 23 23
SWELL DIRECTION.N N N N N N N N N N N
SWELL HGT (FT)..0 0 0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)4 4 4 3 3 3 3 3 3 4 4
SST (F).........0 0 0 0 0 0 0 0 0 0 0
TONIGHT
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN SHOWERS EARLY IN
THE EVENING, THEN RAIN IN THE EVENING AND
OVERNIGHT. RAIN SHOWERS AFTER 3 AM.
CHANCE OF PCPN......100 PERCENT.
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........100 PERCENT.
SURFACE WINDS (KTS).BREEZY. EAST WINDS 13 TO 19 KNOTS WITH GUSTS TO
AROUND 30 KNOTS SHIFTING TO THE SOUTHEAST 10 TO
20 KNOTS WITH GUSTS TO AROUND 38 KNOTS IN THE
LATE EVENING AND OVERNIGHT.
WAVE HEIGHT.........10-15 FEET.
SEA SURFACE TEMP....42 DEGREES FAHRENHEIT.
RAINFALL AMOUNT.....1.36 INCHES.
TIME (AKDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........100 100 100 100 100 100 100 100 100 100 100 100
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF
WEATHER TYPE....RW RN RN RN RN RN RN RN RN RN RW RW
TSTM COV........
CHC OF PCPN (%).100 100 100 100 100 100 100 100 100 100 100 100
TEMP............43 44 43 44 43 43 43 43 43 43 44 43
RH..............96 93 92 91 93 91 90 92 93 96 95 96
SFC WND DIR.....E E E E SE SE SE SE SE SE SE SE
SFC WND SPD KTS.13 19 19 19 20 20 20 10 10 10 13 13
SFC WND GST.....23 30 30 30 38 38 38 34 34 34 28 28
SWELL DIRECTION.N N N N N N N N N N N N
SWELL HGT (FT)..0 0 0 0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)4 6 6 6 6 6 6 5 5 5 5 5
SST (F).........0 0 0 0 0 0 0 0 0 0 0 0
WEDNESDAY
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN SHOWERS.
CHANCE OF PCPN......100 PERCENT.
MAX TEMPERATURE.....AROUND 45.
MIN HUMIDITY........93 PERCENT.
SURFACE WINDS (KTS).SOUTHEAST WINDS 13 TO 21 KNOTS.
SWELL HEIGHT........NORTH SWELL 0 FEET.
WAVE HEIGHT.........6 FEET.
SEA SURFACE TEMP....0 DEGREES FAHRENHEIT.
RAINFALL AMOUNT.....0.66 INCHES.
TIME (AKDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........100 100 100 100 100 100 100 100 100 100 100 100
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........
CHC OF PCPN (%).100 100 100 100 100 100 100 100 100 100 100 100
TEMP............43 43 44 43 43 43 43 44 44 44 44 44
RH..............96 97 95 100 100 100 100 99 100 100 98 96
SFC WND DIR.....SE E E E SE SE SE S S S SE SE
SFC WND SPD KTS.13 17 17 17 21 21 21 18 18 18 17 17
SFC WND GST.....28 30 30 30 30 30 30 27 27 27 30 30
SWELL DIRECTION.N N N N N N N N N N N N
SWELL HGT (FT)..0 0 0 0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)5 5 5 5 6 6 6 6 6 6 5 5
SST (F).........0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...PARK
REQUESTED BY...USCG
TYPE OF REQUEST...MARINE
.TAG 2524069.0/AJK
.DELDT 10/20/25
.FORMATTERVERSION 2.0.0
.EMAIL SCCSOUTHEASTALASKA@USCG.MIL
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