069
FNUS71 KBOX 191311
FWSBOX
SPOT FORECAST FOR BOSTON MOORING...US COAST GUARD
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
911 AM EDT TUE AUG 19 2025
FORECAST IS BASED ON FORECAST START TIME OF 0900 EDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
SHOWERS FROM WEDNESDAY NIGHT WILL BE DIMINISHING BY EARLY THURSDAY
MORNING AND THE REST OF THE FORECAST REMAINS DRY. WINDS ON
THURSDAY WILL BE OUT OF THE EAST 8 TO 15 KTS WITH GUSTS TO 20 KTS.
WINDS WILL DIMINISH A THURSDAY NIGHT THEN INCREASE AGAIN ON FRIDAY
GUSTING TO 18 TO 23 KTS. WAVE HEIGHTS WILL BE 1 TO 2 FEET
THROUGHOUT.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY.
CHANCE OF THUNDER...2 PERCENT.
CHANCE OF LIGHTNING.2 PERCENT.
BEGIN/END OF PCPN...
MAX TEMPERATURE.....AROUND 66.
SURFACE WINDS (KTS).NORTHEAST WINDS 8 TO 12 KNOTS.
WIND SHIFT..........
WAVE HEIGHT.........1 TO 2.
WAVE PERIOD.........0 SECONDS.
FREEZING SPRAY......NONE.
SEA SURFACE TEMP....MISSING.
PCPN AMOUNT.........0.01 INCHES.
CEILING (KFT).......9.0 INCREASING TO 10 IN THE AFTERNOON.
VISIBILITY..........9.
SUNSET..............
TIDES...............
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....NORTHEAST 14 TO 17 MPH.
SMOKE DISPERSAL.....FAIR (20900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (51200 KNOT-FT) IN THE
AFTERNOON.
LVORI...............5.
ADI.................1 TO 41.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........34 32 31 31 30 30 30 31 31
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0
TEMP............62 62 63 63 62 62 62 63 63
SFC WND DIR.....NE NE NE NE E E E NE NE
SFC WND SPD KTS.8 9 10 11 12 12 12 12 12
SFC WND GST.....14 15 17 18 20 20 20 20 20
MIX HGT (KFT)...1.7 2.2 2.7 3.0 3.3 3.4 3.4 3.2 2.8
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.14 15 16 17 17 17 17 17 17
LVORI...........4 4 4 4 6 6 6 6 6
ADI.............25 30 36 41 1 1 1 1 1
VRATE KT-FT/1K..21 29 37 44 49 51 51 47 42
VENTRATE CAT....PR PR PR FR FR FR FR FR FR
WAVE PERIOD (S).0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)0 0 0 0 0 0 0 0 0
FREEZING SPRAY..
SST (F).........M M M M M M M M M
CEILING (KFT)...9.0 9.0 9.2 9.6 10 11 10 10 12
VISIBILITY (SM).9 9 9 9 9 9 9 9 9
THURSDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
BEGIN/END OF PCPN...
MIN TEMPERATURE.....AROUND 59.
SURFACE WINDS (KTS).NORTHEAST WINDS 9 TO 11 KNOTS.
WIND SHIFT..........
WAVE HEIGHT.........1 TO 2 FEET.
WAVE PERIOD.........0 SECONDS.
FREEZING SPRAY......NONE.
SEA SURFACE TEMP....MISSING.
PCPN AMOUNT.........0.00 INCHES.
CEILING (KFT).......15 INCREASING TO 25.
VISIBILITY..........9.
SUNRISE.............
TIDES...............
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....NORTHEAST 16 TO 18 MPH.
SMOKE DISPERSAL.....GOOD (35000 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (12400 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............4.
ADI.................11 TO 36.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........33 34 36 36 35 35 36 37 38 37 37 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............63 63 63 63 62 62 62 62 62 62 61 61
SFC WND DIR.....NE NE NE NE NE NE NE NE NE NE N N
SFC WND SPD KTS.11 10 9 9 9 9 9 9 9 9 9 9
SFC WND GST.....18 16 15 14 14 14 14 14 14 15 15 16
MIX HGT (KFT)...2.3 1.7 1.2 1.0 0.9 0.9 0.9 0.9 1.0 0.9 0.9 1.0
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.17 18 18 17 17 16 16 16 16 16 16 16
LVORI...........3 3 4 4 4 5 5 4 4 4 4 4
ADI.............36 32 12 12 12 11 11 11 11 11 11 11
VRATE KT-FT/1K..35 27 19 15 13 12 12 13 14 13 13 15
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
WAVE PERIOD (S).0 0 0 0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)0 0 0 0 0 0 0 0 0 0 0 0
FREEZING SPRAY..
SST (F).........M M M M M M M M M M M M
CEILING (KFT)...15 19 22 23 23 23 23 24 25 25 25 25
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
FRIDAY
SKY/WEATHER.........SUNNY.
CHANCE OF THUNDER...2 PERCENT.
CHANCE OF LIGHTNING.2 PERCENT.
BEGIN/END OF PCPN...
MAX TEMPERATURE.....AROUND 70.
SURFACE WINDS (KTS).NORTHEAST WINDS 9 TO 12 KNOTS.
WIND SHIFT..........
WAVE HEIGHT.........LESS THAN 1 FOOT.
WAVE HEIGHT.........LESS THAN 1 FOOT.
WAVE PERIOD.........0 SECONDS.
FREEZING SPRAY......NONE.
SEA SURFACE TEMP....MISSING.
PCPN AMOUNT.........0.00 INCHES.
CEILING (KFT).......23 DECREASING TO 17.
VISIBILITY..........9.
SUNSET..............
TIDES...............
MIXING HEIGHT.......4300 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 23 MPH DECREASING TO AROUND 13
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (20900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (81500 KNOT-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................1 EARLY IN THE MORNING INCREASING TO 59 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........37 37 38 34 29 25 22 20 17 14 11 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............61 61 61 63 64 66 66 66 66 66 67 67
SFC WND DIR.....N N N N NE NE NE NE NE NE NE NE
SFC WND SPD KTS.9 10 10 11 11 12 12 12 12 12 12 11
SFC WND GST.....16 16 17 18 21 22 22 22 22 22 21 20
MIX HGT (KFT)...1.4 1.9 2.4 2.9 3.5 3.9 4.2 4.3 4.1 3.8 3.3 2.6
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.17 20 21 22 23 23 23 22 20 17 15 13
LVORI...........4 4 4 3 3 4 4 4 4 4 4 3
ADI.............27 36 44 52 59 1 1 1 1 1 1 28
VRATE KT-FT/1K..21 31 43 56 69 78 82 79 71 58 43 29
VENTRATE CAT....PR PR FR FR GD GD GD GD GD FR FR PR
WAVE PERIOD (S).0 0 0 0 0 0 0 0 0 0 0 0
WAVE HEIGHT (FT)0 0 0 0 0 0 0 0 0 0 0 0
FREEZING SPRAY..
SST (F).........M M M M M M M M M M M M
CEILING (KFT)...25 25 24 24 24 24 24 23 23 21 19 17
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
FORECASTER...BRW
REQUESTED BY...ENS RONAN STONE
TYPE OF REQUEST...SAR
.TAG 2520218.0/BOX
.DELDT 08/19/25
.FORMATTERVERSION 2.0.0
.EMAIL RONAN.C.STONE@USCG.MIL
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