Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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FNUS71 KBOX 271335
FWSBOX
Spot Forecast for ONSET HARVESTMOON FESTIVAL...DFS SPECIAL OPS
National Weather Service Boston/Norton MA
935 AM EDT Sat Sep 27 2025
Forecast is based on forecast start time of 1000 EDT on September 27.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
Dry weather is expected each day this weekend, with a chance for
showers between 9pm Saturday and 6 am Sunday. Highs with be in the
mid 70s with light winds.
.REST OF TODAY...
Sky/weather.........Mostly sunny.
Chance of pcpn......0 percent.
Chance of pcpn......0 percent.
Chance of pcpn......0 percent.
Chance of rain......0 percent.
Chance of thunder...0 percent.
Begin/end of pcpn...
Max temperature.....Around 76.
Min humidity........64 percent.
Max apparent temp...75.
Max apparent temp...75.
Max apparent temp...75.
Eye level winds.....Northeast winds around 4 mph shifting to the
east late in the afternoon.
Surface winds (mph).North winds around 6 mph shifting to the east 6
to 7 mph late in the afternoon.
Wind (20 ft)........North winds around 6 mph shifting to the east 6
to 7 mph late in the afternoon.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.00 inches.
Pcpn amount.........0.00 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......25 decreasing to 20 late in the afternoon.
Visibility..........9.
Water temperature...
Mixing height.......3100 ft AGL.
Transport winds.....North 6 to 9 mph shifting to the southeast
around 6 mph late in the afternoon.
Smoke dispersal.....Poor (9300 knot-ft) early in the morning
increasing to fair (17700 knot-ft) in the
afternoon.
LVORI...............3.
ADI.................14 to 25.
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........32 25 18 40 39 41 50 58
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0 0 0 0 0 0 0 0
Chc of rain (%).0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0
Temp............71 74 75 75 75 74 74 72
RH..............73 67 64 64 65 66 67 70
Heat index (F)..71 74 75 75 75 74 74 72
Wind chill (F)..71 74 75 75 75 74 74 72
Aparnt tmp (F)..71 74 75 75 75 74 74 72
20 FT wind dir..N NE NE NE NE E E SE
20 FT wind spd..6 7 7 7 6 7 6 7
20 FT wind gust.9 9 9 9 10 10 10 10
Eye lvl wnd dir.N NE NE NE NE E E SE
Eye lvl wnd spd.4 4 4 4 4 4 4 4
Eye lvl wnd gst.5 5 5 5 6 6 6 6
Surface wnd dir.N NE NE NE NE E E SE
Surface wnd spd.6 7 7 7 6 7 6 7
Surface wnd gst.9 9 9 9 10 10 10 10
Mix hgt (kft)...1.8 2.4 2.9 3.0 3.1 2.9 2.8 1.9
Transp wind dir.N N N N N N S SE
Transp wind spd.9 8 6 6 6 7 6 6
100 ft wind.....
LVORI...........3 3 3 3 3 3 3 3
ADI.............21 25 21 22 22 25 20 14
Vrate kt-ft/1K..14 17 15 15 16 18 14 9
Ventrate Cat....PR PR PR PR PR PR PR PR
Wave height (ft)0 0 0 0 0 0 0 0
Ceiling (kft)...25 25 25 25 25 25 25 20
Visibility (sm).9 9 9 9 9 9 9 9
Water temp......
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of showers after
midnight. Chance of showers early in the
morning.
Chance of pcpn......40 percent.
Chance of pcpn......40 percent.
Chance of pcpn......40 percent.
Chance of rain......46 percent.
Chance of thunder...1 percent.
Begin/end of pcpn...
Min temperature.....Around 61.
Max humidity........100 percent.
Max apparent temp...70.
Max apparent temp...70.
Max apparent temp...70.
Eye level winds.....Southeast winds up to 4 mph early in the
evening becoming light.
Surface winds (mph).South winds around 5 mph early in the evening
becoming light.
Wind (20 ft)........South winds around 5 mph early in the evening
becoming light.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.00 inches.
Pcpn amount.........0.00 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......25 decreasing to 9.0.
Visibility..........9.
Water temperature...
Mixing height.......500 ft AGL.
Transport winds.....South 6 to 8 mph.
Smoke dispersal.....Poor (2400 knot-ft).
LVORI...............6.
ADI.................3 to 7.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........64 71 79 84 78 87 83 90 93 94 96 94
Weather cov..... SCH SCH CHC CHC CHC
Weather type.... RW RW RW RW RW
Tstm cov........
Chc of pcpn (%).0 0 0 10 0 10 10 20 20 30 30 40
Chc of rain (%).0 0 0 0 0 10 20 20 20 40 50 40
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............70 68 66 64 64 64 64 63 63 63 63 63
RH..............75 81 87 93 93 97 97 97 97 97 93 97
Heat index (F)..70 68 66 64 64 64 64 63 63 63 63 63
Wind chill (F)..70 68 66 64 64 64 64 63 63 63 63 63
Aparnt tmp (F)..70 68 66 64 64 64 64 63 63 63 63 63
20 FT wind dir..SE SE SE S S S S S S S S S
20 FT wind spd..6 5 3 2 2 2 2 2 2 2 2 2
20 FT wind gust.9 9 9 8 7 7 7 7 7 7 7 7
Eye lvl wnd dir.SE SE SE S S S S S S S S S
Eye lvl wnd spd.4 3 2 1 1 1 1 1 1 1 1 1
Eye lvl wnd gst.5 5 5 5 4 4 4 4 4 4 4 4
Surface wnd dir.SE SE SE S S S S S S S S S
Surface wnd spd.6 5 3 2 2 2 2 2 2 2 2 2
Surface wnd gst.9 9 9 8 7 7 7 7 7 7 7 7
Mix hgt (kft)...0.9 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.S S S S S S S S S S SW S
Transp wind spd.6 7 8 7 8 7 6 6 6 7 6 6
100 ft wind.....
LVORI...........4 6 6 8 6 8 8 8 8 8 7 8
ADI.............7 5 4 3 4 3 3 3 3 3 3 3
Vrate kt-ft/1K..5 4 4 3 4 3 3 3 3 3 2 2
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0
Ceiling (kft)...25 25 25 20 20 20 15 11 10 10 9.0 9.0
Visibility (sm).9 9 9 9 9 9 9 10 10 10 10 10
Water temp......
$$
Forecaster...BRW
Requested by...L. ST LAURENT
Type of request...OTHER
.TAG 2522629.0/BOX
.DELDT 09/27/25
.FormatterVersion 2.0.0
.EMAIL DFSISU1@GMAIL.COM