National Weather Service Text Product
AFOS product FWSBOX
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Product Timestamp: 2025-09-23 21:36 UTC
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584
FNUS71 KBOX 232136
FWSBOX
Spot Forecast for Special Weather Request...MEMA
National Weather Service Boston/Norton MA
536 PM EDT Tue Sep 23 2025
Forecast is based on forecast start time of 0000 EDT on September 25.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
Thursday will feature mainly cloudy skies with periods of rain in
the morning, becoming more intermittent during the afternoon.
Intermittent showers will give way to a chance for thunderstorms
mainly between 4 and 9pm. High temperatures rise into the lower
70s. East winds in the morning become southerly during the
afternoon. Wind speeds will be between 5 and 7 mph with gusts as
high as 16 mph.
Chances for showers and thunderstorms decrease Thursday night
with low temperatures falling into the upper 50s. A warming and
drying trend on Friday with any lingering shower or drizzle
activity coming to an end by daybreak. Clouds will be slow to
clear throughout the day, but expect partly cloudy skies by the
afternoon. Winds gradually shifting to the west between 6 and 8
mph with gusts as high as 16 mph. High temperatures climb into the
mid and upper 70s.
.THURSDAY...
Sky/weather.........Cloudy. Patchy fog through the night. Chance of
rain showers. Rain showers likely early in the
morning.
Chance of pcpn......70 percent.
Chance of pcpn......70 percent.
Chance of pcpn......70 percent.
Chance of rain......73 percent.
Chance of thunder...14 percent.
Begin/end of pcpn...
Min temperature.....Around 58.
Max humidity........100 percent.
Max apparent temp...60.
Max apparent temp...60.
Max apparent temp...60.
Eye level winds.....Northeast winds around 3 mph becoming light,
then becoming east around 3 mph early in the
morning.
Surface winds (mph).Northeast winds around 5 mph becoming light,
then becoming east around 5 mph early in the
morning.
Wind (20 ft)........Northeast winds around 5 mph becoming light,
then becoming east around 5 mph early in the
morning.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.11 inches.
Pcpn amount.........0.11 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......0.4.
Visibility..........2.70 decreasing to 1.57.
Water temperature...
Mixing height.......500 ft AGL.
Transport winds.....East 8 to 10 mph.
Smoke dispersal.....Poor (3700 knot-ft).
LVORI...............9.
ADI.................4 to 7.
TIME (EDT) MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........92 90 89 90 92 93
Weather cov.....CHC CHC LKY LKY LKY LKY
Weather type....RW RW RW RW RW RW
Tstm cov........
Chc of pcpn (%).50 50 60 60 60 70
Chc of rain (%).70 70 70 60 60 50
Chc of thdr (%).10 10 10 10 10 10
Temp............60 60 60 60 59 59
RH..............99 97 96 97 99 100
Heat index (F)..60 60 60 60 59 59
Wind chill (F)..60 60 60 60 59 59
Aparnt tmp (F)..60 60 60 60 59 59
20 FT wind dir..NE NE NE NE E E
20 FT wind spd..5 3 3 3 5 5
20 FT wind gust.8 8 8 8 8 9
Eye lvl wnd dir.NE NE NE NE E E
Eye lvl wnd spd.3 2 2 2 3 3
Eye lvl wnd gst.5 5 5 5 5 5
Surface wnd dir.NE NE NE NE E E
Surface wnd spd.5 3 3 3 5 5
Surface wnd gst.8 8 8 8 8 9
Mix hgt (kft)...0.6 0.5 0.5 0.5 0.5 0.5
Transp wind dir.NE E E E E E
Transp wind spd.10 10 10 9 9 8
100 ft wind.....
LVORI...........9 8 8 8 9 9
ADI.............7 5 5 4 6 5
Vrate kt-ft/1K..5 5 5 4 4 4
Ventrate Cat....PR PR PR PR PR PR
Wave height (ft)0 0 0 0 0 0
Ceiling (kft)...0.4 0.4 0.4 0.4 0.4 0.4
Visibility (sm).2.9 2.8 2.7 2.3 1.9 1.6
Water temp......
.THURSDAY...
Sky/weather.........Cloudy. Rain showers likely through early
afternoon. Rain showers and slight chance of
thunderstorms late in the afternoon. Patchy fog
early in the morning.
Chance of pcpn......80 percent.
Chance of pcpn......80 percent.
Chance of pcpn......80 percent.
Chance of rain......68 percent.
Chance of thunder...16 percent.
Begin/end of pcpn...
Max temperature.....Around 71.
Min humidity........97 percent.
Max apparent temp...68.
Max apparent temp...68.
Max apparent temp...68.
Eye level winds.....East winds around 3 mph shifting to the south
around 4 mph late in the afternoon.
Surface winds (mph).East winds around 5 mph shifting to the
southeast 6 to 7 mph early.
Wind (20 ft)........East winds around 5 mph shifting to the
southeast 6 to 7 mph early. Gusty and erratic
winds expected near thunderstorms late in the
afternoon.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.47 inches.
Pcpn amount.........0.47 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......0.4 increasing to 0.5 late in the morning, then
increasing to 0.6 early decreasing to 0.5 late
in the afternoon.
Visibility..........1.61 increasing to 2.19 early, then decreasing
to 1.09 late in the morning increasing to 5
decreasing to 3.
Water temperature...
Mixing height.......1700 ft AGL.
Transport winds.....East 7 to 9 mph shifting to the south 12 to 17
mph in the late morning and afternoon.
Smoke dispersal.....Poor (3400 knot-ft) early in the morning
increasing to fair (25900 knot-ft) in the
afternoon.
LVORI...............10.
ADI.................1 to 5.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........92 90 89 89 90 90 90 91 91 90 89 88
Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY DEF DEF DEF DEF
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH
Chc of pcpn (%).70 70 70 70 70 70 70 70 80 80 80 80
Chc of rain (%).50 50 50 50 50 50 50 50 60 60 70 70
Chc of thdr (%).10 10 10 10 10 10 10 10 20 20 20 20
Temp............59 60 61 63 64 66 67 68 68 68 68 68
RH..............100 100 100 100 100 100 100 100 100 100 100 100
Heat index (F)..59 60 61 63 64 66 67 68 68 68 68 68
Wind chill (F)..59 60 61 63 64 66 67 68 68 68 68 68
Aparnt tmp (F)..59 60 61 63 64 66 67 68 68 68 68 68
20 FT wind dir..E E E E SE SE SE SE S S S S
20 FT wind spd..5 5 5 5 6 6 7 7 6 7 7 7
20 FT wind gust.9 10 10 12 13 14 15 15 16 16 16 15
Eye lvl wnd dir.E E E E SE SE SE SE S S S S
Eye lvl wnd spd.3 3 3 3 4 4 4 4 4 4 4 4
Eye lvl wnd gst.5 6 6 7 8 8 9 9 10 10 10 9
Surface wnd dir.E E E E SE SE SE SE S S S S
Surface wnd spd.5 5 5 5 6 6 7 7 6 7 7 7
Surface wnd gst.9 10 10 12 13 14 15 15 16 16 16 15
Mix hgt (kft)...0.5 0.5 0.6 0.6 0.7 0.9 1.2 1.5 1.7 1.7 1.5 1.3
Transp wind dir.E E E SE SE S S S S S S S
Transp wind spd.8 7 8 9 12 14 15 16 17 17 16 16
100 ft wind.....
LVORI...........9 10 10 10 10 10 10 10 10 10 10 10
ADI.............5 1 1 1 1 1 1 1 1 1 1 1
Vrate kt-ft/1K..3 4 4 5 8 11 16 22 26 25 22 18
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)...0.4 0.4 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.6 0.5 0.5
Visibility (sm).1.6 1.9 2.2 1.1 5 3 3 3 3 3 3 3
Water temp......
.THURSDAY NIGHT...
Sky/weather.........Mostly cloudy. Showers and slight chance of
thunderstorms in the evening, then showers
likely after midnight.
Chance of pcpn......80 percent.
Chance of pcpn......80 percent.
Chance of pcpn......80 percent.
Chance of rain......75 percent.
Chance of thunder...17 percent.
Begin/end of pcpn...
Min temperature.....Around 62.
Max humidity........100 percent.
Max apparent temp...68.
Max apparent temp...68.
Max apparent temp...68.
Eye level winds.....South winds around 4 mph shifting to the
southwest after midnight.
Surface winds (mph).Southwest winds around 6 mph.
Wind (20 ft)........Southwest winds around 6 mph. Gusty and erratic
winds expected near thunderstorms in the
evening.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.38 inches.
Pcpn amount.........0.38 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......0.5 decreasing to less than 0.1, then
increasing to 0.9 after midnight increasing to
5.3 early in the morning increasing to 9.0
increasing to 10 early in the morning.
Visibility..........3 increasing to 9.
Water temperature...
Mixing height.......500 ft AGL.
Transport winds.....Southwest 12 to 16 mph shifting to the west
around 12 mph early in the morning.
Smoke dispersal.....Fair (15000 knot-ft) early in the evening
decreasing to poor (4900 knot-ft) late in the
night.
LVORI...............8.
ADI.................1 to 11.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........90 91 93 93 92 91 89 87 85 80 76 71
Weather cov.....DEF DEF DEF DEF DEF DEF LKY LKY LKY LKY LKY CHC
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........SCH SCH SCH SCH SCH
Chc of pcpn (%).80 80 80 80 80 80 70 70 70 60 60 50
Chc of rain (%).70 70 60 70 70 80 80 70 70 60 60 50
Chc of thdr (%).20 20 20 20 20 10 10 10 0 0 0 0
Temp............68 68 68 68 67 67 67 66 66 65 65 64
RH..............99 97 97 98 99 100 99 98 97 97 99 100
Heat index (F)..68 68 68 68 67 67 67 66 66 65 65 64
Wind chill (F)..68 68 68 68 67 67 67 66 66 65 65 64
Aparnt tmp (F)..68 68 68 68 67 67 67 66 66 65 65 64
20 FT wind dir..S S S S SW SW SW SW SW SW SW SW
20 FT wind spd..6 6 6 6 6 6 6 6 6 6 6 6
20 FT wind gust.15 13 12 12 10 10 10 10 10 10 10 12
Eye lvl wnd dir.S S S S SW SW SW SW SW SW SW SW
Eye lvl wnd spd.4 4 4 4 4 4 4 4 4 4 4 4
Eye lvl wnd gst.9 8 7 7 6 6 6 6 6 6 6 7
Surface wnd dir.S S S S SW SW SW SW SW SW SW SW
Surface wnd spd.6 6 6 6 6 6 6 6 6 6 6 6
Surface wnd gst.15 13 12 12 10 10 10 10 10 10 10 12
Mix hgt (kft)...1.1 0.9 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.6
Transp wind dir.S S SW SW SW SW SW SW SW W W W
Transp wind spd.16 16 16 15 15 14 13 13 12 12 12 12
100 ft wind.....
LVORI...........10 6 6 8 8 8 8 8 6 6 8 8
ADI.............1 11 11 10 10 9 8 8 8 8 8 8
Vrate kt-ft/1K..15 12 10 8 8 7 7 6 6 5 5 6
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)...0.5 0.5 0.5 0.5 0.5 0.5 0.0 0.0 0.9 5.3 9.0 10
Visibility (sm).3 3 3 3 3 3 3 5 5 5 5 9
Water temp......
.FRIDAY...
Sky/weather.........Partly sunny. Chance of showers through early
afternoon, then slight chance of showers late
in the afternoon.
Chance of pcpn......50 percent.
Chance of pcpn......50 percent.
Chance of pcpn......50 percent.
Chance of rain......47 percent.
Chance of thunder...13 percent.
Begin/end of pcpn...
Max temperature.....Around 77.
Min humidity........74 percent.
Max apparent temp...75.
Max apparent temp...75.
Max apparent temp...75.
Eye level winds.....West winds around 4 mph.
Surface winds (mph).West winds 6 to 7 mph.
Wind (20 ft)........West winds 6 to 7 mph.
100 FT WIND.........
Wave height.........Less than 1 foot.
Rainfall amount.....0.04 inches.
Pcpn amount.........0.04 inches.
Snowfall amount.....0.0 inches.
CEILING (KFT).......9.9 decreasing to 4.9 early in the morning,
then decreasing to 0.5 early decreasing to less
than 0.1 late in the morning increasing to 0.3
increasing to 1.3 early increasing to 2.0
increasing to 3.0 early in the afternoon
increasing to 5.3 increasing to 8.5 late in the
afternoon increasing to 11.
Visibility..........9.
Water temperature...
Mixing height.......4000 ft AGL.
Transport winds.....West 9 to 13 mph.
Smoke dispersal.....Poor (6500 knot-ft) early in the morning
increasing to good (44200 knot-ft) in the
afternoon.
LVORI...............7.
ADI.................1 to 39.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........69 67 65 64 62 61 62 63 64 61 57 54
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........
Chc of pcpn (%).50 40 40 40 30 30 30 30 20 20 20 20
Chc of rain (%).50 50 50 40 30 20 20 30 30 20 20 20
Chc of thdr (%).0 0 0 0 0 0 0 0 10 10 10 10
Temp............63 63 64 66 69 71 73 74 75 75 74 73
RH..............100 100 100 95 90 84 79 76 74 74 76 79
Heat index (F)..63 63 64 66 69 71 73 74 75 75 74 73
Wind chill (F)..63 63 64 66 69 71 73 74 75 75 74 73
Aparnt tmp (F)..63 63 64 66 69 71 73 74 75 75 74 73
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..6 6 6 6 7 7 7 7 7 7 7 6
20 FT wind gust.12 12 12 13 14 14 15 15 16 15 15 13
Eye lvl wnd dir.W W W W W W W W W W W W
Eye lvl wnd spd.4 4 4 4 4 4 4 4 4 4 4 4
Eye lvl wnd gst.7 7 7 8 8 8 9 9 10 9 9 8
Surface wnd dir.W W W W W W W W W W W W
Surface wnd spd.6 6 6 6 7 7 7 7 7 7 7 6
Surface wnd gst.12 12 12 13 14 14 15 15 16 15 15 13
Mix hgt (kft)...0.7 1.0 1.4 2.0 2.6 3.2 3.7 3.9 4.0 3.8 3.3 2.7
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.10 9 9 10 12 13 13 13 13 13 13 12
100 ft wind.....
LVORI...........9 10 10 9 7 6 4 4 4 4 3 3
ADI.............7 1 1 1 1 1 1 1 1 1 32 39
Vrate kt-ft/1K..7 8 11 17 26 36 41 44 44 41 35 27
Ventrate Cat....PR PR PR PR PR PR FR FR FR FR PR PR
Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0
Ceiling (kft)...9.9 4.9 0.5 0.0 0.3 1.3 1.5 2.0 3.0 5.3 8.5 11
Visibility (sm).9 9 9 9 9 9 9 9 9 9 9 9
Water temp......
$$
Forecaster...FT
Requested by...Kevin Filchik
Type of request...OTHER
.TAG 2522428.0/BOX
.DELDT 09/23/25
.FormatterVersion 2.0.0
.EMAIL mema.statecontrol@mass.gov