Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
161
FNUS71 KBOX 281144
FWSBOX
Spot Forecast for Desert...Mass DCR
National Weather Service Boston/Norton MA
744 AM EDT Fri Mar 28 2025
Forecast is based on ignition time of 0804 EDT on March 28.
If conditions become unrepresentative, contact the National
Weather Service.
High pressure builds overhead today with mostly clear skies. West
winds will increase through the afternoon to between 10 and 15
mph with occasional gusts up to 25 mph. Winds shift to the
southeast overnight Friday then to the northeast Saturday morning.
Overnight wind speeds will fall to 5 to 10 mph. Rain showers will
become more likely overnight Friday, transitioning to more of a
steady rainfall Saturday morning. Rain and periods of drizzle
likely continue through most of the day Saturday. Winds Saturday
will be from the northeast between 10 and 15 mph gusts up to 25
mph.
Relative humidity values will fall to around 35 percent Friday.
Minimum relative humidity values will rise to around 80 percent on
Saturday.
.REST OF TODAY...
Sky/weather.........Mostly sunny then becoming mostly cloudy.
CWR.................0 percent.
Max temperature.....Around 57.
Min humidity........24 percent.
Dewpoint............20.
Min apparent temp...38.
Surface winds (mph).West winds 7 to 13 mph becoming 9 to 12 mph
early.
Wind (20 ft)........West winds 9 to 13 mph.
Mixing height.......5300 ft AGL.
Transport winds.....West 18 to 24 mph.
Smoke dispersal.....Fair (17800 knot-ft) early in the morning
increasing to excellent (95300 knot-ft) in the
afternoon.
LVORI...............2.
ADI.................27 increasing to 70 late in the morning, then
increasing to 81 to 88 decreasing to 78 early
in the afternoon decreasing to 61 to 65
increasing to 86 to 91 late in the afternoon
decreasing to 73.
CEILING (KFT).......14 decreasing to 10 early.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........12 23 33 35 45 55 65 68 73 76
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............42 44 45 48 51 53 54 56 56 55
Dewpoint........22 22 22 22 21 21 20 20 20 19
RH..............44 42 40 35 30 28 26 24 24 24
Heat index (F)..38 38 39 43 51 53 54 56 56 55
20 FT wind dir..SW W W W W W W W W W
20 FT wind spd..7 9 13 12 12 12 12 10 10 9
20 FT wind gust.14 18 23 22 21 20 20 18 21 18
Surface wnd dir.SW W W W W W W W W W
Surface wnd spd.7 9 13 12 12 12 12 10 10 9
Surface wnd gst.14 18 23 22 21 20 20 18 21 18
Mix hgt (kft)...1.0 2.5 3.2 4.2 4.0 4.5 5.3 5.0 5.0 4.5
Transp wind dir.W W W W W W W W W W
Transp wind spd.20 24 24 23 21 21 21 21 22 18
LVORI...........2 1 1 1 1 1 1 1 1 1
ADI.............27 70 81 88 78 61 65 86 91 73
Vrate kt-ft/1K..18 54 68 84 73 82 95 90 95 72
Ventrate Cat....PR FR GD GD GD GD GD GD GD GD
Ceiling (kft)...15 14 14 12 12 11 11 10 10 10
.TONIGHT...
Sky/weather.........Cloudy. Slight chance of rain showers late in
the evening. Chance of rain showers, then rain
showers likely after midnight.
CWR.................0 percent increasing to 80 percent.
Min temperature.....Around 37.
Max humidity........96 percent.
Dewpoint............23 increasing to 36.
Min apparent temp...36.
Surface winds (mph).West winds 5 to 8 mph early in the evening
becoming light, then becoming northeast around
5 mph early in the morning.
Wind (20 ft)........West winds around 8 mph decreasing to around 5
mph early in the evening, then becoming light
until just after midnight becoming northeast
around 5 mph early in the morning.
Mixing height.......400 ft AGL.
Transport winds.....West 7 to 14 mph shifting to the south around 6
mph early, then shifting to the east 5 to 12
mph after midnight.
Smoke dispersal.....Fair (25200 knot-ft) early in the evening
decreasing to poor (1600 knot-ft) late in the
night.
LVORI...............4.
ADI.................19 decreasing to 2 to 8.
CEILING (KFT).......10 decreasing to 0.3.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........82 88 94 96 97 99 99 99 99 99 99 99
Weather cov..... SCH CHC CHC CHC LKY LKY LKY LKY LKY
Weather type.... RW RW RW RW RW RW RW RW RW
Tstm cov........
CWR.............0 0 30 30 30 30 30 30 80 80 80 80
Temp............53 51 47 47 46 45 44 43 42 41 40 39
Dewpoint........21 23 25 27 25 26 28 30 33 35 36 37
RH..............28 33 42 45 43 47 53 60 70 79 85 92
Heat index (F)..53 51 47 47 46 45 44 41 40 39 37 36
20 FT wind dir..W W SW S SE E E E E E NE NE
20 FT wind spd..8 5 2 2 2 2 2 3 3 3 5 5
20 FT wind gust.15 13 10 10 6 6 7 8 9 9 9 9
Surface wnd dir.W W SW S SE E E E E E NE NE
Surface wnd spd.8 5 2 2 2 2 2 3 3 3 5 5
Surface wnd gst.15 13 10 10 6 6 7 8 9 9 9 9
Mix hgt (kft)...2.1 0.6 0.5 0.5 0.4 0.5 0.5 0.6 0.7 0.7 0.9 1.3
Transp wind dir.W W SW S E E E E E E E NE
Transp wind spd.14 7 6 6 5 7 7 7 8 9 10 12
LVORI...........2 2 2 2 2 2 2 3 3 4 4 6
ADI.............19 5 3 3 2 3 3 3 4 4 7 8
Vrate kt-ft/1K..25 4 3 2 2 3 3 3 5 6 8 13
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...10 9.0 7.0 6.0 5.0 4.5 3.5 2.0 0.8 0.8 0.8 0.3
.SATURDAY...
Sky/weather.........Cloudy. Chance of rain showers, then rain
showers likely late in the afternoon.
CWR.................80 percent decreasing to 23 percent through
early afternoon, then increasing to 33 percent
late in the afternoon.
Max temperature.....Around 38.
Min humidity........85 percent.
Dewpoint............35.
Min apparent temp...32.
Surface winds (mph).Northeast winds 5 to 9 mph.
Wind (20 ft)........Northeast winds 5 to 9 mph.
Mixing height.......1700 ft AGL.
Transport winds.....Northeast 10 to 13 mph.
Smoke dispersal.....Poor (11300 knot-ft) early in the morning
increasing to fair (17900 knot-ft) in the
afternoon.
LVORI...............5.
ADI.................7 to 16 increasing to 16 to 22 through early
afternoon.
CEILING (KFT).......0.3 increasing to 0.8.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........97 96 94 92 90 88 88 87 86 88 89 90
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC LKY
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........
CWR.............80 80 20 20 20 20 20 20 30 30 30 30
Temp............38 38 37 37 37 38 38 38 38 38 38 38
Dewpoint........36 36 36 36 35 35 35 36 36 35 35 35
RH..............92 92 96 96 92 89 89 92 92 89 89 89
Heat index (F)..34 34 32 32 32 32 32 32 32 32 32 32
20 FT wind dir..NE NE NE NE NE NE NE NE NE NE NE NE
20 FT wind spd..5 6 6 6 7 8 8 8 9 9 8 8
20 FT wind gust.10 10 10 12 14 15 16 16 17 17 16 16
Surface wnd dir.NE NE NE NE NE NE NE NE NE NE NE NE
Surface wnd spd.5 6 6 6 7 8 8 8 9 9 8 8
Surface wnd gst.10 10 10 12 14 15 16 16 17 17 16 16
Mix hgt (kft)...1.3 1.3 1.4 1.4 1.4 1.6 1.7 1.6 1.5 1.5 1.4 1.3
Transp wind dir.NE NE NE E NE NE E E NE NE NE NE
Transp wind spd.10 10 12 10 10 13 12 13 13 12 12 10
LVORI...........6 5 5 5 5 4 4 5 5 4 4 4
ADI.............7 16 18 16 16 22 20 22 21 19 18 16
Vrate kt-ft/1K..11 12 14 12 13 18 17 18 17 15 14 12
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...0.3 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
$$
Forecaster...FT
Requested by...Brian Johnson
Type of request...PRESCRIBED
.TAG 2507429.3/BOX
.DELDT 03/28/25
.FormatterVersion 2.0.0
.EMAIL Brian.R.Johnson@Mass.Gov