Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
Versions:
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FNUS71 KBOX 181358
FWSBOX
Spot Forecast for Saunders Brook Fire...MEMA
National Weather Service Boston/Norton MA
958 AM EDT Mon Aug 18 2025
Forecast is based on forecast start time of 1000 EDT on August 18.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
For Monday, mostly sunny, fall-like temperatures, and much lower
humidity due to high pressure sinking south out of Canada. Winds
are generally light and out of the north/northeast. Anticipate a
clear and cool night ahead and similar conditions for Tuesday.
.REST OF TODAY...
Sky/weather.........Sunny.
CWR.................0 percent.
Max temperature.....Around 73.
Min humidity........30 percent.
Dewpoint............42.
Max apparent temp...73.
Surface winds (mph).Northeast winds 7 to 10 mph.
Wind (20 ft)........Northeast winds 7 to 10 mph.
Mixing height.......4100 ft AGL.
Transport winds.....North 8 to 12 mph.
Smoke dispersal.....Fair (22500 knot-ft).
LVORI...............1.
ADI.................33 to 39.
CEILING (KFT).......25.
Eye level winds.....Northeast winds up to 6 mph.
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........7 6 7 8 9 9 9 10
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0
Temp............60 64 66 69 71 72 73 72
Dewpoint........44 43 42 40 41 41 40 41
RH..............55 46 42 35 34 33 30 33
Heat index (F)..60 64 66 69 71 72 73 72
20 FT wind dir..NE NE NE N N N NE NE
20 FT wind spd..10 9 9 8 8 8 8 7
20 FT wind gust.20 17 17 16 16 15 15 14
Eye lvl wnd dir.NE NE NE N N N NE NE
Eye lvl wnd spd.6 5 5 5 5 5 5 4
Eye lvl wnd gst.12 10 10 10 10 9 9 8
Surface wnd dir.NE NE NE N N N NE NE
Surface wnd spd.10 9 9 8 8 8 8 7
Surface wnd gst.20 17 17 16 16 15 15 14
Mix hgt (kft)...2.3 2.8 3.0 3.5 3.7 4.0 4.1 4.0
Transp wind dir.N N N N N N N N
Transp wind spd.12 10 10 9 8 8 8 8
LVORI...........1 1 1 1 1 1 1 1
ADI.............33 36 38 39 36 38 39 38
Vrate kt-ft/1K..23 25 27 28 26 28 28 28
Ventrate Cat....PR PR PR PR PR PR PR PR
Ceiling (kft)...25 25 25 25 25 25 25 25
.TONIGHT...
Sky/weather.........Mostly clear.
CWR.................0 percent.
Min temperature.....Around 45.
Max humidity........93 percent.
Dewpoint............43.
Max apparent temp...68.
Surface winds (mph).Northeast winds 5 to 6 mph early in the evening
becoming light.
Wind (20 ft)........Northeast winds around 6 mph decreasing to
around 5 mph early in the evening, then
becoming light until just after midnight.
Mixing height.......400 ft AGL.
Transport winds.....Northeast 6 to 7 mph shifting to the south
around 5 mph early in the morning.
Smoke dispersal.....Fair (17300 knot-ft) early in the evening
decreasing to poor (1800 knot-ft) late in the
night.
LVORI...............5.
ADI.................2 to 25.
CEILING (KFT).......25 decreasing to 15.
Eye level winds.....Northeast winds up to 4 mph early in the
evening becoming light.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 11 11 10 8 6 12 17 23 26 29 33
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............68 64 59 55 53 51 50 49 48 47 46 46
Dewpoint........41 43 44 44 44 45 45 45 45 45 44 44
RH..............37 46 57 66 71 80 83 86 89 93 93 93
Heat index (F)..68 64 59 55 53 51 50 49 48 47 46 46
20 FT wind dir..NE NE NE NE N N N W SW W W W
20 FT wind spd..6 5 3 3 3 3 3 2 2 2 2 2
20 FT wind gust.12 9 7 6 6 6 6 5 5 5 5 5
Eye lvl wnd dir.NE NE NE NE N N N W SW W W W
Eye lvl wnd spd.4 3 2 2 2 2 2 1 1 1 1 1
Eye lvl wnd gst.7 5 4 4 4 4 4 3 3 3 3 3
Surface wnd dir.NE NE NE NE N N N W SW W W W
Surface wnd spd.6 5 3 3 3 3 3 2 2 2 2 2
Surface wnd gst.12 9 7 6 6 6 6 5 5 5 5 5
Mix hgt (kft)...2.9 0.6 0.4 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.NE NE NE NE NE NE NE E SE SE S S
Transp wind spd.7 6 7 6 6 7 7 6 6 6 5 5
LVORI...........2 2 3 3 3 4 5 5 6 6 7 7
ADI.............25 6 3 3 3 3 3 3 3 3 2 2
Vrate kt-ft/1K..17 3 3 2 2 3 3 2 2 2 2 2
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...25 25 25 25 25 25 25 20 20 20 15 15
.TUESDAY...
Sky/weather.........Mostly sunny.
CWR.................0 percent.
Max temperature.....Around 74.
Min humidity........43 percent.
Dewpoint............47 increasing to 50 late in the afternoon.
Max apparent temp...73.
Surface winds (mph).Light winds becoming southeast 5 to 6 mph in
the late morning and afternoon.
Wind (20 ft)........Light winds becoming southeast 5 to 6 mph in
the late morning and afternoon.
Mixing height.......5700 ft AGL.
Transport winds.....South 5 to 9 mph.
Smoke dispersal.....Poor (1800 knot-ft) early in the morning
increasing to good (42400 knot-ft) in the
afternoon.
LVORI...............4.
ADI.................5 early in the morning increasing to 51 in the
afternoon.
CEILING (KFT).......15 increasing to 20 in the morning, then
decreasing to 14 early in the afternoon
decreasing to 11 early in the afternoon
decreasing to 9.0 decreasing to 7.0 late in the
afternoon decreasing to 5.0.
Eye level winds.....Light winds becoming southeast up to 4 mph in
the late morning and afternoon.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........38 43 48 40 31 23 27 31 35 41 47 53
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............47 50 53 57 62 66 69 70 72 73 73 72
Dewpoint........45 46 47 47 47 47 48 49 49 49 49 50
RH..............93 86 80 69 58 50 47 47 44 43 43 46
Heat index (F)..47 50 53 57 62 66 69 70 72 73 73 72
20 FT wind dir..NW NE E E SE SE SE SE S S S S
20 FT wind spd..2 2 2 3 5 6 6 6 6 6 6 6
20 FT wind gust.3 3 3 6 8 10 10 10 10 10 12 12
Eye lvl wnd dir.NW NE E E SE SE SE SE S S S S
Eye lvl wnd spd.1 1 1 2 3 4 4 4 4 4 4 4
Eye lvl wnd gst.2 2 2 4 5 6 6 6 6 6 7 7
Surface wnd dir.NW NE E E SE SE SE SE S S S S
Surface wnd spd.2 2 2 3 5 6 6 6 6 6 6 6
Surface wnd gst.3 3 3 6 8 10 10 10 10 10 12 12
Mix hgt (kft)...0.4 0.4 0.6 1.7 2.9 3.8 4.4 4.8 5.0 5.5 5.7 5.3
Transp wind dir.S S SE SE SE SE S S S S S S
Transp wind spd.5 6 6 6 6 6 6 6 6 7 8 9
LVORI...........6 5 4 3 2 2 2 1 1 1 1 2
ADI.............5 6 6 13 20 26 30 32 33 43 51 29
Vrate kt-ft/1K..2 2 3 9 14 19 22 24 25 33 40 42
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR FR
Ceiling (kft)...15 20 20 20 20 20 15 14 11 9.0 7.0 5.0
$$
Forecaster...Dooley
Requested by...Nathan Moreau
Type of request...WILDFIRE
.TAG 2520132.0/BOX
.DELDT 08/18/25
.FormatterVersion 2.0.0
.EMAIL nathan.moreau@mass.gov