Suppression Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
885
FNUS71 KBOX 201021
FWSBOX
Spot Forecast for Freetown Rx...MA DCR Fire
National Weather Service Boston/Norton MA
621 AM EDT Tue May 20 2025
Forecast is based on ignition time of 0600 EDT on May 20.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
Overcast conditions continue near the Freetown prescribed burn
site early this morning, along with continued northwesterly winds
gusting to around 20 mph. Although some limited peeks of sun
could take place thru mid morning, we`ll be trending toward
overcast skies with winds becoming north this afternoon and to
the northeast by late afternoon. Unseasonably cool temperatures
today with highs in the middle to upper 50s, which will keep
relative humidities on the higher end at around 55-60 percent.
Good ventilation should still take place, although mixing depths
will be on the shallow side. Modest transport of smoke towards the
south and southwest is also anticipated as winds come around from
the north and northeast.
.TODAY...
Sky/weather.........Mostly cloudy.
CWR.................0 percent.
Max temperature.....Around 57.
Min humidity........57 percent.
Dewpoint............40 increasing to 43 late in the afternoon.
Max apparent temp...57.
Surface winds (mph).North winds 7 to 9 mph. Gusts up to 21 mph
early in the morning.
Wind (20 ft)........North winds 7 to 9 mph. Gusts up to 21 mph
early in the morning.
Mixing height.......4000 ft AGL.
Transport winds.....North 14 to 17 mph.
Smoke dispersal.....Fair (20200 knot-ft) early in the morning
increasing to good (47800 knot-ft) in the
afternoon.
LVORI...............2.
ADI.................30 to 36 increasing to 44 to 53 through early
afternoon.
CEILING (KFT).......3.5 decreasing to 2.5.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........65 62 84 82 92 92 91 95 95 96 95 95
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............47 49 51 53 54 56 57 57 57 56 56 55
Dewpoint........38 39 40 40 41 41 42 42 43 44 44 44
RH..............71 68 66 61 61 57 57 57 59 64 64 66
Heat index (F)..44 46 51 53 54 56 57 57 57 56 56 55
20 FT wind dir..N N N N N N N N N N N N
20 FT wind spd..7 8 9 9 9 9 9 8 8 9 8 9
20 FT wind gust.21 21 20 18 16 15 14 14 14 15 16 17
Surface wnd dir.N N N N N N N N N N N N
Surface wnd spd.7 8 9 9 9 9 9 8 8 9 8 9
Surface wnd gst.21 21 20 18 16 15 14 14 14 15 16 17
Mix hgt (kft)...1.4 1.8 2.1 2.6 3.1 3.5 3.7 3.8 4.0 3.5 3.1 2.7
Transp wind dir.N N N N N N N N N N N NE
Transp wind spd.16 16 17 16 16 15 15 14 14 14 15 15
LVORI...........3 3 1 1 1 1 1 1 1 1 1 1
ADI.............30 36 44 47 52 52 53 50 51 48 49 45
Vrate kt-ft/1K..20 25 31 36 43 46 48 46 48 42 40 35
Ventrate Cat....PR PR PR PR FR FR FR FR FR FR FR PR
Ceiling (kft)...4.0 4.0 4.0 4.0 3.5 3.5 3.0 3.0 2.5 2.5 2.5 2.5
.TONIGHT...
Sky/weather.........Cloudy. Patchy drizzle around midnight.
CWR.................0 percent.
Min temperature.....Around 47.
Max humidity........86 percent.
Dewpoint............43.
Max apparent temp...54.
Surface winds (mph).Northeast winds 5 to 8 mph.
Wind (20 ft)........Northeast winds 5 to 8 mph.
Mixing height.......1100 ft AGL.
Transport winds.....Northeast 7 to 14 mph.
Smoke dispersal.....Fair (28700 knot-ft) early in the evening
decreasing to poor (6300 knot-ft) late in the
night.
LVORI...............4.
ADI.................35 to 38 decreasing to 5 to 10 until just after
midnight.
CEILING (KFT).......2.5 decreasing to 2.0 early in the evening,
then increasing to 2.5 late in the evening
decreasing to 2.0 around midnight decreasing to
1.5.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........95 94 96 92 91 100 94 88 83 87 91 95
Weather cov..... PTY PTY PTY PTY
Weather type.... DZL DZL DZL DZL
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............54 53 51 51 50 50 49 48 48 47 47 47
Dewpoint........44 44 44 43 44 44 44 44 44 43 43 42
RH..............69 71 77 74 80 80 83 86 86 86 86 83
Heat index (F)..54 53 51 51 48 48 47 45 45 44 44 44
20 FT wind dir..NE NE NE NE N N NE NE NE NE NE NE
20 FT wind spd..8 8 6 6 5 5 6 6 7 6 6 6
20 FT wind gust.17 17 16 15 15 14 12 10 10 10 12 12
Surface wnd dir.NE NE NE NE N N NE NE NE NE NE NE
Surface wnd spd.8 8 6 6 5 5 6 6 7 6 6 6
Surface wnd gst.17 17 16 15 15 14 12 10 10 10 12 12
Mix hgt (kft)...2.4 2.1 1.8 1.7 1.5 1.4 1.3 1.2 1.1 1.2 1.3 1.4
Transp wind dir.NE NE NE NE NE NE NE NE NE NE NE NE
Transp wind spd.14 14 13 12 10 9 8 8 7 7 7 7
LVORI...........3 3 4 3 4 4 4 5 5 5 5 4
ADI.............38 35 8 8 7 10 5 5 5 5 5 5
Vrate kt-ft/1K..29 25 20 17 14 11 9 8 6 7 8 8
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...2.5 2.0 2.0 2.5 2.5 2.0 2.0 2.0 2.0 2.0 1.5 1.5
.WEDNESDAY...
Sky/weather.........Cloudy. Patchy drizzle through early afternoon.
CWR.................0 percent.
Max temperature.....Around 54.
Min humidity........63 percent.
Dewpoint............41.
Max apparent temp...52.
Surface winds (mph).Northeast winds 7 to 12 mph.
Wind (20 ft)........Northeast winds 7 to 12 mph.
Mixing height.......3900 ft AGL.
Transport winds.....Northeast 10 to 18 mph.
Smoke dispersal.....Fair (17500 knot-ft) early in the morning
increasing to excellent (61000 knot-ft) in the
afternoon.
LVORI...............2.
ADI.................25 increasing to 40 to 42 early in the morning,
then increasing to 54 to 60 late in the morning
increasing to 67 early decreasing to 42 to 47
decreasing to 37 late in the afternoon.
CEILING (KFT).......1.5 increasing to 2.0 early, then increasing to
2.5 early in the afternoon decreasing to 2.0
late in the afternoon.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........96 98 100 99 99 98 99 99 100 100 100 100
Weather cov..... PTY PTY PTY PTY PTY PTY PTY
Weather type.... DZL DZL DZL DZL DZL DZL DZL
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............47 48 49 50 50 51 52 52 52 52 51 50
Dewpoint........42 42 42 41 41 41 40 40 40 41 41 42
RH..............83 80 77 71 71 68 63 63 63 66 68 74
Heat index (F)..44 45 46 46 46 51 52 52 52 52 51 46
20 FT wind dir..NE NE NE NE NE NE NE NE NE NE NE NE
20 FT wind spd..7 7 8 9 10 10 10 12 12 10 10 9
20 FT wind gust.13 14 14 16 17 18 18 17 17 17 16 15
Surface wnd dir.NE NE NE NE NE NE NE NE NE NE NE NE
Surface wnd spd.7 7 8 9 10 10 10 12 12 10 10 9
Surface wnd gst.13 14 14 16 17 18 18 17 17 17 16 15
Mix hgt (kft)...1.9 2.5 3.0 3.3 3.5 3.8 3.8 3.9 3.9 3.7 3.5 3.3
Transp wind dir.NE NE NE NE NE NE NE NE NE NE E E
Transp wind spd.10 14 17 16 17 18 18 17 17 16 16 15
LVORI...........3 3 3 3 3 1 1 1 1 1 1 3
ADI.............25 40 42 54 60 67 67 47 47 43 42 37
Vrate kt-ft/1K..18 30 46 46 53 60 61 58 58 52 49 42
Ventrate Cat....PR PR FR FR FR GD GD FR FR FR FR FR
Ceiling (kft)...1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.5 2.5 2.0 2.0
$$
Forecaster...Loconto
Requested by...Aaron Whiddon
Type of request...PRESCRIBED
.TAG 2514313.0/BOX
.DELDT 05/20/25
.FormatterVersion 2.0.0
.EMAIL aaron.whiddon@mass.gov