321
FNUS71 KBOX 031847
FWSBOX
SPOT FORECAST FOR COMMON LANDS...MASS DCR
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
247 PM EDT SUN MAY 3 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON MAY 05.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
MAINLY DRY, WINDY & UNSEASONABLY WARM TUESDAY BEFORE COOLER
TEMPERATURES AND RAIN ARRIVES WEDNESDAY INTO THURSDAY. SW WINDS
WILL GUST 25 TO 35 KTS ON TUESDAY AND WEDNESDAY AFTERNOONS.
MINIMUM RELATIVE HUMIDITY IS LOWEST ON TUESDAY AROUND 45 PERCENT.
RAIN ARRIVES ON WEDNESDAY WITH A MINIMUM RELATIVE HUMIDITY OF
AROUND 60 PERCENT.
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........47 PERCENT.
DEWPOINT............48.
MAX APPARENT TEMP...68.
SURFACE WINDS (MPH).SOUTHWEST WINDS 10 TO 18 MPH WITH GUSTS TO
AROUND 36 MPH SHIFTING TO THE SOUTH AROUND 20
MPH WITH GUSTS TO AROUND 41 MPH LATE IN THE
AFTERNOON.
WIND (20 FT)........SOUTHWEST WINDS 13 TO 20 MPH WITH GUSTS TO
AROUND 41 MPH.
MIXING HEIGHT.......2300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 24 TO 31 MPH.
SMOKE DISPERSAL.....FAIR (29700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (60900 KNOT-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................45 TO 83.
CEILING (KFT).......11 INCREASING TO 17.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........27 25 24 22 22 22 22 27 31 35
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............57 60 63 66 67 68 68 68 68 67
DEWPOINT........49 49 49 49 49 49 48 48 47 47
RH..............75 67 60 54 52 51 49 49 47 49
HEAT INDEX (F)..57 60 63 66 67 68 68 68 68 67
20 FT WIND DIR..SW SW SW SW SW S S S S S
20 FT WIND SPD..10 13 15 17 18 18 20 20 20 20
20 FT WIND GUST.22 23 25 26 31 36 41 40 40 40
SURFACE WND DIR.SW SW SW SW SW S S S S S
SURFACE WND SPD.10 13 15 17 18 18 20 20 20 20
SURFACE WND GST.22 23 25 26 31 36 41 40 40 40
MIX HGT (KFT)...1.4 1.6 1.8 1.9 2.1 2.2 2.3 2.2 2.0 1.8
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.24 25 25 26 28 30 31 31 31 31
LVORI...........3 1 1 1 1 1 1 1 1 1
ADI.............45 53 58 64 71 80 83 81 76 69
VRATE KT-FT/1K..30 36 40 45 51 58 61 59 54 48
VENTRATE CAT....PR PR PR FR FR FR GD FR FR FR
CEILING (KFT)...11 12 13 14 15 15 16 17 18 20
TUESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........90 PERCENT.
DEWPOINT............49.
MAX APPARENT TEMP...65.
SURFACE WINDS (MPH).SOUTHWEST WINDS 13 TO 17 MPH. GUSTS UP TO 36
MPH DECREASING TO 26 MPH AFTER MIDNIGHT.
WIND (20 FT)........SOUTHWEST WINDS 13 TO 17 MPH. GUSTS UP TO 36
MPH DECREASING TO 26 MPH AFTER MIDNIGHT.
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 25 TO 31 MPH.
SMOKE DISPERSAL.....GOOD (41000 KNOT-FT) EARLY IN THE EVENING
DECREASING TO FAIR (20200 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................23 TO 61.
CEILING (KFT).......21 INCREASING TO 24 EARLY, THEN DECREASING TO
21 LATE IN THE EVENING DECREASING TO 18
DECREASING TO 12 DECREASING TO 10 EARLY IN THE
MORNING DECREASING TO 7.9.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........39 43 47 52 57 62 62 63 63 69 76 82
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............65 62 60 58 57 56 56 56 56 56 55 55
DEWPOINT........48 48 49 49 49 49 50 50 51 51 51 51
RH..............54 60 67 72 75 77 80 80 83 83 86 86
HEAT INDEX (F)..65 62 60 58 57 56 56 56 56 56 55 55
20 FT WIND DIR..S SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..17 16 14 14 14 14 14 13 13 13 13 13
20 FT WIND GUST.36 32 28 28 28 28 26 26 25 25 25 25
SURFACE WND DIR.S SW SW SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.17 16 14 14 14 14 14 13 13 13 13 13
SURFACE WND GST.36 32 28 28 28 28 26 26 25 25 25 25
MIX HGT (KFT)...1.5 1.3 1.1 1.0 0.9 0.9 0.9 0.9 1.0 1.0 1.0 1.0
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.31 30 29 28 26 25 26 29 30 29 28 26
LVORI...........1 1 3 3 3 3 3 3 4 4 4 4
ADI.............61 49 26 25 24 23 24 26 27 26 25 24
VRATE KT-FT/1K..41 33 27 23 21 20 21 24 25 24 23 24
VENTRATE CAT....FR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...21 22 24 21 18 15 15 15 14 12 10 7.9
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
CHANCE OF RAIN SHOWERS EARLY IN THE AFTERNOON,
THEN RAIN SHOWERS LIKELY LATE IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 100 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........72 PERCENT.
DEWPOINT............53.
MAX APPARENT TEMP...63.
SURFACE WINDS (MPH).SOUTH WINDS 13 TO 18 MPH. GUSTS UP TO 33 MPH
INCREASING TO 39 MPH IN THE AFTERNOON.
WIND (20 FT)........SOUTH WINDS 13 TO 18 MPH. GUSTS UP TO 33 MPH
INCREASING TO 39 MPH IN THE AFTERNOON.
MIXING HEIGHT.......2300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 25 TO 32 MPH DECREASING TO AROUND 22
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (26900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (63500 KNOT-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................35 TO 66.
CEILING (KFT).......6.8 DECREASING TO 1.4.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........81 81 80 83 85 88 88 88 88 88 88 88
WEATHER COV..... SCH SCH CHC CHC CHC CHC LKY LKY
WEATHER TYPE.... RW RW RW RW RW RW RW RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 100 100 100 100
TEMP............55 55 56 58 60 62 63 63 62 62 61 60
DEWPOINT........52 52 53 53 54 54 54 54 54 54 54 54
RH..............90 90 90 83 81 75 72 72 75 75 78 81
HEAT INDEX (F)..55 55 56 58 60 62 63 63 62 62 61 60
20 FT WIND DIR..SW S S S S S S S S S S S
20 FT WIND SPD..13 13 13 15 16 18 18 18 18 18 18 18
20 FT WIND GUST.25 25 25 26 29 30 33 36 39 39 38 38
SURFACE WND DIR.SW S S S S S S S S S S S
SURFACE WND SPD.13 13 13 15 16 18 18 18 18 18 18 18
SURFACE WND GST.25 25 25 26 29 30 33 36 39 39 38 38
MIX HGT (KFT)...1.3 1.5 1.8 2.0 2.1 2.2 2.2 2.3 2.2 2.0 1.7 1.4
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.26 28 29 30 30 31 32 32 31 29 25 22
LVORI...........4 4 4 4 3 3 3 3 3 3 3 3
ADI.............43 46 52 57 59 62 66 66 63 55 44 35
VRATE KT-FT/1K..29 37 45 51 54 58 63 64 60 50 37 27
VENTRATE CAT....PR PR FR FR FR FR GD GD FR FR PR PR
CEILING (KFT)...7.3 6.8 6.2 6.4 6.5 6.7 5.1 3.6 2.0 1.8 1.6 1.4
FORECASTER...BRW
REQUESTED BY...MICHAEL MARQUARDT
TYPE OF REQUEST...PRESCRIBED
.TAG 2612450.0/BOX
.DELDT 05/03/26
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.MARQUARDT@MASS.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page