808
FNUS71 KBOX 070827
FWSBOX
SPOT FORECAST FOR LYMAN...MASS DCR
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
427 AM EDT TUE APR 7 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON APRIL 08.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
SUNNY SKIES ARE ON TAP FOR WEDNESDAY WITH HIGH PRESSURE IN
CONTROL. HIGH TEMPERATURES WILL BE BETWEEN 40 AND 45 WITH
NORTHEAST WINDS BECOMING EAST AT 5 TO 15 MPH. MINIMUM AFTERNOON
RELATIVE HUMIDITY VALUES ARE EXPECTED TO DROP TO BETWEEN 30 AND 35
PERCENT. THESE RELATIVE HUMIDITY VALUES WILL QUICKLY RECOVER BY
EARLY WEDNESDAY EVENING GIVEN LIGHT WINDS AND GOOD RADIATIONAL
COOLING CONDITIONS.
WEDNESDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 43.
MIN HUMIDITY........33 PERCENT.
DEWPOINT............16.
MIN APPARENT TEMP...22.
SURFACE WINDS (MPH).NORTHEAST WINDS 9 TO 10 MPH SHIFTING TO THE
EAST AROUND 9 MPH LATE IN THE AFTERNOON.
WIND (20 FT)........NORTH WINDS AROUND 9 MPH SHIFTING TO THE EAST
LATE IN THE AFTERNOON.
MIXING HEIGHT.......3800 FT AGL.
TRANSPORT WINDS.....NORTHEAST 9 TO 15 MPH SHIFTING TO THE EAST
AROUND 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (21000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (40000 KNOT-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................27 TO 47.
CEILING (KFT).......25.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 3 3 3 2 1 0 0 0 0
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............30 32 35 38 40 41 42 42 42 41
DEWPOINT........17 17 16 16 16 16 16 16 15 15
RH..............58 53 45 40 37 36 34 34 33 34
HEAT INDEX (F)..22 24 27 31 33 35 36 36 36 35
20 FT WIND DIR..N N NE NE NE NE NE E E E
20 FT WIND SPD..9 10 10 10 10 10 9 9 9 9
20 FT WIND GUST.17 16 16 15 14 14 13 12 12 10
SURFACE WND DIR.N N NE NE NE NE NE E E E
SURFACE WND SPD.9 10 10 10 10 10 9 9 9 9
SURFACE WND GST.17 16 16 15 14 14 13 12 12 10
MIX HGT (KFT)...2.9 3.3 3.6 3.7 3.8 3.8 3.6 3.4 3.0 2.6
TRANSP WIND DIR.N N NE NE NE NE NE E E E
TRANSP WIND SPD.15 14 12 10 10 10 9 9 9 9
LVORI...........1 1 1 1 1 1 1 1 2 2
ADI.............47 47 41 37 38 37 33 31 30 27
VRATE KT-FT/1K..37 40 36 34 34 34 29 27 24 21
VENTRATE CAT....PR FR PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 25 25 25 25 25 25 25 25
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 25.
MAX HUMIDITY........96 PERCENT.
DEWPOINT............18 INCREASING TO 24 UNTIL JUST AFTER MIDNIGHT.
MIN APPARENT TEMP...27.
SURFACE WINDS (MPH).SOUTHEAST WINDS 6 TO 7 MPH EARLY IN THE EVENING
BECOMING LIGHT.
WIND (20 FT)........SOUTHEAST WINDS AROUND 7 MPH DECREASING TO
AROUND 6 MPH EARLY IN THE EVENING, THEN
BECOMING LIGHT UNTIL JUST AFTER MIDNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 9 MPH.
SMOKE DISPERSAL.....FAIR (13500 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (1600 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............4.
ADI.................2 TO 19.
CEILING (KFT).......24.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........1 2 3 3 4 4 5 6 7 9 10 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............40 38 34 32 30 29 28 28 28 27 27 27
DEWPOINT........17 19 23 25 25 25 25 26 26 26 26 26
RH..............39 46 64 75 81 85 88 92 92 96 96 96
HEAT INDEX (F)..35 34 31 32 30 29 28 28 28 27 27 27
20 FT WIND DIR..SE SE SE SE S S S S S S S S
20 FT WIND SPD..7 6 3 2 2 2 1 1 1 1 1 1
20 FT WIND GUST.10 10 10 9 8 7 6 6 6 5 5 5
SURFACE WND DIR.SE SE SE SE S S S S S S S S
SURFACE WND SPD.7 6 3 2 2 2 1 1 1 1 1 1
SURFACE WND GST.10 10 10 9 8 7 6 6 6 5 5 5
MIX HGT (KFT)...2.2 1.7 1.3 1.0 0.9 0.8 0.7 0.6 0.6 0.5 0.4 0.5
TRANSP WIND DIR.SE S SE S S S S S S S S S
TRANSP WIND SPD.7 9 7 6 7 7 7 6 6 5 5 5
LVORI...........2 2 3 3 3 3 4 4 4 5 5 5
ADI.............19 4 3 3 3 3 3 3 3 2 2 2
VRATE KT-FT/1K..13 14 8 5 5 5 4 3 3 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 25 25 25 25 24
THURSDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 47.
MIN HUMIDITY........47 PERCENT.
DEWPOINT............28 INCREASING TO 33 LATE IN THE AFTERNOON.
MIN APPARENT TEMP...28.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING SOUTH 6 TO 9 MPH WITH
GUSTS TO AROUND 20 MPH EARLY.
WIND (20 FT)........SOUTH WINDS 5 TO 9 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTH 6 TO 9 MPH
WITH GUSTS TO AROUND 20 MPH EARLY.
MIXING HEIGHT.......2600 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 15 MPH INCREASING TO AROUND 16 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (35100 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................6 EARLY IN THE MORNING INCREASING TO 51 IN THE
AFTERNOON.
CEILING (KFT).......24.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........11 11 12 13 15 16 18 19 20 23 26 28
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............28 30 32 36 41 44 46 47 47 47 46 45
DEWPOINT........27 27 28 28 28 29 28 28 28 30 32 34
RH..............96 88 85 72 59 55 49 47 47 51 58 65
HEAT INDEX (F)..28 30 32 36 39 41 42 43 43 43 42 41
20 FT WIND DIR..S S S S S S S S S S S S
20 FT WIND SPD..1 1 2 2 3 6 7 8 9 9 8 7
20 FT WIND GUST.5 6 7 9 12 14 16 18 20 20 17 17
SURFACE WND DIR.S S S S S S S S S S S S
SURFACE WND SPD.1 1 2 2 3 6 7 8 9 9 8 7
SURFACE WND GST.5 6 7 9 12 14 16 18 20 20 17 17
MIX HGT (KFT)...0.7 1.1 1.5 1.8 2.1 2.3 2.5 2.6 2.6 2.6 2.5 2.3
TRANSP WIND DIR.S S S S S S S S S S S S
TRANSP WIND SPD.6 7 8 9 9 10 12 13 14 15 16 16
LVORI...........4 4 4 3 2 2 1 1 1 1 1 1
ADI.............6 10 16 22 24 30 36 41 41 44 51 47
VRATE KT-FT/1K..4 7 11 15 17 21 25 29 32 34 35 32
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...24 24 24 24 24 24 24 25 25 25 25 25
FORECASTER...FRANK
REQUESTED BY...MICHAEL MARQUARDT
TYPE OF REQUEST...PRESCRIBED
.TAG 2608984.0/BOX
.DELDT 04/07/26
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.MARQUARDT@MASS.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page