438
FNUS71 KBOX 191044
FWSBOX
SPOT FORECAST FOR LEYDEN WMA PRESCRIBED FIRE...MASSWILDLIFE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
544 AM EST WED NOV 19 2025
FORECAST IS BASED ON IGNITION TIME OF 1000 EST ON NOVEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
DRY CONDITIONS DUE TO AN AREA OF HIGH PRESSURE DEVELOPING THROUGHOUT
SOUTHERN NEW ENGLAND TODAY INTO THURSDAY. NORTHWEST WIND TODAY WITH
GUSTS LESS THAN 15 MPH, FOLLOWED UP WITH LIGHT AND VARIABLE WINDS ON
THURSDAY.
MINIMUM RELATIVE HUMIDITY VALUES TODAY AND THURSDAY ARE BETWEEN 45
AND 55 PERCENT.
OUTLOOK...FRIDAY NIGHT THROUGH TUESDAY
A COLD FRONT WILL BRING A PERIOD OF UNSETTLED WEATHER LATE FRIDAY
INTO EARLY SATURDAY, THEN HIGH PRESSURE RETURNS SUNDAY INTO EARLY
NEXT WEEK.
REST OF TODAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 43.
MIN HUMIDITY........46 PERCENT.
DEWPOINT............24.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......3600 FT AGL.
TRANSPORT WINDS.....NORTHWEST 6 TO 8 MPH.
SMOKE DISPERSAL.....POOR (1700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (21700 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................3 TO 30.
CEILING (KFT).......24.
TIME (EST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 18 14 14 18 14 10 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............34 37 39 42 42 43 41 39
DEWPOINT........25 25 24 24 23 24 24 23
RH..............69 59 50 48 46 47 50 52
20 FT WIND DIR..NW NW NW NW NW N N N
20 FT WIND SPD..2 2 2 2 2 2 2 1
20 FT WIND GUST.5 7 7 7 7 7 5 5
SURFACE WND DIR.NW NW NW NW NW N N N
SURFACE WND SPD.2 2 2 2 2 2 2 1
SURFACE WND GST.5 7 7 7 7 7 5 5
MIX HGT (KFT)...2.2 2.9 3.4 3.6 3.3 2.8 0.5 0.3
TRANSP WIND DIR.NW NW NW NW NW NW N N
TRANSP WIND SPD.7 8 7 7 6 6 6 6
LVORI...........3 2 2 2 2 2 2 2
ADI.............19 29 28 30 23 20 3 3
VRATE KT-FT/1K..13 20 20 22 16 14 3 2
VENTRATE CAT....PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 25 25 24 24 24 24
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR THEN BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 20.
MAX HUMIDITY........100 PERCENT.
DEWPOINT............22.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 7 MPH.
SMOKE DISPERSAL.....POOR (1200 KNOT-FT).
LVORI...............7.
ADI.................2 TO 3.
CEILING (KFT).......23 DECREASING TO 19.
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........7 7 9 8 10 13 20 26 32 41 43 56
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............35 29 27 26 25 24 23 23 22 22 21 21
DEWPOINT........23 24 23 22 22 21 21 21 21 20 21 20
RH..............61 81 85 85 88 88 92 92 96 92 100 96
20 FT WIND DIR..N N N N N N N N N N N N
20 FT WIND SPD..1 1 1 1 1 1 1 1 1 1 2 2
20 FT WIND GUST.3 3 3 3 3 3 3 3 3 3 3 3
SURFACE WND DIR.N N N N N N N N N N N N
SURFACE WND SPD.1 1 1 1 1 1 1 1 1 1 2 2
SURFACE WND GST.3 3 3 3 3 3 3 3 3 3 3 3
MIX HGT (KFT)...0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
TRANSP WIND DIR.N N N N N N N N N N N N
TRANSP WIND SPD.6 7 5 5 6 5 5 5 5 5 5 6
LVORI...........3 5 5 5 6 6 7 7 8 7 10 8
ADI.............3 3 2 2 3 2 2 2 2 2 2 3
VRATE KT-FT/1K..2 2 1 1 2 1 1 1 1 1 1 2
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 24 25 25 25 23 22 21 20 19 19
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 44.
MIN HUMIDITY........43 PERCENT.
DEWPOINT............22.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......2400 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 6 MPH SHIFTING TO THE SOUTHWEST
AROUND 5 MPH EARLY IN THE AFTERNOON, THEN
SHIFTING TO THE SOUTHEAST LATE IN THE
AFTERNOON.
SMOKE DISPERSAL.....POOR (400 KNOT-FT).
LVORI...............5.
ADI.................2 TO 13.
CEILING (KFT).......18 DECREASING TO 15 THROUGH EARLY AFTERNOON,
THEN INCREASING TO 20 IN THE AFTERNOON.
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........56 63 65 61 58 55 53 51 44 38 31 29
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............21 23 25 29 33 37 41 43 43 42 40 37
DEWPOINT........20 20 20 21 22 22 22 22 23 23 24 24
RH..............96 88 81 72 63 54 46 43 45 46 52 59
20 FT WIND DIR..N N N N N NE E SE SE SE SE S
20 FT WIND SPD..2 2 2 2 2 2 2 2 2 2 2 2
20 FT WIND GUST.3 5 3 3 3 3 5 5 5 5 3 3
SURFACE WND DIR.N N N N N NE E SE SE SE SE S
SURFACE WND SPD.2 2 2 2 2 2 2 2 2 2 2 2
SURFACE WND GST.3 5 3 3 3 3 5 5 5 5 3 3
MIX HGT (KFT)...0.3 0.3 0.8 1.1 1.3 1.8 2.3 2.4 1.9 1.0 0.3 0.1
TRANSP WIND DIR.N N N N N NW SW S S S SE S
TRANSP WIND SPD.5 6 5 5 5 5 5 5 5 5 5 5
LVORI...........8 5 4 3 3 2 2 2 2 2 2 3
ADI.............2 6 5 7 8 11 13 13 11 6 2 2
VRATE KT-FT/1K..1 1 3 4 5 7 9 10 7 4 1 0
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...18 20 15 15 15 15 15 20 20 20 20 20
FORECASTER...DOOLEY
REQUESTED BY...BENJAMIN MAZZEI
TYPE OF REQUEST...PRESCRIBED
.TAG 2526370.0/BOX
.DELDT 11/19/25
.FORMATTERVERSION 2.0.0
.EMAIL BEN.MAZZEI@MASS.GOV
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