012
FNUS71 KBOX 190905
FWSBOX
SPOT FORECAST FOR LEYDEN WMA PRESCRIBED FIRE...MASSWILDLIFE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
405 AM EST WED NOV 19 2025
FORECAST IS BASED ON IGNITION TIME OF 0900 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........50 PERCENT.
DEWPOINT............24.
MIN APPARENT TEMP...32.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......2800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 6 TO 8 MPH.
SMOKE DISPERSAL.....POOR (300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (19900 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................3 TO 28.
CEILING (KFT).......24.
TIME (EST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........17 18 13 11 8 6 5 6 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0
TEMP............32 36 38 40 41 41 42 39 37
DEWPOINT........25 25 25 25 25 25 25 25 24
RH..............75 64 59 55 52 52 50 57 59
HEAT INDEX (F)..32 36 38 38 39 39 40 37 37
20 FT WIND DIR..NW NW NW NW NW NW NW NW N
20 FT WIND SPD..2 2 2 3 3 3 3 3 2
20 FT WIND GUST.6 7 7 8 8 8 7 6 6
SURFACE WND DIR.NW NW NW NW NW NW NW NW N
SURFACE WND SPD.2 2 2 3 3 3 3 3 2
SURFACE WND GST.6 7 7 8 8 8 7 6 6
MIX HGT (KFT)...0.9 1.4 2.1 2.4 2.8 2.8 2.4 0.1 0.1
TRANSP WIND DIR.NW NW NW NW NW NW NW N N
TRANSP WIND SPD.7 8 8 8 8 8 8 6 6
LVORI...........3 2 2 2 2 2 2 3 3
ADI.............8 15 22 25 28 28 25 3 3
VRATE KT-FT/1K..5 10 15 17 20 20 17 1 0
VENTRATE CAT....PR PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 25 25 25 25 24 24 24
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR THEN BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 23.
MAX HUMIDITY........88 PERCENT.
DEWPOINT............22.
MIN APPARENT TEMP...20.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 7 MPH.
SMOKE DISPERSAL.....POOR (0 KNOT-FT).
LVORI...............5.
ADI.................2 TO 3.
CEILING (KFT).......24 DECREASING TO 19.
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 6 8 6 7 16 24 30 35 36 42 56
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............34 31 29 28 28 27 26 26 25 25 24 24
DEWPOINT........24 24 24 24 23 22 22 21 21 21 21 20
RH..............66 75 81 85 81 81 85 81 84 84 88 84
HEAT INDEX (F)..34 31 29 28 28 23 22 22 21 21 20 20
20 FT WIND DIR..N N N N N N N N N N N N
20 FT WIND SPD..2 2 2 2 2 3 3 3 3 3 3 3
20 FT WIND GUST.5 6 6 6 7 7 7 8 8 8 8 8
SURFACE WND DIR.N N N N N N N N N N N N
SURFACE WND SPD.2 2 2 2 2 3 3 3 3 3 3 3
SURFACE WND GST.5 6 6 6 7 7 7 8 8 8 8 8
MIX HGT (KFT)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.N N N N N N N N N N N N
TRANSP WIND SPD.7 7 7 6 6 6 5 6 7 6 6 6
LVORI...........3 3 5 5 5 5 5 5 5 5 6 5
ADI.............3 3 3 3 3 3 2 3 3 3 3 3
VRATE KT-FT/1K..0 0 0 0 0 0 0 0 0 0 0 0
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 24 25 25 25 24 22 21 21 20 19
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 42.
MIN HUMIDITY........50 PERCENT.
DEWPOINT............22 INCREASING TO 25 LATE IN THE AFTERNOON.
MIN APPARENT TEMP...18.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTHEAST AROUND 5 MPH
EARLY IN THE MORNING, THEN BECOMING LIGHT
THROUGH EARLY AFTERNOON.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST AROUND 5 MPH
EARLY IN THE MORNING, THEN BECOMING LIGHT
THROUGH EARLY AFTERNOON.
MIXING HEIGHT.......2200 FT AGL.
TRANSPORT WINDS.....NORTHEAST 5 TO 6 MPH SHIFTING TO THE SOUTH 3 TO
5 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (0 KNOT-FT).
LVORI...............4.
ADI.................2 TO 12.
CEILING (KFT).......18 DECREASING TO 15 EARLY, THEN INCREASING TO
20 EARLY.
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........60 71 64 64 64 60 55 51 43 35 27 27
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............23 24 26 29 33 36 38 40 40 40 39 36
DEWPOINT........20 21 22 23 23 23 23 23 24 24 25 25
RH..............88 88 85 78 66 59 54 50 52 52 57 64
HEAT INDEX (F)..18 18 26 29 33 36 38 40 40 40 39 36
20 FT WIND DIR..N NE N N N NW SW S S S S S
20 FT WIND SPD..3 5 3 3 2 2 2 2 2 2 2 2
20 FT WIND GUST.8 8 7 6 5 5 5 5 5 3 3 3
SURFACE WND DIR.N NE N N N NW SW S S S S S
SURFACE WND SPD.3 5 3 3 2 2 2 2 2 2 2 2
SURFACE WND GST.8 8 7 6 5 5 5 5 5 3 3 3
MIX HGT (KFT)...0.1 0.1 0.4 0.8 1.1 1.6 2.0 2.2 1.6 0.7 0.1 0.1
TRANSP WIND DIR.N NE N NE NE E SE S S S S S
TRANSP WIND SPD.6 6 5 5 5 5 5 5 5 3 3 3
LVORI...........6 6 5 4 3 2 2 2 2 2 3 3
ADI.............3 4 5 5 7 10 12 12 9 4 2 2
VRATE KT-FT/1K..0 0 2 3 4 7 8 9 6 2 0 0
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...18 20 15 15 15 20 20 20 20 20 20 20
FORECASTER...DOOLEY
REQUESTED BY...BENJAMIN MAZZEI
TYPE OF REQUEST...PRESCRIBED
.TAG 2526357.0/BOX
.DELDT 11/19/25
.FORMATTERVERSION 2.0.0
.EMAIL BEN.MAZZEI@MASS.GOV
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