614
FNUS71 KBOX 161300
FWSBOX
SPOT FORECAST FOR LYMAN...MASS DCR
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
900 AM EDT WED APR 16 2025
FORECAST IS BASED ON IGNITION TIME OF 0950 EDT ON APRIL 16.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
NO PRECIPITATION EXPECTED TODAY THROUGH THURSDAY. GUSTY WEST WINDS
TODAY, GENERALLY 25-30 MPH, BUT A FEW GUSTS NEAR 35 MPH ARE
POSSIBLE. HUMIDITY VALUES WILL DROP TO NEAR 40 PERCENT, AND
POSSIBLY AS LOW AS 35-38% THIS AFTERNOON. GUSTY WINDS DIMINISH
SLOWLY THIS EVENING. HUMIDITY RECOVERY OF 80-85 PERCENT. THURSDAY
WILL BE SUNNY WITH LESS WIND AND LOWER RELATIVE HUMIDITY VALUES.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 52.
MIN HUMIDITY........42 PERCENT.
DEWPOINT............30.
MIN APPARENT TEMP...37.
SURFACE WINDS (MPH).WEST WINDS 14 TO 15 MPH WITH GUSTS TO AROUND 29
MPH.
WIND (20 FT)........WEST WINDS 14 TO 15 MPH WITH GUSTS TO AROUND 29
MPH.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....WEST AROUND 29 MPH.
SMOKE DISPERSAL.....EXCELLENT (107900 KNOT-FT).
LVORI...............1.
CEILING (KFT).......4000-6000 FEET.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........55 73 77 78 76 76 78 68 69
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0
TEMP............44 46 47 49 49 51 51 51 50
DEWPOINT........32 30 30 30 30 30 30 29 29
RH..............62 53 51 48 48 44 44 42 44
HEAT INDEX (F)..37 40 41 44 43 51 51 51 45
20 FT WIND DIR..W W W W W W W W W
20 FT WIND SPD..14 14 14 14 15 15 15 15 14
20 FT WIND GUST.26 28 29 29 29 29 29 28 28
SURFACE WND DIR.W W W W W W W W W
SURFACE WND SPD.14 14 14 14 15 15 15 15 14
SURFACE WND GST.26 28 29 29 29 29 29 28 28
MIX HGT (KFT)...4.2 4.9 5.5 5.6 5.6 5.7 5.6 5.6 5.6
TRANSP WIND DIR.W W W W W W W W W
TRANSP WIND SPD.29 29 29 29 29 29 29 29 29
LVORI...........1 1 1 1 1 1 1 1 1
ADI.............M M M M M M M M M
VRATE KT-FT/1K..108 123 137 138 139 142 139 138 138
VENTRATE CAT....VGD VGD VGD VGD VGD VGD VGD VGD VGD
CEILING (KFT)...6.0 5.0 5.0 4.0 4.0 4.0 4.5 5.0 6.0
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 35.
MAX HUMIDITY........82 PERCENT.
DEWPOINT............29.
MIN APPARENT TEMP...29.
SURFACE WINDS (MPH).WEST WINDS 7 TO 13 MPH. GUSTS UP TO 26 MPH
UNTIL EARLY MORNING.
WIND (20 FT)........WEST WINDS 7 TO 13 MPH. GUSTS UP TO 26 MPH
UNTIL EARLY MORNING.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 25 MPH DECREASING TO AROUND 14 MPH
EARLY IN THE MORNING.
SMOKE DISPERSAL.....EXCELLENT (96700 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (9000 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
CEILING (KFT).......6000 TO 12000 FEET.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........64 57 48 51 51 40 34 28 21 18 15 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............48 46 44 41 40 39 38 37 36 36 35 35
DEWPOINT........29 30 30 29 29 29 29 29 29 29 30 30
RH..............47 53 57 62 64 67 70 72 75 75 82 82
HEAT INDEX (F)..43 41 38 35 34 33 32 31 30 30 29 29
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..13 12 10 9 9 9 8 8 8 7 7 7
20 FT WIND GUST.26 25 22 22 21 20 20 21 20 17 16 16
SURFACE WND DIR.W W W W W W W W W W W W
SURFACE WND SPD.13 12 10 9 9 9 8 8 8 7 7 7
SURFACE WND GST.26 25 22 22 21 20 20 21 20 17 16 16
MIX HGT (KFT)...4.4 3.3 2.2 2.1 1.8 1.6 1.2 0.9 0.8 0.7 0.8 0.7
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.25 24 22 22 21 22 20 18 16 16 16 14
LVORI...........1 1 2 2 2 3 3 3 4 4 4 4
ADI.............M M M M M M M M M M M M
VRATE KT-FT/1K..97 68 43 40 34 30 21 14 11 10 10 9
VENTRATE CAT....GD GD FR FR PR PR PR PR PR PR PR PR
CEILING (KFT)...6.0 7.0 7.0 7.0 8.0 11 25 20 20 20 20 20
THURSDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 56.
MIN HUMIDITY........37 PERCENT.
DEWPOINT............30.
MIN APPARENT TEMP...29.
SURFACE WINDS (MPH).WEST WINDS 7 TO 9 MPH.
WIND (20 FT)........WEST WINDS 7 TO 9 MPH.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 21 MPH.
SMOKE DISPERSAL.....POOR (12500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (108200 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (115900
KNOT-FT) LATE IN THE AFTERNOON.
LVORI...............2.
CEILING (KFT).......AT OR ABOVE 11000 FEET.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........9 6 3 4 5 5 11 16 21 19 17 15
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............35 36 39 42 46 49 51 53 54 55 56 55
DEWPOINT........30 31 30 30 31 31 31 31 31 30 30 29
RH..............82 82 70 62 55 50 46 43 41 38 37 37
HEAT INDEX (F)..29 30 33 37 42 46 51 53 54 55 56 55
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..7 8 8 8 8 8 8 9 9 9 9 8
20 FT WIND GUST.16 16 17 16 16 15 16 16 16 16 17 17
SURFACE WND DIR.W W W W W W W W W W W W
SURFACE WND SPD.7 8 8 8 8 8 8 9 9 9 9 8
SURFACE WND GST.16 16 17 16 16 15 16 16 16 16 17 17
MIX HGT (KFT)...0.9 1.4 1.9 3.2 3.6 4.0 4.8 5.5 6.2 6.3 6.4 6.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.16 17 20 18 17 16 16 17 17 18 20 21
LVORI...........3 3 3 1 1 1 1 1 1 1 1 1
ADI.............M M M M M M M M M M M M
VRATE KT-FT/1K..13 22 32 51 54 57 68 80 93 101 108 116
VENTRATE CAT....PR PR PR FR FR FR GD GD GD VGD VGD VGD
CEILING (KFT)...20 20 15 25 14 14 13 12 11 12 13 13
FORECASTER...NASH
REQUESTED BY...MICHAEL MARQUARDT
TYPE OF REQUEST...PRESCRIBED
.TAG 2510163.1/BOX
.DELDT 04/16/25
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.MARQUARDT@MASS.GOV
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