269
FNUS71 KBOX 040745
FWSBOX
SPOT FORECAST FOR BIRCH HILL DAM RX FIRE 6/4/2026...MASSWILDLIFE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
345 AM EDT THU JUN 4 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 EDT ON JUNE 04.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
SURFACE HIGH PRESSURE CONTRIBUTES TO THE CONTINUED DRY CONDITIONS
TODAY AND FRIDAY WITH TEMPERATURES CLIMBING INTO THE UPPER 80S TO
90 DEGREES. NEXT OPPORTUNITY FOR RAIN COMES LATE SATURDAY INTO
SUNDAY WITH THE PASSAGE OF A COLD FRONT.
TODAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........27 PERCENT.
DEWPOINT............49 INCREASING TO 52 THROUGH EARLY AFTERNOON,
THEN DECREASING TO 49 LATE IN THE AFTERNOON.
MAX APPARENT TEMP...84.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING WEST 5 TO 7 MPH EARLY.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING WEST 5 TO 7 MPH
EARLY.
MIXING HEIGHT.......6300 FT AGL.
TRANSPORT WINDS.....WEST 6 TO 12 MPH.
SMOKE DISPERSAL.....POOR (1800 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (62700 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................6 EARLY IN THE MORNING INCREASING TO 82 IN THE
AFTERNOON.
CEILING (KFT).......25.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 2 1 1 0 2 2 3 5 10 21 25
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............54 57 62 70 75 79 82 84 85 86 87 86
DEWPOINT........48 50 53 54 54 52 51 50 50 50 49 49
RH..............80 77 72 57 48 39 34 31 30 29 27 28
HEAT INDEX (F)..54 57 62 70 75 79 81 82 83 84 84 83
20 FT WIND DIR..N W W W W W W W W W W W
20 FT WIND SPD..1 2 2 2 3 5 6 6 7 7 7 7
20 FT WIND GUST.2 3 3 5 7 9 10 12 13 13 12 12
SURFACE WND DIR.N W W W W W W W W W W W
SURFACE WND SPD.1 2 2 2 3 5 6 6 7 7 7 7
SURFACE WND GST.2 3 3 5 7 9 10 12 13 13 12 12
MIX HGT (KFT)...0.4 0.4 0.6 0.9 1.8 3.3 4.8 5.8 6.2 6.3 5.5 4.9
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.6 6 7 7 8 9 9 12 12 12 12 12
LVORI...........4 4 3 3 2 1 1 1 1 1 1 1
ADI.............6 6 7 8 18 39 55 82 79 80 72 65
VRATE KT-FT/1K..2 2 3 5 12 27 38 58 63 63 55 49
VENTRATE CAT....PR PR PR PR PR PR PR FR GD GD FR FR
CEILING (KFT)...25 25 25 25 25 25 25 25 25 25 25 25
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........77 PERCENT.
DEWPOINT............51 DECREASING TO 48 EARLY IN THE MORNING.
MAX APPARENT TEMP...82.
SURFACE WINDS (MPH).WEST WINDS 5 TO 6 MPH IN THE EVENING BECOMING
LIGHT.
WIND (20 FT)........WEST WINDS 5 TO 6 MPH IN THE EVENING BECOMING
LIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 13 MPH.
SMOKE DISPERSAL.....GOOD (30900 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (2500 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................46 EARLY IN THE EVENING DECREASING TO 4 LATE IN
THE NIGHT.
CEILING (KFT).......25.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........11 21 16 11 17 21
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............84 76 66 62 57 56
DEWPOINT........51 52 50 50 49 49
RH..............32 43 56 65 75 77
HEAT INDEX (F)..82 76 66 62 57 56
20 FT WIND......W 6 W 5 W 3 W 2 W 2 W 2
20 FT WIND GUST.10 9 7 5 5 3
SURFACE WIND....W 6 W 5 W 3 W 2 W 2 W 2
SURFACE WND GST.10 9 7 5 5 3
MIX HGT (FT)....2800 500 400 400 400 400
TRANSPORT WIND..W 13 W 10 W 9 W 8 W 8 W 8
LVORI...........1 2 3 3 3 4
ADI.............46 5 4 4 4 4
VRATE KT-FT/1K..31 4 4 3 3 3
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
CEILING (KFT)...25 25 25 25 25 25
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........30 PERCENT.
DEWPOINT............51 INCREASING TO 53 IN THE LATE MORNING AND
AFTERNOON.
MAX APPARENT TEMP...85.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING WEST 5 TO 7 MPH IN THE
LATE MORNING AND AFTERNOON.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING WEST 5 TO 7 MPH
IN THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......7400 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 15 MPH.
SMOKE DISPERSAL.....POOR (2700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (96500 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................8 EARLY IN THE MORNING INCREASING TO 105 IN THE
AFTERNOON.
CEILING (KFT).......20 INCREASING TO 25 AROUND NOON, THEN
DECREASING TO 20 LATE IN THE AFTERNOON
DECREASING TO 15 LATE IN THE AFTERNOON.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........37 34 33 38 42 27
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............56 64 76 82 86 87
DEWPOINT........49 53 54 52 52 52
RH..............77 67 46 35 31 30
HEAT INDEX (F)..56 64 76 81 84 85
20 FT WIND......W 2 W 2 W 5 W 6 W 7 W 7
20 FT WIND GUST.5 5 8 12 13 14
SURFACE WIND....W 2 W 2 W 5 W 6 W 7 W 7
SURFACE WND GST.5 5 8 12 13 14
MIX HGT (FT)....400 800 3100 5700 6600 7200
TRANSPORT WIND..W 8 NW 8 NW 12 W 14 W 15 W 15
LVORI...........4 3 1 1 1 1
ADI.............8 8 46 96 105 105
VRATE KT-FT/1K..3 6 31 68 86 93
VENTRATE CAT....POOR POOR POOR GOOD GOOD GOOD
CEILING (KFT)...20 20 25 25 20 20
FORECASTER...DOOLEY
REQUESTED BY...ALEX ENTRUP
TYPE OF REQUEST...PRESCRIBED
.TAG 2614940.0/BOX
.DELDT 06/04/26
.FORMATTERVERSION 2.0.0
.EMAIL ALEX.ENTRUP@MASS.GOV
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