071
FNUS71 KBOX 210850
FWSBOX
SPOT FORECAST FOR WINIMUSSET WMA RX FIRE 5/21/2026...MASSWILDLIFE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
450 AM EDT THU MAY 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 EDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
LIGHT SHOWERS SHOULD COME TO AN END BY SUNRISE GIVING WAY TO A DRY
THURSDAY WITH N WINDS IN THE MORNING 5-10 KTS BECOMING NW IN THE
AFTERNOON. MINIMUM RELATIVE HUMIDITY WILL BE AROUND 35 PERCENT.
FRIDAY WILL BE DRY WITH LIGHT WINDS AND MINIMUM RELATIVE HUMIDITY
AROUND 29 PERCENT.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................3 PERCENT.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........35 PERCENT.
DEWPOINT............38.
MAX APPARENT TEMP...65.
SURFACE WINDS (MPH).NORTH WINDS 5 TO 7 MPH.
WIND (20 FT)........NORTH WINDS 5 TO 7 MPH.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....NORTH 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR (9000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (36000 KNOT-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................14 TO 52.
CEILING (KFT).......9.4 INCREASING TO 23.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........96 92 92 91 88 91 89 89 87 86 87 77
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 56 56 58 59 59 60 62 62 64 64 65
DEWPOINT........40 40 39 39 39 38 38 38 37 37 37 37
RH..............57 55 53 49 47 45 44 41 39 37 37 35
HEAT INDEX (F)..55 56 56 58 59 59 60 62 62 64 64 65
20 FT WIND DIR..N N N N N N N N N N NW N
20 FT WIND SPD..7 7 7 6 6 6 6 6 6 6 5 5
20 FT WIND GUST.15 14 14 13 12 10 10 10 10 9 9 8
SURFACE WND DIR.N N N N N N N N N N NW N
SURFACE WND SPD.7 7 7 6 6 6 6 6 6 6 5 5
SURFACE WND GST.15 14 14 13 12 10 10 10 10 9 9 8
MIX HGT (KFT)...0.9 1.9 2.0 2.1 2.6 3.0 3.3 3.6 3.9 4.3 4.5 4.4
TRANSP WIND DIR.N N N N N N NW NW NW NW NW N
TRANSP WIND SPD.12 13 12 10 9 8 9 9 9 9 9 9
LVORI...........2 1 2 2 2 2 1 1 1 1 1 1
ADI.............14 31 29 28 30 30 39 43 46 51 52 51
VRATE KT-FT/1K..9 21 20 19 21 21 26 29 31 35 36 35
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...9.7 9.4 12 12 14 15 18 21 23 23 24 24
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY THEN
BECOMING CLEAR THEN BECOMING PARTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 41.
MAX HUMIDITY........73 PERCENT.
DEWPOINT............36 DECREASING TO 33 EARLY IN THE MORNING.
MIN APPARENT TEMP...38.
SURFACE WINDS (MPH).NORTH WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING NORTHEAST AROUND
5 MPH EARLY IN THE MORNING.
WIND (20 FT)........NORTH WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING NORTHEAST AROUND
5 MPH EARLY IN THE MORNING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....NORTH 8 TO 10 MPH.
SMOKE DISPERSAL.....FAIR (24000 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3200 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............2.
ADI.................4 TO 36.
CEILING (KFT).......23 DECREASING TO 19.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........79 77 62 39 12 27
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............64 58 52 47 43 41
DEWPOINT........37 38 37 35 34 33
RH..............37 47 56 63 70 73
HEAT INDEX (F)..64 58 52 46 40 38
20 FT WIND......N 5 N 3 N 3 N 3 NE 5 NE 5
20 FT WIND GUST.8 7 8 9 10 12
SURFACE WIND....N 5 N 3 N 3 N 3 NE 5 NE 5
SURFACE WND GST.8 7 8 9 10 12
MIX HGT (FT)....3000 600 500 600 500 400
TRANSPORT WIND..N 9 N 9 N 9 N 10 NE 9 NE 9
LVORI...........1 2 2 3 3 3
ADI.............36 4 4 5 4 4
VRATE KT-FT/1K..24 5 4 5 4 3
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
CEILING (KFT)...23 24 24 23 20 19
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........29 PERCENT.
DEWPOINT............34.
MIN APPARENT TEMP...38.
SURFACE WINDS (MPH).NORTHEAST WINDS 5 TO 6 MPH IN THE MORNING
BECOMING LIGHT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 6 MPH IN THE MORNING
BECOMING LIGHT.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 6 TO 14 MPH.
SMOKE DISPERSAL.....POOR (4000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (42000 KNOT-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................9 EARLY IN THE MORNING INCREASING TO 58 IN THE
AFTERNOON.
CEILING (KFT).......18.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........30 13 28 39 55 33
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............41 48 55 62 66 68
DEWPOINT........33 35 34 34 35 35
RH..............73 60 45 35 32 29
HEAT INDEX (F)..38 45 55 62 66 68
20 FT WIND......NE 5 NE 6 NE 6 E 5 E 3 E 2
20 FT WIND GUST.12 13 12 9 7 5
SURFACE WIND....NE 5 NE 6 NE 6 E 5 E 3 E 2
SURFACE WND GST.12 13 12 9 7 5
MIX HGT (FT)....500 2300 4000 4800 5300 6100
TRANSPORT WIND..NE 9 E 14 NE 10 NE 9 NE 7 NE 7
LVORI...........3 1 1 1 1 1
ADI.............9 40 53 55 46 51
VRATE KT-FT/1K..4 27 36 38 32 36
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
CEILING (KFT)...19 19 19 18 18 18
FORECASTER...BRW
REQUESTED BY...ALEX ENTRUP
TYPE OF REQUEST...PRESCRIBED
.TAG 2614194.0/BOX
.DELDT 05/21/26
.FORMATTERVERSION 2.0.0
.EMAIL ALEX.ENTRUP@MASS.GOV
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