358
FNUS71 KBOX 181154
FWSBOX
SPOT FORECAST FOR CPED-RX FMZ09-20250418-01...MASSACHUSETTS ARMY NATIONAL GUARD
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
754 AM EDT FRI APR 18 2025
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON APRIL 18.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
WINDS ON FRIDAY WILL BE FROM THE SOUTHWEST. THEY WILL START
BETWEEN 5 AND 10 MPH, AND THEN GRADUALLY INCREASE TO BETWEEN 12
AND 17 MPH WITH GUSTS UP TO 22 MPH BY THE AFTERNOON. RELATIVE
HUMIDITY VALUES WILL DROP TO BETWEEN 30 AND 35 PERCENT BY THE
AFTERNOON. SKY CONDITIONS WILL BE MAINLY CLEAR FOR THE FIRST HALF
OF THE DAY WITH CLOUDS INCREASING LATER IN THE AFTERNOON.
FOR SATURDAY, SOUTHWEST WINDS WILL INCREASE TO 15 TO 20 MPH WITH
GUSTS UP TO 30 MPH. RELATIVE HUMIDITY VALUES WILL FALL TO BETWEEN
65 AND 70 PERCENT. THERE WILL BE A SLIGHT CHANCE OF RAIN SHOWERS
LATER IN THE AFTERNOON, BUT CHANCES ARE FAIRLY LOW. SKIES WILL BE
MOSTLY CLOUDY THROUGHOUT THE DAY ON SATURDAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 56.
MIN HUMIDITY........37 PERCENT.
DEWPOINT............30.
MAX APPARENT TEMP...55.
SURFACE WINDS (MPH).SOUTHWEST WINDS 6 TO 15 MPH.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 15 MPH.
MIXING HEIGHT.......2300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 18 MPH INCREASING TO 21 TO 23
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (15200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (33300 KNOT-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................23 INCREASING TO 35 TO 43 EARLY, THEN
INCREASING TO 40 TO 48 EARLY IN THE AFTERNOON
DECREASING TO 31 TO 35 LATE IN THE AFTERNOON.
CEILING (KFT).......25 DECREASING TO 20 LATE IN THE AFTERNOON.
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 3 7 17 22 16 29 48
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............53 54 55 55 55 55 54 52
DEWPOINT........30 29 29 29 29 30 31 32
RH..............41 38 37 37 37 38 41 46
HEAT INDEX (F)..53 54 55 55 55 55 54 52
20 FT WIND DIR..S S SW SW SW SW SW SW
20 FT WIND SPD..6 8 9 12 13 14 15 15
20 FT WIND GUST.9 13 16 20 22 23 23 25
SURFACE WND DIR.S S SW SW SW SW SW SW
SURFACE WND SPD.6 8 9 12 13 14 15 15
SURFACE WND GST.9 13 16 20 22 23 23 25
MIX HGT (KFT)...1.7 2.2 2.3 2.1 1.8 1.6 1.3 1.1
TRANSP WIND DIR.SW S SW SW SW SW SW SW
TRANSP WIND SPD.10 13 16 18 21 23 23 23
LVORI...........2 1 1 1 1 1 1 1
ADI.............23 35 43 46 48 40 35 31
VRATE KT-FT/1K..15 24 32 33 33 33 27 21
VENTRATE CAT....PR PR PR PR PR PR PR PR
CEILING (KFT)...25 25 25 25 25 25 25 20
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 46.
MAX HUMIDITY........89 PERCENT.
DEWPOINT............35 INCREASING TO 44.
MAX APPARENT TEMP...51.
SURFACE WINDS (MPH).SOUTHWEST WINDS 14 TO 16 MPH WITH GUSTS TO
AROUND 28 MPH.
WIND (20 FT)........SOUTHWEST WINDS 14 TO 16 MPH WITH GUSTS TO
AROUND 28 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 21 TO 24 MPH.
SMOKE DISPERSAL.....FAIR (17000 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (10700 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................19 TO 27.
CEILING (KFT).......15 DECREASING TO 11 UNTIL JUST AFTER MIDNIGHT,
THEN INCREASING TO 14 EARLY IN THE MORNING.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........67 79 81 79 76 74 67 61 55 61 66 72
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............51 50 48 48 48 48 48 48 48 49 49 49
DEWPOINT........33 34 34 36 37 38 39 41 42 43 45 46
RH..............50 54 58 63 65 68 71 77 80 80 86 89
HEAT INDEX (F)..51 45 42 42 42 42 42 42 42 43 43 43
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..14 14 15 15 15 14 14 14 14 15 15 16
20 FT WIND GUST.23 23 23 23 24 25 25 25 25 26 28 28
SURFACE WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.14 14 15 15 15 14 14 14 14 15 15 16
SURFACE WND GST.23 23 23 23 24 25 25 25 25 26 28 28
MIX HGT (KFT)...0.9 0.7 0.7 0.7 0.8 0.7 0.7 0.6 0.7 0.5 0.8 0.8
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.23 21 21 23 24 24 23 23 24 23 23 24
LVORI...........2 2 2 2 3 3 3 3 3 3 4 4
ADI.............27 19 19 21 22 22 21 21 22 21 21 22
VRATE KT-FT/1K..17 12 12 15 16 14 14 11 14 11 15 16
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...15 15 12 12 12 12 12 11 11 12 13 14
SATURDAY
SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........69 PERCENT.
DEWPOINT............48.
MAX APPARENT TEMP...60.
SURFACE WINDS (MPH).SOUTHWEST WINDS 16 TO 18 MPH WITH GUSTS TO
AROUND 31 MPH.
WIND (20 FT)........SOUTHWEST WINDS 16 TO 18 MPH WITH GUSTS TO
AROUND 31 MPH.
MIXING HEIGHT.......1300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 24 TO 31 MPH.
SMOKE DISPERSAL.....FAIR (15700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (35100 KNOT-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................27 TO 32 INCREASING TO 41 TO 47 IN THE LATE
MORNING AND EARLY AFTERNOON, THEN DECREASING TO
32 TO 37 LATE IN THE AFTERNOON.
CEILING (KFT).......15 INCREASING TO 20 LATE IN THE MORNING, THEN
DECREASING TO 15 DECREASING TO 10 EARLY
DECREASING TO 9.0 INCREASING TO 10 LATE IN THE
AFTERNOON.
TIME (EDT) 6 AM 10 AM 2 PM
SKY (%).........71 70 57
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE
TSTM COV........
CWR.............0 0 0
TEMP............49 57 60
DEWPOINT........46 49 50
RH..............89 75 69
HEAT INDEX (F)..43 57 60
20 FT WIND......SW 16G28 SW 18G31 SW 18G31
SURFACE WIND....SW 16G28 SW 18G31 SW 18G31
MIX HGT (FT)....700 1300 1200
TRANSPORT WIND..SW 24 SW 31 SW 29
LVORI...........4 3 1
ADI.............27 46 41
VRATE KT-FT/1K..16 35 30
VENTRATE CAT....POOR POOR POOR
CEILING (KFT)...15 15 10
FORECASTER...FT
REQUESTED BY...JOEL CARLSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2510988.0/BOX
.DELDT 04/18/25
.FORMATTERVERSION 2.0.0
.EMAIL JOEL.CARLSON@MASS.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page