497
FNUS71 KBOX 262333
FWSBOX
SPOT FORECAST FOR SANDISFIELD PROPANE TANK LEAK...MASSACHUSETTS EMERGENCY MANAGEMENT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
733 PM EDT THU MAR 26 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 EDT ON MARCH 26.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
SCATTERED SHOWERS BEGIN THIS EVENING AROUND 8PM TRANSITIONING TO
MORE OF A MODERATE TO PERHAPS HEAVY AT TIMES AROUND 9. RAIN WILL
TAPER TO SHOWERS AROUND 2AM. THE RISK FOR SHOWERS LOWERS
CONSIDERABLY AFTER 4AM. WINDS WILL START FROM THE SOUTHWEST AT
8-13 MPH WITH GUSTS UP TO 23 MPH. WINDS GRADUALLY SHIFT TO THE
WEST AT SIMILAR SPEEDS AROUND MIDNIGHT THEN BECOME MORE
NORTHWESTERLY BY 1-2 AM FRIDAY.
FOR FRIDAY, EXPECTING A LOW CHANCE OF SHOWERS IN THE MORNING
BEFORE CONDITIONS QUICKLY DRY OUT. WINDS WILL BE FROM THE
NORTHWEST INCREASING TO 10-15 MPH WITH GUSTS AS HIGH AS 25 MPH
DURING THE DAY. EXPECTING A DEEP MIXED LAYER WITH MIXING HEIGHTS
INCREASING TO 4000-4500 FEET BY THE AFTERNOON.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. RAIN. PATCHY FOG IN THE LATE
EVENING AND EARLY MORNING.
CWR.................80 PERCENT DECREASING TO 7 PERCENT.
CHANCE OF PCPN......80 PERCENT.
CHANCE OF THUNDER...9 PERCENT.
MIN TEMPERATURE.....AROUND 37.
MAX HUMIDITY........96 PERCENT.
DEWPOINT............49 DECREASING TO 44 LATE IN THE NIGHT.
SURFACE WINDS (MPH).SOUTHWEST WINDS 6 TO 8 MPH WITH GUSTS TO AROUND
20 MPH SHIFTING TO THE NORTHWEST 7 TO 8 MPH
WITH GUSTS TO AROUND 20 MPH LATE IN THE NIGHT.
MIXING HEIGHT.......900 FT AGL.
SMOKE DISPERSAL.....FAIR (19300 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (11200 KNOT-FT) LATE IN THE
NIGHT.
SMOKE DISPERSAL.....FAIR (19300 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (11200 KNOT-FT) LATE IN THE
NIGHT.
CEILING (KFT).......4.8 DECREASING TO 3.3 LATE IN THE EVENING, THEN
DECREASING TO 2.6 DECREASING TO 1.6 INCREASING
TO 1.8 DECREASING TO 1.7 LATE IN THE NIGHT.
VISIBILITY..........5 INCREASING TO 8 LATE IN THE NIGHT.
TRANSPORT WINDS.....SOUTHWEST 12 TO 13 MPH SHIFTING TO THE
NORTHWEST 14 TO 18 MPH AFTER MIDNIGHT.
LVORI...............6.
ADI.................8 TO 16.
TIME (EDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........88 89 83 87 88 86 85 85 79 78
WEATHER COV.....DEF DEF LKY DEF DEF LKY LKY CHC CHC SCH
WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN
TSTM COV........
CWR.............80 80 70 80 80 50 0 10 10 10
CHC OF PCPN (%).70 70 70 80 70 60 50 40 40 30
CHC OF THDR (%).10 10 10 10 10 10 0 0 0 0
TEMP............57 54 54 53 52 52 51 49 47 46
DEWPOINT........49 50 51 51 51 51 49 47 45 43
RH..............75 86 90 93 96 96 93 93 93 89
SURFACE WND DIR.S SW SW W W NW NW NW NW NW
SURFACE WND SPD.6 7 8 8 8 7 7 7 7 8
SURFACE WND GST.18 20 20 20 18 18 17 18 20 20
MIX HGT (KFT)...1.3 1.5 1.3 1.3 1.2 1.2 0.9 1.1 0.9 1.2
TRANSP WIND DIR.SW SW SW W W NW NW NW NW NW
TRANSP WIND SPD.13 12 13 13 14 15 15 14 16 18
LVORI...........3 4 4 5 6 8 6 6 6 5
ADI.............8 8 14 11 12 10 10 9 11 16
VRATE KT-FT/1K..14 15 15 14 14 16 11 13 13 19
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR
SDSPL KT-FT/100014 15 15 14 14 16 11 13 13 19
CEILING (KFT)...4.8 3.7 3.3 2.6 1.6 2.1 1.8 2.2 1.7 1.7
VISIBILITY (SM).5 5 5 5 5 6 8 9 8 9
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
SLIGHT CHANCE OF RAIN EARLY IN THE MORNING.
CWR.................7 PERCENT.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 44.
MIN HUMIDITY........39 PERCENT.
DEWPOINT............39 DECREASING TO 20.
SURFACE WINDS (MPH).NORTH WINDS 6 TO 10 MPH. GUSTS UP TO 23 MPH
THROUGH EARLY AFTERNOON.
MIXING HEIGHT.......4100 FT AGL.
SMOKE DISPERSAL.....FAIR (29300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (65600 KNOT-FT) IN THE
AFTERNOON.
SMOKE DISPERSAL.....FAIR (29300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (65600 KNOT-FT) IN THE
AFTERNOON.
CEILING (KFT).......1.9 INCREASING TO 21.
VISIBILITY..........9.
TRANSPORT WINDS.....NORTH 16 TO 25 MPH.
LVORI...............4.
ADI.................1 EARLY IN THE MORNING INCREASING TO 85 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........85 87 86 76 78 76 66 52 53 50 46 27
WEATHER COV.....SCH SCH SCH
WEATHER TYPE....RN RN RN
TSTM COV........
CWR.............10 10 10 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).30 20 10 10 10 10 10 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 41 39 38 40 42 41 41 42 42 42 41
DEWPOINT........41 38 35 33 31 29 27 25 22 21 19 18
RH..............96 89 85 82 70 60 57 53 45 43 39 39
SURFACE WND DIR.NW N N N N N N N N N N N
SURFACE WND SPD.9 9 10 10 10 9 9 9 8 7 6 6
SURFACE WND GST.22 22 23 23 22 21 20 20 17 16 15 13
MIX HGT (KFT)...1.6 2.0 2.4 2.7 2.9 3.1 3.3 3.5 3.6 3.8 4.0 4.1
TRANSP WIND DIR.NW NW N N N N N N N N N N
TRANSP WIND SPD.21 22 23 24 25 23 23 21 20 18 17 16
LVORI...........5 7 6 6 3 1 1 1 1 1 1 1
ADI.............23 1 1 1 59 56 58 54 85 84 82 78
VRATE KT-FT/1K..29 38 49 56 63 62 66 63 61 61 60 57
VENTRATE CAT....PR PR FR FR GD GD GD GD GD GD FR FR
SDSPL KT-FT/100029 38 49 56 63 62 66 63 61 61 60 57
CEILING (KFT)...1.9 3.2 3.9 5.3 7.6 21 21 21 21 22 22 23
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................3 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 22.
MAX HUMIDITY........58 PERCENT.
DEWPOINT............16 DECREASING TO 11 EARLY IN THE MORNING.
SURFACE WINDS (MPH).NORTH WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING NORTH AROUND 5
MPH EARLY IN THE MORNING.
MIXING HEIGHT.......600 FT AGL.
SMOKE DISPERSAL.....GOOD (40600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3000 KNOT-FT) LATE IN THE
NIGHT.
SMOKE DISPERSAL.....GOOD (40600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3000 KNOT-FT) LATE IN THE
NIGHT.
CEILING (KFT).......24 DECREASING TO 14.
VISIBILITY..........9.
TRANSPORT WINDS.....NORTH 6 TO 14 MPH.
LVORI...............2.
ADI.................57 EARLY IN THE EVENING DECREASING TO 3 LATE IN
THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........30 31 22 20 23 25 33 41 49 46 44 41
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 10 10 10 10 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............39 36 34 32 31 30 29 28 27 26 25 24
DEWPOINT........18 17 17 17 17 17 16 15 14 13 11 10
RH..............42 45 49 53 56 58 58 58 57 57 55 54
SURFACE WND DIR.N N N NW N N N N N N N N
SURFACE WND SPD.5 3 2 2 2 2 3 3 3 3 5 5
SURFACE WND GST.12 10 8 8 9 9 10 10 12 12 13 13
MIX HGT (KFT)...3.4 2.2 1.8 0.8 0.6 0.8 1.0 1.4 1.7 1.8 1.9 2.0
TRANSP WIND DIR.N N N NW NW NW NW NW NW NW N N
TRANSP WIND SPD.14 9 10 7 6 7 8 9 10 10 12 12
LVORI...........1 2 2 2 3 3 3 3 3 3 3 3
ADI.............57 4 5 3 3 3 4 4 5 5 8 8
VRATE KT-FT/1K..41 17 16 5 3 5 7 11 15 17 18 20
VENTRATE CAT....FR PR PR PR PR PR PR PR PR PR PR PR
SDSPL KT-FT/100041 17 16 5 3 5 7 11 15 17 18 20
CEILING (KFT)...24 24 25 25 25 25 25 25 25 21 17 14
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................3 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 33.
MIN HUMIDITY........33 PERCENT.
DEWPOINT............7.
SURFACE WINDS (MPH).NORTHWEST WINDS 5 TO 10 MPH. GUSTS UP TO 22 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......7300 FT AGL.
SMOKE DISPERSAL.....FAIR (22200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (109800 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (123500
KNOT-FT) IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (22200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (109800 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (123500
KNOT-FT) IN THE AFTERNOON.
CEILING (KFT).......12 DECREASING TO 5.7.
VISIBILITY..........9 DECREASING TO 4 LATE IN THE MORNING, THEN
INCREASING TO 9 IN THE LATE MORNING AND
AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 12 TO 21 MPH INCREASING TO 22 TO 24
MPH LATE IN THE AFTERNOON.
LVORI...............2.
ADI.................5 EARLY IN THE MORNING INCREASING TO 105 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........34 26 19 24 29 34 37 40 43 39 35 31
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............23 22 22 24 27 29 31 32 32 33 32 31
DEWPOINT........9 8 8 8 8 8 8 7 7 7 6 6
RH..............54 54 54 50 44 40 37 34 34 33 33 34
SURFACE WND DIR.N NW NW NW NW NW NW NW NW NW NW NW
SURFACE WND SPD.5 5 6 6 7 8 9 9 10 9 9 8
SURFACE WND GST.13 14 15 16 17 18 20 21 22 22 21 20
MIX HGT (KFT)...2.2 2.5 3.0 3.9 4.9 5.8 6.4 6.8 7.0 7.3 7.3 6.8
TRANSP WIND DIR.N NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.12 12 13 14 16 18 20 21 22 23 24 24
LVORI...........3 1 1 1 1 1 1 1 1 1 1 1
ADI.............5 36 47 64 91 105 66 71 76 81 85 105
VRATE KT-FT/1K..22 26 33 48 70 92 110 124 133 146 152 144
VENTRATE CAT....PR PR PR FR GD GD VGD VGD VGD VGD EXL VGD
SDSPL KT-FT/100022 26 33 48 70 92 110 124 133 146 152 144
CEILING (KFT)...13 13 13 12 11 9.6 9.7 9.9 10 8.6 7.1 5.7
VISIBILITY (SM).9 9 9 4 9 9 9 9 9 9 9 9
FORECASTER...FT
REQUESTED BY...CHRIS COLONAIR
TYPE OF REQUEST...HAZMAT
.TAG 2608076.0/BOX
.DELDT 03/26/26
.FORMATTERVERSION 2.0.0
.EMAIL CCOLONAIR@SANDISFIELDMA.GOV
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