209
FNUS71 KBOX 252006
FWSBOX
SPOT FORECAST FOR BARNSTABLE COUNTY WILDFIRE TRAINING...MA DCR FOREST FIRE CONTROL
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
406 PM EDT TUE MAR 25 2025
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON MARCH 26.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
LOW PRESSURE EARLY WEDNESDAY WILL BRING A PERIOD OF MOSTLY CLOUDY
CONDITIONS AND A RISK FOR LIGHT RAIN SHOWERS (WITH LIMITED WETTING
RAINFALL POTENTIAL) DURING THE EARLY TO MID MORNING HOURS. WE
WILL SEE A PERIOD OF CLEARING DURING THE LATE MORNING TO EARLY
AFTERNOON, WITH DECREASING CLOUDINESS AT LEAST FOR A BRIEF PERIOD
OF TIME. TEMPERATURES SHOULD THEN START TO WARM INTO THE MID TO
UPPER 40S. THIS PERIOD OF HEATING COULD GENERATE ADDITIONAL POP-
UP SHOWERS OVER CAPE COD DURING THE AFTERNOON. WITH A COUPLE
PERIODS OF CLOUDINESS, RELATIVE HUMIDITIES MAY NOT REACH VERY LOW
LEVELS, WITH LOWEST RHS IN THE 60 PERCENT RANGE. WINDS WILL BECOME
W TO NW AROUND 5-10 MPH, WITH DEVELOPING GUSTS TO AROUND 15 MPH
ONCE EARLY-DAY CLOUDINESS DISSIPATES.
IF THE ABOVE FORECAST ISN'T FAVORABLE, THURSDAY MAY OFFER
COMPARATIVELY MORE FAVORABLE CONDITIONS FOR PRESCRIBED BURNING
ACTIVITIES. FULL SUNSHINE AND WEST BREEZES TO AROUND 10-15 MPH IS
EXPECTED ON THURSDAY, WITH RELATIVE HUMIDITIES AROUND 40 PERCENT
DURING THE AFTERNOON. MIXING DEPTH MAY BE RESTRICTED EARLY
THURSDAY MORNING, BUT WE EXPECT BETTER MIXING AND LOFT OF SMOKE BY
THURSDAY LATE MORNING TO AFTERNOON.
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY. CHANCE OF RAIN IN THE MORNING,
THEN CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
CWR.................6 PERCENT INCREASING TO 15 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 46.
MIN HUMIDITY........65 PERCENT.
DEWPOINT............34.
MIN APPARENT TEMP...37.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTH 5 TO 7 MPH IN THE
LATE MORNING AND EARLY AFTERNOON, THEN SHIFTING
TO THE NORTHWEST AROUND 6 MPH LATE IN THE
AFTERNOON SHIFTING TO THE WEST 5 TO 6 MPH LATE
IN THE AFTERNOON.
WIND (20 FT)........LIGHT WINDS BECOMING NORTH 5 TO 7 MPH IN THE
LATE MORNING AND EARLY AFTERNOON, THEN SHIFTING
TO THE NORTHWEST AROUND 6 MPH LATE IN THE
AFTERNOON SHIFTING TO THE WEST 5 TO 6 MPH LATE
IN THE AFTERNOON.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....NORTH 6 TO 9 MPH SHIFTING TO THE WEST 9 TO 12
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (22200 KNOT-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................4 TO 12 INCREASING TO 15 TO 23 EARLY.
CEILING (KFT).......6.0 DECREASING TO 5.0 EARLY, THEN INCREASING TO
13 EARLY IN THE AFTERNOON DECREASING TO 4.5 IN
THE AFTERNOON.
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........81 77 74 70 67 62 58 53 55 58 60
WEATHER COV.....CHC CHC CHC CHC SCH SCH SCH CHC
WEATHER TYPE....RN RN RN RN RN RW RW RW
TSTM COV........
CWR.............0 10 10 10 10 10 10 20 20 20 20
TEMP............39 40 40 42 43 44 44 44 44 44 43
DEWPOINT........35 35 35 35 35 35 34 34 34 33 33
RH..............85 82 82 76 73 70 68 68 68 65 67
HEAT INDEX (F)..37 38 37 38 39 40 40 40 41 41 40
20 FT WIND DIR..N N N N NE NW N N NW W SW
20 FT WIND SPD..3 3 5 6 6 7 7 7 6 6 5
20 FT WIND GUST.7 7 8 10 13 13 14 15 15 15 15
SURFACE WND DIR.N N N N NE NW N N NW W SW
SURFACE WND SPD.3 3 5 6 6 7 7 7 6 6 5
SURFACE WND GST.7 7 8 10 13 13 14 15 15 15 15
MIX HGT (KFT)...0.8 0.7 0.9 1.0 2.0 2.2 2.2 2.5 2.1 2.3 2.2
TRANSP WIND DIR.NE N N N N N NW W W W W
TRANSP WIND SPD.6 6 8 9 8 8 8 7 9 10 12
LVORI...........5 4 4 4 3 3 3 3 3 3 3
ADI.............5 4 10 12 15 21 16 15 18 22 23
VRATE KT-FT/1K..4 4 6 8 14 15 15 15 17 21 22
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...6.0 5.0 5.0 5.0 5.0 13 4.5 4.5 4.5 4.5 5.0
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF RAIN SHOWERS EARLY IN THE EVENING,
THEN SLIGHT CHANCE OF RAIN SHOWERS EARLY.
CWR.................15 PERCENT DECREASING TO 0 PERCENT UNTIL JUST
AFTER MIDNIGHT.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........79 PERCENT.
DEWPOINT............32 DECREASING TO 27 AFTER MIDNIGHT.
MIN APPARENT TEMP...28.
SURFACE WINDS (MPH).WEST WINDS 6 TO 7 MPH.
WIND (20 FT)........WEST WINDS 6 TO 7 MPH.
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 18 MPH.
SMOKE DISPERSAL.....FAIR (26600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (9700 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............4.
ADI.................8 TO 10.
CEILING (KFT).......4.5 INCREASING TO 20.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........58 57 55 51 46 42 39 37 34 32 29 27
WEATHER COV.....CHC CHC SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW
TSTM COV........
CWR.............20 20 0 0 0 0 0 0 0 0 0 0
TEMP............42 41 40 39 38 37 37 36 35 34 34 34
DEWPOINT........33 34 34 33 32 31 30 28 27 27 27 27
RH..............70 76 79 79 79 79 75 72 72 75 75 75
HEAT INDEX (F)..38 36 35 34 33 32 32 30 29 28 28 28
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..7 7 7 7 7 6 6 7 7 7 7 7
20 FT WIND GUST.14 13 12 12 13 14 15 15 16 16 17 17
SURFACE WND DIR.W W W W W W W W W W W W
SURFACE WND SPD.7 7 7 7 7 6 6 7 7 7 7 7
SURFACE WND GST.14 13 12 12 13 14 15 15 16 16 17 17
MIX HGT (KFT)...2.0 1.4 0.9 1.0 1.1 1.2 1.1 1.0 1.0 1.0 1.0 1.1
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.15 13 14 12 14 15 17 18 18 18 17 17
LVORI...........3 4 4 4 4 4 4 3 3 4 4 4
ADI.............10 8 9 8 9 10 8 8 8 8 8 8
VRATE KT-FT/1K..27 15 11 10 13 16 16 16 16 16 16 16
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
CEILING (KFT)...4.5 4.5 9.0 9.0 9.0 15 15 15 20 20 20 20
FORECASTER...LOCONTO
REQUESTED BY...JOSH D NIGRO
TYPE OF REQUEST...PRESCRIBED
.TAG 2507862.0/BOX
.DELDT 03/26/25
.FORMATTERVERSION 2.0.0
.EMAIL JOSH.NIGRO@MASS.GOV
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