Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
952
FNUS71 KBOX 211120
FWSBOX
Spot Forecast for Frances Crane WMA North Rx Burn...MassWildlife
National Weather Service Boston/Norton MA
720 AM EDT Tue May 21 2024
Forecast is based on ignition time of 0800 EDT on May 21.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
High pressure builds off the Mid Atlantic coast today, while low
pressure slides into northern New England. This will yield light
west to southwest winds this morning for the upper Cape, then becoming
southwest this afternoon and increasing to 10-15 mph, with gusts
up to 20 mph possible at times.
Minimum relative humidities of 60 to 70 percent are expected this
afternoon across the upper Cape today. On Wednesday, minimum
relative humidities range from 55 to 65 percent, along with
southwest winds 15 to 20 mph.
.OUTLOOK...Thursday through Monday...
A cold front brings scattered showers and thunderstorms on
Thursday. A few could be strong to severe. Drier, but still mild
on Friday. Unsettled weather returns for the weekend into early
next week. Though no washouts are anticipated over the weekend.
.REST OF TODAY...
Sky/weather.........Mostly cloudy then becoming mostly sunny. Areas
of dense fog early, then areas of fog late in
the morning.
CWR.................0 percent.
Max temperature.....Around 66.
Min humidity........70 percent.
Dewpoint............53.
Max apparent temp...64.
Surface winds (mph).Southwest winds 5 to 13 mph.
Wind (20 ft)........Southwest winds 5 to 13 mph.
Mixing height.......1300 ft AGL.
Transport winds.....Southwest 9 to 18 mph.
Smoke dispersal.....Poor (7300 knot-ft) early in the morning
increasing to fair (18100 knot-ft) in the
afternoon.
LVORI...............6.
ADI.................9 to 15 increasing to 19 to 26 early.
Haines Index........4 or low potential for large plume dominated
fire growth.
CEILING (KFT).......0.3 increasing to 0.8, then increasing to 3.5
early in the afternoon increasing to 6.0 early
in the afternoon increasing to 9.0 decreasing
to 7.0 late in the afternoon decreasing to 5.0
decreasing to 2.5 late in the afternoon.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........99 90 81 71 61 50 40 42 44 47
Weather cov.....ARS ARS
Weather type....FOG FOG
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............53 56 59 62 63 63 64 63 62 61
Dewpoint........53 53 53 54 54 54 54 54 54 54
RH..............100 90 80 75 72 72 70 72 75 78
Heat index (F)..53 56 59 62 63 63 64 63 62 61
20 FT wind dir..SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..5 6 7 9 10 10 13 13 13 13
20 FT wind gust.8 10 13 15 16 17 18 20 20 20
Surface wnd dir.SW SW SW SW SW SW SW SW SW SW
Surface wnd spd.5 6 7 9 10 10 13 13 13 13
Surface wnd gst.8 10 13 15 16 17 18 20 20 20
Mix hgt (kft)...0.9 1.0 1.1 1.2 1.2 1.2 1.3 1.2 1.1 1.1
Transp wind dir.SW SW SW SW SW SW SW SW SW SW
Transp wind spd.9 10 12 13 14 15 16 16 17 18
LVORI...........8 5 4 3 3 3 3 3 3 3
ADI.............9 13 15 19 22 24 26 25 25 25
Haines index....4 4 4 4 4 4 4 4 4 4
Vrate kt-ft/1K..7 9 11 13 15 16 18 17 17 18
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...0.3 0.3 0.8 0.8 3.5 6.0 9.0 7.0 5.0 2.5
.TONIGHT...
Sky/weather.........Mostly cloudy. Patchy fog early. Areas of fog
around midnight, then areas of dense fog early
in the morning.
CWR.................0 percent.
Min temperature.....Around 53.
Max humidity........93 percent.
Dewpoint............52.
Max apparent temp...60.
Surface winds (mph).Southwest winds 10 to 13 mph.
Wind (20 ft)........Southwest winds 10 to 13 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 16 to 17 mph.
Smoke dispersal.....Fair (16900 knot-ft) early in the evening
decreasing to poor (6100 knot-ft) late in the
night.
LVORI...............4.
ADI.................23 to 24 decreasing to 14 to 15 until just
after midnight.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
CEILING (KFT).......2.0 decreasing to 0.3.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........53 60 66 64 63 61 61 61 61 61 62 62
Weather cov..... PTY PTY ARS ARS ARS ARS ARS ARS ARS ARS
Weather type.... FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............60 58 56 55 55 54 54 54 54 54 54 54
Dewpoint........53 53 52 52 52 52 52 52 52 52 52 52
RH..............78 83 86 90 90 93 93 93 93 93 93 93
Heat index (F)..60 58 56 55 55 54 54 54 54 54 54 54
20 FT wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..13 12 10 10 10 10 10 10 10 10 10 10
20 FT wind gust.18 16 16 15 15 16 15 16 16 16 16 16
Surface wnd dir.SW SW SW SW SW SW SW SW SW SW SW SW
Surface wnd spd.13 12 10 10 10 10 10 10 10 10 10 10
Surface wnd gst.18 16 16 15 15 16 15 16 16 16 16 16
Mix hgt (kft)...1.1 1.1 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.5 0.5 0.5
Transp wind dir.SW SW SW SW SW SW SW SW SW SW SW SW
Transp wind spd.17 17 17 17 16 16 16 16 16 16 16 17
LVORI...........3 4 4 5 5 5 5 5 5 5 5 5
ADI.............24 23 14 15 14 14 14 14 14 14 14 15
Haines index....4 4 4 4 5 5 5 4 4 4 4 4
Vrate kt-ft/1K..17 16 8 8 7 6 6 6 6 6 6 7
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...2.0 1.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
.WEDNESDAY...
Sky/weather.........Mostly sunny. Areas of fog early in the
morning.
CWR.................0 percent.
Max temperature.....Around 68.
Min humidity........68 percent.
Dewpoint............54.
Max apparent temp...66.
Surface winds (mph).Southwest winds 10 to 13 mph.
Wind (20 ft)........Southwest winds 10 to 13 mph.
Mixing height.......1100 ft AGL.
Transport winds.....Southwest 17 to 23 mph.
Smoke dispersal.....Poor (8000 knot-ft) early in the morning
increasing to fair (21400 knot-ft) in the
afternoon.
LVORI...............4.
ADI.................13 to 20 increasing to 24 to 30 in the late
morning and afternoon.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
CEILING (KFT).......0.8 increasing to 25.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........58 51 37 28 24 17
Weather cov.....AREAS
Weather type....FOG NONE NONE NONE NONE NONE
Tstm cov........
CWR.............0 0 0 0 0 0
Temp............55 58 63 66 66 65
Dewpoint........53 54 55 55 56 55
RH..............93 86 75 68 70 70
Heat index (F)..55 58 63 66 66 65
20 ft wind......SW 10 SW 12 SW 12 SW 12 SW 13 SW 13
20 ft wind gust.16 17 18 20 21 22
Surface wind....SW 10 SW 12 SW 12 SW 12 SW 13 SW 13
Surface wnd gst.16 17 18 20 21 22
Mix hgt (ft)....500 700 1000 1000 1100 1000
Transport wind..SW 17 SW 18 SW 21 SW 22 SW 23 SW 23
LVORI...........5 4 3 3 3 3
ADI.............13 20 25 28 30 27
Haines index....4 4 5 5 5 5
Vrate kt-ft/1K..8 12 18 20 21 20
Ventrate Cat....POOR POOR POOR POOR POOR POOR
Ceiling (kft)...0.8 0.8 10 15 20 25
$$
Forecaster...Nocera
Requested by...Alex Entrup
Type of request...PRESCRIBED
.TAG 2414806.0/BOX
.DELDT 05/21/24
.FormatterVersion 2.0.0
.EMAIL alex.entrup@mass.gov