Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
288
FNUS71 KBOX 210059
FWSBOX
Spot Forecast for Frances Crane WMA North Rx Burn...MassWildlife
National Weather Service Boston/Norton MA
859 PM EDT Mon May 20 2024
Forecast is based on ignition time of 0000 EDT on May 20.
If conditions become unrepresentative, contact the National
Weather Service.
.DISCUSSION...
Areas of fog, locally dense along with patchy drizzle, developing
overnight. Light NE winds with RH values increasing to near 100
percent. Stratus and fog burns off between 9 and 11 am Tuesday
followed by increasing sunshine. High confidence in SW winds
increasing to 15 to 20 mph with a few higher gusts. RH values
dropping to 65 to 70 percent in the afternoon.
.REST OF TONIGHT...
Sky/weather.........Mostly cloudy. Patchy fog. Areas of fog early,
then areas of fog in the late evening and
overnight. Patchy drizzle after midnight.
CWR.................13 percent.
Min temperature.....Around 49.
Max humidity........100 percent.
Dewpoint............51.
Max apparent temp...63.
Surface winds (mph).Southwest winds 5 to 10 mph.
Wind (20 ft)........Southwest winds 5 to 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 5 to 16 mph.
Smoke dispersal.....Fair (18400 knot-ft) early in the evening
decreasing to poor (2500 knot-ft) late in the
night.
LVORI...............7.
ADI.................2 to 27.
Haines Index........3 to 5 or very low to moderate potential for
large plume dominated fire growth.
CEILING (KFT).......0.2.
TIME (EDT) MIDNGT 2 AM 4 AM 6 AM 8 AM 10 AM NOON 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........93 97 97 100 93 79 68 54 43 36 44 60 72 78 87
Weather cov.....PATCHY PATCHY PATCHY PATCHY AREAS AREAS AREAS AREAS AREAS AREAS
Weather type....FOG DRZL DRZL DRZL FOG FOG NONE NONE NONE NONE NONE FOG FOG FOG FOG
Tstm cov........
CWR.............0 10 10 10 0 0 0 0 0 0 0 0 0 0 0
Temp............50 51 49 50 52 55 58 62 62 59 54 51 50 49 49
Dewpoint........48 48 48 49 51 52 53 54 53 51 51 50 49 49 49
RH..............93 89 96 96 96 90 83 75 72 75 90 96 96 100 100
Heat index (F)..47 51 46 47 52 55 58 62 62 59 54 51 50 49 49
20 ft wind......NE 8 NE 8 NE 8 NE 8 NE 9 NE 9 NE 9 NE 9 NE 9 NE 7 E 7 SE 5 S 2 W 1 SW 1
20 ft wind gust.14 12 12 16 15 17 16 15 14 12 8 7 6 6 7
Surface wind....NE 8 NE 8 NE 8 NE 8 NE 9 NE 9 NE 9 NE 9 NE 9 NE 7 E 7 SE 5 S 2 W 1 SW 1
Surface wnd gst.14 12 12 16 15 17 16 15 14 12 8 7 6 6 7
Mix hgt (ft)....800 900 500 600 600 1200 1500 1700 1500 1200 700 600 600 700 600
Transport wind..NE 15 NE 14 N 12 N 15 NE 15 NE 14 NE 14 N 13 NE 12 NE 9 E 7 SE 6 SE 6 S 5 SW 6
LVORI...........5 5 6 5 6 4 4 3 3 4 6 8 8 10 9
ADI.............13 12 10 16 11 21 27 27 23 15 5 4 3 2 3
Haines index....3 3 3 3 4 3 3 3 3 3 4 4 4 4 5
Vrate kt-ft/1K..11 11 5 8 8 14 18 18 15 10 4 3 3 3 3
Ventrate Cat....POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR POOR
Ceiling (kft)...0.3 0.3 0.3 0.3 0.3 0.8 1.0 1.5 1.5 21 2.2 0.3 0.2 0.2 0.2
.TUESDAY...
Sky/weather.........Mostly cloudy then becoming mostly sunny. Areas
of fog early in the morning.
CWR.................0 percent.
Max temperature.....Around 65.
Min humidity........67 percent.
Dewpoint............52.
Max apparent temp...64.
Surface winds (mph).Light winds becoming southwest around 15 mph.
Wind (20 ft)........Southwest winds 5 to 15 mph.
Mixing height.......800 ft AGL.
Transport winds.....Southwest 7 to 15 mph.
Smoke dispersal.....Poor (3200 knot-ft).
LVORI...............6.
ADI.................6 to 11.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
CEILING (KFT).......0.2 increasing to 0.3 late in the morning, then
increasing to 0.4 early increasing to 1.1 early
in the afternoon increasing to 8.6 increasing
to 22 late in the afternoon decreasing to 1.9.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........83 83 74 48 22 37
Weather cov.....AREAS AREAS
Weather type....FOG FOG NONE NONE NONE NONE
Tstm cov........
CWR.............0 0 0 0 0 0
Temp............50 53 60 63 64 62
Dewpoint........50 52 53 53 54 54
RH..............100 96 78 70 70 75
Heat index (F)..50 53 60 63 64 62
20 ft wind......SW 2 SW 5 SW 8 SW 12 SW 15 SW 15
20 ft wind gust.7 9 15 18 21 22
Surface wind....SW 2 SW 5 SW 8 SW 12 SW 15 SW 15
Surface wnd gst.7 9 15 18 21 22
Mix hgt (ft)....500 600 600 700 800 600
Transport wind..SW 7 SW 8 SW 9 SW 12 SW 15 SW 15
LVORI...........8 7 4 3 3 4
ADI.............7 6 10 9 11 11
Haines index....5 5 5 5 5 4
Vrate kt-ft/1K..3 4 5 7 10 8
Ventrate Cat....POOR POOR POOR POOR POOR POOR
Ceiling (kft)...0.2 0.2 0.3 1.1 23 24
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy fog after midnight.
CWR.................0 percent.
Min temperature.....Around 54.
Max humidity........93 percent.
Dewpoint............52.
Max apparent temp...59.
Surface winds (mph).Southwest winds 12 to 15 mph.
Wind (20 ft)........Southwest winds 12 to 15 mph.
Mixing height.......300 ft AGL.
Transport winds.....Southwest 14 to 18 mph.
Smoke dispersal.....Poor (4200 knot-ft).
LVORI...............5.
ADI.................12 to 18.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
CEILING (KFT).......2.7 increasing to 3.6 early in the evening,
then decreasing to 3.3 late in the evening
decreasing to 2.1 decreasing to 1.0 decreasing
to 0.9 decreasing to 0.8 decreasing to 0.7
after midnight increasing to 0.8.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........50 60 59 59 59 55
Weather cov..... PATCHY PATCHY PATCHY
Weather type....NONE NONE NONE FOG FOG FOG
Tstm cov........
CWR.............0 0 0 0 0 0
Temp............59 55 54 54 54 54
Dewpoint........53 52 52 52 52 52
RH..............80 90 93 93 93 93
Heat index (F)..59 55 54 54 54 54
20 ft wind......SW 15 SW 13 SW 12 SW 12 SW 13 SW 13
20 ft wind gust.21 17 17 17 18 18
Surface wind....SW 15 SW 13 SW 12 SW 12 SW 13 SW 13
Surface wnd gst.21 17 17 17 18 18
Mix hgt (ft)....500 500 500 400 400 400
Transport wind..SW 16 SW 17 SW 18 SW 18 SW 18 SW 15
LVORI...........4 5 5 5 5 5
ADI.............12 15 16 16 16 13
Haines index....4 5 5 5 5 5
Vrate kt-ft/1K..8 7 7 7 7 5
Ventrate Cat....POOR POOR POOR POOR POOR POOR
Ceiling (kft)...2.7 4.4 2.1 0.9 0.7 0.8
.WEDNESDAY...
Sky/weather.........Mostly sunny. Patchy fog early in the morning.
CWR.................0 percent.
Max temperature.....Around 68.
Min humidity........65 percent.
Dewpoint............54.
Max apparent temp...67.
Surface winds (mph).Southwest winds 12 to 14 mph.
Wind (20 ft)........Southwest winds 12 to 14 mph.
Mixing height.......1100 ft AGL.
Transport winds.....Southwest 16 to 22 mph.
Smoke dispersal.....Poor (5300 knot-ft) early in the morning
increasing to fair (20400 knot-ft) in the
afternoon.
LVORI...............4.
ADI.................15 to 20 increasing to 20 to 29 early, then
decreasing to 16 late in the 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 9 AM NOON 3 PM
Sky (%).........52 44 25 18
Weather cov.....PATCHY
Weather type....FOG NONE NONE NONE
Tstm cov........
CWR.............0 0 0 0
Temp............55 61 67 66
Dewpoint........53 54 55 55
RH..............93 78 66 66
Heat index (F)..55 61 67 66
20 FT wind......SW 13G18 SW 13G18 SW 13G21 SW 14G22
Surface wind....SW 13G18 SW 13G18 SW 13G21 SW 14G22
Mix hgt (ft)....400 600 1100 1000
Transport wind..SW 16 SW 20 SW 21 SW 22
LVORI...........5 4 3 3
ADI.............18 15 27 25
Haines index....5 4 4 4
Vrate kt-ft/1K..5 11 19 19
Ventrate Cat....POOR POOR POOR POOR
Ceiling (kft)...0.8 6.0 15 25
$$
Forecaster...KJC
Requested by...Alex Entrup
Type of request...PRESCRIBED
.TAG 2414676.0/BOX
.DELDT 05/20/24
.FormatterVersion 2.0.0
.EMAIL alex.entrup@mass.gov