352
FNUS71 KBOX 122215
FWSBOX

Spot Forecast for Frances Crane North 20260513...MassWildlife
National Weather Service Boston/Norton MA
615 PM EDT Tue May 12 2026

Forecast is based on ignition time of 0000 EDT on May 13.
If conditions become unrepresentative, contact the National
Weather Service.

.DISCUSSION...
Southerly wind gusts to 20 mph will diminish overnight, then
increase with gusts to 25 to 30 mph Wednesday afternoon. Dry
conditions tonight through Wednesday. Relative humidity will
increase to around 80 percent late tonight decreasing to 50 to 55
percent Wednesday afternoon.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Min temperature.....Around 48.
Max humidity........80 percent.
Dewpoint............43.
Max apparent temp...47.
Surface winds (mph).Southwest winds 6 to 7 mph.
Wind (20 ft)........Southwest winds 6 to 7 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 12 to 14 mph.
Smoke dispersal.....Poor (4900 knot-ft).
LVORI...............4.
ADI.................6 to 11.
CEILING (KFT).......23 decreasing to 21 early in the morning.

TIME (EDT)      MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........29  30  34  34  33  34
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0
Temp............49  49  49  49  49  49
Dewpoint........43  43  43  43  43  43
RH..............80  80  80  80  80  80
Heat index (F)..47  47  47  47  47  47
20 FT wind dir..SW  SW  SW  SW  SW  SW
20 FT wind spd..7   7   6   6   6   6
20 FT wind gust.17  16  14  14  14  13
Surface wnd dir.SW  SW  SW  SW  SW  SW
Surface wnd spd.7   7   6   6   6   6
Surface wnd gst.17  16  14  14  14  13
Mix hgt (kft)...0.5 0.5 0.5 0.4 0.5 0.6
Transp wind dir.W   W   W   W   SW  SW
Transp wind spd.14  14  14  13  13  12
LVORI...........4   4   4   4   4   4
ADI.............6   6   6   6   6   11
Vrate kt-ft/1K..6   6   6   5   6   6
Ventrate Cat....PR  PR  PR  PR  PR  PR
Ceiling (kft)...24  24  24  23  21  21

.WEDNESDAY...

Sky/weather.........Partly sunny.
CWR.................4 percent.
Max temperature.....Around 64.
Min humidity........54 percent.
Dewpoint............44.
Max apparent temp...62.
Surface winds (mph).Southwest winds 6 to 15 mph shifting to the
                    south 15 to 16 mph late in the afternoon.
Wind (20 ft)........South winds 6 to 16 mph.
Mixing height.......2300 ft AGL.
Transport winds.....Southwest 12 to 21 mph shifting to the south 22
                    to 25 mph in the afternoon.
Smoke dispersal.....Poor (5400 knot-ft) early in the morning
                    increasing to good (50400 knot-ft) in the
                    afternoon.
LVORI...............3.
ADI.................1 early in the morning increasing to 53 in the
                    afternoon.
CEILING (KFT).......21 decreasing to 13 early in the morning, then
                    decreasing to 10 early decreasing to 8.5 in the
                    late morning and early afternoon increasing to
                    9.8.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........48     54     72     77     54     52
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............50     53     58     61     62     62
Dewpoint........43     44     45     46     45     46
RH..............77     71     62     58     54     56
Heat index (F)..48     53     58     61     62     62
20 ft wind......SW 6   SW 7   SW 10  S 14   S 15   S 15
20 ft wind gust.13     14     18     23     25     26
Surface wind....SW 6   SW 7   SW 10  S 14   S 15   S 15
Surface wnd gst.13     14     18     23     25     26
Mix hgt (ft)....500    1300   1500   1800   2300   1900
Transport wind..SW 12  SW 18  SW 20  S 22   S 25   S 25
LVORI...........4      3      1      3      1      1
ADI.............11     32     33     1      52     47
Vrate kt-ft/1K..5      21     26     34     50     41
Ventrate Cat....POOR   POOR   POOR   POOR   FAIR   FAIR
Ceiling (kft)...21     10     8.7    8.8    9.4    10

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy.
CWR.................1 percent.
Min temperature.....Around 53.
Max humidity........86 percent.
Dewpoint............48.
Max apparent temp...62.
Surface winds (mph).South winds 9 to 14 mph.
Wind (20 ft)........South winds 9 to 14 mph.
Mixing height.......800 ft AGL.
Transport winds.....South 15 to 22 mph.
Smoke dispersal.....Good (30700 knot-ft) early in the evening
                    decreasing to poor (11200 knot-ft) late in the
                    night.
LVORI...............4.
ADI.................1 to 25.
CEILING (KFT).......11 increasing to 12, then decreasing to 9.7
                    decreasing to 7.5 after midnight decreasing to
                    6.4 decreasing to 5.4 early in the morning
                    decreasing to 4.3.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........70     75     64     74     66     61
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............62     58     55     55     56     55
Dewpoint........47     48     49     50     50     50
RH..............58     69     80     83     80     83
Heat index (F)..62     58     55     55     56     55
20 ft wind......S 14   S 10   S 10   S 10   S 9    SE 9
20 ft wind gust.24     22     22     21     20     20
Surface wind....S 14   S 10   S 10   S 10   S 9    SE 9
Surface wnd gst.24     22     22     21     20     20
Mix hgt (ft)....1600   800    1200   1200   900    900
Transport wind..S 22   S 17   S 16   S 17   S 16   S 15
LVORI...........3      3      4      4      4      4
ADI.............1      15     14     15     14     13
Vrate kt-ft/1K..31     12     17     19     13     12
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR
Ceiling (kft)...11     12     13     12     7.5    5.4

$$
Forecaster...KJC
Requested by...Alex Entrup
Type of request...PRESCRIBED
.TAG 2613496.0/BOX
.DELDT 05/12/26
.FormatterVersion 2.0.0
.EMAIL alex.entrup@mass.gov