Suppression Forecast
Issued by NWS Boston, MA

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FNUS71 KBOX 191213
FWSBOX

Spot Forecast for Nantucket Land Bank Head of Plains...Nantucket Land Bank
National Weather Service Taunton MA
813 AM EDT Wed Apr 19 2017

Forecast is based on ignition time of 0900 EDT on April 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Dry conditions are expected today with considerable clouds. There
may be a brief period of mostly sunny skies around midday before
filling back in again this afternoon. Relative humidity will
likely be in 60 to 65 percent range from late morning through mid
afternoon, then rise to 70 percent by evening. Expect east winds
around 13 to 15 mph at ignition time will become southeast by
midday and may gust to around 20 mph during the afternoon.

Expect mainly dry conditions into early this evening, then
showers are likely by around midnight. Spotty showers will linger
across the island through Thursday, though rainfall amounts only
be around a tenth of an inch. Expect south winds at 12 to 15 mph
early Thursday, but will shift to southwest and diminish during
the day.

.REST OF TODAY...

Smoke dispersal.....Good (32200 knot-ft).
Max temperature.....Around 46.
CWR.................0 percent.
Wind (20 ft)........Southeast winds 12 to 14 mph.
Min humidity........60 percent.
Sky/weather.........Partly sunny (55-65 percent).
Surface winds.......Southeast winds 12 to 14 mph.
Mixing height.......2200-2500 ft AGL.
Transport winds.....Southeast 16 to 17 mph.

TIME (EDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  52  43  45  46  48  58  67  77
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
Temp............44  45  45  45  45  45  45  45  45
RH..............62  60  60  62  62  62  65  65  68
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  S
20 FT wind spd..12  13  14  14  14  13  13  13  13
20 FT wind gust.15  15  20  20  20  20  20  20  20
Surface wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  S
Surface wnd spd.12  13  14  14  14  13  13  13  13
Surface wnd gst.15  15  20  20  20  20  20  20  20
Mix hgt (kft)...2.2 2.3 2.5 2.5 2.5 2.5 2.4 2.4 2.3
Transp wind dir.E   SE  SE  SE  SE  SE  SE  SE  S
Transp wind spd.17  17  17  17  17  17  17  16  16
VRate kt-ft/100033  35  38  37  37  37  36  33  32

.TONIGHT...

Smoke dispersal.....Poor to good (5300-31700 knot-ft).
Min temperature.....Around 42.
CWR.................6 percent...increasing to 39 percent.
Wind (20 ft)........South winds 12 to 14 mph.
Max humidity........96 percent.
Sky/weather.........Cloudy (85-95 percent). Showers likely...mainly
                    after midnight.
Surface winds.......South winds 12 to 14 mph.
Mixing height.......300-2100 ft AGL.
Transport winds.....South 17 to 23 mph.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........81  84  88  90  91  93  93  94  94  91  92  93
Weather cov.....    SCH SCH CHC CHC CHC CHC CHC LKY LKY CHC CHC
Weather type....    RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
CWR.............0   0   10  10  10  10  10  10  40  40  40  40
Temp............44  44  43  44  44  44  44  44  44  44  45  45
RH..............70  73  76  76  79  82  86  89  93  96  93  96
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..12  12  13  13  12  12  13  13  14  13  13  12
20 FT wind gust.20  20  20  20  20  20  20  15  15  15  15  15
Surface wnd dir.S   S   S   S   S   S   S   S   S   S   S   S
Surface wnd spd.12  12  13  13  12  12  13  13  14  13  13  12
Surface wnd gst.20  20  20  20  20  20  20  15  15  15  15  15
Mix hgt (kft)...2.1 1.9 1.7 1.6 1.4 1.2 1.0 0.8 0.6 0.5 0.4 0.3
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.17  17  18  20  21  22  22  23  23  22  21  20
VRate kt-ft/100032  29  28  27  25  23  19  16  11  9   7   5

.THURSDAY...

Smoke dispersal.....Poor (3000 knot-ft).
Max temperature.....Around 53.
CWR.................39 percent...decreasing to 6 percent.
Wind (20 ft)........South winds 8 to 13 mph.
Min humidity........83 percent.
Sky/weather.........Cloudy (90-100 percent). A chance of showers.
                    Areas of fog through early afternoon.
Surface winds.......South winds 8 to 13 mph.
Mixing height.......200-500 ft AGL.
Transport winds.....Southeast 12 to 18 mph.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........95     97     95     92     90     90
Weather cov.....CHANCE CHANCE CHANCE CHANCE CHANCE CHANCE
Weather type....RNSHWR RN/FG  RN/FG  RN/FG  RNSHWR RN/FG
Tstm cov........
CWR.............40     20     20     20     10     10
Temp............45     47     50     52     52     51
RH..............96     93     89     86     83     89
20 ft wind......S 12   S 13   S 12   S 10   S 9    S 8
20 ft wind gust.15     15     15     15     10     10
Surface wind....S 12   S 13   S 12   S 10   S 9    S 8
Surface wnd gst.15     15     15     15     10     10
Mix hgt (ft)....300    200    400    500    500    500
Transport wind..S 18   SW 16  S 15   S 13   S 12   SE 13
VRate kt-ft/10005      3      5      5      5      5

$$
Forecaster...EVT
Requested by...T. Parker Schuerman
Type of request...PRESCRIBED
.TAG 1707189.0/BOX
.EMAIL tschuerman@nantucketlandbank.org



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