Suppression Forecast
Issued by NWS Boston, MA

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000
FNUS71 KBOX 241255
FWSBOX

Spot Forecast for TEST...NWS
National Weather Service Boston/Norton MA
855 AM EDT Tue Apr 24 2018

Forecast is based on ignition time of 0000 EDT on April 25.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Today and Wednesday...

Very dry conditions this afternoon with minimum relative humidity
values dropping to between 15 and 25 percent away from the south
coast, Cape and Islands. South to southwest winds increasing to
between 10 and 15 mph this afternoon with gusts to around 20 mph.
A brief period of gusts to around 25 mph is possible this
afternoon.

Low pressure approaching from the southwest will bring widespread
rain very late tonight and Wednesday. Rainfall amounts on the
order of 0.75 to 1.50 inches are anticipated.

OUTLOOK...Thursday through Sunday...

Mainly dry and seasonable weather is anticipated Thursday into
this weekend other than a few brief showers.

.WEDNESDAY...

Sky/weather.........Cloudy (95-100 percent). Rain through the day.
                    Isolated thunderstorms late in the afternoon.
                    Patchy fog.
CWR.................100 percent.
Max temperature.....Around 55.
Min humidity........86 percent.
Dewpoint............46 increasing to 51 early.
Max apparent temp...54.
Surface winds.......Southeast winds 7 to 13 mph.
Wind (20 ft)........Southeast winds 7 to 13 mph. Gusty and erratic
                    winds expected near thunderstorms late in the
                    afternoon.
Mixing height.......600-900 ft AGL.
Transport winds.....Southeast 12 to 18 mph.
Smoke dispersal.....Poor to fair (6500-15200 knot-ft).
LVORI...............5.
ADI.................16 increasing to 20 early.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
CEILING (KFT).......0.8 increasing to 1.0, then decreasing to 0.8
                    in the afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........97  95  99  100 100 100 100 100 100 100 100 100
Weather cov.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF
Weather type....RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........                                ISO ISO ISO ISO
CWR.............100 100 100 100 100 100 100 100 100 100 100 100
Temp............48  49  50  51  52  53  54  54  54  54  54  54
Dewpoint........45  45  46  47  48  50  50  50  51  51  52  52
RH..............89  86  86  86  86  89  86  86  90  90  93  93
Heat index (F)..45  46  47  51  52  53  54  54  54  54  54  54
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..7   8   8   9   12  13  13  13  13  12  12  10
20 FT wind gust.10  10  12  14  16  17  17  17  17  16  16  15
Surface wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Surface wnd spd.7   8   8   9   12  13  13  13  13  12  12  10
Surface wnd gst.10  10  12  14  16  17  17  17  17  16  16  15
Mix hgt (kft)...0.6 0.7 0.8 0.8 0.9 0.9 0.9 0.9 0.9 0.8 0.7 0.7
Transp wind dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  S
Transp wind spd.12  12  13  15  16  18  18  18  18  17  16  15
LVORI...........5   4   4   4   4   4   4   4   4   4   5   5
ADI.............13  13  14  17  19  23  22  22  21  19  18  16
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
VRate kt-ft/10007   7   8   11  12  15  15  14  14  12  10  9
Ceiling (kft)...0.8 0.8 0.8 0.8 1.0 1.0 1.0 0.8 0.8 0.8 0.8 0.8

.WEDNESDAY NIGHT...

Sky/weather.........Cloudy (85-95 percent). Areas of fog through
                    the night. Rain showers and isolated
                    thunderstorms in the evening. Rain showers
                    likely after midnight.
CWR.................100 percent decreasing to 17 percent.
Min temperature.....Around 47.
Max humidity........100 percent.
Dewpoint............49 decreasing to 46 early in the morning.
Max apparent temp...54.
Surface winds.......South winds 5 to 10 mph in the evening becoming
                    light, then becoming southwest around 5 mph
                    early in the morning.
Wind (20 ft)........South winds 5 to 10 mph in the evening becoming
                    light, then becoming southwest around 5 mph
                    early in the morning. Gusty and erratic winds
                    expected near thunderstorms in the evening.
Mixing height.......500-800 ft AGL.
Transport winds.....Southwest 7 to 14 mph.
Smoke dispersal.....Poor (3200 knot-ft).
LVORI...............7.
ADI.................11 decreasing to 5 around midnight.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
CEILING (KFT).......0.8 decreasing to 0.3 late in the evening, then
                    increasing to 0.8 around midnight increasing to
                    1.0 early in the morning increasing to 2.0
                    increasing to 2.5 early in the morning.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........98     92     94     95     94     89
Weather cov.....DEFNTE DEFNTE LIKELY LIKELY CHANCE CHANCE
Weather type....RAIN   RNSHWR RNSHWR RNSHWR RN/FG  RNSHWR
Tstm cov........ISOLTD ISOLTD
CWR.............100    40     40     40     20     20
Temp............54     52     50     49     49     48
Dewpoint........51     49     49     49     49     47
RH..............90     89     96     100    100    96
Heat index (F)..54     52     47     47     48     46
20 ft wind......SE 10  E 10   SE 7   S 5    S 3    SW 5
20 ft wind gust.15     17     13     9      8      9
Surface wind....SE 10  E 10   SE 7   S 5    S 3    SW 5
Surface wnd gst.15     17     13     9      8      9
Mix hgt (ft)....600    500    500    500    600    700
Transport wind..S 14   SE 13  S 9    S 8    S 7    SW 8
LVORI...........5      5      7      9      9      7
ADI.............15     11     6      5      3      5
Haines index....3      3      3      3      3      3
VRate kt-ft/10008      6      4      4      3      5
Ceiling (kft)...0.8    0.8    0.8    0.8    0.8    2.0

.THURSDAY...

Sky/weather.........Partly sunny (60-70 percent). Chance of rain
                    showers early in the morning. Slight chance of
                    rain showers until late afternoon. Patchy fog
                    early in the morning.
CWR.................17 percent decreasing to 0 percent through
                    early afternoon.
Max temperature.....Around 66.
Min humidity........48 percent.
Dewpoint............45.
Max apparent temp...64.
Surface winds.......West winds 5 to 9 mph. Gusts up to 23 mph in
                    the afternoon.
Wind (20 ft)........West winds 5 to 9 mph. Gusts up to 23 mph in
                    the afternoon.
Mixing height.......1000-2600 ft AGL increasing to 3300-4200 ft AGL
                    early.
Transport winds.....West 9 to 18 mph increasing to 20 to 23 mph
                    late in the afternoon.
Smoke dispersal.....Poor to good (8000-57500 knot-ft) increasing to
                    excellent (62400 knot-ft) in the afternoon.
LVORI...............4.
ADI.................11 increasing to 85.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
CEILING (KFT).......7.0 increasing to 15.

TIME (EDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........83        75        67        55
Weather cov.....CHANCE    S CHC     S CHC     S CHC
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........
CWR.............20        0         0         0
Temp............48        54        62        64
Dewpoint........46        45        45        46
RH..............93        71        54        52
Heat index (F)..46        54        62        64
20 FT wind......W 5G10    W 7G13    W 8G20    W 9G22
Surface wind....W 5G10    W 7G13    W 8G20    W 9G22
Mix hgt (ft)....1000      2000      3600      4200
Transport wind..SW 9      W 13      W 18      W 21
LVORI...........6         3         1         1
ADI.............6         24        48        58
Haines index....3         3         3         3
VRate kt-ft/10008         22        58        75
Ceiling (kft)...7.0       15        15        15

$$
Forecaster...KJC
Requested by...Steph
Type of request...PRESCRIBED
.TAG 1807590.0/BOX
.DELDT 04/24/18
.EMAIL stephanie.dunten@noaa.gov



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