Suppression Forecast
Issued by NWS Boston, MA

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000
FNUS71 KBOX 180839
FWSBOX

SPOT FORECAST FOR CRANE TRAINING...DCR FIRE CONTROL
NATIONAL WEATHER SERVICE TAUNTON MA
439 AM EDT SAT APR 18 2015

FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON APRIL 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...PLEASE CONTACT THE
NATIONAL WEATHER SERVICE.

.DISCUSSION...

ACROSS THE OUTER-CAPE...VARIABLE ONSHORE FLOW WILL MAKE FOR
RELATIVE MOIST CONDITIONS AS MINIMUM RELATIVE HUMIDITY VALUES ARE
FORECAST TO REMAIN ABOVE 40 PERCENT PRIOR TO IGNITION.TRANSPORTATION
WINDS WILL BE LIGHT MAKING FOR POOR DISPERSION.

IT IS SHORTLY AFTER IGNITION THAT WINDS WILL INCREASE OUT OF THE
SW AHEAD OF AN APPROACHING COLD FRONT THROUGH THE AFTERNOON AND
TOWARDS THE EVENING PERIOD. SW-WINDS SUSTAINED AROUND 10 TO 15
MPH WITH GUSTS UP TO 25 MPH WILL BE POSSIBLE AS TEMPERATURES WARM
INTO THE 60S. BETTER MIXING AND DISPERSION MIGHT BE OBTAINED
ALBEIT LATE.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY. PATCHY FOG EARLY IN THE MORNING.
TEMPERATURE.........57 AT IGNITION...MAX 62.
RH..................64 PERCENT AT IGNITION...MIN 44 PERCENT.
WIND (20 FT)........WINDS VARIABLE AT IGNITION AROUND 5 MPH...
                    BECOMING SOUTHWEST 10 MPH IN THE AFTERNOON.
MIXING HEIGHT.......500 FT AGL AT IGNITION...OTHERWISE 200-900 FT
                    AGL.
TRANSPORT WINDS.....SOUTHWEST 3 TO 10 MPH.
SMOKE DISPERSAL.....POOR /2700 KNOT-FT/ AT IGNITION. MAX...POOR
                    /5500 KNOT-FT/.

TIME (EDT)          11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).............18  20  19  18  6   12  21
WEATHER COV.........
WEATHER TYPE........
TSTM COV............
TEMP................57  58  58  58  59  59  59
RH..................64  62  62  62  53  49  44
20 FT WIND DIR......SE  SE  S   S   S   SW  SW
20 FT WIND SPD......1   3   5   7   8   9   10
20 FT WIND GUST.....5   5       10  10  15  15
MIX HGT (KFT).......0.5 0.7 0.8 0.9 0.8 0.7 0.5
TRANSP WIND DIR.....W   SW  S   S   S   SW  SW
TRANSP WIND SPD.....6   6   7   7   8   9   10
LVORI...............3   3   3   3   2   2   2
ADI.................6   6   5   7   6   7   8
VRATE KT-FT/1000....3   3   5   5   6   5   5

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY...THEN BECOMING MOSTLY
                    CLOUDY...THEN BECOMING MOSTLY CLEAR.
TEMPERATURE.........MIN 43.
RH..................MAX 71 PERCENT.
WIND (20 FT)........NORTH WINDS 8 TO 12 MPH WITH GUSTS UP TO 30
                    MPH.
MIXING HEIGHT.......200-1400 FT AGL.
TRANSPORT WINDS.....NORTH 10 TO 18 MPH...INCREASING TO AROUND 20
                    MPH LATE.
SMOKE DISPERSAL.....POOR TO FAIR (1900-24300 KNOT-FT).

TIME (EDT)          6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).............45  57  79  56  34  12  10  8   6   9   11  13
WEATHER COV.........
WEATHER TYPE........
TSTM COV............
TEMP................56  53  50  48  47  47  47  47  47  46  45  44
RH..................51  57  66  71  71  71  71  68  68  68  70  70
20 FT WIND DIR......SW  W   W   W   NW  N   N   N   N   N   N   N
20 FT WIND SPD......9   9   8   8   9   9   10  10  12  12  12  12
20 FT WIND GUST.....15  15  10  15  15  20  20  20  20  25  25  30
MIX HGT (KFT).......0.4 0.3 0.2 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.3 1.4
TRANSP WIND DIR.....SW  W   W   W   W   NW  NW  N   N   N   N   N
TRANSP WIND SPD.....10  12  13  14  15  16  16  17  18  18  18  20
LVORI...............2   2   3   3   3   3   3   3   3   3   3   3
ADI.................8   10  11  12  10  11  11  12  12  12  12  13
VRATE KT-FT/1000....4   3   2   4   6   8   10  13  16  18  20  24

.SUNDAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 52.
RH..................MIN 44 PERCENT.
WIND (20 FT)........EAST WINDS 7 TO 12 MPH WITH GUSTS UP TO 25 MPH.
MIXING HEIGHT.......1600-2900 FT AGL.
TRANSPORT WINDS.....NORTHEAST 12 TO 20 MPH...BECOMING EAST AROUND 9
                    MPH LATE.
SMOKE DISPERSAL.....FAIR TO GOOD (14300-32800 KNOT-FT).

TIME (EDT)          6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).............24  34  45  48  51  53  48  42  36  34  32  30
WEATHER COV.........
WEATHER TYPE........
TSTM COV............
TEMP................44  44  45  47  49  50  51  50  50  50  49  48
RH..................70  68  65  58  52  48  44  46  44  44  48  49
20 FT WIND DIR......N   N   N   N   NE  NE  NE  NE  NE  NE  E   E
20 FT WIND SPD......12  12  12  12  10  10  9   9   8   8   7   7
20 FT WIND GUST.....25  25  25  20  20  15  15  15  10  10  10  10
MIX HGT (KFT).......1.6 1.7 1.9 2.0 2.2 2.4 2.5 2.7 2.9 2.5 2.1 1.8
TRANSP WIND DIR.....N   N   N   N   N   NE  NE  NE  NE  NE  E   E
TRANSP WIND SPD.....20  20  20  18  16  15  13  12  9   9   9   9
LVORI...............M   M   M   M   M   M   M   M   M   M   M   M
ADI.................M   M   M   M   M   M   M   M   M   M   M   M
VRATE KT-FT/1000....27  30  32  33  31  31  28  27  23  20  17  14

$$

FORECASTER...SIPPRELL
REQUESTED BY...JOSH NIGRO
TYPE OF REQUEST...PRESCRIBED
.TAG 20150418.CRANE.01/BOX



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