Spot Forecast
Issued by NWS Portland, ME

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FNUS71 KGYX 151911
FWSGYX

Spot Forecast for Vassalboro Field...Maine Forest Service
National Weather Service Gray ME
311 PM EDT Mon Apr 15 2024

Forecast is based on ignition time of 1800 EDT on April 15.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (207) 688-3224, if you have questions
or concerns with this forecast.

Winds will slowly diminish this evening but could still gust 10
to 15 mph through 7 or 8 PM, and any shower activity is currently
expected to remain south of the burn location. Mixing heights will
diminish this evening with smoke dispersion becoming poor. RH is
forecast to be around 60 percent around the time of ignition but
will also steadily increase this evening. For Tuesday, winds will
be similar, but conditions are expected to be drier with lower RH
in the afternoon and early evening hours.


.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 38.
Max humidity........89 percent.
Dewpoint............37.
Min apparent temp...37.
Wind (20 ft)........Northwest winds around 5 mph early in the
                    evening becoming light.
Mixing height.......400 ft AGL.
Transport winds.....West 7 to 13 mph.
Smoke dispersal.....Poor (2300 knot-ft).
LVORI...............4.
ADI.................12 decreasing to 4 early in the evening.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........38  38  38  38  38  38  21  21  21  21  21  21
Weather cov.....10
Weather type....
Tstm cov........NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............56  53  51  49  47  45  44  42  41  40  40  39
Dewpoint........39  39  39  38  37  36  36  36  35  35  35  35
RH..............53  59  63  66  68  70  73  79  79  82  82  85
Aparnt tmp (F)..56  53  51  48  46  45  44  42  41  40  38  37
20 FT wind dir..NW  NW  NW  W   W   W   W   W   W   W   W   W
20 FT wind spd..8   7   4   3   3   2   2   2   2   2   3   3
20 FT wind gust.13  10  8   7   7   6   6   6   5   6   7   7
Mix hgt (kft)...0.9 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.W   NW  W   W   W   W   W   W   W   W   W   W
Transp wind spd.13  10  8   7   8   7   7   7   7   8   8   8
LVORI...........2   3   3   3   3   3   3   3   5   5   5   5
ADI.............16  7   4   4   4   3   3   3   4   4   4   4
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
Vrate kt-ft/1K..10  4   3   3   3   2   2   2   2   3   3   3
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.TUESDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 60.
Min humidity........37 percent.
Dewpoint............35.
Min apparent temp...36.
Wind (20 ft)........Light winds becoming northwest 5 to 7 mph early
                    in the morning.
Mixing height.......5900 ft AGL.
Transport winds.....West 7 to 14 mph increasing to northwest 20 to
                    22 mph in the late morning and afternoon.
Smoke dispersal.....Poor (2300 knot-ft) early in the morning
                    increasing to excellent (96200 knot-ft) in the
                    afternoon increasing to excellent (102900
                    knot-ft) late in the afternoon.
LVORI...............3.
ADI.................9 increasing to 29 early in the morning, then
                    increasing to 70 late in the morning increasing
                    to 105 late in the morning decreasing to 90
                    increasing to 95 early in the afternoon
                    decreasing to 1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........18  18  18  18  18  18  39  39  39  39  39  39
Weather cov.....
Weather type....
Tstm cov........NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............39  42  45  48  51  54  55  57  58  59  59  57
Dewpoint........36  36  37  36  36  35  35  35  34  34  33  33
RH..............89  79  73  63  56  48  47  43  40  39  37  40
Aparnt tmp (F)..36  39  42  45  51  54  55  57  58  59  59  57
20 FT wind dir..W   W   W   W   NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..5   5   6   7   8   9   9   9   9   9   9   9
20 FT wind gust.9   10  13  14  16  17  17  18  18  18  18  18
Mix hgt (kft)...0.4 0.4 1.6 3.2 4.3 4.7 5.3 5.7 5.8 5.7 5.9 5.4
Transp wind dir.W   W   W   W   W   NW  NW  NW  NW  NW  NW  NW
Transp wind spd.8   7   14  20  20  20  21  20  21  21  22  22
LVORI...........4   4   3   1   1   1   1   1   1   2   2   2
ADI.............8   10  29  70  105 85  93  94  95  1   1   1
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
Vrate kt-ft/1K..3   2   19  55  72  81  96  96  104 103 111 103
Ventrate Cat....PR  PR  PR  FR  GD  GD  GD  GD  VGD VGD VGD VGD

.TUESDAY NIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    clear (0-5 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 33.
Max humidity........78 percent.
Dewpoint............31 decreasing to 28 after 3 am.
Min apparent temp...31.
Wind (20 ft)........Northwest winds 5 to 7 mph in the evening
                    becoming light.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 9 to 17 mph.
Smoke dispersal.....Good (42500 knot-ft) early in the evening
                    decreasing to poor (4100 knot-ft) late in the
                    night.
LVORI...............2 early in the evening.
ADI.................1 early in the evening.
Haines Index........3 to 4 or very low potential for large plume
                    dominated fire growth to or low potential for
                    large plume dominated fire growth.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........31  31  31  31  31  31  1   1   1   1   1   1
Weather cov.....
Weather type....
Tstm cov........NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO  NO
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............55  52  48  46  44  42  41  39  38  37  35  34
Dewpoint........33  33  33  32  32  31  30  30  29  29  28  28
RH..............43  48  56  58  62  65  65  70  70  72  75  78
Aparnt tmp (F)..55  52  44  42  41  38  38  36  34  34  32  31
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..9   8   8   7   6   6   5   5   5   3   3   3
20 FT wind gust.17  16  15  14  13  10  10  9   9   8   8   7
Mix hgt (kft)...2.8 0.7 0.8 0.9 0.6 0.7 0.7 0.6 0.6 0.6 0.5 0.5
Transp wind dir.NW  NW  N   N   NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.17  15  14  13  13  10  12  12  10  9   9   9
LVORI...........2   2   M   M   M   M   M   M   M   M   M   M
ADI.............1   1   M   M   M   M   M   M   M   M   M   M
Haines index....4   4   3   3   3   3   3   3   3   3   3   3
Vrate kt-ft/1K..43  9   10  9   7   6   7   6   5   5   4   4
Ventrate Cat....FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...COMBS
Requested by...Timothy Kjellman
Type of request...PRESCRIBED
.TAG 2410973.0/GYX
.DELDT 04/15/24
.FormatterVersion 2.0.0
.EMAIL Timothy.Kjellman@maine.gov
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