Spot Forecast
Issued by NWS Portland, ME
Issued by NWS Portland, ME
299
FNUS71 KGYX 161315
FWSGYX
Spot Forecast for Kennebec Highlands Vienna Mountain...Maine Forest Service
National Weather Service Gray ME
915 AM EDT Wed Sep 16 2026
Forecast is based on ignition time of 0900 EDT on September 16.
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.
High pressure resides south of the forecast area today, and will
aid in bringing warmer air into the region for the afternoon.
Southerly winds remain today with thickening and lowering clouds
and RH values not as low as Tuesday. Skies remain overcast tonight
with great RH recovery and overnight lows again in the low 50s.
Thursday, a slowing cold front drapes across southern New
Hampshire and will allow a disturbance from the Great Lakes to
track south of burn location. The chance for showers increase
Thursday afternoon, with the best chance for rain overnight,
pushing east by early Friday morning. There is some uncertainty
how far north a wetting rainfall advances, with the greatest
confidence south of the burn location. Rain over the location may
tend to be more showery than a period of soaking rain.
Friday, skies trend sunny as drier air arrives on gusty northwest
winds up to 35 mph. This will result in RH values falling into the
lower 40s into the afternoon. RH values recover towards 80 percent
overnight.
.REST OF TODAY...
Sky/weather.........Mostly cloudy (65-75 percent) then becoming
mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 75.
Min humidity........55 percent.
Dewpoint............55 increasing to 58 late in the afternoon.
Max apparent temp...74.
Wind (20 ft)........Southwest winds around 5 mph late in the
morning becoming light.
Mixing height.......2800 ft AGL.
Transport winds.....Southwest 8 to 10 mph.
Smoke dispersal.....Poor (8700 knot-ft) early in the morning
increasing to fair (22600 knot-ft) in the
afternoon.
LVORI...............3.
ADI.................17 increasing to 29 late in the afternoon, then
decreasing to 16 late in the afternoon.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........79 73 62 50 39 42 40 43 53
Weather cov.....
Weather type....
Tstm cov........NO NO NO NO NO NO NO NO NO
CWR.............0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0
Temp............57 60 63 67 70 73 73 74 73
Dewpoint........53 53 53 54 55 56 57 58 58
RH..............86 78 70 63 59 55 57 57 59
Aparnt tmp (F)..57 60 63 67 70 73 73 74 73
20 FT wind dir..SW SW SW SW SW SW SW SW SW
20 FT wind spd..6 5 5 5 5 5 5 5 5
20 FT wind gust.12 9 9 9 9 9 9 9 9
Mix hgt (kft)...1.0 1.2 1.4 1.9 2.5 2.8 2.7 2.6 2.1
Transp wind dir.SW SW SW SW SW SW W W SW
Transp wind spd.10 9 8 8 8 9 8 8 8
LVORI...........4 4 3 2 2 1 2 2 2
ADI.............13 13 13 20 25 32 27 26 16
Vrate kt-ft/1K..9 10 10 14 17 23 19 18 15
Ventrate Cat....PR PR PR PR PR PR PR PR PR
.TONIGHT...
Sky/weather.........Mostly cloudy (50-60 percent) then becoming
mostly cloudy (60-70 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 53.
Max humidity........100 percent.
Dewpoint............57 decreasing to 54 early in the morning.
Max apparent temp...71.
Wind (20 ft)........Light winds.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 6 to 7 mph shifting to the north late
in the evening.
Smoke dispersal.....Poor (2000 knot-ft).
LVORI...............6.
ADI.................5.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........53 49 56 56 43 66 64 49 55 68 62 74
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
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............71 68 63 61 60 59 59 58 57 56 55 55
Dewpoint........59 59 57 57 57 56 56 56 55 55 55 54
RH..............66 73 81 87 90 90 90 93 93 96 100 96
Aparnt tmp (F)..71 68 63 61 60 59 59 58 57 56 55 55
20 FT wind dir..SW SW SW W NW N N N N N N N
20 FT wind spd..3 3 3 3 3 3 3 3 5 5 5 5
20 FT wind gust.7 7 7 7 7 7 7 7 9 9 9 9
Mix hgt (kft)...0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.S S SW W NW N N N N N N N
Transp wind spd.7 6 6 6 6 6 6 6 6 7 7 7
LVORI...........3 3 5 6 6 6 6 6 6 7 9 7
ADI.............7 3 3 3 3 3 3 3 4 5 5 5
Vrate kt-ft/1K..6 2 2 2 2 2 2 2 2 2 3 3
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
.THURSDAY...
Sky/weather.........Mostly cloudy (70-80 percent).
CWR.................0 percent increasing to 28 percent early in the
morning.
Chance of thunder...8 percent.
Max temperature.....Around 70.
Min humidity........73 percent.
Dewpoint............56 increasing to 59 late in the afternoon.
Max apparent temp...68.
Wind (20 ft)........Light winds becoming northeast around 5 mph
early in the morning, then becoming light in
the late morning and afternoon.
Mixing height.......2900 ft AGL.
Transport winds.....Northeast 7 to 8 mph shifting to the south 6 to
9 mph in the afternoon.
Smoke dispersal.....Poor (2600 knot-ft) early in the morning
increasing to fair (17800 knot-ft) in the
afternoon.
LVORI...............6 in the morning and early afternoon.
ADI.................9 increasing to 18 late in the morning.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........72 77 58 70 82 81 91 76 74 88 89 74
Weather cov.....
Weather type....
Tstm cov........NO NO NO NO NO NO NO NO NO NO NO NO
CWR.............0 0 30 30 30 30 30 30 30 30 30 30
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 10
Temp............54 55 56 58 61 63 64 66 67 68 68 67
Dewpoint........54 54 55 57 57 57 58 58 58 59 60 60
RH..............100 96 96 96 87 81 81 75 73 73 76 78
Aparnt tmp (F)..54 55 56 58 61 63 64 66 67 68 68 67
20 FT wind dir..N NE NE NE E E SE S S S S S
20 FT wind spd..5 6 6 5 3 2 3 3 3 3 3 3
20 FT wind gust.9 12 12 9 7 5 7 7 7 7 7 7
Mix hgt (kft)...0.4 0.4 0.7 1.0 1.3 1.9 2.4 2.6 2.9 2.0 2.2 1.6
Transp wind dir.NE NE NE E E E SE S S S SW S
Transp wind spd.7 7 8 7 7 7 7 6 7 8 9 7
LVORI...........9 7 6 6 5 3 3 3 M M M M
ADI.............5 5 9 9 12 17 19 17 M M M M
Vrate kt-ft/1K..3 3 5 6 8 12 14 13 17 14 18 10
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
$$
Forecaster...CORNWELL
Requested by...Aliesha Black
Type of request...PRESCRIBED
.TAG 2621857.2/GYX
.DELDT 09/16/26
.FormatterVersion 2.0.0
.EMAIL aliesha.j.black@maine.gov