Spot Forecast
Issued by NWS Portland, ME
Issued by NWS Portland, ME
226
FNUS71 KGYX 171210
FWSGYX
Spot Forecast for Rattlesnake...NH-NECC
National Weather Service Gray ME
810 AM EDT Mon Aug 17 2026
Forecast is based on forecast start time of 0800 EDT on August 17.
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.
Today will start muggy and humid at the burn site, with
temperatures in the upper 60s. Intermittent showers and
thunderstorms are expected today, with RH remaining fairly humid
through the day. RH will bottom out at near 70% this afternoon.
Over the span of the day, wetting rains are likely. Winds will be
light and variable through the day, and skies will remain overcast
through the day as well. Patchy fog is likely to build in this
evening while any remaining showers or storms taper off. High
temperatures today will get into the mid-70s, low temperatures
tonight look to be in the lower 60s. Fog continues through the
night, with otherwise no rainfall expected through the overnight
period. Fog will mix out at sunrise tomorrow morning.
.REST OF TODAY...
Sky/weather.........Mostly cloudy (75-85 percent). Showers likely
early in the morning, then chance of showers
and slight chance of thunderstorms in the
afternoon.
CWR.................11 percent.
Chance of thunder...16 percent.
Max temperature.....Around 74.
Min humidity........71 percent.
Dewpoint............64.
Max apparent temp...74.
Wind (20 ft)........Light winds. Gusty and erratic winds possible
near thunderstorms late in the afternoon.
Mixing height.......2000 ft AGL.
Transport winds.....South 6 to 10 mph.
Smoke dispersal.....Poor (7100 knot-ft) early in the morning increasing
to fair (13900 knot-ft) in the afternoon.
LVORI...............4.
ADI.................15 increasing to 16 late in the afternoon.
CEILING (KFT).......0.6 increasing to 1.0.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........81 80 79 89 91 91 91 85 78 68
Weather cov.....LKY CHC CHC CHC SCH SCH SCH CHC CHC CHC
Weather type....RW RW RW RW RW RW RW RW RW RW
Tstm cov........NO NO NO NO NO NO NO SCH SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10
Chc of thdr (%).0 0 0 10 10 10 10 10 10 20
Temp............68 69 69 70 71 72 73 73 74 72
Dewpoint........63 63 63 63 63 64 64 64 64 65
RH..............90 90 84 78 76 76 73 73 71 79
Aparnt tmp (F)..63 65 68 70 71 72 73 73 74 72
20 FT wind dir..E E SE SE SE SE SE SE SE E
20 FT wind spd..3 3 2 2 2 2 2 2 1 1
20 FT wind gust.7 6 6 5 5 5 5 5 2 2
Mix hgt (kft)...1.0 1.2 1.3 1.4 1.5 1.8 1.9 1.9 2.0 1.7
Transp wind dir.S S S S S S S S S S
Transp wind spd.8 9 10 9 8 8 8 7 8 6
LVORI...........5 5 4 4 4 3 3 3 3 4
ADI.............10 14 17 16 16 18 19 16 20 12
Vrate kt-ft/1K..7 10 12 11 11 12 13 12 14 8
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.9 1.0
.TONIGHT...
Sky/weather.........Mostly cloudy (75-85 percent) then becoming
partly cloudy (45-55 percent) then becoming
mostly cloudy (55-65 percent). Chance of
showers and slight chance of thunderstorms in
the evening. Slight chance of showers
overnight. Patchy fog in the late evening and
overnight.
CWR.................11 percent.
Chance of thunder...16 percent.
Min temperature.....Around 60.
Max humidity........100 percent.
Dewpoint............64 decreasing to 61 after 3 am.
Max apparent temp...71.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms in the evening.
Mixing height.......400 ft AGL.
Transport winds.....Southeast 3 to 6 mph shifting to the north
overnight.
Smoke dispersal.....Poor (1300 knot-ft).
LVORI...............7.
ADI.................5.
CEILING (KFT).......0.6 decreasing to 0.1.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........79 81 83 88 79 77 69 49 51 69 57 58
Weather cov.....CHC CHC CHC CHC CHC CHC PTY PTY PTY SCH SCH SCH
Weather type....RW RW RW RW RW RW FOG FOG FOG RNF RNF RNF
Tstm cov........SCH SCH SCH SCH SCH SCH NO NO NO NO NO NO
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
Chc of thdr (%).20 20 20 20 20 10 10 10 10 10 10 0
Temp............71 70 68 66 65 64 64 63 63 62 61 61
Dewpoint........65 65 66 65 64 64 64 63 63 62 61 61
RH..............81 84 93 97 97 100 100 100 100 100 100 100
Aparnt tmp (F)..71 70 68 66 65 64 64 63 63 62 61 61
20 FT wind dir..E N N N N N N N N N NW NW
20 FT wind spd..1 0 0 0 0 0 0 0 0 0 1 1
20 FT wind gust.2 2 2
Mix hgt (kft)...1.1 0.8 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.5 0.5 0.5
Transp wind dir.SE SE E E NE NE N N N N N N
Transp wind spd.6 5 3 3 3 3 3 5 5 6 6 5
LVORI...........4 5 7 8 8 10 10 10 10 9 9 10
ADI.............8 4 2 2 2 2 2 2 2 3 3 2
Vrate kt-ft/1K..6 3 1 2 2 1 1 2 2 2 2 2
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...0.6 0.6 0.6 0.5 0.4 0.3 0.2 0.2 0.2 0.2 0.2 0.1
.TUESDAY...
Sky/weather.........Partly sunny (45-55 percent). Patchy fog early
in the morning. Slight chance of showers late
in the morning. Chance of showers and slight
chance of thunderstorms in the afternoon.
CWR.................6 percent.
Chance of thunder...17 percent.
Max temperature.....Around 78.
Min humidity........56 percent.
Dewpoint............62.
Max apparent temp...77.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Northwest 5 to 10 mph.
Smoke dispersal.....Poor (1800 knot-ft) early in the morning
increasing to good (41700 knot-ft) in the
afternoon.
LVORI...............8 early in the morning.
ADI.................5 early in the morning.
CEILING (KFT).......0.2 increasing to 6.6.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........57 46 45 45 53 54 52 57 59 52 45 53
Weather cov.....PTY PTY PTY SCH SCH SCH CHC CHC CHC CHC CHC CHC
Weather type....FOG FOG FOG RW RW RW RW RW RW RW RW RW
Tstm cov........NO NO NO NO NO NO SCH SCH SCH SCH SCH SCH
CWR.............10 10 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 10 10 10 10 10 10 20 20 20 10
Temp............60 62 64 67 70 73 74 76 76 76 76 77
Dewpoint........60 61 62 63 64 64 63 63 62 61 60 60
RH..............100 97 93 87 81 73 69 64 62 60 58 56
Aparnt tmp (F)..60 62 64 67 70 73 74 76 76 76 76 77
20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT wind spd..1 1 1 1 1 1 1 1 1 1 2 2
20 FT wind gust.2 2 2 2 2 2 2 2 2 2 5 5
Mix hgt (kft)...0.5 0.5 0.8 1.1 1.5 2.0 2.8 3.6 4.4 5.0 4.6 3.8
Transp wind dir.NW N N N NW N NW NW NW NW NW NW
Transp wind spd.5 6 6 6 6 7 7 8 8 9 10 9
LVORI...........9 7 M M M M M M M M M M
ADI.............4 6 M M M M M M M M M M
Vrate kt-ft/1K..2 3 4 5 7 12 17 25 31 40 42 30
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR FR PR
Ceiling (kft)...0.2 0.3 0.4 0.9 1.3 1.8 2.9 4.1 5.2 5.7 6.1 6.6
$$
Forecaster...PALMER
Requested by...GARETH WEAVER
Type of request...WILDFIRE
.TAG 2619829.0/GYX
.DELDT 08/17/26
.FormatterVersion 2.0.0
.EMAIL nhnecc@firenet.gov