631
FNUS71 KBOX 292204
FWSBOX

Spot Forecast for Spencer Fair...MEMA
National Weather Service Boston/Norton MA
604 PM EDT Fri Aug 29 2025

Forecast is based on forecast start time of 1800 EDT on August 29.
If conditions become unrepresentative, contact the National
Weather Service.

.DISCUSSION...
Showers and scattered thunderstorms are moving to the east at 6
pm. Other than an isolated shower this evening, expect gradual
clearing through the night with winds shifting to NW around 10 mph
after 8 pm. Temperatures will fall into the upper 50s later this
evening.

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming partly cloudy.
                    Chance of rain showers and isolated
                    thunderstorms early in the evening, then slight
                    chance of rain showers early in the evening.
Chance of pcpn......40 percent.
Chance of rain......51 percent.
Chance of thunder...37 percent.
Min temperature.....Around 47.
Max humidity........100 percent.
Max apparent temp...65.
Eye level winds.....Southwest winds up to 4 mph early in the
                    evening becoming light, then becoming northwest
                    around 3 mph late in the night.
Surface winds (mph).Southwest winds around 6 mph decreasing to
                    around 5 mph early in the evening, then
                    becoming light until just after midnight
                    becoming northwest around 5 mph late in the
                    night.
Wind (20 ft)........Southwest winds around 6 mph decreasing to
                    around 5 mph early in the evening, then
                    becoming light until just after midnight
                    becoming northwest around 5 mph late in the
                    night. Gusty and erratic winds expected near
                    thunderstorms early in the evening.
Rainfall amount.....0.05 inches.
CEILING (KFT).......7.9 decreasing to 6.7 early in the evening,
                    then increasing to 9.7 early decreasing to 6.6
                    late in the evening increasing to 11 increasing
                    to 16 increasing to 21 decreasing to 18 late in
                    the night.
Visibility..........9.
Mixing height.......500 ft AGL.
Transport winds.....West 5 to 8 mph shifting to the northwest 8 to
                    10 mph in the late evening and overnight.
Smoke dispersal.....Poor (2600 knot-ft).
LVORI...............7.
ADI.................3 to 14.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........64  61  47  40  37  33  23  26  29  30  30  19
Weather cov.....CHC SCH
Weather type....RW  RW
Tstm cov........ISO
Chc of pcpn (%).40  20  10  10  10  10  10  10  10  10  10  10
Chc of rain (%).50  40  50  30  20  10  10  0   0   0   0   0
Chc of thdr (%).40  40  10  10  10  0   0   0   0   0   0   0
Temp............65  63  60  58  57  56  54  53  52  50  49  48
RH..............84  93  93  100 100 93  96  96  96  100 100 100
Aparnt tmp (F)..65  63  60  58  57  56  54  53  52  49  47  46
20 FT wind dir..SW  SW  W   W   NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..6   5   3   2   2   3   3   3   3   3   5   5
20 FT wind gust.10  8   7   7   7   7   8   8   9   9   9   9
Eye lvl wnd dir.SW  SW  W   W   NW  NW  NW  NW  NW  NW  NW  NW
Eye lvl wnd spd.4   3   2   1   1   2   2   2   2   2   3   3
Eye lvl wnd gst.6   5   4   4   4   4   5   5   5   5   5   5
Surface wnd dir.SW  SW  W   W   NW  NW  NW  NW  NW  NW  NW  NW
Surface wnd spd.6   5   3   2   2   3   3   3   3   3   5   5
Surface wnd gst.10  8   7   7   7   7   8   8   9   9   9   9
Mix hgt (kft)...1.8 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.6 0.5
Transp wind dir.SW  W   W   NW  NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.8   5   8   9   10  10  10  10  9   9   9   8
LVORI...........4   6   6   9   9   6   8   8   8   9   9   9
ADI.............14  3   4   4   5   5   5   5   4   4   4   4
Vrate kt-ft/1K..12  3   4   5   5   5   5   5   4   4   4   4
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR
Ceiling (kft)...7.9 6.7 9.7 6.6 6.7 7.5 11  16  23  21  18  18
Visibility (sm).9   9   9   9   9   9   9   9   9   9   9   9

$$
Forecaster...KJC
Requested by...MEMA State Control
Type of request...OTHER
.TAG 2520954.0/BOX
.DELDT 08/29/25
.FormatterVersion 2.0.0
.EMAIL MEMA.StateControl@mass.gov