400
FNUS71 KBOX 220850
FWSBOX

Spot Forecast for Richardson WMA Rx Fire...MassWildlife
National Weather Service Boston/Norton MA
450 AM EDT Tue Jul 22 2025

Forecast is based on ignition time of 0500 EDT on July 22.
If conditions become unrepresentative, contact the National
Weather Service.

.DISCUSSION...

Mostly sunny with no precipitation expected today. Very light
winds, mainly with a northerly component this morning becoming
northwest by the afternoon at 5-10 mph. Poor dispersal this
morning improving to good with better mixing in the afternoon.

Dry and mainly clear tonight with SW winds 5-10 mph. Radiational
cooling will result in an inversion above the surface thus poor
dispersal overnight.

.REST OF TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Min temperature.....Around 53.
Max humidity........83 percent.
Dewpoint............47.
Max apparent temp...53.
Surface winds (mph).Light winds.
Wind (20 ft)........Light winds.
Mixing height.......500 ft AGL.
Transport winds.....North around 6 mph.
Smoke dispersal.....Poor (2500 knot-ft).
LVORI...............5.
ADI.................3.
CEILING (KFT).......25.

TIME (EDT)      5AM
Sky (%).........7
Weather cov.....
Weather type....
Tstm cov........
CWR.............0
Temp............53
Dewpoint........47
RH..............80
Heat index (F)..53
20 FT wind dir..N
20 FT wind spd..2
20 FT wind gust.7
Surface wnd dir.N
Surface wnd spd.2
Surface wnd gst.7
Mix hgt (kft)...0.5
Transp wind dir.N
Transp wind spd.6
LVORI...........5
ADI.............3
Vrate kt-ft/1K..3
Ventrate Cat....PR
Ceiling (kft)...25

.TODAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Max temperature.....Around 78.
Min humidity........40 percent.
Dewpoint............50.
Max apparent temp...76.
Surface winds (mph).Light winds becoming northwest around 5 mph
                    early in the afternoon, then becoming light
                    late in the afternoon.
Wind (20 ft)........Light winds becoming northwest around 5 mph
                    early in the afternoon, then becoming light
                    late in the afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....North 5 to 7 mph shifting to the northwest 6 to
                    8 mph in the afternoon.
Smoke dispersal.....Poor (2100 knot-ft) early in the morning
                    increasing to good (41200 knot-ft) in the
                    afternoon.
LVORI...............3.
ADI.................4 early in the morning increasing to 58 in the
                    afternoon.
CEILING (KFT).......25 decreasing to 21 late in the afternoon.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........1      2      10     8      22     16
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............53     61     69     73     76     76
Dewpoint........48     52     50     50     51     51
RH..............83     72     51     44     42     42
Heat index (F)..53     61     69     73     76     76
20 ft wind......N 2    N 3    N 3    NW 5   NW 5   NW 3
20 ft wind gust.7      8      8      9      9      9
Surface wind....N 2    N 3    N 3    NW 5   NW 5   NW 3
Surface wnd gst.7      8      8      9      9      9
Mix hgt (ft)....500    1200   4600   5900   6500   6400
Transport wind..N 6    NE 5   N 6    NW 8   NW 7   NW 7
LVORI...........5      3      1      1      1      1
ADI.............6      7      33     58     54     53
Vrate kt-ft/1K..3      5      23     41     39     38
Ventrate Cat....POOR   POOR   POOR   FAIR   POOR   POOR
Ceiling (kft)...25     25     25     25     21     21

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Min temperature.....Around 55.
Max humidity........96 percent.
Dewpoint............54.
Max apparent temp...75.
Surface winds (mph).Light winds.
Wind (20 ft)........Light winds.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 3 to 5 mph shifting to the southwest
                    3 to 7 mph after midnight, then shifting to the
                    west around 5 mph early in the morning.
Smoke dispersal.....Fair (21700 knot-ft) early in the evening
                    decreasing to poor (1400 knot-ft) late in the
                    night.
LVORI...............5.
ADI.................2 to 31.
CEILING (KFT).......21 increasing to 25.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........14     13     7      10     10     15
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............75     69     63     59     58     57
Dewpoint........53     54     53     54     54     55
RH..............46     59     70     83     87     93
Heat index (F)..75     69     63     59     58     57
20 ft wind......W 2    SW 1   SW 1   SW 2   S 2    SW 2
20 ft wind gust.7      6      6      6      6      5
Surface wind....W 2    SW 1   SW 1   SW 2   S 2    SW 2
Surface wnd gst.7      6      6      6      6      5
Mix hgt (ft)....5400   600    500    500    500    500
Transport wind..NW 5   NW 3   S 5    S 5    S 7    SW 5
LVORI...........2      3      3      5      6      7
ADI.............31     2      2      2      3      2
Vrate kt-ft/1K..22     2      2      2      3      2
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR
Ceiling (kft)...21     25     25     25     25     25

$$
Forecaster...Mensch
Requested by...Alex Entrup
Type of request...PRESCRIBED
.TAG 2518371.0/BOX
.DELDT 07/22/25
.FormatterVersion 2.0.0
.EMAIL ben.mazzei@mass.gov,alex.entrup@mass.gov