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  
 
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