059  
FNUS71 KBOX 102123  
FWSBOX  
 
SPOT FORECAST FOR BROCKTON HS NIGHT SCHOOL GRADUATION...MEMA  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
523 PM EDT THU JUL 10 2025  
 
FORECAST IS BASED ON FORECAST START TIME OF 1800 EDT ON JULY 10.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL  
WEATHER SERVICE.  
   
DISCUSSION  
 
THE SOAKING RAINY CONDITIONS FROM EARLIER IN THE DAY HAVE  
NOW DIMINISHED. THERE MAY BE SOME PASSING DRIZZLE OR VERY LIGHT  
RAIN SHOWERS AT WORST THROUGH 700 PM, BUT THE VAST MAJORITY OF THE  
TIME WILL END UP BEING DRY. OVERCAST CONDITIONS ARE EXPECTED WITH  
LIGHT NORTHEAST WINDS, WITH DEVELOPMENT OF AREAS OF FOG OR MIST  
GIVEN THE DAMP CONDITIONS FROM TODAY'S SOAKING RAINS. TEMPERATURES  
TONIGHT WILL RUN A COUPLE DEGREES COOLER THAN NORMAL THAN A  
TYPICAL MID-JULY EVENING IN BROCKTON, WITH TEMPERATURES LATE THIS  
EVENING IN THE MID TO UPPER 60S, FALLING TO LOWS IN THE MID 60S.  
   
TONIGHT  
 
SKY/WEATHER.........CLOUDY. AREAS OF FOG.  
CHANCE OF RAIN......20 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
BEGIN/END OF PCPN...  
MIN TEMPERATURE.....AROUND 63.  
MAX HUMIDITY........100 PERCENT.  
MAX APPARENT TEMP...68.  
MAX APPARENT TEMP...68.  
EYE LEVEL WINDS.....NORTH WINDS UP TO 5 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
SURFACE WINDS (MPH).NORTH WINDS 5 TO 6 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
WIND (20 FT)........NORTH WINDS 5 TO 6 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
100 FT WIND.........  
RAINFALL AMOUNT.....0.01 INCHES.  
PCPN AMOUNT.........0.01 INCHES.  
CEILING (KFT).......0.8 DECREASING TO 0.3.  
VISIBILITY..........3 DECREASING TO 0.50.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 3 TO 8 MPH.  
SMOKE DISPERSAL.....POOR (1500 KNOT-FT).  
LVORI...............8.  
ADI.................2 TO 13.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........93 92 95 93 94 93 91 94 93 92 91 86  
WEATHER COV.....ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS  
WEATHER TYPE....FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG  
TSTM COV........  
CHC OF RAIN (%).20 20 10 10 10 10 10 10 10 10 10 10  
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............68 67 67 66 65 64 64 64 64 64 64 64  
RH..............97 100 97 100 100 100 100 100 100 100 100 100  
HEAT INDEX (F)..68 67 67 66 65 64 64 64 64 64 64 64  
APARNT TMP (F)..68 67 67 66 65 64 64 64 64 64 64 64  
20 FT WIND DIR..N N N NE NE E NE NE N N N N  
20 FT WIND SPD..8 6 3 3 2 2 2 1 1 2 2 3  
20 FT WIND GUST. 7 7 7 7 6 5 5 5 5 5 5  
EYE LVL WND DIR.N N N NE NE E NE NE N N N N  
EYE LVL WND SPD.5 4 2 2 1 1 1 1 1 1 1 2  
EYE LVL WND GST. 4 4 4 4 3 3 3 3 3 3  
SURFACE WND DIR.N N N NE NE E NE NE N N N N  
SURFACE WND SPD.8 6 3 3 2 2 2 1 1 2 2 3  
SURFACE WND GST. 7 7 7 7 6 5 5 5 5 5 5  
MIX HGT (KFT)...1.2 1.2 1.1 0.8 0.9 1.0 0.5 0.5 0.4 0.4 0.5 0.6  
TRANSP WIND DIR.E E E E NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.8 8 8 7 6 5 5 3 5 5 6 6  
100 FT WIND.....  
LVORI...........5 7 8 9 9 10 10 10 10 10 9 9  
ADI.............13 12 4 3 3 2 2 2 2 2 3 6  
VRATE KT-FT/1K..9 8 8 5 5 4 2 2 2 2 2 3  
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR  
CEILING (KFT)...0.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3  
VISIBILITY (SM).3 3 3 3 2.0 2.0 1.0 .50 .50 .50 .50 .50  
   
FRIDAY  
 
SKY/WEATHER.........PARTLY SUNNY. AREAS OF FOG EARLY IN THE  
MORNING, THEN PATCHY FOG EARLY.  
CHANCE OF RAIN......15 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
BEGIN/END OF PCPN...  
MAX TEMPERATURE.....AROUND 83.  
MIN HUMIDITY........69 PERCENT.  
MAX APPARENT TEMP...87.  
MAX APPARENT TEMP...87.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING EAST UP TO 4 MPH IN THE  
AFTERNOON.  
SURFACE WINDS (MPH).LIGHT WINDS BECOMING EAST 5 TO 6 MPH IN THE  
AFTERNOON.  
WIND (20 FT)........LIGHT WINDS BECOMING EAST 5 TO 6 MPH IN THE  
AFTERNOON.  
100 FT WIND.........  
RAINFALL AMOUNT.....0.00 INCHES.  
PCPN AMOUNT.........0.00 INCHES.  
CEILING (KFT).......0.3 INCREASING TO 0.8 LATE IN THE MORNING, THEN  
INCREASING TO 1.5 INCREASING TO 3.0 EARLY IN  
THE AFTERNOON INCREASING TO 4.0 INCREASING TO  
4.5 LATE IN THE AFTERNOON DECREASING TO 4.0.  
VISIBILITY..........1.00 INCREASING TO 9.  
MIXING HEIGHT.......2400 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 5 TO 7 MPH.  
SMOKE DISPERSAL.....POOR (2400 KNOT-FT).  
LVORI...............6.  
ADI.................5 TO 17.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........85 86 80 76 73 69 68 67 66 61 56 51  
WEATHER COV.....ARS ARS PTY PTY  
WEATHER TYPE....FOG FOG FOG FOG  
TSTM COV........  
CHC OF RAIN (%).0 0 0 0 10 0 0 0 20 20 20 20  
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............64 65 67 69 72 75 77 79 81 82 82 82  
RH..............100 100 97 93 87 84 79 74 72 69 69 72  
HEAT INDEX (F)..64 65 67 69 72 75 77 79 85 86 86 87  
APARNT TMP (F)..64 65 67 69 72 75 77 79 85 86 86 87  
20 FT WIND DIR..N N N NE NE NE NE E E E E E  
20 FT WIND SPD..3 2 2 2 3 3 3 5 5 5 6 6  
20 FT WIND GUST.5 6 6 5 7 8 8 8 8 9 12 12  
EYE LVL WND DIR.N N N NE NE NE NE E E E E E  
EYE LVL WND SPD.2 1 1 1 2 2 2 3 3 3 4 4  
EYE LVL WND GST.3 4 4 3 4 5 5 5 5 5 7 7  
SURFACE WND DIR.N N N NE NE NE NE E E E E E  
SURFACE WND SPD.3 2 2 2 3 3 3 5 5 5 6 6  
SURFACE WND GST.5 6 6 5 7 8 8 8 8 9 12 12  
MIX HGT (KFT)...0.6 0.8 1.0 1.2 1.4 1.8 2.1 2.4 2.3 2.2 2.2 2.1  
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE NE E E  
TRANSP WIND SPD.5 6 7 7 7 6 5 5 6 6 6 7  
100 FT WIND.....  
LVORI...........9 9 6 5 4 4 4 3 3 3 3 3  
ADI.............5 6 9 11 13 13 12 13 16 15 15 17  
VRATE KT-FT/1K..2 4 6 7 9 9 8 10 12 11 11 12  
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR  
CEILING (KFT)...0.3 0.3 0.3 0.8 1.5 1.5 3.0 4.0 5.0 4.5 4.5 4.0  
VISIBILITY (SM).1.0 1.0 2.0 3 9 9 9 9 9 9 9 9  
   
FRIDAY NIGHT  
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.  
PATCHY FOG EARLY IN THE MORNING.  
CHANCE OF RAIN......15 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
BEGIN/END OF PCPN...  
MIN TEMPERATURE.....AROUND 65.  
MAX HUMIDITY........100 PERCENT.  
MAX APPARENT TEMP...83.  
MAX APPARENT TEMP...83.  
EYE LEVEL WINDS.....SOUTHEAST WINDS UP TO 4 MPH BECOMING LIGHT.  
SURFACE WINDS (MPH).SOUTH WINDS 5 TO 6 MPH IN THE EVENING BECOMING  
LIGHT.  
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH IN THE EVENING BECOMING  
LIGHT.  
100 FT WIND.........  
RAINFALL AMOUNT.....0.00 INCHES.  
PCPN AMOUNT.........0.00 INCHES.  
CEILING (KFT).......5.0 INCREASING TO 6.0 EARLY IN THE EVENING,  
THEN INCREASING TO 8.0 EARLY DECREASING TO 7.0  
LATE IN THE EVENING DECREASING TO 6.0  
DECREASING TO 4.5 DECREASING TO 3.5 DECREASING  
TO 2.5 EARLY IN THE MORNING DECREASING TO 1.5  
DECREASING TO 0.8 EARLY IN THE MORNING.  
VISIBILITY..........9 DECREASING TO 5 EARLY IN THE MORNING.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 8 MPH SHIFTING TO THE  
SOUTHWEST AROUND 5 MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....POOR (1800 KNOT-FT).  
LVORI...............6.  
ADI.................3 TO 18.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........49 47 45 46 47 48 51 55 58 64 70 77  
WEATHER COV..... PTY PTY  
WEATHER TYPE.... FOG FOG  
TSTM COV........  
CHC OF RAIN (%).20 20 20 0 0 0 0 0 0 0 0 10  
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............80 78 75 73 72 71 69 68 67 67 67 67  
RH..............74 76 84 90 90 90 97 97 100 100 97 97  
HEAT INDEX (F)..83 78 75 73 72 71 69 68 67 67 67 67  
APARNT TMP (F)..83 78 75 73 72 71 69 68 67 67 67 67  
20 FT WIND DIR..SE SE SE S S S S S S S SE SE  
20 FT WIND SPD..6 6 6 5 5 3 3 2 2 2 2 2  
20 FT WIND GUST.7 7 7 7 7 6 6 5 5 3 3 3  
EYE LVL WND DIR.SE SE SE S S S S S S S SE SE  
EYE LVL WND SPD.4 4 4 3 3 2 2 1 1 1 1 1  
EYE LVL WND GST. 4 4 4 4 3 3 2 2 2  
SURFACE WND DIR.SE SE SE S S S S S S S SE SE  
SURFACE WND SPD.6 6 6 5 5 3 3 2 2 2 2 2  
SURFACE WND GST.7 7 7 7 7 6 6 5 5 3 3 3  
MIX HGT (KFT)...1.7 1.1 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.4 0.4  
TRANSP WIND DIR.E SE SE SE S S S S S SW SW SW  
TRANSP WIND SPD.8 8 8 8 7 7 7 7 7 6 6 5  
100 FT WIND.....  
LVORI...........3 4 5 6 6 6 8 8 9 9 8 7  
ADI.............18 11 5 5 5 3 3 3 3 3 3 5  
VRATE KT-FT/1K..12 7 4 4 3 3 3 3 3 2 2 2  
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR  
CEILING (KFT)...5.0 6.0 8.0 7.0 7.0 7.0 6.0 4.5 3.5 2.5 1.5 0.8  
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 6 5  
   
SATURDAY  
 
SKY/WEATHER.........PARTLY SUNNY. PATCHY FOG EARLY IN THE MORNING.  
CHANCE OF RAIN......7 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
BEGIN/END OF PCPN...  
MAX TEMPERATURE.....AROUND 84.  
MIN HUMIDITY........65 PERCENT.  
MAX APPARENT TEMP...87.  
MAX APPARENT TEMP...87.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHEAST UP TO 4 MPH IN  
THE LATE MORNING AND AFTERNOON.  
SURFACE WINDS (MPH).SOUTHEAST WINDS 5 TO 7 MPH EARLY IN THE MORNING  
BECOMING LIGHT, THEN BECOMING SOUTHEAST 5 TO 7  
MPH IN THE LATE MORNING AND AFTERNOON.  
WIND (20 FT)........SOUTHEAST WINDS 5 TO 7 MPH EARLY IN THE MORNING  
BECOMING LIGHT, THEN BECOMING SOUTHEAST 5 TO 7  
MPH IN THE LATE MORNING AND AFTERNOON.  
100 FT WIND.........  
RAINFALL AMOUNT.....0.00 INCHES.  
PCPN AMOUNT.........0.00 INCHES.  
CEILING (KFT).......6.0 INCREASING TO 10 EARLY IN THE MORNING, THEN  
INCREASING TO 15 EARLY DECREASING TO 5.0 IN THE  
LATE MORNING AND AFTERNOON.  
VISIBILITY..........5 INCREASING TO 9 IN THE LATE MORNING AND  
AFTERNOON.  
MIXING HEIGHT.......2800 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 5 TO 6 MPH INCREASING TO 5 TO 8 MPH  
IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....POOR (2100 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO FAIR (19300 KNOT-FT) IN THE  
AFTERNOON.  
LVORI...............6.  
ADI.................5 TO 28.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........69 61 53 48 42 51 46 42 37 36 35 34  
WEATHER COV.....PTY PTY PTY  
WEATHER TYPE....FOG FOG FOG  
TSTM COV........  
CHC OF RAIN (%).0 0 0 0 10 10 10 10 10 10 10 10  
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............67 68 69 72 76 79 81 83 83 83 82 80  
RH..............100 97 97 93 82 74 69 65 65 65 65 69  
HEAT INDEX (F)..67 68 69 72 76 79 85 87 87 87 85 83  
APARNT TMP (F)..67 68 69 72 76 79 85 87 87 87 85 83  
20 FT WIND DIR..SE SE SE SE E E E SE SE SE SE SE  
20 FT WIND SPD..2 3 3 3 5 5 6 6 7 7 7 7  
20 FT WIND GUST.3 5 5 6 7 8 9 12 13 13 13 13  
EYE LVL WND DIR.SE SE SE SE E E E SE SE SE SE SE  
EYE LVL WND SPD.1 2 2 2 3 3 4 4 4 4 4 4  
EYE LVL WND GST.2 3 3 4 4 5 5 7 8 8 8 8  
SURFACE WND DIR.SE SE SE SE E E E SE SE SE SE SE  
SURFACE WND SPD.2 3 3 3 5 5 6 6 7 7 7 7  
SURFACE WND GST.3 5 5 6 7 8 9 12 13 13 13 13  
MIX HGT (KFT)...0.5 0.7 0.9 1.4 1.8 2.2 2.6 2.8 2.8 2.5 2.0 1.5  
TRANSP WIND DIR.S SE SE SE SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.5 6 5 5 5 5 6 7 8 8 7 7  
100 FT WIND.....  
LVORI...........9 7 7 6 4 3 3 3 3 3 3 3  
ADI.............5 6 6 8 11 12 19 25 28 25 18 14  
VRATE KT-FT/1K..2 3 4 5 7 9 13 17 19 17 12 9  
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR  
CEILING (KFT)...6.0 10 15 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0  
VISIBILITY (SM).5 6 6 9 9 9 9 9 9 9 9 9  
 
 
FORECASTER...LOCONTO  
REQUESTED BY...CHRIS DEPOTO  
TYPE OF REQUEST...OTHER  
.TAG 2517776.0/BOX  
.DELDT 07/10/25  
.FORMATTERVERSION 2.0.0  
.EMAIL CHRISTOPHER.DEPOTO@MASS.GOV  
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