Fire Weather Planning Forecast for Southern New England
National Weather Service Boston/Norton MA
419 PM EDT Sat Apr 10 2021

.DISCUSSION...  

A backdoor cold front moves south from Maine late tonight followed 
by much cooler northeast winds Sunday. A weak wave of low pressure 
tracks south of New England, with its rain shield overspreading 
MA/CT/RI Sunday afternoon and night. A light rainfall is expected. 

Minimum relative humidities Sunday will range from 60 to 70 percent 
inland to 75 to 85 percent along the coast including Cape Cod and 
the Islands.

OUTLOOK...Monday through Friday... 

High pressure over Quebec combined with a series of weak lows 
passing south of New England, will result in periods of light rain 
and cool temperatures much of next week. Not a washout as there will 
be periods of dry weather.

Southeast Middlesex MA-
Including the cities of Cambridge, Lexington, Newton, Waltham, 
and Woburn
420 PM EDT Sat Apr 10 2021

                      Tonight      Sun          Sun Night    Mon          

Cloud Cover           Pcldy        Cloudy       Cloudy       Mcldy        
Precip Type           None         Showers      Showers      Showers      
Chance Precip (%)     20           30           40           40           
Temp (24h trend)      47 (+1)      50 (-25)     43           52           
RH % (24h trend)      96 (0)       68 (+30)     93           56           
20ft Wnd AM(mph)                   NE  6                     NE  7        
20ft Wnd PM(mph)      SW  6        NE  8        NE  7        NE 10 G17    
Precip Amount         0.01         0.01         0.02         0.01         
Precip Duration                    1            2            1            
Precip Begin          5 AM         1 PM         Continuing   Continuing   
Precip End            6 AM         Continuing   Continuing   5 PM         
Mixing Hgt (ft-AGL)   210          1870         820          2950         
Transport Wnd (kts)   SW  7        E 14         NE  9        NE 16        
Vent Rate (kt-ft)     1470         26180        7380         47200        
ADI early             45 Gen Good  21 Fair      21 Fair      42 Gen Good  
ADI late              6 Very Poor  29 Fair      10 Poor      46 Gen Good  
Max LVORI early       4            6            4            4            
Max LVORI late        6            3            4            1            
CWR                   0            0            10           10           
LAL                   No Tstms     No Tstms     No Tstms     No Tstms     
Haines Index          4            5            3            3            

REMARKS...None.

.FORECAST FOR DAYS 3 THROUGH 7...
.MONDAY NIGHT...Mostly cloudy. Lows around 40. North winds 5 to
10 mph. 
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with a chance of
showers. Lows in the lower 40s. Highs in the mid 50s. Northeast
winds 5 to 10 mph. 
.WEDNESDAY NIGHT...Mostly cloudy. Lows in the upper 30s. North
winds around 5 mph. 
.THURSDAY...Partly sunny. Highs in the upper 50s. Northeast winds
5 to 10 mph. 
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows around 40. Highs
in the mid 50s. East winds 5 to 10 mph. 
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows around 40. Highs
in the mid 50s. East winds around 5 mph.