BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 23, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered stratus, overcast nimbostratus 
Temperature: 28F, Dew point: 27F, Wind: NW at 11 kts 
Sea-level pressure: 29.65 inches Hg, rising 
Visibility: 9 miles, variable 8-10 miles  
6-hourly min. temp. 28 deg.
24-hourly precip: 0.12 ins.
24-hourly snowfall: 1.5 ins.
Snow on ground: 2 ins.
BHO SA 1155 10 SCT E40 OVC 9VSW- 040/28/27/3211/965/ VSBY 8V10 
PCPN VRY LGT THN FG TOTAL NEW SNW PST 24 HRS 1.5 INS/ 8/72/ 4/002 
53027 ASOS 60007 MANUAL 6009/ ASOS 70009 MANUAL 70012 10031 20028
 
10 A.M.    
Weather: Scattered cumulus, altocumulus 
Temperature: 27F, Dew point: 15F, Wind: NW AT 14G24 kts  
Peak wind: NW @ 28 kts at 9:30 A.M.
Sea-level pressure: 29.70 inches Hg, rising 
Visibility: 65 miles  
BHO SA 1455 20 SCT 140 SCT 65 058/27/15/3114G24/970/ FEW CU N-E-S 
FEW AC/ACSL W-NW AND N VSBY WNW 75 PK WND 3128/30 WND 25V35/ 
8/840 51018
 
1 P.M.    
Weather: Scattered cirrus, few cumulus
Temperature: 30F, Dew point: 11F, Wind: WNW AT 18G29 kts
Peak wind: WNW @ 34 kts at 12:53 P.M.
Sea-level pressure: 29.69 inches Hg, falling 
Visibility: 70 miles, light haze   
6-hourly max. temp. 30 deg.  
BHO SA 1755 250 SCT 70 055/30/11/2918G29/969/ FEW CU ALQDS 
LGT HZ PK WND 3031/14 WND 23V33/ 8/101 58003 10030 20025
 
WEATHER SUMMARY FOR THURSDAY, FEBRUARY 22
 
TEMPERATURE (DEGREES F)
MAX.....39    NORMAL.....38 
MIN.....28    NORMAL.....22   
MEAN....34    NORMAL.....30
 
DEPARTURE FROM 30-YEAR NORMAL.........+ 4
TOTAL DEPARTURE FOR THE MONTH........-110 (-4.8 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........31   DEPARTURE.......- 5
TOTAL HEATING UNITS FOR THE MONTH.........932   DEPARTURE......+115 
TOTAL HEATING UNITS FOR THE SEASON.......3876   DEPARTURE......-487
TOTAL HEATING UNITS LAST SEASON TO DATE..3836   DIFFERENCE......+40
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............22 SSE AT 10:54 A.M.      
                   AEROVANE.............20 SE  AT  1:34 P.M.      
                   ASOS.................20 SSE AT 10:55 A.M.     
                   DAVIS................22 SSE AT 10:56 A.M.       
FASTEST MILE FOR YESTERDAY..............16 SE  AT 10:56 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........16 SSE AT 10:58 A.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE..........17 SE  AT 10:54 A.M.     
AVERAGE WIND SPEED AND DIRECTION......8.1 SE  
                    ASOS..............8.9      
                    DAVIS.............8.2 SE [144 deg] 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.12  DEPARTURE.....-0.03
                         ASOS..............0.09
TOTAL PRECIPITATION FOR THE MONTH..........2.47  DEPARTURE.....-0.69  
                         ASOS..............2.45    
TOTAL PRECIPITATION FOR THE YEAR...........5.41  DEPARTURE.....-2.53  
                         ASOS..............5.32
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........1.5  DEPARTURE......+1.0
TOTAL SNOWFALL FOR THE MONTH................3.8  DEPARTURE......-9.2  
TOTAL SNOWFALL FOR THE SEASON..............10.4  DEPARTURE.....-32.0 
 
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
2/1  35/20/28/+2/0/0/126/21         37 S    Aero 34 MPH S
2/2  35/28/32/+6/0.18/0.3/000/00    20 NW
2/3  32/19/26/0/0.05/0.4/574/95     39 W    Aero 47 MPH W  
2/4  22/10/16/-10/0/0/601/99        39 WSW  Aero 40 MPH WSW
2/5  16/5/11/-16/0/0/493/81         61 W    Aero 60 MPH W  
2/6  24/10/17/-10/0/0/593/97        38 W    Aero 36 MPH W 
2/7  21/8/15/-12/0/0/474/77         43 W    Aero 41 MPH W
2/8  25/11/18/-9/0/0/370/60         48 WSW
2/9  26/15/21/-6/0/0/600/97         44 WSW  Aero 42 MPH WSW
2/10 32/13/23/-4/0/0/199/32         28 W     
2/11 31/14/23/-4/0/0/456/73         27 SSW  
2/12 36/20/28/0/0/0/602/96          43 WSW  Aero 40 MPH W  
2/13 22/6/14/-14/0.02/0.2/226/36    28 NW   
2/14 36/13/25/-3/2.09/1.4/000/00    47 NE   Aero 52 MPH NE
2/15 21/9/15/-13/0/0/616/97         46 W    Aero 53 MPH W
2/16 27/9/18/-10/0/0/624/98         51 W    Aero 49 MPH W
2/17 34/17/26/-3/0/0/596/93         42 W
2/18 33/16/25/-4/0/0/289/45         38 WNW  Aero 40 MPH WNW  
2/19 20/5/13/-16/0/0/646/100        46 WNW  Aero 51 MPH WNW 
2/20 48/17/33/+4/T/0/266/41         35 SSW  Aero 34 MPH SSW  
2/21 44/30/37/+8/0/0/606/93         29 W    Aero 28 MPH WNW
2/22 39/28/34/+4/.../.../007/01     22 SSE  Aero 20 MPH SE
 
2/23 morning low temp. 25 deg; normal now 22 deg.
 
2/14 - NEW RECORD DAILY PRECIPITATION OF 2.09 INCHES;  
the previous record was 1.95 inches in 1940.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 23
HIGH 62F IN 1990
LOW -8F IN 1907
PRECIP 1.48 INCHES IN 1967
SNOWFALL 10.6 INCHES IN 1967
PEAK GUST 73 MPH WNW IN 1974
 
RECORDS FOR FEBRUARY 24
HIGH 68F IN 1985 [RECORD FOR MONTH]
LOW -11F IN 1894
PRECIP 3.10 INCHES IN 1969
SNOWFALL 27.4 INCHES IN 1969 [HIGHEST CALENDAR DAY AMOUNT ON RECORD]
PEAK GUST 63 MPH NE IN 1998
 
TODAY'S REPORT By: Stephanie Radner