BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 1, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Overcast altostratus
Temperature: 20F, Dew point: 10F, Wind: SSE at 8 kts 
Sea-level pressure: 30.11 inches Hg, rising
Visibility: 12 miles, hazy 
6-hourly min. temp. 20 deg. 
BHO SA 1155 E150 OVC 12 195/20/10/1608/011/ HAZY/ 
8/01/ 53002 10021 20020
  
10 A.M.    
Weather: Overcast altostratus
Temperature: 26F, Dew point: 12F, Wind: S at 16 kts 
Sea-level pressure: 30.09 inches Hg, falling      
Visibility: 25 miles, hazy 
BHO SA 1455 E150 OVC 25 190/26/12/1916/009/ HAZY/ 8/01/ 58005
 
1 P.M.    
Weather: Overcast cirrostratus
Temperature: 33F, Dew point: 11F, Wind: SW at 16G24 kts 
Peak wind: 32 kts S at 12:38 P.M.
Sea-level pressure: 30.02 inches Hg, falling 
Visibility: 30 miles, hazy
6-hourly max. temp. 33 deg.  
BHO SA 1755 220 SCT E250 OVC 30 167/33/11/2216G24/002/ 
FEW CU OVC PTLY THN HAZY PK WND 1932/38/ 8/107 58023 10020 20033
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 31 
 
TEMPERATURE (DEGREES F)
MAX.....30    NORMAL.....34 
MIN.....14    NORMAL.....18   
MEAN....22    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL........- 4 
TOTAL DEPARTURE FOR THE MONTH.......+138 (+4.3 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........43   DEPARTURE......+ 4
TOTAL HEATING UNITS FOR THE MONTH........1071   DEPARTURE.....-136 
TOTAL HEATING UNITS FOR THE SEASON.......2944   DEPARTURE.....-592
TOTAL HEATING UNITS LAST SEASON TO DATE..3094   DIFFERENCE....-150
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29 W   AT  2:37 P.M.  
                   AEROVANE.............29 W   AT  2:37 P.M.    
                   ASOS.................28 WSW AT  2:27 P.M.  
                   DAVIS................31 W   AT  2:37 P.M.  
FASTEST MILE FOR YESTERDAY..............23 W   AT  2:37 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........21 W   AT  2:49 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 W   AT  2:49 A.M.   
AVERAGE WIND SPEED AND DIRECTION......11.0 WNW 
                    ASOS..............11.3       
                    DAVIS.............11.5 W  [265 deg]   
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.00  DEPARTURE.....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.94  DEPARTURE.....-1.84  
                         ASOS..............2.87    
TOTAL PRECIPITATION FOR THE YEAR...........2.94  DEPARTURE.....-1.84  
                         ASOS..............2.87
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0  DEPARTURE......-0.6
TOTAL SNOWFALL FOR THE MONTH................2.9  DEPARTURE.....-12.9
TOTAL SNOWFALL FOR THE SEASON...............6.6  DEPARTURE.....-22.8
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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
 
1/1  53/30/42/+15/0.98/0/000/00     38 SE 
1/2  43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   
1/3  49/30/40/+13/0/0/435/79        40 S   
1/4  53/40/47/+20/0/0/198/36        31 SSW
1/5  61/46/54/+27/0.04/0/000/00     44 S    Aero 44 MPH S
1/6  66/48/57/+31/0.03/0/161/29     48 SSW  Aero 47 MPH SSW 
1/7  50/38/44/+18/0/0/505/91        43 W    Aero 44 MPH W 
1/8  52/36/44/+18/0.69/0/000/00     45 W    Aero 45 MPH W 
1/9  41/29/35/+9/0/0/518/93         40 W    Aero 39 MPH W
1/10 34/22/28/+2/0/0/525/94         48 W
1/11 33/17/25/-1/0/0/336/60         36 S    Aero 38 MPH S
1/12 48/32/40/+14/0/0/168/30        38 SSW  Aero 39 MPH SSW
1/13 48/36/42/+16/0.06/000/00       30 S     
1/14 38/31/35/+9/0.16/0/000/00      21 NE
1/15 40/31/36/+10/0.58/0/000/00     25 NNE
1/16 38/15/27/+1/0.05/0/000/00      40 W    Aero 42 MPH W
1/17 18/6/12/-14/0.00/0/563/99      38 WNW  Aero 43 MPH WNW
1/18 36/10/23/-3/0.15/0.1/171/30    33 SSE
1/19 38/30/34/+9/0.04/T/269/47      40 W    Aero 41 MPH W
1/20 30/12/21/-4/T/T/402/70         51 W    Aero 55 MPH WNW
1/21 24/9/17/-8/0/0/449/78          33 W 
1/22 24/18/21/-4/0.05/1.0/000/00    16 WNW
1/23 30/18/24/-1/0.01/0.2/110/19    23 NW
1/24 38/22/30/+4/0/0/448/77         30 W
1/25 26/6/16/-10/T/T/356/61         30 NW  
1/26 11/-1/5/-21/0/0/563/96         38 WNW  Aero 39 MPH WNW
1/27 25/2/14/-12/T/T/000/00         23 W 
1/28 37/23/30/+4/0.04/0.6/408/69    21 W  
1/29 26/15/21/-5/T/T/546/92         33 W    Aero 36 MPH W 
1/30 29/13/21/-5/0.01/0.3/589/99    30 WSW  Aero 33 MPH WSW
1/31 30/14/22/-4/0/0/508/85         29 W
 
2/1 morning low temp. 20 deg; normal now 18 deg.  
 
NEW DAILY RECORDS ESTABLISHED FOR JANUARY 2007
 
1/5 – NEW RECORD HIGH MAXIMUM TEMP. OF 61 DEG; 
the previous record was 58 degrees in 1950.  
NEW RECORD HIGH MINIMUM TEMP. OF 46 degrees; 
the previous record was 42 degrees in 1950. 
 
1/6 – NEW RECORD HIGH MAXIMUM TEMP. OF 66 DEG;
the previous record was 60 degrees in 1913.  
NEW RECORD HIGH MINIMUM TEMP. OF 48 degrees; 
the previous record was 39 degrees in 1946, 1950, and 1998. 
In addition, 66 degrees is 2nd highest temp. for any January 
after 68 deg. recorded on Jan. 26, 1950.
 
1/26 – NEW RECORD LOW MAXIMUM TEMP. OF 11 DEG; 
the previous record was 12 degrees in 1905, 1912, and 1945.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 1
HIGH 65F IN 1989
LOW -9F IN 1920
PRECIP 1.30 INS. IN 1898
SNOWFALL 11.0 INS. IN 1898
PEAK GUST 66e MPH SSW IN 1951
 
RECORDS FOR FEBRUARY 2
HIGH 55F IN 1951, 1973
LOW -12F IN 1961
PRECIP 1.91 INS. IN 1999
SNOWFALL 5.5 INS. IN 1916, 1934
PEAK GUST 92 MPH SW IN 1970
 
TODAY'S REPORT By: Stephanie Radner