BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 30, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
COLDER THAN NORMAL TEMPERATURES AGAIN TODAY
PAST TWO WEEKS AVERAGE 5 DEGREES COLDER THAN NORMAL
 
Today becomes the 11th out of the past 14 days to average
colder than normal with a departure of 5 degrees below 
normal during this period.  After running 12 degrees on 
the warm side of normal through the first 16 days of the
month our monthly departure is now back less than 5 degrees
warmer than average and will not rank anywhere near the 
top ten warmest Januarys.  
 
Today's observations:
 
7 A.M.   
Weather: Clear, clouds offshore NNE-E-S-SSW  
Temperature: 13F, Dew point: 04F, Wind: SW at 13 kts 
Sea-level pressure: 29.95 inches Hg, rising
Visibility: 40 miles, light haze 
6-hourly min. temp. 13 deg. 
BHO SA 1155 CLR 40 142/13/4/2313/995/ SC LYR CUFRM TOPS ALG/OFFSHR NNE-E
AND DSNT ESE-S-SSW FEW ACSL DSNT S AND DSNT NW-N LGT HAZE/
8/540 53009 10015 20013 
  
10 A.M.    
Weather: Clear, just a few clouds  
Temperature: 22F, Dew point: 06F, Wind: WSW at 15G22 kts 
Wind: Peak wind 26 kts WSW @ 18 past the hour
Sea-level pressure: 29.96 inches Hg, falling      
Visibility: 50 miles 
BHO SA 1455 CLR 50 147/22/6/2415G22/996/ FEW CUFRA/CU FRMG W-N 
FEW SC CUFRM TOPS ALG SHR NE-E ACSL AND FEW CI W-N PK WND 2426/18/ 
8/841 50005 
 
1 P.M.    
Weather: Scattered cumulus  clouds  
Temperature: 26F, Dew point: 05F, Wind: WSW at 16G25 kts 
Wind: Variability SSW-W 
Sea-level pressure: 29.90 inches Hg, falling 
Visibility: 55 miles 
6-hourly max. temp. 28 deg.  
BHO SA 1755 50 SCT 55 126/26/5/2416G25/990/ 
WND 21V27/ 8/100 58021 10028 20013
 
WEATHER SUMMARY FOR MONDAY, JANUARY 29 
 
TEMPERATURE (DEGREES F)
MAX.....26    NORMAL.....34 
MIN.....15    NORMAL.....18   
MEAN....21    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL........- 5 
TOTAL DEPARTURE FOR THE MONTH.......+147 (+4.9 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........44   DEPARTURE......+ 5
TOTAL HEATING UNITS FOR THE MONTH.........987   DEPARTURE.....-145 
TOTAL HEATING UNITS FOR THE SEASON.......2860   DEPARTURE.....-598
TOTAL HEATING UNITS LAST SEASON TO DATE..3032   DIFFERENCE....-172
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............33   W AT  4:11 P.M. * 
                   AEROVANE.............36   W AT  3:50 P.M.  
                   ASOS.................31   W AT  4:11 P.M. 
                   DAVIS................35   W AT  3:50 P.M.  
FASTEST MILE FOR YESTERDAY..............25   W AT  3:52 P.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE...........25 WNW AT  2:53 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........28   W AT  2:54 P.M.  
AVERAGE WIND SPEED AND DIRECTION......15.1 WNW   
                    ASOS..............15.2       
                    DAVIS.............15.6 WNW [290 deg]  
 
* last of several occurrences...
 
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..........2.91  DEPARTURE.....-1.57  
                         ASOS..............2.84    
TOTAL PRECIPITATION FOR THE YEAR...........2.91  DEPARTURE.....-1.57  
                         ASOS..............2.84
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0  DEPARTURE......-0.6
TOTAL SNOWFALL FOR THE MONTH................1.9  DEPARTURE.....-12.7
TOTAL SNOWFALL FOR THE SEASON...............5.6  DEPARTURE.....-22.6
 
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/-3/0.13/0.1/171/30    33 SSE
1/19 38/30/34/+9/0.06/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 morning low temp. 13 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 JANUARY 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962
 
RECORDS FOR JANUARY 31
HIGH 58F IN 1913, 1947
LOW -12F IN 1920
PRECIP 1.03 INS. IN 1914
SNOWFALL 9.0 INS. IN 1898
PEAK GUST 75 MPH NW IN 1974
 
TODAY'S REPORT By: Robert Skilling
 
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