BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 25, 2007
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Overcast altocumulus 
Temperature: 18F, Dew point: 12F, Wind: WNW at 06 kts 
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 30 miles
6-hourly min. temp. 18 deg. 
BHO SA 1155 E75 OVC 30 110/18/12/2906/986/ FEW SC N-E 
FEW ACSL NE BINOVC N-E HIER CLDS VSBL/ 8/54/ 53002 10025 20018
 
10 A.M.    
Weather: Scattered altocumulus, cirrus
Temperature: 22F, Dew point: 10F, Wind: NW at 08 kts 
Sea-level pressure: 29.82 inches Hg, falling     
Visibility: 30 miles, hazy   
BHO SA 1455 80 SCT 250 SCT 30 099/22/10/3208/982/ 
FEW DSNT SC NE-E HAZY/ 8/531 58011
 
1 P.M.    
Weather: Overcast
Temperature: 25F, Dew point: 9F, Wind: WNW at 12 kts 
Sea-level pressure: 29.74 inches Hg, falling    
Visibility: 60 miles, hazy  
6-hourly max. temp. 25 deg. 
BHO SA 1755 45 SCT 90 SCT E250 OVC 60 58029 070/25/9/2912/974/ 
HAZY/ 8/172 58029 10025 20018
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 24 
 
TEMPERATURE (DEGREES F)
MAX.....38    NORMAL.....33 
MIN.....22    NORMAL.....18   
MEAN....30    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL.........+4 
TOTAL DEPARTURE FOR THE MONTH.......+191 (+7.8 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........35   DEPARTURE.......-5
TOTAL HEATING UNITS FOR THE MONTH.........745   DEPARTURE.....-189 
TOTAL HEATING UNITS FOR THE SEASON.......2618   DEPARTURE.....-645
TOTAL HEATING UNITS LAST SEASON TO DATE..2879   DIFFERENCE....-261
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............30  W  AT  2:23 P.M.  
                   AEROVANE.............29  W  AT  2:23 P.M.   
                   ASOS.................28  W  AT  2:23 P.M.  
                   DAVIS................31  W  AT  2:23 P.M.  
FASTEST MILE FOR YESTERDAY..............22  W  AT  2:59 P.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE...........22  W  AT  2:59 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........23  W  AT  2:59 P.M. 
AVERAGE WIND SPEED AND DIRECTION......10.7 WSW 
                    ASOS...............11.6      
                    DAVIS..............11.1 W [266 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..........2.87  DEPARTURE......-0.86  
                         ASOS..............2.80    
TOTAL PRECIPITATION FOR THE YEAR...........2.87  DEPARTURE......-0.86  
                         ASOS..............2.80
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH................1.3   DEPARTURE....-10.7
TOTAL SNOWFALL FOR THE SEASON...............5.0   DEPARTURE....-20.6
 
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/.../..    23 NW
1/24 38/22/30/+4/0/0/.../..         30 W    Aero 29 W
 
1/25 morning low temp. 18 deg; normal now 18 deg.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 25
HIGH 55F IN 1990
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972
 
RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD FOR MONTH]
LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978
 
TODAY'S REPORT By: Stephanie Radner