BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 30, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M.
Weather: Clear, few cirrus distant north, dark smoke
layer SW-N, thin fog/haze
Temperature: 18F, Dew point: 14F, Wind: SW at 9 kts
Sea-level pressure: 29.93 inches Hg, rising
Visibility: 15 miles
6-hour minimum temperature: 17F
Snow depth on ground: 14 inches
BHO SA 1155 CLR 15 134/18/14/2209/993/
FEW CI DSNT N DRK K LYR SW-N INVSN PRSNT THN FH/
8/001 4/014 53004 10019 20017
 
10 A.M.
Weather: Clear, few cirrus distant northwest,
thin smoke layer SW-NW, hazy
Temperature: 27F, Dew point: 17F, Wind: SSW at 6 kts
Sea-level pressure: 29.91 inches Hg, falling
Visibility: 10 miles, hazy
BHO SA 1455 CLR 10 130/27/17/2106/991/
FEW CI DSNT NW THN K LYR SW-NW HAZY/ 8/001 58004
 
1 P.M.  
Weather: Clear, few stratocumulus SW-N, hazy
Temperature: 35F, Dew point: 19F, Wind: S at 11 kts
Sea-level pressure: 29.85 inches Hg, falling
Visibility: 15 miles, hazy
6-hour maximum temperature: 35F
BHO SA 1755 CLR 15 107/35/19/1911/985/
FEW SC SW-N HAZY/ 8/500 58023 10036 20018
 
WEATHER SUMMARY FOR THURSDAY, JANUARY 29
 
TEMPERATURE (DEGREES F)
MAX.....34    NORMAL.....34 
MIN.....20    NORMAL.....18
MEAN....27    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............+1
TOTAL DEPARTURE FOR THE MONTH.............-115  [-3.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............38  DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE MONTH...........1246  DEPARTURE.......+117
TOTAL HEATING UNITS FOR THE SEASON..........3486  DEPARTURE........+28
TOTAL HEATING UNITS LAST SEASON TO DATE.....3173  DIFFERENCE......+313
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............48 WSW AT  3:05 A.M.
                   AEROVANE.............50 WSW AT  3:04 A.M.  
                   ASOS.................48 W   AT  3:05 A.M.  
                   DAVIS................45 WSW AT  3:04 A.M.  
FASTEST MILE FOR YESTERDAY..............39 W   AT  3:04 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........32 W   AT  3:06 A.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........32 W   AT  3:05 A.M.  
                   AVERAGE.............15.5 WSW
                   ASOS................14.6
                   DAVIS...............13.5 WSW  [254 DEGREES]
 
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...........4.16  DEPARTURE.........-0.32
                         ASOS...............5.20 #
TOTAL PRECIPITATION FOR THE YEAR............4.16  DEPARTURE.........-0.32
                         ASOS...............5.20 #
# Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.6
TOTAL SNOWFALL FOR THE MONTH...............24.7   DEPARTURE........+10.1
TOTAL SNOWFALL FOR THE SEASON..............55.1   DEPARTURE........+26.9
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
   TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
1/1  16/1/9/-18/0/0/538/98           44 WNW   Aero 44 MPH WNW
1/2  32/9/21/-6/0/0/005/01           28 S
1/3  32/21/27/0/T/T/539/98           43 WNW   Aero 44 MPH WNW
1/4  35/17/26/-1/0/0/512/93          36 W     Aero 33 MPH W
1/5  36/26/31/+4/0.06/0/000/00       30 W   
1/6  33/21/27/+1/0/0/183/33          27 W 
1/7  36/26/31/+5/1.26/0.8/000/00     46 NE    Aero 45 MPH NE
1/8  38/21/30/+4/0.01/0.1/389/70     47 W     Aero 45 MPH W
1/9  25/16/21/-5/0/0/546/98          37 W     Aero 36 MPH W
1/10 24/11/18/-8/0.10/1.0/329/59     28 W
1/11 31/19/25/-1/0.55/5.3/000/00     30 NW
1/12 27/18/23/-3/0.02/0.4/410/73     24 WNW
1/13 34/16/25/-1/0.04/T/107/19       25 SE
1/14 33/10/22/-4/0/0/518/92          47 W     Aero 48 MPH W
1/15 16/5/11/-15/0/0/000/00          20 NW
1/16 17/0/9/-17/0/0/557/98           26 W
1/17 19/1/10/-16/0/0/450/79          23 W
1/18 29/14/22/-4/0.58/9.5/000/00     24 E
1/19 32/19/26/+1/0.24/3.5/057/10     18 NW
1/20 30/17/24/-1/T/T/247/43          30 NW
1/21 23/9/16/-9/0/0/462/80           25 SW
1/22 31/14/23/-2/0/0/493/85          31 SW
1/23 39/24/32/+7/0/0/378/65          31 S
1/24 36/9/23/-3/0/0/280/48           40 W    Aero 42 MPH W
1/25 23/3/13/-13/0/0/532/91          25 SW
1/26 25/10/18/-8/0/0/535/91          17 W
1/27 27/14/21/-5/0/0/.../..          22 W
1/28 37/19/28/+2/1.30/4.1/000/00     39 WSW
1/29 34/20/27/+1/0/0/.../..          48 WSW  Aero 50 MPH WSW
 
1/30 morning low temp: 17F; our normal low is now 18F
  
NEW DAILY RECORDS FOR JANUARY 2009...
 
..NONE..
 
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 PREPARED By: Stephanie Radner