BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 29, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:

7 A.M. 
Weather: Clear, few cirrus W-N-NE, hazy
Temperature: 23F, Dew point: 18F, Wind: WSW at 11 kts
Sea-level pressure: 29.76 inches Hg, rising
Visibility: 25 miles, hazy
6-hour minimum temperature: 23F
24-hour precip: 1.27 ins.
24-hour snowfall: 3.8 ins.
Storm total precip: 1.30 ins.
Storm total snowfall: 4.1 ins.
Snow depth on ground: 15 inches
BHO SA 1155 CLR 25 079/23/18/2511/976/ FEW CI W-N-NE HAZY
TOTAL NEW SNW PST 24 HRS 3.8 INS/ 8/001 4/015 53038
MANUAL 70127 ASOS 70123 10032 20023
 
10 A.M.
Weather: Clear, cumulus fractus forming S-NW,
few cirrus distant NW, light haze
Temperature: 28F, Dew point: 17F, Wind: W at 10 kts
Sea-level pressure: 29.84 inches Hg, rising
Visibility: 30 miles, light haze
BHO SA 1455 CLR 30 106/28/17/2610/984/ CUFRA FRMG S-NW
FEW CI DSNT NW LGT HZ/ 8/101 50027
 
1 P.M.  
Weather: Scattered stratocumulus, light haze
Temperature: 33F, Dew point: 20F, Wind: WSW at 7 kts,
Wind: Variable direction S-W
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 40 miles, light haze
6-hour maximum temperature: 34F
BHO SA 1755 30 SCT 40 101/33/20/2407/983/ LGT HZ WND 18V28/
8/500 58005 10034 20023
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 28
 
TEMPERATURE (DEGREES F)
MAX.....37    NORMAL.....34 
MIN.....19    NORMAL.....18
MEAN....28    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............+2
TOTAL DEPARTURE FOR THE MONTH.............-116  [-3.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............37  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH...........1208  DEPARTURE.......+118
TOTAL HEATING UNITS FOR THE SEASON..........3448  DEPARTURE........+29
TOTAL HEATING UNITS LAST SEASON TO DATE.....3142  DIFFERENCE......+306
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............39 WSW AT 11:52 P.M.
                   AEROVANE.............38 SW  AT 10:37 P.M.  
                   ASOS.................38 W   AT 11:52 P.M.  
                   DAVIS................36 W   AT 11:57 P.M.  
FASTEST MILE FOR YESTERDAY..............29 WSW AT 11:57 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........29 W   AT 11:43 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........27 WSW AT 11:58 P.M.  
                   AVERAGE.............12.0 E
                   ASOS................12.7  
                   DAVIS...............N/A (DAVIS INSTRUMENTS FROZEN FOR
                                            APPROX. 8 HOURS ON JANUARY 28)
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....1.27  DEPARTURE.........+1.12
                         ASOS...............1.23
TOTAL PRECIPITATION FOR THE MONTH...........4.16  DEPARTURE.........-0.17
                         ASOS...............5.20 #
TOTAL PRECIPITATION FOR THE YEAR............4.16  DEPARTURE.........-0.17
                         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..........3.8   DEPARTURE.........+3.3
TOTAL SNOWFALL FOR THE MONTH...............24.7   DEPARTURE........+10.7
TOTAL SNOWFALL FOR THE SEASON..............55.1   DEPARTURE........+27.5
 
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 morning low temp: 23F; 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 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973
 
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
 
TODAY'S REPORT PREPARED By: Stephanie Radner