BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, FEBRUARY 1, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Overcast stratocumulus
Temperature: 20F, Dew point: 9F, Wind: S at 14 kt
Sea-level pressure: 29.95 inches Hg, falling
Visibility: 15 miles, hazy
6-hour minimum temperature: 15F
Snow depth on ground: 13 inches
BHO SA 1155 50 OVC 15 141/20/9/1714/995/
FEW BINOVC ALQDS HAZY/ 8/5// 4/013 55007 10020 20015
 
10 A.M.
Weather: Broken altocumulus; thin overcast cirrus
Temperature: 31F, Dew point: 20F, Wind: S at 16G22 kt
Sea-level pressure: 29.90 inches Hg, falling
Visibility: 25 miles, hazy
BHO SA 1455 180 SCT 250 –OVC 25 126/31/20/1916G22/990/
HAZY/ 8/071 58015
 
1 P.M.  
Weather: Broken cirrus
Temperature: 43F, Dew point: 22F, Wind: SW at 19G30 kt
Sea-level pressure: 29.86 inches Hg, falling
Visibility: 30 miles
6-hour maximum temperature: F
BHO SA 1755 200 BKN 30 111/43/22/2219G30/986/
HAZY PK WND 2230/1754/ 8/002 58015 10043 20020
 
WEATHER SUMMARY FOR SATURDAY, JANUARY 31
 
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.............-119  [-4.0 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............44  DEPARTURE.........+5
TOTAL HEATING UNITS FOR THE MONTH...........1328  DEPARTURE.......+121
TOTAL HEATING UNITS FOR THE SEASON..........3568  DEPARTURE........+32
TOTAL HEATING UNITS LAST SEASON TO DATE.....3237  DIFFERENCE......+331
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............38   W AT 2:03 P.M.
                   AEROVANE.............36   W AT 1:50 P.M. 
                   ASOS.................36  NW AT 3:07 P.M.
                   DAVIS................35   W AT 3:06 P.M.
FASTEST MILE FOR YESTERDAY..............34   W AT 1:51 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........29 WNW AT 1:50 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........28   W AT 1:50 P.M.
                   AVERAGE............15.9   W
                   ASOS...............15.1
                   DAVIS..............14.3   W [262 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.........-0.62
                         ASOS...............5.20 #
TOTAL PRECIPITATION FOR THE YEAR............4.16  DEPARTURE.........-0.62
                         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.........+8.9
TOTAL SNOWFALL FOR THE SEASON..............55.1   DEPARTURE........+25.7
 
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 36/17/27/+1/0/0/.../..          25 SSW
1/31 26/15/21/-5/0/0/.../..          38 W
  
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 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 PREPARED By: Andrew Hoell