BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 3, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

SNOW FLURRIES LEAVE TRACE OF SNOW,
CLOUDS INCREASE THROUGH EARLY AFTERNOON

A brief snow shower passed yesterday afternoon leaving
a trace of snowfall. Today has seen increasing high clouds
and temperatures remaining below freezing.  Visibility
continues to be quite clear at 70 miles with little fog or
haze in the distance.
 

PRELIMINARY STATS FOR JANUARY 2017
 
TEMPERATURE, Deg. F
Avg. Max. 38.9 [+5.1]
Avg. Min. 26.4 [+9.3]
Mean      32.7 [+7.2]
24-hour corrected mean: 32.7
Max. for month: 59F on 12th
Min. for month:  4F on  9th
 
HEATING DEGREE DAYS
Total heating units: 995 [-231] 
Total for the season: 3027 [-504]
Total for last season: 2742

PRECIPITATION, Inches
Total: 5.50 [+1.15]
Greatest in 24 hrs: 1.87 on the 23-24th

SNOWFALL, Inches
Total: 13.0 [-4.1]
Greatest in 24 hrs: 9.5 in. on 7-8th
 
WIND, mph
Avg. uncorrected wind speed: 13.1
Avg. corrected wind speed: 13.5
Prevailing wind direction: WNW at 13%
Peak gust and direction: 62 NE on 24th
 
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

The 24-hour corrected mean temperature for January of
32.7 deg F is the ninth warmest on record.

BHO Warmest January Corrected Mean Temperatures, deg F (1885-2017)

1) 35.6 in 1913
2) 35.0 in 1932
3) 34.6 in 1937
4) 33.9 in 2006
5) 33.8 in 1933
   33.8 in 1950
   33.8 in 1990
8) 33.5 in 2002
9) 32.7 in 2017
10)32.1 in 1967
   32.1 in 1995   

Today's Observations:

7 A.M.
Weather: Few distant cumulus NNE-E, few cirrostratus 
Temperature: 20F; Dew Point: 12F; Wind: WSW at 9 kts
Sea-level pressure: 30.17 ins. Hg, steady then rising
Visibility: 70 miles 
6-hr Max temp: 25F
6-hr Min temp: 20F
24-hr precip: Trace
24-hr snowfall: Trace
BHO SA 1155 CLR 70 216/20/12/2509/017/ FEW DSNT CU NNE-E FEW 
CS E-NW NEW SNW PST 24 HRS TRACE/ 8/105 53010 10025 20020

10 A.M.
Weather: Few distant cumulus NNE-E, broken cirrostratus 
Temperature: 25F; Dew Point: 11F; Wind: W at 8 kts
Sea-level pressure: 30.17 ins. Hg, falling, then steady
Visibility: 70 miles
BHO SA 1455 E250 BKN 70 218/25/11/2708/017/ FEW DSNT CU NNE-E/ 
8/106 51002

1 P.M.
Weather: Few distant cumulus WSW-NNE, broken cirrostratus
Temperature: 29F; Dew Point: 11F; Wind: SW at 10G16 kts
Sea-level pressure: 30.08 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 30F
6-hr Min temp: 19F
BHO SA 1755 E250 BKN 70 187/29/11/2310G16/008/ FEW DSNT CU 
WSW-NNE/ 8/106 58031 10030 20019


SUMMARY FOR THURSDAY, FEBRUARY 2, 2017
 
TEMPERATURE (DEGREES F)
MAX.....38   NORMAL.....35
MIN.....25   NORMAL.....17
MEAN....32   NORMAL.....26

DEPARTURE FROM 30-YEAR NORMAL........................+6
TOTAL DEPARTURE FOR THE MONTH.......................+12 [+5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............33   DEPARTURE..........-6
TOTAL HEATING UNITS FOR THE MONTH..............66   DEPARTURE.........-13
TOTAL HEATING UNITS FOR THE SEASON...........3093   DEPARTURE........-516
TOTAL HEATING UNITS LAST SEASON TO DATE......2780   DIFFERENCE.......+313

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................36 WNW AT 2:46 P.M.
                   ASOS........................37 W   AT 2:35 P.M.
                   DAVIS.......................36 WNW AT 1:26 P.M. RMY 36
FASTEST MILE FOR YESTERDAY.....................27 WNW AT 2:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................26 WNW AT 2:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................28 W   AT 2:36 P.M.
AVERAGE WIND SPEED AND DIRECTION.............13.3 WNW 
                   ASOS......................12.7
                   DAVIS.....................12.0 WNW [290 deg.]
*last of multiple occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.03  DEPARTURE......-0.24
                         ASOS..............N/A
TOTAL PRECIPITATION FOR THE YEAR...........5.53  DEPARTURE......+0.91
                         ASOS..............5.91

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M........Trace  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH................0.4  DEPARTURE.......-0.6
TOTAL SNOWFALL FOR THE SEASON..............21.2  DEPARTURE......-12.9


PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
M:    Missing data

1/1   41/29/35/+8/0.09/0.0/533/97           35 W   AERO 36 W   RMY 34
1/2   38/29/34/+7/0.00/0.0/011/02           21 E   AERO 20 E   RMY N/A  
1/3   42/37/40/+14/1.14/0.0/000/00          39 ENE AERO 41 ENE RMY 34
1/4   44/30/37/+11/0.11/T/000/00            41 WNW AERO 46 WNW RMY 45 
1/5   30/23/27/+1/0.00/0.0/343/62           37 W   AERO 39 W   RMY 38
1/6   30/20/25/-1/0.05/1.7/072/13           20 W   AERO 20 W   RMY N/A
1/7   22/14/18/-8/0.74/9.5/000/00           32 NNW AERO 39 NNW RMY 38
1/8   20/06/13/-13/0.01/T/512/92            26 NNW AERO 29 NNW RMY N/A
1/9   17/04/11/-15/0.00/0.0/335/60          23 SSW AERO 23 SSW RMY 25
1/10  41/14/28/+3/0.18/0.0/369/66           35 SE  AERO 37 SE  RMY N/A
1/11  53/40/47/+22/0.13/0.0/358/64          51 SSW AERO 48 SSW RMY 57
1/12  59/42/51/+26/0.15/0.0/118/21          37 SSW AERO 40 S   RMY 40
1/13  55/23/39/+14/0.00/0.0/535/95          39 WNW AERO 43 WNW RMY 42
1/14  30/14/22/-3/0.00/0.0/339/60           20 SSW AERO 20 SSW RMY 22
1/15  35/23/29/+4/0.00/0.0/555/98           28 NW  AERO 28 NW  RMY 28 
1/16  40/22/31/+6/0.00/0.0/540/95           28 SW  AERO 25 SW  RMY 27
1/17  40/29/35/+10/0.27/T/257/45            23 E   AERO 23 E   RMY 25
1/18  38/31/30/+10/0.29/T/000/00            30 ENE AERO 29 ENE RMY 26
1/19  44/30/37/+12/T/T/379/66               21 NNW AERO 20 NNW RMY 20
1/20  40/30/35/+10/T/0.0/000/00             17 NNW AERO 17 NNW RMY N/A
1/21  54/35/45/+20/T/0.0/133/23             29 W   AERO 29 W   RMY 28
1/22  46/36/41/+16/0.14/T/023/04            31 ENE AERO 30 ENE RMY N/A
1/23  36/33/35/+10/0.48/0.3/000/00          56 NE  AERO 58 NE  RMY N/A
1/24  40/32/36/+11/1.48/0.0/000/00          62 NE  AERO 60 NE  RMY 60
1/25  42/32/37/+12/0.03/0.0/486/83          41 WNW AERO 40 WNW RMY 38
1/26  48/36/42/+17/0.10/0.0/024/04          40 W   AERO 44 W   RMY 41
1/27  42/33/38/+13/T/T/212/36               46 W   AERO 46 W   RMY 50
1/28  38/29/34/+9/0.00/0.0/249/42           36 WNW AERO 40 WNW RMY 43
1/29  39/28/34/+9/0.00/0.0/143/24           29 WSW AERO 29 WSW RMY 32
1/30  34/20/27/+1/0.00/0.0/185/31           30 WNW*AERO 31 WNW RMY 31
1/31  28/15/22/-4/0.11/1.5/198/33           29 WNW AERO 30 WNW RMY N/A

DAILY RECORDS FOR JANUARY 2017

1/12/17: NEW DAILY RECORD HIGH MAXIMUM TEMP. OF 59F,
         PREVIOUS RECORD WAS 57F SET 1913 AND TIED IN 1975
1/12/17: NEW DAILY RECORD HIGH MINIMUM TEMP. OF 42F,
         PREVIOUS RECORD WAS 40F SET 2006

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
M:    Missing data

2/1   40/23/32/+6/0.03/0.4/.../..           43 W   AERO 44 W   RMY 47
2/2   38/25/32/+6/T/T/.../..                36 WNW AERO 37 WNW RMY 36

2/3  Low temp since midnight is 19F; normal low is now 17F


DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 3
HIGH 58F IN 1991
LOW -7F IN 1955
PRECIP 2.14 INS. IN 1970
SNOWFALL 7.0 INS. IN 1913
PEAK GUST 102 MPH S IN 1970 [RECORD FOR MONTH]

RECORDS FOR FEBRUARY 4
HIGH 63F IN 1991
LOW -4F IN 1886, 1908
PRECIP 1.80 INS. IN 1926
SNOWFALL 15.0 INS. IN 1961
PEAK GUST 89 MPH SSE IN 1972

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle and Kaitlin Geagan