BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 22, 2017 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MOSTLY CLOUDY SKIES WITH STABLE TEMPERATURES
 
This morning had mostly cloudy skies, and patchy fog conditions made the
visibility drop rapidly after the morning observation.
The temperature was 44F with a dew point of 41F. Temperatures actually
dropped some during the day with winds out of the north, dropping to 42
by the 1 o'clock observation. 
 
 
Today's Observations:
 
7 A.M.
Weather: Broken altocumulus and altostratus
Temperature: 44F; Dew Point: 41F; Wind: N at 7 kts
Sea-level pressure: 29.77 ins. Hg, rising then faster
Visibility: 50 miles,
6-hr Max temp: 44F
6-hr Min temp: 42F
24-hr precip: 0.00 in
24-hr snowfall: 0.00 in.
BHO SA 1155 E80 BKN 50 082/44/41/0107/977/ PTCHY FOG UNDCST/
8/07/ 53012 10044 20042
 
10 A.M.
Weather: Overcast altocumulus, thin spot and breaks in overcast,
few cumulus NW-NNE in all directions
Temperature: 44F; Dew Point: 40F; Wind: ENE at 12 kts
Sea-level pressure: 29.80 ins. Hg, rising then slower
Visibility: 30 miles, distant fog in all directions
BHO SA 1455 E90 -OVC 30 091/44/40/0612/980/ FEW CU NW-NNE DSNT FOG/
8/17/ 51009
 
1 P.M.
Weather: Overcast Stratus
Temperature: 44F; Dew Point: 42F; Wind: ENE at 9 kts
Sea-level pressure: 29.81 ins. Hg, rising, then more quickly
Visibility: 20 miles, except 40 SSE-SW, distant fog in all directions
6-hr Max temp: 44F
6-hr Min temp: 42F
BHO SA 1755 E110 OVC 30 094/44/42/0609/981/ VSBY 40 SSE-SW DSNT FG/
8/07/ 53003 10044 20042
 
 
SUMMARY FOR SATURDAY, JANUARY 21, 2017

TEMPERATURE (DEGREES F)
MAX.....54   NORMAL.....34
MIN.....35   NORMAL.....17
MEAN....45   NORMAL.....25
 
DEPARTURE FROM 30-YEAR NORMAL.......................+20
TOTAL DEPARTURE FOR THE MONTH......................+138 [+5.9 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............20   DEPARTURE.........-20
TOTAL HEATING UNITS FOR THE MONTH.............691   DEPARTURE........-137
TOTAL HEATING UNITS FOR THE SEASON...........2723   DEPARTURE........-410
TOTAL HEATING UNITS LAST SEASON TO DATE......2411   DIFFERENCE.......+312
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................29 W   AT 3:10 P.M.
                   ASOS........................28 W   AT 3:11 P.M.
                   DAVIS.......................27 WNW AT 3:08 P.M.RMY 28
FASTEST MILE FOR YESTERDAY.....................21 W   AT 3:11 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................21 W   AT 3:25 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................21 WNW AT 3:20 P.M.
AVERAGE WIND SPEED AND DIRECTION..............9.8 WSW 
                   ASOS.......................9.5
                   DAVIS......................8.6 W [265 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.16  DEPARTURE......+0.18
                         ASOS..............3.46
TOTAL PRECIPITATION FOR THE YEAR...........3.16  DEPARTURE......+0.18
                         ASOS..............3.46
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH...............11.2  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE SEASON..............19.0  DEPARTURE.......-8.3
 
 
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/.../..           35 SE  AERO 37 SE  RMY N/A
1/11  53/40/47/+22/0.13/0.0/.../..          51 SSW AERO 48 SSW RMY 57
1/12  59/42/51/+26/0.15/0.0/.../..          37 SSW AERO 40 S   RMY 40
1/13  55/23/39/+14/0.00/0.0/.../..          39 WNW AERO 43 WNW RMY 42
1/14  30/14/22/-3/0.00/0.0/.../..           20 SSW AERO 20 SSW RMY 22
1/15  35/23/29/+4/0.00/0.0/.../..           28 NW  AERO 28 NW  RMY 28
1/16  40/22/31/+6/0.00/0.0/.../..           28 SW  AERO 25 SW  RMY 27
1/17  40/29/35/+10/..../T/.../..            23 E   AERO 23 E   RMY 25
1/18  38/31/30/+10/..../T/.../..            30 ENE AERO 29 ENE RMY 26
1/19  44/30/37/+12/..../T/.../..            21 NNW AERO 20 NNW RMY 20
1/20  40/30/35/+10/..../0.0/.../..          17 NNW AERO 17 NNW RMY N/A
1/21  54/35/45/+20/0.00/0.0/.../..          29 W   AERO 29 W   RMY 28
 
1/22 Low temp since midnight is 42F; normal low is now 17F
 
 
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
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 22
HIGH 59F IN 1916
LOW -8F IN 1888,1976
PRECIP 1.24 INS. IN 1891,1987
SNOWFALL 10.0 INS. IN 2005
PEAK GUST 67 MPH W IN 1976
 
RECORDS FOR JANUARY 23
HIGH 62F IN 1906
LOW -10F IN 1976
PRECIP 2.40 INS. IN 1935
SNOWFALL 14.6 INS. IN 1966
PEAK GUST 85 MPH S IN 1992
 
TODAY'S REPORT PREPARED BY: Robert Millette