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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, DECEMBER 26, 2016  
ALL TIMES ARE IN EASTERN STANDARD TIME

COOLER, CALMER AIR AND PARTLY CLOUDY SKIES

Today was colder than yesterday with a low of 20F this morning. Temperatures 
warmed to 38F by the 1:00PM EST observation. Winds remained light with speeds 
around 6 mph. The peak gust for the day so far has been 16 mph at 12:27 out 
of the SE. The winds were out of the NE in the morning, but they shifted to 
the SSE around noon as the pressure began to fall. The sun has been visible 
all day, but scattered stratocumulus and cirrus remained in the sky.

The highest pressure of the year occurred early this morning around 3:30AM. The 
sea-level pressure was 30.78 ins. Hg. The highest before this was 30.88 ins. Hg 
on November 25, 2015 at 11:25PM.

7 A.M.
Weather: Few cumulus NE-SE, scattered altocumulus, few cirrus in all directions
Temperature: 21F; Dew Point: 9F; Wind: N at 7 kts
Sea-level pressure: 30.77 ins. Hg, falling, then rising
Visibility: 70 miles, distant fog in all directions
6-hr Max temp: 24F
6-hr Min temp: 20F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 200 SCT 70 421/21/09/0107/077/ FEW CU NE-SE FEW CI ALQDS DSNT 
FG ALQDS/ 8/181 55000 10024 20020

10 A.M.
Weather: Scattered stratocumulus, few altocumuls SE-S, thin broken cirrus
Temperature: 31F; Dew Point: 20F; Wind: NE at 4 kts
Wind Speed: Light
Sea-level pressure: 30.78 ins. Hg, rising slightly, then steady
Visibility: 70 miles, distant fog in all directions
BHO SA 1455 54 SCT E250 -BKN 70 422/31/20/0404/078/ FEW AC SE-S DSNT FG 
ALQDS WND LGT/ 8/531 53001

1 P.M.
Weather: Few cumulus in all directions, scattered stratocumulus, few 
altocumulus in all directions, scattered cirrus
Temperature: 38F; Dew Point: 23F; Wind: S at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.66 ins. Hg, rising, then more quickly
Visibility: 40 miles, distant fog in all directions
6-hr Max temp: 38F
6-hr Min temp: 20F
BHO SA 1755 19 SCT 250 SCT 40 381/38/23/1905/066/ FEW CU ALQDS FEW AC W-NW 
DSNT FG ALQDS WND LGT/ 8/531 56041 10038 20020


SUMMARY FOR SUNDAY, DECEMBER 25, 2016
 
TEMPERATURE (DEGREES F)
MAX.....43   NORMAL.....36
MIN.....25   NORMAL.....20
MEAN....34   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL........................+6
TOTAL DEPARTURE FOR THE MONTH........................-8 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............31   DEPARTURE..........-6
TOTAL HEATING UNITS FOR THE MONTH.............824   DEPARTURE..........+6
TOTAL HEATING UNITS FOR THE SEASON...........1854   DEPARTURE........-226
TOTAL HEATING UNITS LAST SEASON TO DATE......1486   DIFFERENCE.......+368

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................35 NW  AT 12:44 P.M.
                   ASOS........................37 NNW AT 12:45 P.M.
                   DAVIS.......................35 W   AT 12:45 P.M. RMY 36
FASTEST MILE FOR YESTERDAY.....................23 NW  AT 11:11 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................24 NNW AT 12:46 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................23 W   AT 12:45 P.M.
AVERAGE WIND SPEED AND DIRECTION.............13.1 NW
                   ASOS......................13.1
                   DAVIS.....................11.5 WSW [240 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.88  DEPARTURE......-2.14
                         ASOS..............2.07
TOTAL PRECIPITATION FOR THE YEAR..........38.85  DEPARTURE.....-13.70
                         ASOS.............39.50

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH................6.0  DEPARTURE.......-4.2
TOTAL SNOWFALL FOR THE SEASON...............6.0  DEPARTURE.......-6.8


PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/1  55/39/47/+10/0.20/0.0/385/69          36 W   AERO 37 W   RMY 36
12/2  48/34/41/+5/0.00/0.0/535/96           32 W   AERO 32 W   RMY N/A
13/3  44/31/38/+2/0.00/0.0/445/80           37 WNW AERO 39 WNW RMY 40
12/4  39/27/33/-2/0.00/0.0/355/64           25 NW  AERO 25 NW  RMY N/A
12/5  36/27/32/-3/0.13/0.4/000/00           26 W   AERO 25 W   RMY 29
12/6  42/30/36/+1/0.00/0.0/392/71           22 W   AERO 21 W   RMY N/A
12/7  39/34/37/+3/0.10/0.0/000/00           21 E   AERO 21 E   RMY N/A
12/8  40/29/35/+1/0.00/0.0/033/06           30 W   AERO 31 W   RMY 33
12/9  35/21/28/-6/0.00/0.0/549/100          35 W   AERO 36 WNW RMY 34
12/10 27/17/22/-11/0.00/0.0/544/99          26 WNW AERO 27 WNW RMY 29 
12/11 33/16/25/-8/0.06/0.4/411/75           17 SSW AERO 15 SW  RMY N/A
12/12 41/27/34/+1/0.35/0.9/038/07           29 ESE AERO 29 SE  RMY 30
12/13 41/30/36/+4/0.00/0.0/.../..           25 WSW AERO 25 W   RMY 27
12/14 40/26/33/+1/0.00/0.0/.../..           30 WNW AERO 31 WNW RMY N/A
12/15 29/13/21/-11/T/T/.../..               50 W   AERO 62 W   RMY 56
12/16 18/01/10/-21/0.00/0.0/.../..          39 WNW AERO 51 WNW RMY N/A
12/17 36/18/27/-4/0.60/4.3/.../..           25 SSW AERO 28 SSW RMY N/A
12/18 55/30/43/+12/0.05/0.0/.../..          47 WSW AERO 53 S   RMY 53
12/19 30/17/24/-6/0.00/0.0/.../..           26 WNW*AERO 28 NW  RMY 26
12/20 32/13/23/-7/0.00/0.0/.../..           28 SSE AERO 29 SSW RMY N/A
12/21 40/25/33/+3/0.00/0.0/.../..           28 SSE AERO 28 SSW RMY 30
12/22 38/29/34/+5/T/T/.../..                28 SSE AERO 29 S   RMY 30
12/23 44/29/37/+8/0.00/0.0/.../..           25 WNW AERO 25 WNW RMY N/A
12/24 41/34/38/+9/0.39/0.0/.../..           30 SSW AERO 31 SSW RMY 30
12/25 43/25/34/+6/0.00/0.0/.../..           35 NW  AERO 37 NW  RMY 36

12/26 Low temp since midnight is 20F; normal low is now 25F


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

RECORDS FOR DECEMBER 26
HIGH 58 IN 1973,1982
LOW -12 IN 1980
PRECIP 3.64 INS. IN 1969
SNOWFALL 17.5 INS. IN 1909
PEAK GUST 84 MPH SSE IN 1957

RECORDS FOR DECEMBER 27
HIGH 57 IN 1895,1949
LOW -4 IN 1903
PRECIP 2.43 INS. IN 1969
SNOWFALL 11.2 INS. IN 1947
PEAK GUST 73 S IN 2011

TODAY'S REPORT PREPARED BY: Lizzy Suzedell