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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, DECEMBER 27, 2016  
ALL TIMES ARE IN EASTERN STANDARD TIME

WINDY, VERY WARM TEMPERATURES WITH MOSTLY CLOUDY SKIES

The low pressure system that came to Blue Hill today left us with 0.02 ins. 
of rain early on and very blustery, warm conditions. Winds were out of the 
SW and the peak gust so far for the day was 51 mph at 5:37 A.M. EST. 
Temperatures yesterday continued to warm overnight and a high of 56F was 
reached just before the 7:00 A.M. observation. The record for today's high 
is 57F, set in 1895 and 1949, but today's max is not expected to break the 
record as temperatures have begun to slowly decrease.

7 A.M.
Weather: Overcast stratus
Temperature: 54F; Dew Point: 51F; Wind: SW at 23G30 kts,
Peak Wind: 40 mph SW at 6:40 A.M. EST
Sea-level pressure: 29.73 ins. Hg, falling, then steady
Visibility: 20 miles
6-hr Max temp: 56F
6-hr Min temp: 46F
24-hr precip: 0.02 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 E13 OVC 20 067/54/51/2223G30/973/ PK WND 2240/35/ 8/6// 56028 
MANUAL 70002 ASOS 70007 10056 20046

10 A.M.
Weather: Overcast stratus, thin spots in overcast in all directions
Temperature: 55F; Dew Point: 49F; Wind: SW at 20G33 kts,
Peak Wind: 33 mph SW at 9:52 A.M. EST
Sea-level pressure: 29.72 ins. Hg, falling, then more slowly
Visibility: 25 miles
BHO SA 1455 E15 OVC 25 064/55/49/2320G33/972/ THN SPTS IOVC ALQDS PK WND 
2333/52/ 8/6// 58003 ASOS 60001

1 P.M.
Weather: Broken stratocumulus, few altostratus in all directions, few cirrus 
in all directions
Temperature: 55F; Dew Point: 49F; Wind: W at 21G29 kts,
Peak Wind: 30 mph W at 12:36 P.M. EST
Sea-level pressure: 29.66 ins. Hg, falling, then less quickly
Visibility: 70 miles
6-hr Max temp: 56F
6-hr Min temp: 53F
BHO SA 1755 E22 BKN 70 045/55/42/2621G29/966/ FEW AS ALQDS FEW CI ALQDS PK 
WND 2630/36/ 8/511 56019 ASOS 60001 10056 20053

SUMMARY FOR MONDAY, DECEMBER 26, 2016
 
TEMPERATURE (DEGREES F)
MAX.....46   NORMAL.....36
MIN.....20   NORMAL.....20
MEAN....33   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL........................+5
TOTAL DEPARTURE FOR THE MONTH........................-3 [-0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............32   DEPARTURE..........-5
TOTAL HEATING UNITS FOR THE MONTH.............856   DEPARTURE..........+1
TOTAL HEATING UNITS FOR THE SEASON...........1886   DEPARTURE........-231
TOTAL HEATING UNITS LAST SEASON TO DATE......1504   DIFFERENCE.......+382

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................39 S   AT 11:26 P.M.
                   ASOS........................41 S   AT 11:25 P.M.
                   DAVIS.......................40 S   AT 11:24 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................37 S   AT 10:52 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................32 S   AT 10:52 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................31 SSW AT 10:52 P.M.
AVERAGE WIND SPEED AND DIRECTION.............12.3 SSE
                   ASOS......................12.9
                   DAVIS.....................11.3 S [180 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE......-0.14
                         ASOS..............0.07
TOTAL PRECIPITATION FOR THE MONTH..........1.90  DEPARTURE......-2.28
                         ASOS..............2.14
TOTAL PRECIPITATION FOR THE YEAR..........38.87  DEPARTURE.....-13.84
                         ASOS.............39.57

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.......-4.7
TOTAL SNOWFALL FOR THE SEASON...............6.0  DEPARTURE.......-7.3


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 46/20/33/5/..../0.0/.../..            39 S   AERO 40 S   RMY N/A

12/27 Low temp since midnight is 46F; normal low is now 20F


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

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

RECORDS FOR DECEMBER 28
HIGH 60 IN 1982
LOW -2 IN 1933
PRECIP 2.16 INS. IN 1967
SNOWFALL 9.5 INS. IN 1967
PEAK GUST 89 MPH SSE IN 1983

TODAY'S REPORT PREPARED BY: Lizzy Suzedell