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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, DECEMBER 29, 2016  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MOSTLY CLOUDY SKIES BRINGS LIGHT SNOW IN EARLY AFTERNOON

Skies today were mostly cloudy with small breaks only seen in the early 
morning. Light snow began to fall at Blue Hill just before noon, but it was 
still melting as it hit the ground by the 1:00 P.M. EST observation. Only a 
trace of precipitation was measured. Visibility decreased from 60-70 miles 
in the morning to 8 miles as the snow began to fall. Temperatures earlier this 
morning were around 30F, but they rose just above freezing in the early afternoon. 
Pressure fell rapidly as the storm moved closer to Blue Hill.

7 A.M.
Weather: Few stratocumulus NNW-E, broken altostratus, few altocumulus in all 
directions, broken cirrus
Temperature: 30F; Dew Point: 28F; Wind: SE at 10 kts
Sea-level pressure: 30.05 ins. Hg, falling steadily
Visibility: 60 miles
6-hr Max temp: 30F
6-hr Min temp: 28F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 E200 BKN 250 BKN 60 176/30/18/1410/005/ FEW SC NNW-E FEW AC ALQDS/ 
8/572 57019 10030 20028

10 A.M.
Weather: Broken stratus, overcast altostratus
Temperature: 32F; Dew Point: 22F; Wind: ESE at 11G15 kts
Sea-level pressure: 29.98 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant fog SE-N
BHO SA 1455 E36 BKN 200 OVC 70 151/32/22/1211G15/998/ DSNT FG SE-N/ 8/62/ 58025 

1 P.M.
Weather: Overcast stratus, light snow
Temperature: 35F; Dew Point: 34F; Wind: ESE at 16G23 kts,
Sea-level pressure: 29.76 ins. Hg, falling, then more rapidly
Visibility: 8 miles
6-hr Max temp: 35F
6-hr Min temp: 30F
6-hr precip: Trace
BHO SA 1755 E30 OVC 8S- 079/35/34/1116G23/976/ PRESFR/ 8/6// 58072 MANUAL 6000/ 
10035 20030


SUMMARY FOR WEDNESDAY, DECEMBER 28, 2016
 
TEMPERATURE (DEGREES F)
MAX.....40   NORMAL.....36
MIN.....29   NORMAL.....20
MEAN....35   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL........................+7
TOTAL DEPARTURE FOR THE MONTH.......................+22 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............30   DEPARTURE..........-7
TOTAL HEATING UNITS FOR THE MONTH.............905   DEPARTURE.........-25
TOTAL HEATING UNITS FOR THE SEASON...........1935   DEPARTURE........-256
TOTAL HEATING UNITS LAST SEASON TO DATE......1525   DIFFERENCE.......+376

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................31 W   AT 11:07 A.M.
                   ASOS........................31 WNW AT 11:08 A.M.
                   DAVIS.......................30 SSW AT  9:42 A.M. RMY 26
FASTEST MILE FOR YESTERDAY.....................21 W   AT 11:08 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................21 NW  AT 11:44 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................20 W   AT 11:44 A.M.
AVERAGE WIND SPEED AND DIRECTION.............10.2 WNW
                   ASOS.......................9.9
                   DAVIS......................8.8 W [270 Deg.]

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..........1.90  DEPARTURE......-2.57
                         ASOS..............2.15
TOTAL PRECIPITATION FOR THE YEAR..........38.87  DEPARTURE.....-14.13
                         ASOS.............39.58

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.6
TOTAL SNOWFALL FOR THE MONTH................6.0  DEPARTURE.......-5.8
TOTAL SNOWFALL FOR THE SEASON...............6.0  DEPARTURE.......-8.4


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/+4/0.00/0.0/427/78           25 WSW AERO 25 W   RMY 27
12/14 40/26/33/+1/0.00/0.0/530/97           30 WNW AERO 31 WNW RMY N/A
12/15 29/13/21/-11/T/T/420/77               50 W   AERO 62 W   RMY 56
12/16 18/01/10/-21/0.00/0.0/485/89          39 WNW AERO 51 WNW RMY N/A
12/17 36/18/27/-4/0.60/4.3/000/00           25 SSW AERO 28 SSW RMY N/A
12/18 55/30/43/+12/0.05/0.0/000/00          47 WSW AERO 53 S   RMY 53
12/19 30/17/24/-6/0.00/0.0/273/50           26 WNW*AERO 28 NW  RMY 26
12/20 32/13/23/-7/0.00/0.0/359/66           28 SSE AERO 29 SSW RMY N/A
12/21 40/25/33/+3/0.00/0.0/354/65           28 SSE AERO 28 SSW RMY 30
12/22 38/29/34/+5/T/T/033/06                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 56/35/46/+18/..../0.0/.../..          51 SW  AERO 55 SW  RMY N/A
12/28 40/29/35/+7/0.00/0.0/.../..           31 W   AERO 32 W   RMY 26

12/29 Low temp since midnight is 28F; 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 29
HIGH 72 IN 1984
LOW -19 IN 1933 (RECORD FOR DECEMBER)
PRECIP 1.91 INS. IN 1945
SNOWFALL 18.4 INS. IN 1945
PEAK GUST 95 MPH S IN 1966 (RECORD FOR DECEMBER)

RECORDS FOR DECEMBER 30
HIGH 60 IN 1984
LOW -18 IN 1933
PRECIP 1.48 INS. IN 1891
SNOWFALL 7.5 INS. IN 1956
PEAK GUST 81 MPH WNW IN 1962

TODAY'S REPORT PREPARED BY: Lizzy Suzedell