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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, FEBRUARY 11, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY MORNING SNOW AND COOL TEMPERATURES

2.9 inches of snow fell at Blue Hill this morning, ending shortly after 
7:00 A.M. EST. The temperature rose to 26F around 10:00 A.M., but it fell 
to 19F by the 1:00 P.M. observation. Skies remained covered by stratus 
clouds. Visibility was poor, especially in the later morning when it was 
just 2 miles because of fog. Pressure slowly fell throughout the day.

Today's Observations:

7 A.M.
Weather: Light snow, few stratus in all directions, overcast altostratus
Temperature: 20F; Dew Point: 20F; Wind: ESE at 14G16 kts
Sea-level pressure: 30.04 ins. Hg, falling, then less quickly 
Visibility: 10 miles 
6-hr Max temp: 20F
6-hr Min temp: 15F
24-hr precip: 0.14 in.
24-hr snowfall: 2.9 in.
BHO SA 1155 E15 OVC 10S- 173/20/20/1214G16/004/ FEW ST ALQDS NEW SNW PST 24 HRS 
2.9 INS/ 8/62/ 4/012 56015 MANUAL 70014 10020 20015

10 A.M.
Weather: Fog, overcast stratus
Temperature: 26F; Dew Point: 26F; Wind: E at 7 kts
Sea-level pressure: 29.99 ins. Hg, falling, then less quickly
Visibility: 2 miles, except 1/2 mile N-ENE
BHO SA 1455 E4 OVC 2F 159/26/26/0907/999/ NEW SNW PST 3 HRS TRACE VSBY N-ENE 
1/2/ 8/6// 4/012 56014

1 P.M.
Weather: Fog, overcast stratus
Temperature: 19F; Dew Point: 19F; Wind: NNW at 8 kts
Sea-level pressure: 29.93 ins. Hg, falling, then more quickly 
Visibility: 3 1/2 miles, except 1/2 N
6-hr Max temp: 26F
6-hr Min temp:  18F
BHO SA 1755 E3 OVC 3 1/2F 137/19/19/3308/993/ VSBY N 1/2/ 8/6// 4/012 58022 
10026 20018


SUMMARY FOR FRIDAY, FEBRUARY 10, 2017
 
TEMPERATURE (DEGREES F)
MAX.....24   NORMAL.....36
MIN......7   NORMAL.....18
MEAN....16   NORMAL.....27

DEPARTURE FROM 30-YEAR NORMAL.......................-11
TOTAL DEPARTURE FOR THE MONTH.......................+23 [+1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............49   DEPARTURE.........+11
TOTAL HEATING UNITS FOR THE MONTH.............363   DEPARTURE.........-24
TOTAL HEATING UNITS FOR THE SEASON...........3390   DEPARTURE........-528
TOTAL HEATING UNITS LAST SEASON TO DATE......3043   DIFFERENCE.......+347

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................43 WNW AT 10:12 A.M.
                   ASOS........................48 WNW AT  9:58 A.M.
                   DAVIS.......................45 NNW AT 10:09 A.M. RMY 48
FASTEST MILE FOR YESTERDAY.....................37 WNW AT  9:57 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................35 WNW AT 10:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................34 NNW AT 10:11 A.M.
AVERAGE WIND SPEED AND DIRECTION.............13.4 WNW
                   ASOS......................13.1
                   DAVIS.....................11.7 NW [320 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.14  DEPARTURE......+0.00
                         ASOS................NA
TOTAL PRECIPITATION FOR THE MONTH..........2.31  DEPARTURE......+0.96
                         ASOS................NA
TOTAL PRECIPITATION FOR THE YEAR...........7.81  DEPARTURE......+2.11
                         ASOS................NA

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........2.9  DEPARTURE.......+2.4
TOTAL SNOWFALL FOR THE MONTH...............20.9  DEPARTURE......+16.0
TOTAL SNOWFALL FOR THE SEASON..............41.7  DEPARTURE.......+3.7

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   30/19/25/-1/0.00/0.0/.../..           28 WNW AERO 29 WNW RMY 31
2/4   31/15/23/-3/0.00/0.0/.../..           31 WNW AERO 30 WNW RMY N/A
2/5   43/22/33/+7/0.00/0.0/.../..           38 SSW AERO 41 SSW RMY N/A
2/6   37/28/33/+7/0.00/0.0/.../..           41 WNW AERO 41 WNW RMY 43
2/7   37/30/34/+7/0.54/0.7/.../..           32 ENE AERO 31 ENE RMY 32
2/8   49/25/37/+10/T/0.0/.../..             25 W   AERO 25 W   RMY 31
2/9   35/8/22/-5/1.60/16.9/.../..           54 NNE AERO 53 NNE RMY 54
2/10  24/7/16/-11/.../.../.../..            43 WNW AERO 50 WNW RMY 48

2/11  Low temp since midnight is 15F; normal low is now 18F


DAILY RECORDS FOR FEBRUARY 2017

2/09/17: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.9 INS. 
         PREVIOUS RECORD WAS 14.0 INS. SET IN 2015 

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

RECORDS FOR FEBRUARY 11
HIGH 60F IN 1981
LOW -10F IN 1899
PRECIP 1.07 INCHES IN 1955
SNOWFALL 9.6 INCHES IN 1933
PEAK GUST 95 MPH S IN 1981

RECORDS FOR FEBRUARY 12
HIGH 56F IN 1999
LOW -14F IN 1914
PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH]
SNOWFALL 15.0 INCHES IN 2006
PEAK GUST 70 MPH E IN 1985

TODAY'S REPORT PREPARED BY: Lizzy Suzedell