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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 18, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY DAY WITH SNOW AND FAIRLY LIGHT WIND....

In contrast to yesterday's good visibility and clear skies,
today has been foggy with no breaks for sun between 7 A.M.
and 1 P.M. 4.0 inches of snow fell since last night through
this morning, bringing our monthly total closer to normal.
However, our seasonal snowfall still remains very low with
a departure of -22.2 inches from our normal seasonal snowfall
amount. Our high temperature so far today has been 30F, 7 
degrees below our normal high temperature of 37F. Wind speeds
have remained light under 10 knots through the entire day so far. 


Today's Observations:

7 A.M.
Weather: Light snow and fog, overcast nimbostratus
Temperature: 26F; Dew Point: 26F; Wind: ENE at 6 kts
Sea-level pressure: 29.89 ins. Hg, decreasing, then more slowly
Visibility: 3/4 mile, fog
6-hr Max temp: 26F
6-hr Min temp: 25F
24-hr Precip: 0.36 ins.
24-hr snowfall: 4.0 ins
Snow depth: 4 ins. 
BHO SA 1155 -X E30 OVC 3/4S-F 123/26/26/0706/989/ F3 S-CTD/  
8/6// 4/004 56022 60/// 70036 10026 20025

10 A.M.
Weather: Light snow and fog , overcast nimbostratus
Temperature: 29F; Dew Point: 29F; Wind: NNE at 9 kts,
Sea-level pressure: 30.13 ins. Hg, falling, then more slowly
Visibility: 3/4 mile, fog
3-hr Precip: 0.01 ins. 
BHO SA 1455 -X E25 OVC 3/4S-F 110/29/29/0309/985/ F3 S-CTD/ 
8/6// 56013 6001/ 

1 P.M.
Weather: Light snow and fog, overcast nimbostratus
Temperature: 30F; Dew Point: 30F; Wind: NNW at 7 kts
Sea-level pressure: 29.83 ins. Hg, falling then rising
Visibility: 3/4 miles, fog
6-hr Max temp: 30F
6-hr Min temp: 26F
6-hr Precip:  0.02 ins.
6-hr snowfall: 0.6 ins.
Snow depth: 5 inches 
BHO SA 1755 -X E5 OVC 3/4S-F 101/30/30/3407/983/ F3 S-CTD/ 
8/6// 4/005 55009 6002/ 10030 20026


SUMMARY FOR SUNDAY, FEBRUARY 17, 2019 

TEMPERATURE (DEGREES F)
MAX.....37   NORMAL.....37
MIN.....19   NORMAL.....20
MEAN....28   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL.........................0
TOTAL DEPARTURE FOR THE MONTH.......................+81 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............37   DEPARTURE..........0
TOTAL HEATING UNITS FOR THE MONTH.............566   DEPARTURE........-82
TOTAL HEATING UNITS FOR THE SEASON...........4062   DEPARTURE.......-116
TOTAL HEATING UNITS LAST SEASON TO DATE......3887   DIFFERENCE......+175

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 NNW AT  2:14 A.M.
                   AERO.........................25 NNW AT  2:11 A.M.
                   ASOS.........................29 NNW AT  2:13 A.M. 
                   DAVIS........................29 W   AT  1:11 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................20 NNW AT  1:30 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................21 NW  AT  1:30 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 WNW AT  1:29 A.M.
AVERAGE WIND SPEED AND DIRECTION..............8.7 NNW
                   ASOS.......................8.5
                   DAVIS......................9.1 W [271 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.36  DEPARTURE.......+0.21
                         ASOS..............0.37
TOTAL PRECIPITATION FOR THE MONTH..........2.40  DEPARTURE.......+0.04
                         ASOS..............2.40
TOTAL PRECIPITATION FOR THE YEAR...........7.75  DEPARTURE.......+1.04
                         ASOS..............7.88

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........4.0  DEPARTURE........+3.5
TOTAL SNOWFALL FOR THE MONTH................6.9  DEPARTURE........-1.5
TOTAL SNOWFALL FOR THE SEASON..............19.3  DEPARTURE.......-22.2


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

02/01 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31
02/03 38/27/26/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/..../.../396/67          24 NNW AERO 23 NNW RMY N/A
02/07 37/31/34/+7/..../.../000/00          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/..../.../204/34         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/..../2.8/000/00          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/..../0.1/018/03          36 W   AERO 32 W   RMY 36
02/14 37/26/32/+4/0.00/0.0/.../..          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/.../..         40 S   AERO 40 S   RMY 44
02/16 44/26/35/+7/0.00/0.0/.../..          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/..../4.0/.../..           30 NNW AERO 25 NNW RMY N/A

02/17 Low temp since midnight is 25F; normal low is 20F
 

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

RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008

RECORDS FOR FEBRUARY 19
HIGH 66F IN 1981
LOW -5F IN 1923
PRECIP 2.73 INCHES IN 1972
SNOWFALL 12.0 INCHES IN 1893
PEAK GUST 76 MPH ENE IN 1972

TODAY'S REPORT PREPARED BY: Samantha Richard