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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 29, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT SNOW IN THE MORNING AND AFTERNOON
ATOP GREAT BLUE HILL.... 

Northeasterly winds have remained at or below 
10 mph from the northwest for the majority of 
the day. Light snowfall this morning left only 
a trace on the ground, but has started again 
shortly following the 1 P.M. observation. 
Visibility remained below 40 miles, due to a 
distant fog. The high temperature so far today 
is 26F, 8 degrees below the daily normal of 34F. 
The low since midnight is 19F, which is 2 degrees 
above the daily normal minimum of 17F. 


Today's Observations:

7 A.M.
Weather: Overcast nimbostratus, light snow
Temperature: 20F; Dew Point: 15F; Wind: NNE at 7 kts
Sea-level pressure: 30.11 ins. Hg, rising steadily
Visibility: 30 miles, distant fog
6-hr Max temp: 24F
6-hr Min temp: 19F
24-hr Precip: Trace
24-hr snowfall: Trace
Snow depth: Trace 
BHO SA 1155 E65 OVC 30 198/20/15/0207/011/ DSNT FG ALQDS/ 
8/02/ 53017 10024 20019 

10 A.M.
Weather: Overcast altostratus 
Temperature: 22F; Dew Point: 19F; Wind: NNE at 7 kts
Sea-level pressure: 30.11 ins. Hg, rising then falling
Visibility: 35 miles, distant fog
3-hr Precip: Trace
BHO SA 1455 E65 OVC 35 197/22/19/0307/011/ DSNT FG ALQDS/ 
8/01/ 600// 58001

1 P.M.
Weather: Overcast altostratus
Temperature: 26F; Dew Point: 22F; Wind: NNE at 7 kts
Sea-level pressure: 30.04 ins. Hg, falling steadily
Visibility: 40 miles, distant fog
6-hr Max temp: 26F
6-hr Min temp: 19F
6-hr Precip: Trace
6-hr snowfall: Trace 
Snow depth: Trace
BHO SA 1755 E65 OVC 40 174/26/22/0307/004/ DSNT FG ALQDS/ 
8/01/ 600// 56023 10026 20019

SUMMARY FOR MONDAY, JANUARY 28, 2019 

TEMPERATURE (DEGREES F)
MAX.....30   NORMAL.....34
MIN.....19   NORMAL.....17
MEAN....28   NORMAL.....25

DEPARTURE FROM 30-YEAR NORMAL........................+3
TOTAL DEPARTURE FOR THE MONTH.......................+52 [+1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............37   DEPARTURE.........-3
TOTAL HEATING UNITS FOR THE MONTH............1057   DEPARTURE........-51
TOTAL HEATING UNITS FOR THE SEASON...........3353   DEPARTURE........-59
TOTAL HEATING UNITS LAST SEASON TO DATE......3201   DIFFERENCE......+152

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................28 NW  AT 1:23 A.M.
                   AERO.........................28 NW  AT 1:21 A.M.
                   ASOS.........................28 NW  AT 1:23 A.M. 
                   DAVIS........................29 NW  AT 1:23 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................21 NW  AT 1:24 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................21 NW  AT 1:23 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................21 NW  AT 1:23 A.M.
AVERAGE WIND SPEED AND DIRECTION...............9.0 N
                   ASOS........................9.2
                   DAVIS.......................9.2 NNW [346 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........5.10  DEPARTURE.......+1.16
                         ASOS..............5.25
TOTAL PRECIPITATION FOR THE YEAR...........5.10  DEPARTURE.......+1.16
                         ASOS..............5.25

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.5
TOTAL SNOWFALL FOR THE MONTH................4.2  DEPARTURE.......-11.3
TOTAL SNOWFALL FOR THE SEASON..............11.9  DEPARTURE.......-19.6

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01 54/29/42/+15/..../0.0/386/72         53 W   AERO 53 W   RMY 54
01/02 34/24/29/+2/..../.../432/81          22 NW  AERO 22 NW  RMY N/A
01/03 42/28/35/+9/0.01/T/228/43            28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/..../.../354/66         29 SW  AERO 29 SW  RMY 29
01/05 41/32/37/+11/1.19/000/000/00         26 NE  AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/300/56          42 NW  AERO 46 NW  RMY 50
01/07 26/14/20/-6/.../.../474/88           37 NW  AERO 41 NW  RMY N/A
01/08 40/24/32/+6/.../.../000/00           24 SSE AERO 23 SSE RMY N/A
01/09 42/31/37/+11/.../.../084/16          44 W   AERO 46 WNW RMY 45
01/10 32/20/26/+1/T/T/090/17               37 NW  AERO 41 NW  RMY 43
01/11 26/12/19/-6/0.00/0.0/366/68          36 WNW AERO 37 WNW RMY 38
01/12 26/9/18/-7/0.00/0.0/486/89           32 NW  AERO 32 NW  RMY 29
01/13 25/11/18/-7/0.00/0.0/456/84          18 NNW AERO 16 NW  RMY N/A
01/14 27/20/24/-1/0.00/0.0/120/22          20 NNE AERO 17 N   RMY N/A
01/15 34/18/26/1/0.00/0.0/402/73           22 NW  AERO 21 NNW RMY N/A
01/16 34/23/29/+4/0.00/0.0/270/47          33 W   AERO 32 W   RMY 35
01/17 27/13/20/-5/0.00/0.0/480/87          30 NNW AERO 28 NW  RMY N/A
01/18 40/21/31/+6/0.00/0.0/156/28          18 WNW AERO 18 WNW RMY N/A 
01/19 31/24/28/+3/.../1.6/198/36           30 E   AERO 30 E   RMY N/A
01/20 33/3/18/-7/.../.../000/00            39 ENE AERO 43 ENE RMY 39
01/21 3/-2/1/-24/0.00/0.0/348/62           32*WNW AERO 41 WNW RMY M
01/22 24/0/12/-13/0.00/0.0/.../..          28 NW  AERO 30 NW  RMY 29
01/23 46/15/31/+6/0.00/0.0/.../..          37 SSW AERO 39 SSW RMY N/A
01/24 57/31/44/+19/1.44/0.0/.../..         77 S   AERO 79 S   RMY N/A
01/25 37/23/30/+5/0.00/0.0/.../..          41 WNW AERO 46 WNW RMY N/A
01/26 33/17/25/0/0.00/0.0/.../..           25 W   AERO 25 W   RMY 27        
01/27 44/24/34/+9/0.00/0.0/.../..          39 S   AERO 39 S   RMY 41
01/28 30/19/28/+3/..../.../.../..          28 NW  AERO 28 NW  RMY N/A

01/29 Low temp since midnight is 19F; normal low is 17F

*Official gust chart reading low 

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

RECORDS FOR JANUARY 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973

RECORDS FOR JANUARY 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962

TODAY'S REPORT PREPARED BY: Benjamin Turner