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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 6, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

INCREASING CLOUDS AND WIND ATOP GREAT BLUE HILL....

We observed a decrease in visibility from 70 miles to
30 miles from 10 A.M. to 1 A.M. Sky conditions have 
become overcast following noontime, and a distant 
fog is being seen to the west. Wind has picked up 
since this morning, with the highest gust today 
being 33 mph.  
 
The high so far today is 63F, which is a degree 
below the normal high of 64F. The low this morning 
was 44F, which is 3 degrees below the daily normal 
minimum of 47F.

PRELIMINARY STATS FOR SEPTEMBER 2019

TEMPERATURE, Deg. F
Avg. Max. 73.6 [+2.0]
Avg. Min. 54.5 [-0.1]
Mean      64.1 [+1.0]
24-hour corrected mean: 63.4
Max. for month: 88F on the 23rd
Min. for month: 43F on the 19th

HEATING DEGREE DAYS
Total heating units:    81 [-36]
Total for the season:   93 [-49]
Total for last season:  87

COOLING DEGREE DAYS
Total cooling units:    58  [-2]
Total for the season:  680 [+83]
Total for last season: 863

PRECIPITATION, Inches
Total: 1.27 [-2.79]
Greatest in 24 hrs: 0.37 ins. on the 2nd 

WIND, mph
Avg. uncorrected wind speed: 10.3 mph
Avg. corrected wind speed:   10.9 mph
Prevailing wind direction:   SSW [11%]
Peak gust and direction:     39 W on the 2nd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today's Observations:

7 A.M.
Weather: Scattered altocumulus and cirrus, few cumulus
Temperature: 49F; Dew Point: 41F; Wind: SSE at 14 kts
Sea-level pressure: 30.38 ins. Hg, falling steadily 
Visibility: 50 miles
6-hr Max temp: 49F
6-hr Min temp: 44F
24-hr Precip: 0.00 ins.
BHO SA 1155 160 SCT 250 SCT 50 288/49/41/1614/038/ 
FEW CU ALQDS/ 8/172 58010 10049 20044

10 A.M.
Weather: Scattered cumulus, broken altocumulus and 
cirrus
Temperature: 60F; Dew Point: 47F; Wind: S at 15G22 kts
Sea-level pressure: 30.37 ins. Hg, falling steadily
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT E160 BKN 250 BKN 70 284/60/47/
1915G22/037/ 8/172 56004

1 P.M.
Weather: Overcast stratocumulus
Temperature: 60F; Dew Point: 51F; Wind: S at 14G23 kts,
Peak wind: 33 MPH (28 kts) S at 11:27 A.M.   
Sea-level pressure: 30.33 ins. Hg, falling steadily
Visibility: 30 miles, distant fog
6-hr Max temp: 63F
6-hr Min temp: 49F
6-hr Precip: 0.00 ins.
BHO SA 1755 E40 OVC 30 272/60/51/1914G23/033/ DSNT 
FG ALQDS PK WND 1828/1627/ 8/4// 57012 10063 20049  


SUMMARY FOR SATURDAY, OCTOBER 5, 2019 

TEMPERATURE (DEGREES F)
MAX.....58   NORMAL.....64
MIN.....35   NORMAL.....47
MEAN....47   NORMAL.....56

DEPARTURE FROM 30-YEAR NORMAL......................-9
TOTAL DEPARTURE FOR THE MONTH......................-14 [-3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............18   DEPARTURE.........+9
TOTAL HEATING UNITS FOR THE MONTH..............57   DEPARTURE........+12
TOTAL HEATING UNITS FOR THE SEASON............150   DEPARTURE........-38
TOTAL HEATING UNITS LAST SEASON TO DATE.......119   DEPARTURE........+31

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-1
TOTAL COOLING UNITS FOR THE MONTH...............0   DEPARTURE.........-2
TOTAL COOLING UNITS FOR THE SEASON............680   DEPARTURE........+81
TOTAL COOLING UNITS LAST SEASON TO DATE.......863   DEPARTURE.......-183

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................21 N    AT  8:57 A.M.
                   AERO.........................18 SSW  AT 10:05 P.M.
                   ASOS.........................19 N    AT 12:08 A.M.
                   DAVIS........................20 NNW  AT 12:07 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................15 NW   AT  6:32 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................15 SSW  AT 11:55 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................14 NW   AT  6:10 A.M.
AVERAGE WIND SPEED AND DIRECTION................8.2 NW
                   ASOS.........................8.6 
                   DAVIS........................8.4 WNW [331 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.59  DEPARTURE......-0.15
                         ASOS..............0.58
TOTAL PRECIPITATION FOR THE YEAR..........39.01  DEPARTURE......-0.82
                         ASOS.............38.81

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

9/01  73/56/65/-3/0.00/703/89                21 ENE AERO 14 ENE RMY 18
9/02  75/57/66/-2/0.37/165/21                39 W   AERO 41 W   RMY 41
9/03  77/61/69/+2/0.00/643/82                18 S   AERO 16 S   RMY N/A
9/04  83/61/72/+5/0.00/375/48                30 SW  AERO 28 SW  RMY 30
9/05  68/54/61/-6/0.00/513/66                23 NW  AERO 17 NW  RMY N/A
9/06  65/56/61/-6/0.03/054/07                37 ENE AERO 36 ENE RMY 36
9/07  70/51/61/-5/0.27/325/42                37 N   AERO 37 N   RMY N/A
9/08  73/53/63/-3/0.00/631/82                25 W   AERO 21 W   RMY N/A
9/09  71/54/63/-3/0.00/537/70                17 SE  AERO 16 SE  RMY 16
9/10  73/57/65/0/0.00/207/27                 25 S   AERO 25 S   RMY N/A
9/11  83/63/73/+8/0.00/419/55                31 SW  AERO 32 SW  RMY N/A
9/12  70/52/61/-4/0.11/015/02                29 ENE AERO 28 ENE RMY 28
9/13  65/49/57/-7/0.00/741/98                29 ENE AERO 27 ENE RMY 27
9/14  69/49/59/-5/0.19/030/04                36 S   AERO 37 S   RMY 37
9/15  78/62/70/+6/0.00/600/80                24 W   AERO 23 W   RMY 22
9/16  72/54/63/0/T/673/90                    25 WNW AERO 23 WNW RMY 25
9/17  67/49/58/-5/0.00/611/82                23 NW  AERO 23 N   RMY N/A
9/18  61/49/55/-7/0.00/579/78                26 NE  AERO 25 NE  RMY 25
9/19  67/43/55/-7/0.00/709/96                17 NE  AERO 18 NE  RMY N/A
9/20  78/50/64/+2/0.00/677/92                21 W   AERO 18 W   RMY 20
9/21  83/60/72/+11/0.00/711/97               21 WNW AERO 18 WNW RMY N/A
9/22  85/62/74/+13/0.00/687/94               24 SW  AERO 23 SW  RMY 25
9/23  88/65/77/+17/0.00/539/74               29 SSW AERO 28 SSW RMY 29
9/24  76/56/66/+6/0.04/616/85                26 W   AERO 26 W   RMY 27  
9/25  73/50/62/+2/0.00/686/95                22 W   AERO 21 W   RMY 21
9/26  79/55/67/+8/0.25/388/54                38 SW  AERO 37 SW  RMY 39
9/27  72/50/61/+2/0.00/695/97                23 S   AERO 23 S   RMY 22
9/28  78/55/67/+9/0.00/664/93                31 S   AERO 29 S   RMY 30
9/29  75/53/64/+6/0.00/619/87                24 NW  AERO 23 NW  RMY 23
9/30  62/49/56/-2/0.00/609/86                23 NNE AERO 16 NNE RMY N/A


PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

10/01  67/52/60/+3/0.06/.../..               28 SW  AERO 25 SSW RMY 29
10/02  74/49/62/+5/0.42/.../..               30 ENE AERO 25 ENE RMY 28
10/03  51/46/49/-7/..../.../..               28 ENE AERO 26 ENE RMY N/A
10/04  59/40/50/-6/..../.../..               38 NNW AERO 38 NNW RMY 38
10/05  58/35/47/-9/0.00/.../..               21 N   AERO 18 SSW RMY N/A

10/06  The low since midnight is 44F, normal daily minimum is 47F


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

RECORDS FOR OCTOBER 6
HIGH 83F IN 1990, 2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942

RECORDS FOR OCTOBER 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 54 W IN 2009

TODAY'S REPORT PREPARED BY: Benjamin Turner