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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, NOVEMBER 6, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER DAY IN THE CLOUDS ATOP GREAT BLUE HILL....

Fog reduced visibility to a 1/16th mile at each 
observation today. A very light drizzle left only
a trace of precipitation at the 10 A.M. and 1 P.M.
observations. Last night's rain left 0.53 inches in
the gauge this morning. Pressure has shown a notable
decline similar to yesterday, where at 4 millibar drop
was observed between 7 A.M. and 1 P.M. The high 
temperature so far today is 50F, 3 degrees below the 
normal daily maximum of 53F. The low since midnight is 
45F, 9 degrees above the normal of 36F.   
 

PRELIMINARY STATS FOR OCTOBER 2018

TEMPERATURE, Deg. F
Avg. Max. 58.0 [-2.3]
Avg. Min. 42.7 [-0.2]
Mean 50.4 [-1.2]
24-hour corrected mean: 50.2
Max. for month: 82F on the 10th
Min. for month: 27F on the 22nd and 26th

HEATING DEGREE DAYS
Total heating units: 457 [+36]
Total for the season: 544 [-19]
Total for last season: 268

PRECIPITATION, Inches
Total: 5.85 in. [+1.16]
Greatest in 24 hrs: 2.08 inches on October 27

WIND, mph
Avg. uncorrected wind speed: 11.6 mph
Avg. corrected wind speed: 12.0
Prevailing wind direction: W [14% of total hours]
Peak gust and direction: 54 NE 

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

Today's Observations:

7 A.M.
Weather: Light drizzle and fog
Temperature: 46F; Dew Point: 46F; Wind: NNW at 7G14 kts  
Sea-level pressure: 30.03 ins. Hg, falling steadily      
Visibility: 1/16 mile, fog
6-hr Max temp: 49F
6-hr Min temp: 45F
24-hr Precip: 0.53 ins.   
BHO SA 1155 W3 X 1/16L-F 168/46/46/3307G14/003/ L-CTD/ 8//// 
70053 58004 10049 20045

10 A.M.
Weather: Very light drizzle and fog
Temperature: 47F; Dew Point: 47F; Wind: E at 2 kts,
Wind: Light and variable  
Sea-level pressure: 29.98 ins. Hg, falling rapidly 
Visibility: 1/16 mile, fog
3-hr Precip: Trace
BHO SA 1455 W3 X 1/16L-F 151/47/47/0902/998/ L-CTD PCPN VRY LGT WND 
L/V/ 8//// 6//// 58017 

1 P.M.
Weather: Very light drizzle and fog
Temperature: 50F; Dew Point: 50F; Wind: SE at 8 kts 
Sea-level pressure: 29.86 ins. Hg, falling rapidly     
Visibility: 1/16 mile, fog
6-hr Max temp: 50F
6-hr Min temp: 45F 
6-hr Precip: Trace
BHO SA 1755 W3 X 1/16L-F 113/50/50/1408/986/ L-CTD PCPN VRY LGT/ 
8//// 6//// 58038 10050 20045

 
SUMMARY FOR MONDAY, NOVEMBER 5, 2018 

TEMPERATURE (DEGREES F)
MAX.....49   NORMAL.....54
MIN.....40   NORMAL.....37
MEAN....45   NORMAL.....45

DEPARTURE FROM 30-YEAR NORMAL........................0
TOTAL DEPARTURE FOR THE MONTH......................+31 [+6.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............20   DEPARTURE..........0
TOTAL HEATING UNITS FOR THE MONTH..............73   DEPARTURE........-23
TOTAL HEATING UNITS FOR THE SEASON............617   DEPARTURE........-43
TOTAL HEATING UNITS LAST SEASON TO DATE.......325   DIFFERENCE......+292

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 W   AT 11:01 P.M.
                   AERO.........................29 E   AT 11:01 P.M. 
                   ASOS.........................32 E   AT 11:02 P.M. 
                   DAVIS........................32 E   AT 11:01 P.M. RMY 28
FASTEST MILE FOR YESTERDAY......................23 E   AT 11:01 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................23 E   AT 11:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 E   AT 11:03 P.M.
AVERAGE WIND SPEED AND DIRECTION..............11.4 E
                   ASOS.......................11.4   
                   DAVIS......................12.0 E [98 deg.]  

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.53  DEPARTURE.......+0.38
                         ASOS..............0.55
TOTAL PRECIPITATION FOR THE MONTH..........2.34  DEPARTURE.......+1.57
                         ASOS..............2.42 
TOTAL PRECIPITATION FOR THE YEAR..........55.38  DEPARTURE......+11.02
                         ASOS.............57.28 


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 65/53/59/+2/0.22/042/06         21 ENE AERO 18 SSW RMY N/A
10/02 64/53/59/+2/0.77/000/00         33 S   AERO 32 S   RMY 35 TSTM
10/03 60/52/56/0/0.33/000/00          18 NNE AERO 14 NNE RMY 14
10/04 69/57/63/+7/0.00/209/30         29 SSW AERO 29 SSW RMY 32
10/05 64/47/56/0/0.00/638/92          25 NE  AERO 21 NE  RMY 24
10/06 64/45/55/0/0.00/276/40          23 SSW AERO 23 SSW RMY 25
10/07 75/56/66/+11/0.05/076/11        28 NE  AERO 24 ENE RMY 27
10/08 56/53/55/+1/0.03/000/00         22 ENE AERO 20 ENE RMY N/A
10/09 75/56/66/+12/0.00/211/31        26 WSW AERO 28 SW  RMY 29
10/10 82/65/74/+20/0.00/496/73        24 WSW AERO 23 WSW RMY 25
10/11 70/56/63/+10/0.78/000/00        48 NNE AERO 47 NNE RMY 50
10/12 59/44/52/-1/0.31/182/27         32 NW  AERO 32 NW  RMY 33
10/13 49/40/45/-8/0.17/114/17         21 WNW AERO 20 WNW RMY 20
10/14 55/37/46/-6/0.00/127/19         21 W   AERO 18 W   RMY 21
10/15 66/44/55/+3/0.06/033/05         46 W   AERO 46 W   RMY N/A
10/16 56/41/49/-2/0.03/622/94         48 W   AERO 48 W   RMY N/A
10/17 60/39/50/-1/0.01/587/89         48 W   AERO 50 W   RMY 53
10/18 45/33/39/-12/0.00/657/100       32 WNW AERO 35 WNW RMY 36
10/19 60/31/46/-4/0.00/602/92         33 SSW AERO 36 SSW RMY 36
10/20 62/46/54/+4/0.00/228/35         35 SSW AERO 37 SSW RMY 33
10/21 46/31/39/-11/0.02/363/56        39 NNW AERO 41 NW  RMY 41
10/22 50/27/39/-10/0.00/497/77        24 W   AERO 22 W   RMY 21
10/23 53/40/47/-2/0.51/103/16         29 WNW AERO 29 WNW RMY 29  TSTM
10/24 45/35/40/-9/0.03/096/15         31 NW  AERO 31 NW  RMY 32 
10/25 48/32/40/-9/0.00/510/80         35 NW  AERO 35 NW  RMY 36
10/26 45/27/36/-12/0.00/610/96        20 NW  AERO 19 NW  RMY N/A
10/27 48/38/43/-5/2.08/000/00         54 NE  AERO 55 NE  RMY 55
10/28 51/40/46/-2/0.07/000/00         23 NNE AERO 23 NNE RMY N/A TSTM
10/29 55/40/48/+1/0.37/138/22         30 WSW AERO 30 WSW RMY 34
10/30 45/34/40/-7/0.00/306/49         28 NW  AERO 28 NW  RMY 30
10/31 55/32/44/-3/0.01/367/59         35 SSW AERO 36 SSW RMY 37

DAILY RECORDS FOR OCTOBER

10/10/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 65F,
           BREAKS PREVIOUS RECORD OF 62F SET IN 1949


PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/01 65/49/57/+11/..../.../..         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/..../.../..         37 SSW AERO 41 SSW RMY N/A
11/03 64/42/53/+7/..../.../..          59 W   AERO 60 W   RMY 58
11/04 52/37/45/0/..../.../..           31 W   AERO 30 W   RMY N/A
11/05 49/40/45/0/..../.../..           30 ENE AERO 29 ENE RMY 28

11/06 Low temp since midnight is 45F; normal low is 36F

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

RECORDS FOR NOVEMBER 6
HIGH 71 IN 1959, 2015
LOW 22 IN 1951
PRECIP 1.72 INCHES IN 1907
SNOWFALL 8.0 IN 1894
PEAK GUST 63 W IN 1973

RECORDS FOR NOVEMBER 7
HIGH 75 IN 1938
LOW 21 IN 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 3.5 IN 2012
PEAK GUST 69e ENE IN 1953

TODAY'S REPORT PREPARED BY: Benjamin Turner