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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 6, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST, BREEZY AND WET DAY

Moderate winds from the SSW picked up overnight.
We measured 0.01 inches of precipitation overnight
and an additional trace by 1:00 P.M. EST today.
Temperatures continued to be above normal today
with a high of 64F by 1:00 P.M. EST which is 11
degrees above the normal of 53F. We had a overcast of
altostratus throughout the day. Due to a high level
of humidity all day, distant fog started to form 
later in the morning and throughout the afternoon,
which caused a decrease in visibility from 30 miles 
at 7:00 A.M. EST to 8 miles by 1:00 P.M. EST.
  

PRELIMINARY STATS FOR OCTOBER 2017
 
TEMPERATURE, Deg. F
Avg. Max. 68.0 [+7.7]
Avg. Min. 51.7 [+8.8]
Mean      59.9 [+8.3]
24-hour corrected mean: 59.2
Max. for month: 79F on 5th
Min. for month: 35F on 17th
 
HEATING DEGREE DAYS
Total heating units: 175 [-246]
Total for the season: 268 [-295]
Total for last season: 421

COOLING DEGREE DAYS
Total cooling units: 24 [+19]
Total for the season: 731 [+129]
Total for last season: 901

PRECIPITATION, Inches
Total: 5.94 [+1.25]
Greatest in 24 hrs: 3.12 on the 29th-30th

WIND, mph
Avg. uncorrected wind speed: 12.4
Avg. corrected wind speed: 12.8
Prevailing wind direction: S at 14%
Peak gust and direction: 73 SE on 30th
 
SUNSHINE:
Campbell-Stokes card minutes: 11,520 minutes of possible 19,824 or 58%
Astronomical total minutes: 11,928 minutes of possible 20,524 or 58%

BHO Warmest Octobers, deg F (1885-2017):

1) 59.2 in 2017
2) 58.4 in 1947
3) 56.9 in 2007
4) 56.6 in 1971
5) 56.5 in 1963
6) 55.7 in 1946
7) 55.5 in 1995
8) 55.3 in 1990

Today's Observations:

7 A.M.
Weather: Overcast altostratus
Temperature: 60F; Dew Point: 58F; Wind: S at 21 kts
Sea-level pressure: 29.93 ins. Hg, falling, then more slowly  
Visibility: 50 miles
6-hr Max temp: 63F
6-hr Min temp: 60F
24-hr precip: 0.01
BHO SA 1155 E15 OVC 50 134/60/58/1921/993/ DSNT FG ALQDS/ 8/02/ 
56010 MANUAL 70001 ASOS 70001 10063 20060  

10 A.M.
Weather: Light drizzle, Overcast altostratus
Temperature: 62F; Dew Point: 59F; Wind: SSW at 21 kts
Sea-level pressure: 29.91 ins. Hg, falling, then more slowly
Visibility: 20 miles except 30 at ENE-SSE
3-hr precip.: Trace
BHO SA 1455 E15 OVC 20L- 129/62/59/2121/991/ VSBY 30 ENE-SSE 
DSNT FG ALQDS/ 8/02/ 56005 MANUAL 600// 

1 P.M.
Weather: Light drizzle, Overcast altostratus
Temperature: 63F; Dew Point: 60F; Wind: SSW at 14G18 kts
Sea-level pressure: 29.86 ins. Hg, falling then more rapidly
Visibility: 8 miles except 20 at E to SSE and 15 at SSE to SW 
6-hr Max temp: 64F
6-hr Min temp: 60F
6-hr precip.: Trace
BHO SA 1755 E20 OVC 8L- 111/63/60/2014G18/986/ VSBY 20 E-SSE 15 SSE-SW 
DSNT FG ALQDS/ 8/02/ 58018 MANUAL 600// 10064 20060
 

SUMMARY FOR SUNDAY, NOVEMBER 5, 2017
 
TEMPERATURE (DEGREES F)
MAX.....61   NORMAL.....54
MIN.....46   NORMAL.....37
MEAN....54   NORMAL.....45

DEPARTURE FROM 30-YEAR NORMAL........................+9
TOTAL DEPARTURE FOR THE MONTH........................+40 [+7.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............11   DEPARTURE..........-9
TOTAL HEATING UNITS FOR THE MONTH..............57   DEPARTURE.........-39
TOTAL HEATING UNITS FOR THE SEASON............325   DEPARTURE........-335
TOTAL HEATING UNITS LAST SEASON TO DATE.......500   DIFFERENCE.......-175

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................26 S     AT 11:29 P.M. 
                   AERO........................24 S     AT 11:31 P.M.
                   ASOS........................28 S     AT 11:31 P.M.
                   DAVIS.......................25 S     AT 11:53 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY.....................21 S     AT 11:29 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................22 S     AT 11:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 S     AT 11:31 P.M.
AVERAGE WIND SPEED AND DIRECTION............12.1 E
                   ASOS.....................11.8
                   DAVIS....................11.3 SE  [134 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE......-0.14
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE MONTH..........0.01  DEPARTURE......-0.77 
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE YEAR..........47.81  DEPARTURE......+3.26
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings 

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

10/1  65/42/54/-3/0.00/697/99             18 WNW AERO 16 NW  RMY N/A
10/2  65/46/56/-1/0.00/687/98             21 NNW AERO 21 NNW RMY 21
10/3  67/50/59/+3/0.00/677/97             21 S   AERO 21 S   RMY N/A
10/4  75/50/63/+7/0.00/660/95             30 SSW AERO 30 SW  RMY 32
10/5  79/60/70/+14/0.00/429/62            28 SW  AERO 26 SW  RMY N/A
10/6  73/57/65/+10/T/352/51               15 NW  AERO 14 NW  RMY 15
10/7  75/59/67/+12/T/344/50               29 S   AERO 30 SSW RMY N/A
10/8  71/67/69/+15/0.23/007/01            33 S   AERO 36 SSW RMY 37
10/9  71/68/70/+16/0.22/000/00            43 S   AERO 41 S   RMY 45
10/10 76/61/69/+15/0.00/637/94            21 WNW AERO 20 WNW RMY 21 
10/11 68/55/62/+9/0.00/169/25             29 ENE AERO 25 ENE RMY 29 
10/12 58/48/50/0/T/545/81                 30 NE  AERO 28 ENE RMY 30 
10/13 64/48/56/+3/0.00/637/95             20 E   AERO 16 E   RMY 17
10/14 66/54/60/+8/0.04/067/10             15 SSE AERO 13 SSE RMY 13 
10/15 72/58/65/+13/0.01/146/22            39 SSW AERO 36 SSW RMY 40 
10/16 66/39/53/+2/T/007/01                28 NNW AERO 25 NNW RMY 29
10/17 57/35/46/-5/0.00/659/100            25 S   AERO 22 S   RMY 25
10/18 70/45/58/+7/0.00/649/99             25 SW  AERO 23 SW  RMY 22 
10/19 72/52/62/+12/0.00/614/94            31 SSW AERO 30 SSW RMY 32
10/20 68/53/61/+11/0.00/651/100           28 WNW AERO 25 WNW RMY 29
10/21 77/52/65/+15/0.00/648/100           21 NW  AERO 20 NW  RMY 18 
10/22 73/54/64/+15/0.00/561/80            21 ENE AERO 16 ENE RMY 17
10/23 69/50/60/+11/0.00/103/16            24 SSE AERO 24 SSE RMY N/A
10/24 73/64/69/+20/.../032/05             50 SSE AERO 51 S   RMY N/A 
10/25 69/57/63/+14/.../000/00             50 SSW AERO 50 SSW RMY N/A
10/26 60/44/52/+4/.../000/00              40 W   AERO 41 W   RMY 39 
10/27 60/42/51/+3/0.00/632/100            28 W   AERO 25 W   RMY N/A
10/28 66/47/57/+9/0.00/548/87             24 S   AERO 23 S   RMY 26 
10/29 62/55/59/+12/.../000/00             62 ESE AERO 63 ESE RMY N/A      
10/30 63/48/56/+9/.../193/31              73 SE  AERO 68 SE  RMY N/A
10/31 56/43/50/+3/0.00/622/100            35 WSW AERO 33 WSW RMY 35 

DAILY RECORDS FOR OCTOBER

10/8/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 67F,
         BREAKS PREVIOUS RECORD OF 60F SET IN 1944

10/9/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 61F SET IN 2011

10/9/17: MONTHLY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 67F SET ON OCTOBER 13, 1990
         AND TIED ON OCTOBER 8, 2017

10/24/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 64F,
          BREAKS PREVIOUS RECORD OF 61F SET IN 2001

10/30/17: DAILY MAXIMUM PEAK GUST 63 KTS (73 MPH) SE
          BREAK PREVIOUS RECORD OF 57 KTS (66 MPH) NW SET IN 1963

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

11/1 53/39/46/0/0.00/.../..               25 SE  AERO 24 SE  RMY 25
11/2 71/49/60/+14/0.00/.../..             28 SSE AERO 25 SSE RMY 27
11/3 74/47/61/+15/T/.../..                35 WNW AERO 35 WNW RMY 38 
11/4 54/39/47/+2/0.00/.../..              31 NW  AERO 31 NW  RMY N/A 
11/5 61/46/54/+9/.../.../..               26 S   AERO 24 S   RMY N/A

11/6 Low temp since midnight is 60F; normal low is now 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: Afshin Pourmokhtarian / Kaitlin Geagan