Saturday, November 4, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 4, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

MORE SEASONABLE TEMPERATURES TODAY AFTER NEAR RECORD
WARMTH ON FRIDAY…

The high temperature on Friday of 74F was one degree short
of the record for the date of 75F set in 1990. There was
a trace of precipitation late afternoon on Friday during
the passage of a cold front, which also brought a peak wind
gust to 35 mph WNW at 5:59 PM EST yesterday. The temperature
continued to drop to 47F by midnight and to 39F just before
sunrise this morning. Scattered cirrus early this morning
expanded through the day to a thin overcast by this afternoon.
With dew points near 30F today, the visibility has been
excellent all day near 80 miles.

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: N/A
Astronomical total minutes: N/A

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: Thin scattered cirrus, few lower dense cirrus ESE
Temperature: 40F; Dew Point: 30F; Wind: NNW at 11 kts,
Sea-level pressure: 30.32 ins. Hg, rising, then rising more slowly
Visibility: 80 miles
6-hr Max temp: 46F
6-hr Min temp: 39F
24-hr precip: Trace
BHO SA 1155 250 –SCT 80 267/40/30/3411/032/ FEW LWR DNS CI ESE/
8/001 51029 10046 20039

10 A.M.
Weather: Thin broken cirrus, few cumulus distant SE-SSE
Temperature: 48F; Dew Point: 30F; Wind: S at 4 kts
Sea-level pressure: 30.37 ins. Hg, rising
Visibility: 80 miles
BHO SA 1455 250 -BKN 80 283/48/30/1904/037/ FEW CU DSNT SE-SSE/
8/001 52016

1 P.M.
Weather: Thin overcast cirrus, few cumulus distant in ESE-SSE,
few lower dense cirrus in SE-WSW
Temperature: 52F; Dew Point: 30F; Wind: E at 5 kts,
Sea-level pressure: 30.35 ins. Hg, falling
Visibility: 80 miles
6-hr Max temp: 53F
6-hr Min temp: 40F
BHO SA 1755 250 –OVC 80 277/52/30/1005/035/ FEW CU DSNT ESE-SSE
FEW LWR DNS CI SE-WSW/ 8/001 56006 10053 20040
SUMMARY FOR FRIDAY, NOVEMBER 3, 2017

TEMPERATURE (DEGREES F)
MAX…..74   NORMAL…..54
MIN…..47   NORMAL…..37
MEAN….61   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL……………………+15
TOTAL DEPARTURE FOR THE MONTH……………………+29 [+9.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4   DEPARTURE………-15
TOTAL HEATING UNITS FOR THE MONTH…………..28   DEPARTURE………-29
TOTAL HEATING UNITS FOR THE SEASON…………296   DEPARTURE……..-324
TOTAL HEATING UNITS LAST SEASON TO DATE…….460   DIFFERENCE…….-164

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….35 WNW   AT  5:59 P.M.
AERO……………………35 WNW   AT  5:59 P.M.
ASOS……………………36 W     AT  6:01 P.M.
DAVIS…………………..35 WNW   AT  5:57 P.M.  RMY 38
FASTEST MILE FOR YESTERDAY…………………25 WNW   AT  5:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 NW    AT  9:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..25 NNW   AT  9:15 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.9 SSW
ASOS………………….15.7
DAVIS…………………15.1 WSW  [244 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.47
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….47.80  DEPARTURE……+3.56
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 Low temp since midnight is 39F; normal low is now 37F

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

RECORDS FOR NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965

RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 1.5 IN 1892
PEAK GUST 69 W IN 2004

TODAY’S REPORT PREPARED BY: Michael Iacono / Afshin Pourmokhtarian