Friday, November 3, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 3, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER ABOVE AVERAGE TEMPERATURE DAY

Temperatures continued to be above average today
with a high of 72F by 1:00 P.M. EST. This is
18 degrees above the normal of 54F. We were
also 16 degrees above average yesterday with
a high of 71F. Overnight we went down to 56F
which is 19 degrees above the normal of 37F.
As pressure drops winds from the SSW have
begun to pick up. Humidity dropped throughout
the day but a distant haze lingered into the
afternoon limiting visibility to 60 miles at
1:00 PM.

October’s mean temperature was the warmest in
BHO history at 59.2F. Although we ended the
month above in precipitation most of the rainfall
happened during a storm on the 29-30th which
alone totaled 3.12 inches. We also had a record
breaking daily wind gust at 73 MPH during this
storm on the 30th. The previous record was
66 MPH set back in 1963.

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: Scattered altocumulus, broken cirrostratus, few
cumulus distant ESE and SSW-WNW
Temperature: 58F; Dew Point: 53F; Wind: SSW at 14 kts,
Sea-level pressure: 30.07 ins. Hg, falling, then more quickly
Visibility: 50 miles distant fog in all directions
6-hr Max temp: 58F
6-hr Min temp: 57F
24-hr precip: 0.00
BHO SA 1155 16 SCT E250 BKN 50 183/58/53/2014/007/ FEW CU DSNT
ESE AND SSW-WNW DSNT FG ALQDS/ 8/136 58013 10058 20057

10 A.M.
Weather: Scattered cirrostratus, few cumulus distant E-S
and WSW-WNW, few altocumulus E-S
Temperature: 66F; Dew Point: 57F; Wind: SW at 15G20 kts
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 60 miles
BHO SA 1455 250 SCT 60 168/66/57/2215G20/003/ FEW CU DSNT E-S
AND WSW-WNW FEW AC E-S DSNT FG W/ 8/168 58015

1 P.M.
Weather: Scattered altocumulus, broken cirrostatus, few cumulus
in all directions
Temperature: 72F; Dew Point: 57F; Wind: SSW at 15G21 kts,
Peak Wind: 26 kts (30 MPH) at 12:56 P.M. EST
Sea-level pressure: 29.94 ins. Hg, falling, then more quickly
Visibility: 60 miles distant haze in all directions
6-hr Max temp: 72F
6-hr Min temp: 58F
BHO SA 1755 20 SCT E250 BKN 60 140/72/57/2115G21/994/ FEW CU
ALQDS DSNT HZ W PK WND 2126/56/ 8/138 58028 10072 20058

SUMMARY FOR THURSDAY, NOVEMBER 2, 2017

TEMPERATURE (DEGREES F)
MAX…..71   NORMAL…..55
MIN…..49   NORMAL…..37
MEAN….60   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL……………………+14
TOTAL DEPARTURE FOR THE MONTH……………………+14 [+6.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE SEASON…………731   DEPARTURE……..+129
TOTAL COOLING UNITS LAST SEASON TO DATE…….901   DEPARTURE……..-170

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………5   DEPARTURE………-14
TOTAL HEATING UNITS FOR THE MONTH…………..24   DEPARTURE………-14
TOTAL HEATING UNITS FOR THE SEASON…………292   DEPARTURE……..-309
TOTAL HEATING UNITS LAST SEASON TO DATE…….452   DEPARTURE……..-160

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 SSE   AT  7:43 A.M.
AERO……………………25 SSE   AT  7:43 A.M.
ASOS……………………28 S     AT  5:37 P.M.
DAVIS…………………..26 SSE   AT  7:43 P.M.  RMY 27
FASTEST MILE FOR YESTERDAY………………….M ****
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 S     AT   6:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..20 SE    AT   7:56 A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.1 S
ASOS………………….13.9
DAVIS…………………13.2 S  [172 DEG.] **** Contacting Anemometer down

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.31
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….47.80  DEPARTURE……+3.72
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/…/…/..             50 SSW AERO 50 SSW RMY N/A
10/26 60/44/52/+4/…/…/..              40 W   AERO 41 W   RMY 39
10/27 60/42/51/+3/0.00/…/..             28 W   AERO 25 W   RMY N/A
10/28 66/47/57/+9/0.00/…/..             24 S   AERO 23 S   RMY 26
10/29 62/55/59/+12/…/…/..             62 ESE AERO 63 ESE RMY N/A
10/30 63/48/56/+9/…/…/..              73 SE  AERO 68 SE  RMY N/A
10/31 56/43/50/+3/0.00/…/..             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 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

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 Low temp since midnight is 56F; 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 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

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

TODAY’S REPORT PREPARED BY: Kaitlin Ann Geagan