Thursday, October 26, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, OCTOBER 26, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

LOW PRESSURE CONTINUES TO BRING RAIN TO
GREAT BLUE HILL

Today started with fog and 100% humidity
which caused visibility to be limited and
obscured all day. We also had overcast
skies most of the day with small breaks at
1:00 PM EST. We observed light drizzle and
rain which continued on and off through out
the day. We measured 0.64 inches from 7:00
AM EST yesterday to 7:00 AM EST today. With
an additional 0.21 ins measured by 1:00 PM
today. So far this storm totals over 2.00
inches of precipitation.
Winds continue to come from the south/southeast
direction. They have decreased since yesterday
mornings peak gust of 43 kts (50 MPH). Today
winds have been light to moderate gusting up
to 18 kts (21 MPH).
So far for the month of October we are in the top
three warmest for maximum temperatures and  the
warmest on record for minimum temperatures.

Today’s Observations:

7 A.M.
Weather: Overcast nimbostratus, fog and light drizzle
Temperature: 57F; Dew Point: 57F; Wind: SE at 10 kts
Sea-level pressure: 29.63 ins. Hg, falling then rising
Visibility: 3 miles, NNW-NNE 1 1/2 SSW 10 SSW-W 20 W-NNW 5
6-hr Max temp: 58F
6-hr Min temp: 57F
24-hr precip: 0.64 ins.
BHO SA 1155 E8 OVC 3L-F 034/57/57/1310/963/ VSBY NNW-NNE 1 1/2
SSW 10 SSW-W 20 W-NNW 5 PCPN VRY LGT/ 8/6// 55000 MANUAL 70064
ASOS 70066 10058 20057

10 A.M.
Weather: Overcast nimbostratus, fog and drizzle
Temperature: 58F; Dew Point: 58F; Wind: SE at 8 kts
Sea-level pressure: 29.56 ins. Hg, falling, then more rapidly
Visibility: 3/4 miles
3-hr precip: 0.07 ins.
BHO SA 1455 E6 OVC 3/4LF 019/58/58/1308/956/ 8/6// 56015 MANUAL
6007/ ASOS 60007

1 P.M.
Weather: Light drizzle, overcast stratus fractus, patches of fog
drifting below summit SSW-NW
Temperature: 60F; Dew Point: 59F; Wind: SSE at 7 kts
Sea-level pressure: 29.52 ins. Hg, falling, then more rapidly
Visibility: 30 miles ENE-E 15 distant fog in all directions
6-hr Max temp: 60F
6-hr Min temp: 57F
6-hr precip: 0.21 ins.
BHO SA 1755 E12 OVC 30L- 996/60/59/1507/952/ PTCHS FG DRFTG
BLO SMT SSW-NW VSBY ENE-E 15 DSNT FG ALQDS/ 8/7// 56023 MANUAL
6021/ ASOS 60022 10060 20057

SUMMARY FOR WEDNESDAY, OCTOBER 25, 2017

TEMPERATURE (DEGREES F)
MAX…..69   NORMAL…..57
MIN…..57   NORMAL…..40
MEAN….63   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL……………………+14
TOTAL DEPARTURE FOR THE MONTH…………………..+223 [+8.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..24   DEPARTURE………+19
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……………2   DEPARTURE………-15
TOTAL HEATING UNITS FOR THE MONTH………….110   DEPARTURE……..-206
TOTAL HEATING UNITS FOR THE SEASON…………203   DEPARTURE……..-255
TOTAL HEATING UNITS LAST SEASON TO DATE…….269   DEPARTURE………-93

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….50  SSW AT  2:34 P.M.
AERO……………………50  SSW AT  2:35 P.M.
ASOS……………………53  SSW AT  2:34 P.M.
DAVIS…………………..56  SSW AT  2:34 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY…………………42  S   AT  2:35 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………39  S   AT  2:35 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..42  S   AT  2:35A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.6  S
ASOS………………….14.1
DAVIS…………………12.9  S  [175 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.64  DEPARTURE……+0.49
ASOS…………..0.66
TOTAL PRECIPITATION FOR THE MONTH……….2.56  DEPARTURE……-1.19
ASOS…………..2.66
TOTAL PRECIPITATION FOR THE YEAR……….44.42 DEPARTURE……+1.59
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/+9/0.00/122/18             29 ENE AERO 25 ENE RMY 29
10/12 58/48/50/0/T/169/25                 30 NE  AERO 28 ENE RMY 30
10/13 64/48/56/+3/0.00/545/81             20 E   AERO 16 E   RMY 17
10/14 66/54/60/+8/…/637/94              15 SSE AERO 13 SSE RMY 13
10/15 72/58/65/+13/…/067/10             39 SSW AERO 36 SSW RMY 40
10/16 66/39/53/+2/…/146/22              28 NNW AERO 25 NNW RMY 29
10/17 57/35/46/-5/0.00/007/01             25 S   AERO 22 S   RMY 25
10/18 70/45/58/+7/0.00/659/100            25 SW  AERO 23 SW  RMY 22
10/19 72/52/62/+12/0.00/649/99            31 SSW AERO 30 SSW RMY 32
10/20 68/53/61/+11/0.00/…/..            28 WNW AERO 25 WNW RMY 29
10/21 77/52/65/+15/0.00/…/..            21 NW  AERO 20 NW  RMY 18
10/22 73/54/64/+15/0.00/…/..            21 ENE AERO 16 ENE RMY 17
10/23 69/50/60/+11/0.00/…/..            24 SSE AERO 24 SSE RMY N/A
10/24 73/64/69/+20/…/…/..             50 SSE AERO 51 S   RMY N/A
10/25 69/57/63/+14/…/…/..             50 SSW AERO 50 SSW RMY N/A

10/26 Low temp since midnight is 57F; normal low is now 39F

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

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

RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1933
PRECIP 1.72 INCHES IN 1894
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967

RECORDS FOR OCTOBER 27
HIGH 83F IN 1963
LOW 21F IN 1936
PRE 1.79 INCHES IN 1886
SNOW 2.5 INCHES IN 2011
WIND 54 MPH WNW IN 1968

TODAY’S REPORT PREPARED BY: Kaitlin Geagan