Tuesday, October 31, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 31, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY, CLEAR, AND SEASONABLE AUTUMN DAY

Winds have slowed down since yesterday’s
daily record breaking wind gust of 73 MPH
from the SE. Yesterday we had gust over 50
MPH. Today winds from the west gusted to 32
MPH. Temperatures continue to be more
seasonable than the beginning for October
with a high of 57F by 1:00 P.M. EST. The
normal for this day is 55F.
Humidity was very low all day which made for
65-70 miles of visibility at each observation.
We had a mixture of cumulus and altocumulus
cloud during each observation as well.

Today’s Observations:

7 A.M.
Weather: Clear, few cumulus SW-NNE
Temperature: 45F; Dew Point: 33F; Wind: WSW at 10 kts
Sea-level pressure: 29.93 ins. Hg, rising, then more quickly
Visibility: 65 miles
6-hr Max temp: 48F
6-hr Min temp: 45F
24-hr precip: Trace
BHO SA 1155 CLR 65 135/45/33/2410/993/ FEW CU SW-NNE
FEW CU DSNT S/ 8/100 53023 ASOS 70001 10048 20045

10 A.M.
Weather: Scattered altocumulus, few altocumulus distant S
Temperature: 53F; Dew Point: 28F; Wind: W at 26G27 kts,
Peak Wind: 27 kts (31 MPH) at 09:53 A.M. EST
Sea-level pressure: 29.95 ins. Hg, rising then falling
Visibility: 70 miles
BHO SA 1455 17 SCT 70 141/53/28/2615G27/995/ FEW AC DSNT S PK WND
2527/53/ 8/070 50006

1 P.M.
Weather: Scattered altocumulus, few distant cumulus E-NE
Temperature: 55F; Dew Point: 26F; Wind: W at 17G24 kts
Sea-level pressure: 29.94 ins. Hg, falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 57F
6-hr Min temp: 45F
BHO SA 1755 16 SCT 70 138/55/26/2617G24/994/ FEW CU DSNT E-NE
8/170 55003 10057 20045

SUMMARY FOR MONDAY, OCTOBER 30, 2017

TEMPERATURE (DEGREES F)
MAX…..63   NORMAL…..56
MIN…..48   NORMAL…..38
MEAN….56   NORMAL…..47

DEPARTURE FROM 30-YEAR NORMAL…………………….+9
TOTAL DEPARTURE FOR THE MONTH…………………..+260 [+8.5 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……………9   DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE MONTH………….160   DEPARTURE……..-243
TOTAL HEATING UNITS FOR THE SEASON…………253   DEPARTURE……..-292
TOTAL HEATING UNITS LAST SEASON TO DATE…….399   DEPARTURE……..-146

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….73 SE   AT  12:38 A.M.
AERO……………………68 SE   AT  12:38 A.M.
ASOS……………………61 ESE  AT   1:31 A.M.
DAVIS…………………..74 SE   AT  12:38 A.M.  RMY N/A
FASTEST MILE FOR YESTERDAY…………………48 ESE  AT  12:38 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………41 S    AT   8:30 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..49 SE   AT  12:39 A.M.
AVERAGE WIND SPEED AND DIRECTION………….25.5 SSW
ASOS………………….22.8
DAVIS…………………22.6 SW  [214 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….5.94  DEPARTURE……+1.41
ASOS…………..6.08
TOTAL PRECIPITATION FOR THE YEAR……….47.80  DEPARTURE……+4.19
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 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 Low temp since midnight is 44F; 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

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

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

RECORDS FOR OCTOBER 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945

RECORDS FOR NOVEMBER 1
HIGH 75 IN 2003
LOW 22 IN 1913,1923
PRECIP 2.93 INCHES IN 1985
SNOWFALL TRACE IN 1906,1951
PEAK GUST 78 ESE IN 1997

TODAY’S REPORT PREPARED BY: Kaitlin Ann Geagan/ Afshin Pourmokhatarian