Thursday, October 27, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, OCTOBER 27, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

FIRST FREEZE OF THE SEASON, NO SNOW OBSERVED YET

The first freeze of the season occurred near midnight last night which
is one week later than the usual freeze date of October 20. Temps
continued to drop to an overnight low of 28F this morning. Mostly cloudy
skies brought light rain shortly before the 1:00PM EST observation, but
no snow had yet been observed.  Visibility gradually diminished from
70 miles to 25 miles throughout the day.

7 A.M.
Weather: Few stratocumulus NNE-SSW, broken altocumulus
Temperature: 32F; Dew Point: 28F; Wind: N at 7 kts
Sea-level pressure: 30.45 ins. Hg, rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 32F
6-hr Min temp: 28F
24-hr precip: 0.00 in.
BHO SA 1155 E130 BKN 70 312/32/28/3507/045/ FEW SC NNE-SSW/
8/530 53007 10032 20028

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus,
overcast cirrostratus
Temperature: 43F; Dew Point: 30F; Wind: estimated NE at 2 kts
Wind: Light and variable
Sea-level pressure: 30.45 ins. Hg, rising then falling
Visibility: 40 miles
BHO SA 1455 44 SCT E160 BKN 280 OVC 40 311/43/30/E0502/045/
WND L/V/ 8/537 58001

1 P.M.
Weather: Light rain, broken stratocumulus, overcast nimbostratus
Temperature: 44F; Dew Point: 36F; Wind: ENE at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.39 ins. Hg, falling, then more quickly
Visibility: 25 miles
6-hr Max. temp: 46F
6-hr Min. temp: 32F
6-hr precip: Trace
BHO SA 1755 E37 BKN 54 OVC 25R- 291/44/36/0705/039/ WND LGT/
8/521 58020 MANUAL 600// 10046 20032

SUMMARY FOR WEDNESDAY, OCTOBER 26, 2016

TEMPERATURE (DEGREES F)
MAX…..47   NORMAL…..57
MIN…..32   NORMAL…..39
MEAN….40   NORMAL…..48

DEPARTURE FROM 30-YEAR NORMAL……………………-8
TOTAL DEPARTURE FOR THE MONTH…………………..+87 [+3.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………7   DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE SEASON…………901   DEPARTURE……..+299
TOTAL COOLING UNITS LAST SEASON TO DATE…….810   DIFFERENCE……..+91

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25   DEPARTURE……….+8
TOTAL HEATING UNITS FOR THE MONTH………….246   DEPARTURE………-87
TOTAL HEATING UNITS FOR THE SEASON…………321   DEPARTURE……..-154
TOTAL HEATING UNITS LAST SEASON TO DATE…….383   DIFFERENCE……..-62

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29 WNW AT  8:51 A.M.
ASOS……………………31 NW  AT  8:52 A.M.
DAVIS…………………..30 WNW AT  8:51 A.M. RMY 31
FASTEST MILE FOR YESTERDAY…………………20 WNW AT  8:52 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 NW  AT  9:26 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19 WNW AT  8:52 A.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5 NW
ASOS………………….11.3
DAVIS…………………10.0 NW [310 Deg.] *last of several occurrences

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……….5.72  DEPARTURE……+1.81
ASOS…………..5.75
TOTAL PRECIPITATION FOR THE YEAR……….33.04  DEPARTURE……-9.95
ASOS………….33.39

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  57/52/55/-2/1.22/000/00                 33 NNE AERO  M  RMY 34
10/2  55/52/54/-3/0.19/000/00                 23 N   AERO  M  RMY N/A
10/3  69/53/61/+5/0.00/404/58                 21 ENE AERO  M  RMY 20
10/4  61/47/54/-2/T/493/71                    26 NE  AERO  M  RMY 27
10/5  61/44/53/-3/0.00/630/91                 22 NE  AERO  M  RMY 21
10/6  71/46/59/+4/0.00/682/99                 16 SW* AERO  M  RMY 15
10/7  75/54/65/+10/0.00/679/99                16 S   AERO  M  RMY 16
10/8  69/53/61/+7/0.00/130/19                 23 SSW AERO  M  RMY 23
10/9  63/44/54/0/1.89/000/00                  28 N   AERO  M  RMY 34
10/10 57/40/49/-5/0.00/658/97                 32 NW  AERO  M  RMY 32
10/11 62/39/51/-2/0.00/655/97                 17 N   AERO  M  RMY N/A
10/12 68/49/59/+6/0.00/645/96                 17 S   AERO  M  RMY 17
10/13 71/52/62/+9/T/348/52                    24 SSW AERO  M  RMY 28
10/14 58/41/50/-2/0.00/667/100                26 NNW AERO  M  RMY 25
10/15 58/38/48/-4/0.00/578/87                 23 S   AERO  M  RMY 26
10/16 68/46/57/+6/0.00/562/85                 28 SSW AERO  M  RMY 30
10/17 76/58/67/+16/0.00/494/75                23 WSW AERO  M  RMY N/A
10/18 74/56/65/+14/0.54/210/32                35 SSW AERO  M  RMY 37
10/19 79/58/69/+19/0.00/549/84                29 SSW AERO  M  RMY N/A
10/20 64/54/59/+9/0.05/429/66                 23 ENE AERO  M  RMY 22
10/21 75/57/66/+16/1.60/142/22                30 ESE AERO  M  RMY 31
10/22 65/40/53/+4/0.23/…/..                 37 WSW AERO  M  RMY N/A
10/23 56/41/49/0/0.00/…/..                  47 W   AERO  M  RMY 50
10/24 59/41/50/+1/T/…/..                    38 W   AERO  M  RMY 40
10/25 48/33/41/-8/0.00/…/..                 33 WNW AERO  M  RMY 35
10/26 47/32/40/-8/0.00/…/..                 29 WNW AERO  M  RMY 31

10/27 Low temp since midnight is 28F; normal low is now 39F

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

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

RECORDS FOR OCTOBER 28
HIGH 81F IN 1919
LOW 23F IN 1914
PRECIP 2.46 INCHES IN 2006
SNOWFALL TRACE IN 1934,1957,1979
PEAK GUST 71 MPH SSW IN 1995

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle