Sunday, October 8, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 8, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

VERY WARM OVERNIGHT TEMPS, HEAVY RAIN IN LATE MORNING

Temperatures reached 75F yesterday afternoon and fell to an overnight
low of just 66F before midnight.  Despite cooling temperatures with
the arrival of rain, the low so far today is still a very warm 67F.
Light rain began around 9:00AM EST with heavy rain starting after the
10:00AM observation.  The total by 1:00PM was 0.23 in.  Light drizzle
began just before 1:00PM and continued through the observation.  Winds
have been out of the south-southwest and consistently gusting up to
30 MPH.  The peak gust so far is 33 MPH.

Today’s Observations:

7 A.M.
Weather: Scattered cumulus fractus, broken altocumulus, broken
cirrostratus
Temperature: 69F; Dew Point: 66F; Wind: S at 19G26 kts,
Peak wind: 28 kts (32 MPH) SSW at 6:10AM EST
Sea-level pressure: 29.96 ins. Hg, falling, then more slowly
Visibility: 20 miles, except 40 miles N-SSE, distant haze in all
directions
6-hr Max temp: 69F
6-hr Min temp: 67F
24-hr precip: Trace
BHO SA 1155 12 SCT E64 BKN 250 BKN 20 147/69/66/1919G26/996/ VSBY
N-SSE 40 PK WND 2028/10 DSNT HZ ALQDS/ 8/736 56012 10069 20067

10 A.M.
Weather: Light rain, few cumulus fractus in all directions, broken
nimbostratus,
broken altocumulus
Temperature: 69F; Dew Point: 67F; Wind: SSW at 17G22 kts,
Peak wind: 28 kts (32 MPH) SSW at 9:07AM EST
Sea-level pressure: 29.96 ins. Hg, falling then rising
Visibility: 8 miles, except 20 miles ENE-SSE, distant fog SSE-ENE
3-hr precip: 0.01 in.
BHO SA 1455 E54 BKN 84 BKN 8R- 146/69/67/2117G22/996/ FEW CUFRA ALQDS
VSBY 20 ENE-SSE DSNT FG SSE-ENE PK WND 2028/07/ 8/720 55001 MANUAL 6001/
ASOS 60001

1 P.M.
Weather: Light drizzle, overcast nimbostratus
Temperature: 69F; Dew Point: 68F; Wind: SSW at 18G24 kts,
Peak wind: 26 kts (30 MPH) S at 12:44PM EST
Sea-level pressure: 29.91 ins. Hg, falling, then more slowly
Visibility: 10 miles, distant fog in all directions
6-hr Max temp: 71F
6-hr Min temp: 67F
6-hr precip: 0.23 in.
BHO SA 1755 E6 OVC 10L- 129/69/68/2018G24/991/ DSNT FG ALQDS PCPN VRY LGT
PK WND 1926/44/ 8/02/ 56017 MANUAL 6023/ ASOS 60025 10071 20067

SUMMARY FOR SATURDAY, OCTOBER 7, 2017

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..63
MIN…..59   NORMAL…..46
MEAN….67   NORMAL…..55

DEPARTURE FROM 30-YEAR NORMAL……………………+12
TOTAL DEPARTURE FOR THE MONTH……………………+42 [+5.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH……………7   DEPARTURE……….+4
TOTAL COOLING UNITS FOR THE SEASON…………714   DEPARTURE……..+114
TOTAL COOLING UNITS LAST SEASON TO DATE…….894   DEPARTURE……..-180

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-11
TOTAL HEATING UNITS FOR THE MONTH…………..28   DEPARTURE………-38
TOTAL HEATING UNITS FOR THE SEASON…………121   DEPARTURE………-88
TOTAL HEATING UNITS LAST SEASON TO DATE…….129   DEPARTURE……….-8

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29  S  AT  9:02 P.M.
AERO……………………30 SSW AT 10:51 P.M.
ASOS……………………32 SSW AT  9:02 P.M.
DAVIS…………………..33 SSW AT  9:01 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY…………………24 SSW AT  9:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 SSW AT  9:02 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24 SSW AT  9:01 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.8  S
ASOS………………….12.2
DAVIS………………….N/A

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-1.04
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….41.86  DEPARTURE……+1.74
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/…/..               18 WNW AERO 16 NW  RMY N/A
10/2  65/46/56/-1/0.00/…/..               21 NNW AERO 21 NNW RMY 21
10/3  67/50/59/+3/0.00/…/..               21 S   AERO 21 S   RMY N/A
10/4  75/50/63/+7/0.00/…/..               30 SSW AERO 30 SW  RMY 32
10/5  79/60/70/+14/0.00/…/..              28 SW  AERO 26 SW  RMY N/A
10/6  73/57/65/+10/T/…/..                 15 NW  AERO 14 NW  RMY 15
10/7  75/59/67/+12/T/…/..                 29 S   AERO 30 SSW RMY N/A
10/7 Low temp since midnight is 59F; normal low is now 46F

DAILY RECORDS FOR OCTOBER

None so far.

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

RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.31 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996

RECORDS FOR OCTOBER 9
HIGH 82F IN 2011
LOW 29F IN 1907,1937
PRECIP 2.54 INCHES IN 1976
SNOWFALL 0.2 INCHES IN 1888
PEAK GUST 81e MPH S IN 1976 (RECORD FOR MONTH)

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle