Wednesday, November 15, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 15, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDS MOVE INTO AREA AS PRESSURE DECREASES…

Humidity decreased from 81% at 7:00 A.M. EST to 59% by
1:00 P.M. EST, which resulted in an increase in visibility
from 30 miles to 50 miles by 1:00 P.M. EST. Winds from
the north-northeast have been light to moderate with a
peak gust of 17 kts (20 mph) by 1:00 P.M. EST.
Sky cover started to change from scattered cumulus
at 10:00 A.M. EST to broken stratocumulus by 1:00 P.M.
Temperatures still remain below normal with a high
of 43F by 1:00 P.M. EST which is 7 degrees below normal
of 50F. Overnight we had a low of 31F which is 3 degrees
below normal of 34F.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, few distant stratocumulus N-SE
Temperature: 32F; Dew Point: 27F; Wind: N at 8 kts
Sea-level pressure: 30.32 ins. Hg, rising, then more slowly
Visibility: 30 miles, distant fog in all directions
6-hr Max temp: 35F
6-hr Min temp: 31F
BHO SA 1155 70 SCT 30 267/32/27/1008/032/ FEW SC DSNT N-SE
FEW AC DSNT SW-NE DSNT FG ALQDS/ 8/890 51006 10035 20031

10 A.M.
Weather: Scattered cumulus
Temperature: 42F; Dew Point: 29F; Wind: WNW at 8 kts
Sea-level pressure: 30.32 ins. Hg, rising, then falling
Visibility: 50 miles
BHO SA 1455 30 SCT 50 269/42/29/3008/032/ 8/100 50002

1 P.M.
Weather: Broken stratocumulus
Temperature: 41F; Dew Point: 28F; Wind: ENE at 6 kts,
Wind: Light
Sea-level pressure: 30.25 ins. Hg, falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 43F
6-hr Min temp: 32F
BHO SA 1755 E30 BKN 50 243/41/28/6006/025/ WND LGT/
8/800 56026 10043 20032

SUMMARY FOR TUESDAY, NOVEMBER 14, 2017

TEMPERATURE (DEGREES F)
MAX…..40   NORMAL…..51
MIN…..33   NORMAL…..34
MEAN….37   NORMAL…..42

DEPARTURE FROM 30-YEAR NORMAL…………………….-5
TOTAL DEPARTURE FOR THE MONTH…………………….-1 [-0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE………..5
TOTAL HEATING UNITS FOR THE MONTH………….294   DEPARTURE………..5
TOTAL HEATING UNITS FOR THE SEASON…………562   DEPARTURE……..-290
TOTAL HEATING UNITS LAST SEASON TO DATE…….667   DIFFERENCE…….-105

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 N   AT 12:21 P.M.
AERO……………………15 N   AT 12:21 P.M.
ASOS……………………18 N   AT  4:11 A.M.
DAVIS…………………..16 N   AT 12:20 P.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………12 N   AT  1:32 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13 N   AT  4:38 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..11 N   AT  1:31 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.8 NNW
ASOS…………………..7.9
DAVIS………………….7.3 N [004 DEG.]

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……….0.52  DEPARTURE……-1.68
ASOS…………..0.49
TOTAL PRECIPITATION FOR THE YEAR……….48.32  DEPARTURE……+2.35
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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  74/47/61/+15/T/…/..            35 WNW AERO 35 WNW RMY 38
11/4  54/39/47/+2/0.00/…/..          31 NW  AERO 31 NW  RMY N/A
11/5  61/46/54/+9/0.01/…/..          26 S   AERO 24 S   RMY N/A
11/6  64/47/56/+11/0.05/…/..         32 S   AERO 28 SSW RMY 35
11/7  46/35/41/-4/0.11/…/..          26 NNW AERO 23 N   RMY 26
11/8  43/34/39/-5/0.08/…/..          26 N   AERO 23 N   RMY 27
11/9  50/31/41/-3/0.01/…/..          25 S   AERO 23 S   RMY N/A
11/10 45/20/33/-11/0.00/…/..         46 WNW AER0 44 WNW RMY 46
11/11 36/18/27/-16/0.00/…/..         28 WNW AERO 26 WNW RMY 28
11/12 44/27/36/-7/0.00/…/..          13 E   AERO  9 S   RMY 14
11/13 40/35/38/-5/…/…/..           20 NNW AERO 17 NNW RMY 20
11/14 40/33/37/-5/…/…/..           18 N   AERO 15 N   RMY 18

11/15 Low temp since midnight is 31F; normal low is now 34F

DAILY RECORDS FOR NOVEMBER 2017

11/10/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 20F,
TIES WITH PREVIOUS RECORD SET IN 2004

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

RECORDS FOR NOVEMBER 15
HIGH 74 IN 1993
LOW 15 IN 1933
PRECIP 1.66 INCHES IN 1981
SNOWFALL 4.0 IN 1967
PEAK GUST 65 SSE IN 2008

RECORDS FOR NOVEMBER 16
HIGH 73 IN 1927
LOW 8 IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

TODAY’S REPORT PREPARED BY: Afshin Pourmokhtarian / Kaitlin Geagan