Thursday, November 9, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 9, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
OVERNIGHT LOWS BRING FIRST FROST OF THE SEASON…
We had another chilly start to the day on top
of Great Blue Hill with an overnight minimum
temperature of 31F. This is four degrees below
our daily normal of 35F. With temperatures dropping
below freezing we observed our first frost layer
early this morning.
Temperatures continue to be below seasonable with
a maximum temperature for yesterday of 43F. This is
ten degrees below our normal of 53F. We have had a high
so far today of 49F by 1:00 PM EST. Winds have been light
to moderate with a shift in direction before noon from
northeast to southeast.
Today’s Observations:
7 A.M.
Weather: Clear, few cumulus NE-SW, few Altocumulus
ESE-S, patches of ground fog below summit
Temperature: 32F; Dew Point: 25F; Wind: N at 10 kts
Sea-level pressure: 30.28 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr precip: 0.00 inches
BHO SA 1155 CLR 70 253/32/25/0110/028/ FEW CU ENE-S
FEW AC ESE-S PTCHS GF BLO SMT E AND W/ 8/160 50006
10034 20031
10 A.M.
Weather: Scattered altocumulus, few distant cumulus N-S
Temperature: 43F; Dew Point: 30F; Wind: NE at 5 kts,
Wind: Light
Sea-level pressure: 30.25 ins. Hg, falling, then more quickly
Visibility: 65 miles, distant haze in all directions
BHO SA 1455 120 SCT 65 245/43/30/0505/025/ FEW CU DSNT N-S
DSNT HZ ALQDS WND LGT/ 8/130 56008
1 P.M.
Weather: Scattered altocumulus, few cumulus ENE-E
Temperature: 48F; Dew Point: 32F; Wind: SE at 5 kts,
Wind: Light
Sea-level pressure: 30.14 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 49F
6-hr Min temp: 32F
BHO SA 1755 120 SCT 70 208/48/32/1305/014/ FEW CU ENE-N WND LGT/
8/130 58037 10049 20032
SUMMARY FOR WEDNESDAY, NOVEMBER 8, 2017
TEMPERATURE (DEGREES F)
MAX…..43 NORMAL…..53
MIN…..34 NORMAL…..36
MEAN….39 NORMAL…..44
DEPARTURE FROM 30-YEAR NORMAL…………………….-5
TOTAL DEPARTURE FOR THE MONTH……………………+40 [+4.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..26 DEPARTURE………..5
TOTAL HEATING UNITS FOR THE MONTH………….116 DEPARTURE………-42
TOTAL HEATING UNITS FOR THE SEASON…………384 DEPARTURE……..-337
TOTAL HEATING UNITS LAST SEASON TO DATE…….561 DIFFERENCE…….-177
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 N AT 9:57 A.M.
AERO……………………23 N AT 9:58 A.M.
ASOS……………………29 NNE AT 9:59 A.M.
DAVIS…………………..25 NNE AT 9:59 A.M. RMY 27
FASTEST MILE FOR YESTERDAY…………………16 N AT 9:58 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 NNE AT 9:59 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 NNE AT 10:04 A.M.
AVERAGE WIND SPEED AND DIRECTION………….10.1 N
ASOS………………….11.0
DAVIS………………….9.5 NNE [026 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.25 DEPARTURE……-0.99
ASOS…………..0.24
TOTAL PRECIPITATION FOR THE YEAR……….48.05 DEPARTURE……+3.04
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/…/…/.. 26 NNW AERO 23 N RMY 26
11/8 43/34/39/-5/…/…/.. 26 N AERO 23 N RMY 27
11/9 Low temp since midnight is 31F; normal low is now 35F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR NOVEMBER 9
HIGH 72 IN 1975
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.2 IN 1921,1923
PEAK GUST 73e S IN 1943
RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
