Tuesday, November 10, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, NOVEMBER 10, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDS BUILD AHEAD OF OFFSHORE NOR’EASTER

An area of low pressure to our south this morning is
expected to deepen and strengthen as it passes to our
east. Scattered and broken layers of stratocumulus,
altocumulus and nearly overcast altostratus have characterized
our morning, with clear skies still visible to the NW-N.

Overnight, temperatures dipped to a minimum reading of 45F
at midnight, some 10 degrees above our daily normal minimum for
this date. Through Monday, temperatures have averaged 10.5
degrees above normal to start November.

By the 1:00 PM EST observation showers were building toward
the south shore of Massachusetts with overcast conditions
on top of Great Blue Hill. Thin fog and hazy conditions
were obscuring visibility to just 25 miles in most directions
with broken and overcast layers of altocumulus and altostratus
respectively. A maximum temperature of 53F had been recorded
around the 10:00 AM EST observation.

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altocumulus,
broken altostratus
Temperature: 48F; Dew Point: 37F; Wind: estimated WNW at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.26 ins. Hg, falling, then more slowly
Visibility: 30 miles, except 75 miles WNW-NNE, thin fog in
all directions
6-hr Max temp: 48F
6-hr Min temp: 46F
24-hr precip: 0.00 ins.
BHO SA 1155 30 SCT E140 BKN 200 BKN 30 247/48/37/E3005/026/
VSBY WNW-NNE 75 MI THN FG ALQDS WND LGT/ 8/52/ 56005 10048 20046

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus,
broken altostratus, sun dimly visible
Temperature: 53F; Dew Point 36F; Wind: estimated E at 3 kts,
Wind Speed: Light
Sea-level pressure: 30.26 ins. Hg, rising, then falling and lower
Visibility: 20 miles, except 65 miles WNW, thin fog, hazy
BHO SA 1455 25 SCT E120 BKN 200 BKN 20 246/53/36/E0803/026/
VSBY WNW 65 MI THN FG ALQDS HAZY SUN DMLY VSBL WND LGT/ 8/510 58001

1 P.M.
Weather: Broken altocumulus, overcast altostratus
Temperature: 49F; Dew Point 36F; Wind: NE at 7 kts
Sea-level pressure: 30.14 ins. Hg, falling, then more quickly
Visibility: 25 miles, except 50 miles WNW-NNW, thin fog, hazy
6-hr max. temp. 53F
6-hr min. temp. 48F
BHO SA 1755 E140 BKN 200 OVC 25 208/49/36/0507/014/
VSBY WNW-NNW 50 MI THN FG ALQDS HAZY/ 8/07/ 58038 10053 20048
SUMMARY FOR MONDAY, NOVEMBER 9, 2015

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..52
MIN…..38   NORMAL…..35
MEAN….49   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL………………….+5
TOTAL DEPARTURE FOR THE MONTH…………………+96  [+10.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..16   DEPARTURE……….-5
TOTAL HEATING UNITS FOR THE MONTH…………..84   DEPARTURE………-95
TOTAL HEATING UNITS FOR THE SEASON…………538   DEPARTURE……..-204
TOTAL HEATING UNITS LAST SEASON TO DATE…….605   DIFFERENCE……..-67

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20 W   AT  12:22 P.M. *
ASOS……………………21 WSW AT  12:01 P.M.
DAVIS…………………..20 W   AT   5:07 A.M. RMY 21
FASTEST MILE FOR YESTERDAY…………………16 W   AT  12:20 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 W   AT   2:37 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 W   AT  12:21 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5 W
ASOS………………….11.6
DAVIS…………………10.4 W [257 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……….TRACE  DEPARTURE…..-1.40
ASOS……………0.00
TOTAL PRECIPITATION FOR THE YEAR………..36.83  DEPARTURE…..-8.34
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

11/1  59/45/52/+6/T/…/..                  30 SSW RMY 31
11/2  62/47/55/+9/0.00/…/..               24 W   RMY N/A
11/3  71/44/58/+12/0.00/…/..              25 W   RMY 25
11/4  66/49/58/+13/0.00/…/..              22 SSW RMY N/A
11/5  72/51/62/+17/0.00/…/..              31 SW  RMY 36
11/6  71/60/66/+21/0.00/…/..              35 SSW RMY 38
11/7  64/46/55/+10/0.00/…/..              33 WNW RMY 35
11/8  54/39/47/+3/0.00/…/..               26 NW  RMY 30
11/9  59/38/49/+5/0.00/…/..               20 W   RMY 21

11/10  low since midnight is 45F; normal low is now 35F

DAILY RECORDS FOR NOVEMBER 2015

**11/6 DAILY RECORD MAXIMUM TEMPERATURE OF 71F
TIES PREVIOUS RECORD OF 71F SET IN 1959

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
BREAKS PREVIOUS RECORD OF 58F SET IN 1938

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
TIES PREVIOUS MONTHLY RECORD OF 60F SET ON
11/8/1996

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

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

RECORDS FOR NOVEMBER 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962

TODAY’S REPORT PREPARED BY: Brian Fitzgerald