Sunday, November 10, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 10, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

SHOWERS EXIT EARLY THIS MORNING
MOSTLY CLOUDY WITH SEASONABLE TEMPERATURES THIS AFTERNOON

Some light rain fell during the very early hours of this morning, totaling
only 0.08 inches.  By 7:00, the showers had mostly moved offshore.  Clouds
have remain numerous throughout the day, however, with only occasional
sunshine observed.  Despite the lack of sun, the temperature has risen
to 52F by 1:00 this afternoon, which is equal to the average for today’s
date.  The morning low was an above average 40F.  The wind has again been
steady but fairly light today, rarely gusting past 20mph.  The wind
direction has been mainly S-SW, which has helped the warmer air move in
after the past two days were both below average.

This morning’s rainfall of 0.08 inches did little to help our growing
precipitation deficit, as we remain locked in a dry pattern with little
precipitation expected this week.  A yearly precipitation surplus that topped
5.50 inches in early September is now a deficit of over 1.50 inches, and this
deficit will likely continue to grow during the mostly dry conditions
expected for the next several days.

Today’s Observations:

7 A.M.
Weather: Light rain, broken nimbostratus, overcast altocumulus, few
stratocumulus NW, rain showers all quadrants
Temperature: 44F; Dew Point: 40F; Wind: S at 13 kts
Sea-level pressure: 29.89 ins. Hg, falling then falling more rapidly
Visibility: 40 miles
6-hr min temp: 40F
6-hr precip: 0.08 inches
24-hr precip: 0.08 inches
BHO SA 1155 E70 BKN 100 OVC 40R- 121/44/40/1813/989/ FEW SC NW SHRA ALQDS/
8/72/ 58014 MANUAL 60008 ASOS 60007 MANUAL 70008 ASOS 70007 10044 20040

10 A.M.
Weather: Scattered stratocumulus (few moderate tops NE), broken altocumulus,
few lower stratocumulus, rain showers/virga NE-SW and NW-N
Temperature: 49F; Dew Point: 41F; Wind: SSW at 9 kts
Sea-level pressure: 29.85 ins. Hg, falling then falling more rapidly
Visibility: 75 miles, light distant haze
3-hr precip: Trace
BHO SA 1455 60 SCT E95 BKN 35 107/49/41/2109/985/ FEW LWR SC FEW MDT TOPS NE
SHRA/VIRGA NE-SW AND NW-N/ 8/570 58014 MANUAL 6000/

1 P.M.
Weather: Broken stratocumulus, broken altocumulus, few lower stratocumulus,
few cumulus distant SSE-SSW
Temperature: 52F; Dew Point: 37F; Wind: Estimated WSW at 5 kts,
Wind: Light and variable
Sea-level pressure: 29.77 ins. Hg, falling then falling more slowly
Visibility: 45 miles
6-hr max temp: 52F
6-hr precip: Trace
BHO SA 1755 E60 BKN 90 BKN 45 082/52/37/E2405/977/ FEW LWR SC
FEW CU DSNT SSE-SSW WND LGT AND VRB/ 8/570 56025 6000/ 10052 20044

WEATHER SUMMARY FOR SATURDAY, NOVEMBER 9, 2013

TEMPERATURE (DEGREES F)
MAX…..44    NORMAL…..52
MIN…..29    NORMAL…..35
MEAN….37    NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL………………….-7
TOTAL DEPARTURE FOR THE MONTH………………….+6 [+0.5 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28  DEPARTURE………+7
TOTAL HEATING UNITS FOR THE MONTH………….178  DEPARTURE………-1
TOTAL HEATING UNITS FOR THE SEASON…………655  DEPARTURE……..-87
TOTAL HEATING UNITS LAST SEASON TO DATE…….628  DIFFERENCE…….+27

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25 WNW AT  12:59 P.M. *
AERO…………………..25 WNW AT  12:59 P.M. *
ASOS…………………..27 WNW AT  10:58 A.M.
DAVIS………………….27 WNW AT  12:59 P.M. RMY 29
FASTEST MILE FOR YESTERDAY………………..19 WNW AT  10:09 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20 WNW AT   1:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18 WNW AT  10:12 A.M.
AVERAGE WIND SPEED AND DIRECTION…………12.6 W
ASOS…………………13.0
DAVIS………………..11.2 W [262 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.08   DEPARTURE………….-0.08
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….0.55   DEPARTURE………….-0.85
ASOS…………..0.53
TOTAL PRECIPITATION FOR THE YEAR……….43.56   DEPARTURE………….-1.61
ASOS…………..N/A**
**ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..0.0    DEPARTURE…………..0.0
TOTAL SNOWFALL FOR THE MONTH………….Trace   DEPARTURE………….-0.3
TOTAL SNOWFALL FOR THE SEASON…………Trace   DEPARTURE………….-0.6

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

11/1  68/56/62/+16/0.10/012/02        60 SSW AERO N/A N/A    RMY 66
11/2  65/49/57/+11/0.00/296/48        22 WSW AERO N/A N/A    RMY 23
11/3  49/30/40/-6/0.06/135/22         23 N   AERO N/A N/A    RMY N/A
11/4  42/27/35/-10/0.00/588/96        24 NNE AERO N/A N/A    RMY 25
11/5  50/29/40/-5/0.00/487/80         16 SSW AERO N/A N/A    RMY 17
11/6  59/40/50/+5/0.00/419/69         30 SSW AERO 31 MPH SSW RMY 33
11/7  65/37/51/+6/0.31/079/13         33 SW  AERO 37 MPH SW  RMY 37
11/8  48/31/40/-4/T/…/..            37 WNW AERO 37 MPH WNW RMY 39
11/9  44/29/37/-7/0.00/…/..         25 WNW AERO 25 MPH WNW RMY 29

11/10 morning low temp: 40F; the normal low is now 35F

DAILY RECORDS FOR NOVEMBER 2013
None so far.

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: Jonathan O’Brien