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Monday, December 15, 2014

December 15, 2014

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, DECEMBER…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, DECEMBER 15, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES AND SEASONABLE TEMPERATURES
REMAIN IN PLACE

Yesterday’s maximum of 43F along with mostly
sunny skies continued the pattern of quiet, seasonable
conditions. At this morning’s 7:00 AM EST observation
an overnight low of 28F was recorded with light
frost on the ground and distant haze visible in
all directions. Winds were steady at 10 knots from
the NW.

By the 1:00 PM EST observation skies remained mostly
clear with generally hazy conditions. Visibility was
45 miles in all directions with a few cumulus to the
NE-SE just offshore. A maximum of 41F had been reached.

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant offshore ENE-SE,
few altocumulus distant SW-WNW, few cirrus distant SW-NW
Temperature: 29F; Dew Point: 28F; Wind: NW at 10 kts
Sea-level pressure: 29.99 ins. Hg, rising then more quickly
Visibility: 40 miles, light distant haze
6-hr max temp: 30F
6-hr min temp: 28F
24-hr precip:  0.00
24-hr snowfall: none
BHO SA 1155 CLR 40 156/29/28/3110/999/ FEW SC DSNT OFFSHR ENE-SE
FEW AC DSNT SW-WNW FEW CI DSNT SW-NW LGT DSNT HZ ALQDS/ 8/531
53013 10030 20028

10 A.M.
Weather: Scattered cirrus, few cumulus distant offshore
ENE-SE and distant W-NNW
Temperature: 35F; Dew Point: 28F; Wind: NW at 10 kts
Sea-level pressure: 30.05 ins. Hg, rising, then more slowly
Visibility: 45 miles, light distant haze
BHO SA 1455 250 SCT 45 175/35/28/3210/005/ FEW CU DSNT OFFSHR ENE-SE
AND DSNT W-NNW LGT DSNT HZ ALQDS/ 8/102 51019

1 P.M.
Weather: Clear, few cumulus distant NE-SE, few cirrus
distant in all directions
Temperature: 41F; Dew Point: 30F; Wind: estimated NNW at 2 kts,
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.04 ins. Hg, lower slightly
Visibility: 45 miles, light distant haze
6-hr max temp: 41F
6-hr min temp: 29F
BHO SA 1755 CLR 45 174/41/30/E3302/004/ FEW CU DSNT NE-SE
FEW CI DSNT ALQDS LGT DSNT HZ ALQDS WND LGT AND VRB/
8/101 56001 10041 20029

SUMMARY FOR SUNDAY, DECEMBER 14, 2014

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..40
MIN…..28   NORMAL…..24
MEAN….36   NORMAL…..32

DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH……………………+13 [+0.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..29  DEPARTURE………..+4
TOTAL HEATING UNITS FOR THE MONTH………….418  DEPARTURE……….-14
TOTAL HEATING UNITS FOR THE SEASON………..1577  DEPARTURE………-116
TOTAL HEATING UNITS LAST SEASON TO DATE……1693  DIFFERENCE……..-116

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………20 NW  AT  9:28 A.M.
ASOS…………………..20 NW  AT 10:08 A.M.
DAVIS………………….19 NW  AT  9:26 A.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..15 NW  AT 10:22 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15 NW  AT 10:30 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….14 WNW AT  9:20 A.M.
AVERAGE WIND SPEED AND DIRECTION…………10.7 NW
ASOS…………………11.2
DAVIS………………..9.1 NW [311 degrees)
* 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……….5.40  DEPARTURE…..+3.10
ASOS…………..5.54
TOTAL PRECIPITATION FOR THE YEAR……….53.16  DEPARTURE…..+2.33
ASOS………….53.73

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH…………….0.6  DEPARTURE……-4.3
TOTAL SNOWFALL FOR THE SEASON……………9.3  DEPARTURE……+1.8

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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

12/1  63/37/50/+13/0.01/0.0/…/..             28 WNW RMY 31
12/2  37/30/34/-2/0.10/T/000/00                26 E   RMY 29
12/3  49/34/42/+6/0.31/0.0/000/00              40 W   RMY 43
12/4  41/27/34/-1/…./0.0/…/..              29 WNW RMY N/A
12/5  42/23/33/-2/…./0.0/…/..              21 E   RMY 22
12/6  43/36/40/+5/…./0.0/000/00              25 NNW RMY N/A
12/7  36/18/27/-7/…./0.0/…/..              31 N   RMY 34
12/8  25/16/21/-13/0.01/0.1/000/00             24 N   RMY N/A
12/9  48/25/37/+3/3.23/0.0/000/00              48 ENE RMY 52
12/10 47/35/41/+8/0.43/0.0/000/00              35 NNE RMY 37
12/11 35/29/32/-1/0.05/0.5/000/00              27 SW  RMY 27
12/12 36/26/31/-2/0.00/0.0/…/..              23 WNW RMY 25
12/13 40/27/34/+2/0.00/0.0/…/..              28 NW  RMY 28
12/14 43/28/36/+4/0.00/0.0/…/..              20 NW  RMY 20

12/15 morning low temp: 28F since midnight; the normal low is now 24F

* 8TH–A tenth of an inch of snow estimated

DAILY RECORDS FOR DECEMBER 2014:

-DAILY PRECIPITATION RECORD FOR DECEMBER 9 2014
Old record of 1.51 inches set in 1952,
replaced with new record of 3.23 inches.

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

RECORDS FOR DECEMBER 15
HIGH 64 IN 1975
LOW 4 IN 1900, 1905, 1933
PRE 1.80 INS. IN 1981
SNOW 7.5 INS. IN 1951
PEAK GUST 65 MPH NW IN 1991

RECORDS FOR DECEMBER 16
HIGH 61 IN 1971
LOW -2 IN 1930
PRE 1.67 INS. IN 1960
SNOW 8.5 INS. IN 2007
WIND 73 MPH SSE IN 1982

TODAY’S REPORT PREPARED BY: Brian Fitzgerald

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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