Sunday, January 25, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 25, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

5.0 INCHES OF SNOW AND 0.5 INCHES OF GLAZE RECORDED
ON TOP OF GREAT BLUE HILL, TEMPS NEVER REACH ABOVE
FREEZING ON SATURDAY

Snow that began early yesterday morning, transition to
freezing rain and drizzle by mid morning, finally ending
as fluffy snow by late in the evening. Storm total of 5.0
inches, with significant glaze ice accumulation of 0.5 inches.

Today periods of cloud and sun gave way to partly cloudy skies
this afternoon.  Temperatures which began in the mid 20s have
climbed into the mid 30s by the 1 o’clock observation.  The
humidity has been falling throughout the day from 100% to 64%
as of 1 o’clock.  Clouds are slowly beginning to build as
multiple layers of cloud cover now exist and will continue to
build throughout the day as a major storm approaches the area
for Monday.

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus
distant NE
Temperature: 29F; Dew Point: 27F; Wind: W at 14G20 kts
Sea-level pressure: 29.51 ins. Hg, decreasing then increasing
Visibility: 35 miles, except 20 Miles SW-WNW
6-hr max temp: 29F
6-hr min temp: 26F
24-hr precip: 0.66 in.
24 hr snowfall: 2.9 ins.
Total snow on ground: 5 inches
BHO SA 1155 CLR 35 992/29/27/2614G20/951/
VSBY SW-WNW 20 MI FEW SC ALQDS FEW CI DSNT NE
NEW SNW PST 24 HRS 2.9 IN STORM TOTAL 5.0 IN GLZ 0.5 IN/
8/501 53028 ASOS 60067 MANUAL 60066 10029 20026

10 A.M.
Weather: Clear, few cumulus fractus SW-NW
Temperature: 33F; Dew Point: 30F; Wind: WSW at 11G20 kts
Sea-level pressure: 29.59 ins. Hg, increasing then more slowly
Visibility: 60 miles
3-hr precip: 0.00 in.
3-hr snowfall 0.0 in.
BHO SA 1455 CLR 60 020/33/30/2511G20/959/
FEW CUFRA SW-NW FEW SC ALQDS/ 8/500 51028

1 P.M.
Weather: Scattered cumulus, scattered altocumulus, scattered cirrus
Temperature: 34F; Dew Point: 23F; Wind: W at 12G21 kts,
Sea-level pressure: 29.64 ins. Hg, increasing, then more slowly
Visibility: 90 miles
6-hr max. temp: 34F
6-hr min. temp: 28F
6-hr precip: 0.00
6-hr snowfall: 0.0
BHO SA 1755 40 SCT 120 SCT 250 SCT 90 036/34/23/2812G21/964/
PK WND 2726/04/ 8/531 51016 10034 20028

SUMMARY FOR SATURDAY, JANUARY 24, 2015

TEMPERATURE (DEGREES F)
MAX…..32   NORMAL…..34
MIN…..27   NORMAL…..17
MEAN….30   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………..+5
TOTAL DEPARTURE FOR THE MONTH…………………….-17 [-0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..35  DEPARTURE………..-5
TOTAL HEATING UNITS FOR THE MONTH………….966  DEPARTURE……….+17
TOTAL HEATING UNITS FOR THE SEASON………..3026  DEPARTURE………-227
TOTAL HEATING UNITS LAST SEASON TO DATE……3215  DIFFERENCE……..-189

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………24 SSW   AT  3:53 A.M.
ASOS…………………..28 NNW   AT  8:55 P.M.
DAVIS………………….23 SSW   AT  3:56 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..17 SSW   AT  3:52 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..21 WNW   AT 11:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….21 WNW   AT  3:56 A.M.
AVERAGE WIND SPEED AND DIRECTION…………10.8 SSW
ASOS…………………13.3
DAVIS………………..N/A
* last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.66  DEPARTURE…..+0.52
ASOS…………..0.67
TOTAL PRECIPITATION FOR THE MONTH……….2.60  DEPARTURE…..-0.80
ASOS…………..2.67
TOTAL PRECIPITATION FOR THE YEAR………..2.60  DEPARTURE…..-0.80
ASOS…………..2.67

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….2.9  DEPARTURE……+2.4
TOTAL SNOWFALL FOR THE MONTH…………….9.9  DEPARTURE……-3.4
TOTAL SNOWFALL FOR THE SEASON…………..20.9  DEPARTURE……-8.4

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

1/1  31/18/25/-2/0.00/0.0/544/99              29 SSW RMY 30
1/2  37/26/32/+5/0.00/0.0/314/57              35 WSW RMY 38
1/3  34/21/28/+2/0.67/2.5/017/03              25 SE  RMY 26
1/4  51/33/42/+16/0.48/0.0/000/00             30 SSW RMY N/A
1/5  46/13/30/+4/0.00/0.0/542/98              48 W   RMY 54
1/6  15/10/13/-13/0.02/0.4/000/00             29 W   RMY N/A
1/7  22/01/12/-14/0.01/0.3/383/69             43 WNW RMY 47
1/8  16/-5/6/-20/0.00/0.0/539/97              39 WNW RMY N/A
1/9  27/16/22/-4/0.08/0.9/201/36              35 WSW RMY 38
1/10 22/11/17/-8/0.00/0.0/541/97              26 WNW RMY 27
1/11 31/9/20/-5/45/0.00/0.0/123/22            26 SSW RMY N/A
1/12 36/31/34/+9/0.23/T/000/00                29 NNW RMY N/A
1/13 33/11/22/-3/0.00/0.0/524/93              30 NNW RMY 29
1/14 22/11/17/-8/T/T/000/00                   18 NNW RMY 16
1/15 27/20/24/-1/0.09/0.8/000/00              20 WSW RMY 22
1/16 35/12/24/-1/T/T/341/60                   46 WSW RMY 50
1/17 21/5/13/-12/0.00/0.0/558/98              30 WNW RMY N/A
1/18 50/19/35/+10/0.16/0.0/000/00             47 SE  RMY 52
1/19 44/28/36/+11/T/0.0/304/53                33 W   RMY 36
1/20 36/23/30/+5/0.00/0.0/495/86              28 W   RMY 28
1/21 30/17/24/-1/0.00/0.0/358/62             21 WNW RMY N/A
1/22 36/25/31/+6/T/T/…/..                   20 WNW RMY 20
1/23 36/18/27/+2/0.00/0.0/…/..              25 SSW RMY 26
1/24 32/27/30/+5/0.84/5.0/000/00              24 SSW RMY N/A

1/25 morning low temp: 26F since midnight; normal low is now 17F

DAILY RECORDS FOR JANUARY 2015
None so far.

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

RECORDS FOR JANUARY 25
HIGH 56F IN 2010
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972

RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978

TODAY’S REPORT PREPARED BY: Brian Fitzgerald