Sunday, January 28, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 28, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE AVERAGE TEMPERATURES CONTINUE WITH SOME LIGHT RAIN

Winds continued to blow out of the southwest yesterday, keeping much warmer air
in the region. The temperature is challenging a new record high min with a low
since midnight of 44F.  The current record high minimum is 39 set in 1888 and tied
in 1924.

Some light rain began to fall this morning.  We received 0.06 inches of rain
this morning with only a Trace amount of additional precip falling after the 7
AM observation.  Skies were overcast to begin the day but began to clear slightly
during the late morning and afternoon.  Winds died down from yesterday and have
been generally light throughout the day.

Today’s Observations:

7 A.M.
Weather: Overcast Stratus
Temperature: 44F; Dew Point: 44F; Wind: WSW at 09 kts,
Sea-level pressure: 30.21 ins. Hg, falling then rising
Visibility: 15 miles, distant fog
6-hr Max temp: 50F
6-hr Min temp: 44F
24-hr precip: 0.06 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 70 OVC 15 231/44/44/2509/021/DSNT FG ALQDS/ 8/02/ 53017
MANUAL 70006 ASOS 70007 10050 20044

10 A.M.
Weather: Overcast Stratus, Few Stratus Fractus
dense cirrus NW-NE
Temperature: 45F; Dew Point: 45F; Wind: WSW at 6 kts,
Wind: Light
Sea-level pressure: 30.24 ins. Hg, rising, then more quickly
Visibility: 30 miles, distant fog
3-hr precip: 0.00 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 100 OVC 30 242/45/45/2406/024/ FEW STRFRA DSNT FG ALQDS WND LGT/
8/78/

1 P.M.
Weather: Scattered cumulus, Broken altocumulus, Overcast altocumulus,
Few Cumulus Fractus
Temperature: 47F; Dew Point: 41F; Wind: WSW at 8 kts,
Sea-level pressure: 30.20 ins. Hg, rising then falling
Visibility: 70 miles, except 30 SE-SW distant haze
6-hr Max temp: 47F
6-hr Min temp: 44F
6-hr precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 12 SCT E16 BKN 22 OVC/ 70 226/47/41/2508/020/ FEW CUFRA VSBY SE-SW 30
DSNT HZ SUN DMLY VSBL/ 8/79/ 58016 10047 20044

SUMMARY FOR SATURDAY, JANUARY 27, 2018

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..34
MIN…..24   NORMAL…..17
MEAN….38   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL………………………+13
TOTAL DEPARTURE FOR THE MONTH………………………+10 [0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….27   DEPARTURE………-13
TOTAL HEATING UNITS FOR THE MONTH………..1059   DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE SEASON……….3181   DEPARTURE……..-192
TOTAL HEATING UNITS LAST SEASON TO DATE…..2884   DIFFERENCE…….+287

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..43  SSW  AT  12:57 P.M.
AERO…………………….44  SSW  AT  12:57 P.M.***
ASOS…………………….45  SSW  AT  12:59 P.M.
DAVIS……………………45  M    AT  12:49 P.M.** RMY N/A
FASTEST MILE FOR YESTERDAY………………….M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….37  SSW  AT   1:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………35  M    AT   1:00 P.M.**
AVERAGE WIND SPEED AND DIRECTION…………..19.7* SSW
ASOS…………………..21.9
DAVIS………………….20.9
* Estimated
** Davis direction malfunctioning
*** Last of multiple occurances

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06  DEPARTURE……-0.07
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….5.58  DEPARTURE……+1.77
ASOS…………..6.14
TOTAL PRECIPITATION FOR THE YEAR………..5.58  DEPARTURE……+1.77
ASOS…………..6.14

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE MONTH……………19.3  DEPARTURE……..+4.2
TOTAL SNOWFALL FOR THE SEASON…………..28.6  DEPARTURE……..-2.5

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

1/01 11/-5/3/-24/0.00/0.0/538/98        30 NW  AERO 30 NW  RMY 31
1/02 15/-2/7/-20/0.00/0.0/402/73        26 W   AERO 25 W   RMY 26
1/03 28/11/20/-6/0.00/0.0/430/78        23 WSW AERO 20 WSW RMY N/A
1/04 28/18/23/-3/1.66/16.5/000/00       54 NNW AERO 60 NNW RMY 64
1/05 18/2/10/-16/0.00/0.0/431/78        53 W   AERO 53 W   RMY 57
1/06 10/-2/4/-22/0.00/0.0/554/100       43 WSW AERO 47 WSW RMY 47
1/07 14/-8/3/-23/0.00/0.0/549/99        37 WNW AERO 35 WNW RMY N/A
1/08 33/14/24/-2/0.02/T/006/01          40 S   AERO 40 S   RMY 42
1/09 40/25/33/+7/T/T/356/64             37 W   AERO 35 W   RMY 33
1/10 36/20/28/+3/0.00/0.0/553/99        30 W   AERO 30 W   RMY N/A
1/11 50/32/41/+16/0.00/0.0/056/10       33 S   AERO 32 S   RMY 34
1/12 60/45/53/+28/…./0.0/011/02       56 S   AERO 56 S   RMY 55
1/13 60/17/39/+14/…./0.0/265/47       58 SSW AERO 60 SSW RMY 62
1/14 21/11/16/-9/0.00/0.0/350/62        30 NW  AERO 30 NW  RMY N/A
1/15 18/11/15/-10/0.02/0.5/000/00       23 NNW AERO 21 N   RMY 23
1/16 31/18/25/0/0.00/0.0/153/27         17 SSE AERO 15 SSE RMY N/A
1/17 32/29/31/+6/0.23/2.3/…/00        20 SE  AERO 17 SE  RMY N/A
1/18 29/16/23/-2/0.00/0.0/…/..        24 NW  AERO 23 NW  RMY 26
1/19 34/17/26/+1/0.00/0.0/…/..        22 SSW AERO 20 SSW RMY N/A
1/20 45/27/36/+11/0.00/0.0/…/..       38 WSW AERO 37 WSW RMY 39
1/21 47/34/41/+16/0.00/0.0/…/..       22 W   AERO 21 W   RMY N/A
1/22 37/34/36/+11/…./0.0/000/00       21 E   AERO 16 E   RMY N/A
1/23 55/33/44/+19/…./0.0/000/00       53 S   AERO 58 S   RMY 57
1/24 37/22/30/+5/0.00/0.0/…/..        36 WNW AERO 35 WNW RMY 36
1/25 29/17/23/-2/0.00/0.0/…/..        35 WNW AERO 36 WNW RMY 41
1/26 32/15/24-1/0.00/0.0/…/..         28 WNW AERO 28 WNW RMY N/A
1/27 52/24/38/+13/…/0.0/…/..        43 SSW AERO 44 SSW RMY N/A

1/28 Low temp since midnight is 44F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2018

01/04/18: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.5 INS.
PREVIOUS RECORD WAS 8.6 INS. SET IN 1923 AND
TIED IN 1942

01/07/18: DAILY RECORD LOW MINIMUM TEMPERATURE OF -8F,
PREVIOUS RECORD OF -7F WAS SET IN 1896

01/12/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 45F,
PREVIOUS RECORD OF 42F WAS SET IN 2017

DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 60F,
PREVIOUS RECORD OF 59F WAS SET IN 2017

01/13/18: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 60F,
PREVIOUS RECORD OF 57F WAS SET IN 1890 AND
TIED IN 1932

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

RECORDS FOR JANUARY 28
HIGH 59F IN 1916
LOW -9F IN 1888, 1924
PRECIP 2.18 INS. IN 1897
SNOWFALL 15.0 INS. IN 1897
PEAK GUST 78e MPH SSE IN 1977

RECORDS FOR JANUARY 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973

TODAY’S REPORT PREPARED BY: Robert Millette