Saturday, January 28, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 28, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

WESTERLY WINDS GUSTING OVER 35 MPH, SKIES REMAIN MOSTLY CLOUDY

Low pressure to the north of the region is causing gusty,
westerly winds over 35 MPH this afternoon.  Skies have
remained mostly cloudy for most of the day with stratocumulus.
Despite cooler weather headed our way, temps are still above
normal with a max. at 1:00PM of 39F.

This has been a much warmer than normal January, averaging over
7 degrees above normal so far.  While a return to more seasonable
levels is expected in the next few days, there is a good chance
we will end up amongst the 10 warmest January’s on record at
Blue Hill.

BHO Warmest January Corrected Mean Temperatures, deg F (1885-2017)

1) 35.6 in 1913
2) 35.0 in 1932
3) 34.6 in 1937
4) 33.9 in 2006
5) 33.8 in 1933
33.8 in 1950
33.8 in 1990
8) 33.5 in 2002
9) 33.3 in 2017 (through 1/27)
10)32.1 in 1967
32.1 in 1995

Today’s Observations:

7 A.M.
Weather: Few cumulus NNE-SSW, scattered stratocumulus,
scattered cumulus
Temperature: 30F; Dew Point: 21F; Wind: WSW at 9 kts
Sea-level pressure: 29.52 ins. Hg, rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 33F
6-hr Min temp: 30F
24-hr precip: Trace
24-hr snowfall: Trace
BHO SA 1155 42 SCT 220 SCT 70 997/30/21/2409/952/ FEW CU NNE-SSW
NEW SNW PST 24 HRS TRACE/ 8/501 53019 10033 20030

10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 37F; Dew Point: 19F; Wind: WSW at 13G33 kts,
Peak Wind: 24 kts (28 MPH) WSW at 9:24AM
Sea-level pressure: 29.55 ins. Hg, rising then steady
Visibility: 90 miles, except 75 miles W-WNW
BHO SA 1455 42 SCT 250 SCT 70 007/37/19/2513G23/955/ PK WND 2524/34/
8/101 51010

1 P.M.
Weather: Few distant cumulus SE-S, broken stratocumulus
Temperature: 38F; Dew Point: 19F; Wind: W at 20G28 kts,
Peak Wind: 28 kts (32 MPH) W at 12:46 P.M.
Sea-level pressure: 29.53 ins. Hg, falling, then more quickly
Visibility: 50 miles
6-hr Max temp: 39F
6-hr Min temp: 30F
BHO SA 1755 E50 BKN 50 001/38/19/2820G28/953/ FEW DSNT CU SE-S
PK WND 2828/46/ 8/400 58006 10039 20030

SUMMARY FOR FRIDAY, JANUARY 27, 2017

TEMPERATURE (DEGREES F)
MAX…..42   NORMAL…..34
MIN…..33   NORMAL…..17
MEAN….38   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………..+13
TOTAL DEPARTURE FOR THE MONTH………………….+217 [+7.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..27   DEPARTURE………-13
TOTAL HEATING UNITS FOR THE MONTH………….852   DEPARTURE……..-216
TOTAL HEATING UNITS FOR THE SEASON………..2884   DEPARTURE……..-489
TOTAL HEATING UNITS LAST SEASON TO DATE……2630   DIFFERENCE…….+254

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….46 W   AT 11:44 A.M.
ASOS……………………48 WSW AT  2:19 P.M.
DAVIS…………………..46 WNW AT  2:18 P.M. RMY 50
FASTEST MILE FOR YESTERDAY…………………33 W   AT 11:45 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………33 W   AT  3:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..33 W   AT  1:28 P.M.
AVERAGE WIND SPEED AND DIRECTION………….19.5 WSW
ASOS………………….18.1
DAVIS…………………17.9 WNW [285 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE  DEPARTURE……-0.13
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE MONTH……….5.39  DEPARTURE……+1.58
ASOS…………..5.76
TOTAL PRECIPITATION FOR THE YEAR………..5.39  DEPARTURE……+1.58
ASOS…………..5.76

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH……………11.5  DEPARTURE…….-3.5
TOTAL SNOWFALL FOR THE SEASON…………..19.3  DEPARTURE……-11.7

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

1/1   41/29/35/+8/0.09/0.0/533/97           35 W   AERO 36 W   RMY 34
1/2   38/29/34/+7/0.00/0.0/011/02           21 E   AERO 20 E   RMY N/A
1/3   42/37/40/+14/1.14/0.0/000/00          39 ENE AERO 41 ENE RMY 34
1/4   44/30/37/+11/0.11/T/000/00            41 WNW AERO 46 WNW RMY 45
1/5   30/23/27/+1/0.00/0.0/343/62           37 W   AERO 39 W   RMY 38
1/6   30/20/25/-1/0.05/1.7/072/13           20 W   AERO 20 W   RMY N/A
1/7   22/14/18/-8/0.74/9.5/000/00           32 NNW AERO 39 NNW RMY 38
1/8   20/06/13/-13/0.01/T/512/92            26 NNW AERO 29 NNW RMY N/A
1/9   17/04/11/-15/0.00/0.0/335/60          23 SSW AERO 23 SSW RMY 25
1/10  41/14/28/+3/0.18/0.0/369/66           35 SE  AERO 37 SE  RMY N/A
1/11  53/40/47/+22/0.13/0.0/358/64          51 SSW AERO 48 SSW RMY 57
1/12  59/42/51/+26/0.15/0.0/118/21          37 SSW AERO 40 S   RMY 40
1/13  55/23/39/+14/0.00/0.0/535/95          39 WNW AERO 43 WNW RMY 42
1/14  30/14/22/-3/0.00/0.0/345/61           20 SSW AERO 20 SSW RMY 22
1/15  35/23/29/+4/0.00/0.0/555/98           28 NW  AERO 28 NW  RMY 28
1/16  40/22/31/+6/0.00/0.0/540/95           28 SW  AERO 25 SW  RMY 27
1/17  40/29/35/+10/0.27/T/257/45            23 E   AERO 23 E   RMY 25
1/18  38/31/30/+10/0.29/T/…/..            30 ENE AERO 29 ENE RMY 26
1/19  44/30/37/+12/T/T/…/..               21 NNW AERO 20 NNW RMY 20
1/20  40/30/35/+10/T/0.0/…/..             17 NNW AERO 17 NNW RMY N/A
1/21  54/35/45/+20/T/0.0/…/..             29 W   AERO 29 W   RMY 28
1/22  46/36/41/+16/0.14/T/…/..            31 ENE AERO 30 ENE RMY N/A
1/23  36/33/35/+10/0.48/0.3/…/..          56 NE  AERO 58 NE  RMY N/A
1/24  40/32/36/+11/1.48/0.0/…/..          62 NE  AERO 60 NE  RMY 60
1/25  42/32/37/+12/0.03/0.0/…/..          41 WNW AERO 40 WNW RMY 38
1/26  48/36/42/+17/0.10/0.0/…/..          40 W   AERO 44 W   RMY 41
1/27  42/33/38/+13/T/T/…/..               46 W   AERO 46 W   RMY 50

1/28 Low temp since midnight is 30F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2017

1/12/17: NEW DAILY RECORD HIGH MAXIMUM TEMP. OF 59F,
PREVIOUS RECORD WAS 57F SET 1913 AND TIED IN 1975
1/12/17: NEW DAILY RECORD HIGH MINIMUM TEMP. OF 42F,
PREVIOUS RECORD WAS 40F SET 2006

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: Cecilia Borries-Strigle and Kaitlin Gaegan