Monday, January 30, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 30, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR AND SEASONABLE WINTER DAY

Temperatures are becoming more seasonable today with
a high of 33F by the 1pm ob. Normal highs for this
time of year are 34F. Visibility was clear and consistent
around 80 miles with mostly cloudy conditions all day.
Winds were light and out of the west.

This has been a much warmer than normal January, averaging 8F
above normal so far. While temperatures have returned to more
seasonable levels, there is a good chance we will end up amongst
the 10 warmest Januaries 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) 33.2 in 2017 (through 1/29)
10)32.1 in 1967
32.1 in 1995

Today’s Observations:

7 A.M.
Weather: Broken Stratocumulus
Temperature: 25F; Dew Point: 15F; Wind: W at 8 kts
Sea-level pressure: 29.74 ins. Hg, increasing then increasing more rapidly
Visibility: 80 miles
6-hr Max temp: 28F
6-hr Min temp: 23F
BHO SA 1155 E54 BKN 250 SCT 80 073/25/15/3008/974/
FEW DSNT CU NE AND E/ 8/501 53009 10028 20023

10 A.M.
Weather: Broken Stratocumulus
Temperature: 30F; Dew Point: 18F; Wind: W at 6 kts
Sea-level pressure: 29.75 ins. Hg, increasing then decreasing
Visibility: 80 miles
BHO SA 1455 E64 BKN 80 074/30/18/3006/975/ FEW DSNT CU WSW-NNW/ 8/500 50001

1 P.M.
Weather: Broken Stratocumulus
Temperature: 31F; Dew Point: 16F; Wind: W at 6 kts
Sea-level pressure: 29.72 ins. Hg, decreasing then steady
Visibility: 80 miles
6-hr Max temp: 33F
6-hr Min temp: 24F
BHO SA 1755 E54 BKN 80 063/31/16/2806/972/ FEW SCSL E-SSE
8/400 58011 10033 20024

SUMMARY FOR SUNDAY, JANUARY 29, 2017

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..34
MIN…..28   NORMAL…..17
MEAN….34   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………+9
TOTAL DEPARTURE FOR THE MONTH………………….+238 [+8.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..31   DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE MONTH………….914   DEPARTURE……..-233
TOTAL HEATING UNITS FOR THE SEASON………..2946   DEPARTURE……..-506
TOTAL HEATING UNITS LAST SEASON TO DATE……2692   DIFFERENCE…….+254

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29 WSW AT  1:31 P.M.
ASOS……………………30 W   AT  1:30 P.M.
DAVIS…………………..30 WNW AT  1:29 P.M. RMY 32
FASTEST MILE FOR YESTERDAY…………………20 WSW AT  1:50 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 W   AT  1:51 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..20 WNW AT  1:51 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.1 WSW
ASOS………………….11.1
DAVIS…………………10.0 W [275 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….5.39  DEPARTURE……+1.31
ASOS…………..5.76
TOTAL PRECIPITATION FOR THE YEAR………..5.39  DEPARTURE……+1.31
ASOS…………..5.76

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH……………11.5  DEPARTURE…….-4.6
TOTAL SNOWFALL FOR THE SEASON…………..19.3  DEPARTURE……-12.8

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  38/29/34/+9/0.00/0.0/…/..           36 WNW AERO 40 WNW RMY 43
1/29  39/28/34/+9/0.00/0.0/…/..           29 WSW AERO 29 WSW RMY 32

1/30 Low temp since midnight is 23F; 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 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962

RECORDS FOR JANUARY 31
HIGH 58F IN 1913, 1947, 2013
LOW -12F IN 1920
PRECIP 1.03 INS. IN 1914
SNOWFALL 9.0 INS. IN 1898
PEAK GUST 75 MPH NW IN 1974

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Kaitlin Geagan