Tuesday, January 8, 2019

| January 8, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 8, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY DAY WITH FROZEN PRECIPITATION IN THE MORNING CHANGING TO LIGHT RAIN IN THE AFTERNOON….

Visibility decreased from 10 miles this morning to 1/16 mile due
to intensifying fog throughout the day. Light snow was observed
at 7 A.M., and light rain with ice pellets fell until around noon.
Light drizzle was seen for the remainder of the observation time.
Winds stayed southerly with speeds occasionally exceeding 20 mph.
The high temperature so far today is 38F, four degrees above the
daily normal maximum of 34F. The low since midnight is 24F, six
degrees above the normal minimum of 18F.

The year of 2018 has placed 3rd for the most annual
liquid precipitation, statistics are shown below.

BHO Greatest Annual Precipitation, inches (1886-2018):

1) 71.00 in 1998
2) 69.36 in 1996
3) 67.20 in 2018
4) 66.23 in 2005
5) 65.51 in 1972

Today’s Observations:

7 A.M.
Weather: Overcast nimbostratus, light snow
Temperature: 28F; Dew Point: 22F; Wind: SSE at 13G19 kts,
Sea-level pressure: 30.18 ins. Hg, falling, then more rapidly
Visibility: 10 miles, fog in all directions
6-hr Max temp: 28F
6-hr Min temp: 24F
24-hr Precip: Trace
24-hr snowfall: Trace
Snow depth: 0 ins.
BHO SA 1155 E45 OVC 10S- 219/28/22/1613G19/018/ DSNT FG ALQDS
S-CTD/ 8/02/ 56033 10028 20024

10 A.M.
Weather: Overcast nimbostratus, light rain, ice pellets,
partial obscuration due to fog
Temperature: 33F; Dew Point: 33F; Wind: S at 14G19 kts
Sea-level pressure: 30.12 ins. Hg, falling, then more rapidly
Visibility: 3 miles, except 5 miles E-NW
3-hr Precip: trace
BHO SA 1455 –X E5 OVC 3R-IPF 200/33/33/1714G19/012/ VSBY 5 E-NW
R-IP CTD/ 8/02/ 600// 56019

1 P.M.
Weather: Continued light drizzle and fog
Temperature: 38F; Dew Point: 38F; Wind: SSE at 12G16 kts
Sea-level pressure: 29.97 ins. Hg, falling rapidly
Visibility: 1/16 miles, fog
6-hr Max temp: 38F
6-hr Min temp: 27F
6-hr Precip: 0.01 ins.
6-hr snowfall: Trace
Snow depth: 0 ins.
BHO SA 1755 W3 X 1/16L-F 150/38/38/1612G16/997/ L- CTD/ 8//// 6001/
56050 10038 20027

SUMMARY FOR MONDAY, JANUARY 7, 2019

TEMPERATURE (DEGREES F)
MAX…..26   NORMAL…..34
MIN…..14   NORMAL…..18
MEAN….20   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL……………………-6
TOTAL DEPARTURE FOR THE MONTH…………………..+48 [+6.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..45   DEPARTURE………+6
TOTAL HEATING UNITS FOR THE MONTH………….223   DEPARTURE……..-48
TOTAL HEATING UNITS FOR THE SEASON………..2519   DEPARTURE……..-56
TOTAL HEATING UNITS LAST SEASON TO DATE……2507   DIFFERENCE…….+12

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..37 NW  AT 12:40 A.M.
AERO…………………….41 NW  AT  3:32 A.M.
ASOS…………………….41 NW  AT 12:45 A.M.
DAVIS……………………41 NNW AT 12:24 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….30 NW  AT 12:58 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….28 NW  AT 12:58 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………29 NW  AT 12:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.9 NW
ASOS…………………..10.7
DAVIS………………….11.1 NNW [312 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE…….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.01  DEPARTURE…….+1.01
ASOS…………..2.02
TOTAL PRECIPITATION FOR THE YEAR………..2.01  DEPARTURE…….+1.01
ASOS…………..2.02

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………..Trace  DEPARTURE……..-3.9
TOTAL SNOWFALL FOR THE SEASON……………7.7  DEPARTURE…….-12.2

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/01 41/28/35/-2/0.00/0.0/391/70          20 NNW AERO 18 NNW RMY N/A
12/02 52/35/44/+8/1.04/0.0/000/00          28 ESE AERO 25 ESE RMY 27
12/03 54/38/46/+10/0.00/0.0/178/32         35 W   AERO 35 W   RMY 38
12/04 38/23/31/-4/0.00/0.0/516/93          30 WNW AERO 31 WNW RMY 33
12/05 33/18/26/-9/0.00/0.0/432/78          16 NNW AERO 15 NNW RMY N/A
12/06 37/24/31/-4/0.00/0.0/354/64          29 W   AERO 28 W   RMY 30
12/07 37/21/29/-5/0.00/0.0/546/99          29 NW  AERO 29 NW  RMY 32
12/08 27/15/21/-13/0.00/0.0/518/94         28 NW  AERO 27 NW  RMY 29
12/09 34/17/26/-8/0.00/0.0/391/71          23 SSW AERO 21 SSW RMY 22
12/10 36/22/29/-4/0.00/0.0/544/99          24 NNW AERO 23 NNW RMY 22
12/11 36/17/27/-6/0.00/0.0/543/99          16 WSW AERO 14 WSW RMY N/A
12/12 35/18/27/-6/0.00/0.0/471/86          30 NW  AERO 29 NW  RMY M
12/13 31/16/24/-8/0.00/0.0/088/16          16 NNE AERO 12 SE  RMY N/A
12/14 46/28/37/+5/0.00/0.0/399/73          28 SSW AERO 28 SSW RMY 29
12/15 49/33/43/+11/0.06/0.0/000/00         28 NE  AERO 27 NE  RMY 30
12/16 40/37/39/+8/0.68/0.0/000/00          38 NE  AERO 38 NE  RMY 40
12/17 37/32/35/+4/0.15/0.0/000/00          39 NNE AERO 37 NNE RMY N/A
12/18 34/20/27/-4/0.02/0.1/469/86          48 NW  AERO 55 NW  RMY 48
12/19 38/17/28/-2/0.00/0.0/501/92          23 WNW AERO 23 WNW RMY N/A
12/20 47/30/39/+9/0.00/0.0/311/57          23 SW  AERO 22 SW  RMY N/A
12/21 62/43/53/+23/1.01/0.0/000/00         60 SSE AERO 62 SSE RMY 63
12/22 54/31/43/+14/0.01/0.0/109/20         41 W   AERO 45 W   RMY 43
12/23 38/27/33/+4/0.00/0.0/540/99  30 WNW AERO 32 WNW RMY N/A
12/24 34/27/31/+2/0.01/T/109/20            21 W   AERO 21 W   RMY N/A
12/25 35/23/29/+1/0.00/0.0/534/98          28 NW  AERO 28 NW  RMY 29
12/26 36/20/28/0/0.00/0.0/496/91           24 NW  AERO 24 NW  RMY 25
12/27 35/26/31/+3/0.00/0.0/508/93          23 NW  AERO 22 NW  RMY N/A
12/28 54/30/42/+14/0.42/0.0/000/00         44 SSW AERO M  M   RMY 47
12/29 54/30/42/+15/0.00/0.0/492/90         38 WNW AERO 38 WNW RMY 38
12/30 33/23/28/+1/0.00/0.0/334/61          24 NNW AERO 21 NNW RMY 17
12/31 41/28/35/+8/0.44/T/214/39            33 SSE AERO 32 SSE RMY N/A

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

01/01 54/29/42/+15/…./0.0/…/..         53 W   AERO 53 W   RMY 54
01/02 34/24/29/+2/…./…/…/..          22 NW  AERO 22 NW  RMY N/A
01/03 42/28/35/+9/0.01/T/…/..            28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/…./…/…/..         29 SW  AERO 29 SW  RMY 29
01/05 41/32/37/+11/1.19/…/…/..         26 NE  AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/…/..          42 NW  AERO 46 NW  RMY 50
01/07 26/14/20/-6/…/…/…/.. 37 NW  AERO 41 NW  RMY N/A

01/08 Low temp since midnight is 24F; normal low is 18F

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

RECORDS FOR JANUARY 8
HIGH 65F IN 2008
LOW -8F IN 1968
PRECIP 1.70 INS. IN 1958,1979
SNOWFALL 12.5 INS. IN 1996
PEAK GUST 77 MPH NNW IN 1958

RECORDS FOR JANUARY 9
HIGH 62F IN 1937
LOW -9F IN 1968
PRECIP 3.00 INS. IN 1956
SNOWFALL 10.0 INS. IN 1904
PEAK GUST 101e MPH SE IN 1978 [RECORD FOR MONTH]

TODAY’S REPORT PREPARED BY:  Benjamin Turner and Nick Rousseau

Category: Daily Discussions

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