Saturday, January 4, 2020

| January 4, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 4, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

MILD, BUT DAMP AND RAW AT THE OBSERVATORY TODAY….

Overcast skies has been the theme once again today with no
sunshine to speak of. Light rain and drizzle have been
occuring most of the day, but hasn’t amounted to too much.
0.07″ of rain has been measured through 1 P.M.

Wind has been quite light yet again today out of the east.

The low since midnight is 40F, 22 degrees above the normal
low of 18F. The high so far today is 46F, 12 degrees above
the daily normal maximum of 34F.

Today’s Observations:

7 A.M.
Weather: Overcast altostratus, few stratocumulus N-NE
Temperature: 46F; Dew Point: 37F; Wind: ENE at 6 kts
Sea-level pressure: 29.73 ins. Hg, falling, then rising
Visibility: 20 miles, hazy
6-hr Max temp: 46F
6-hr Min temp: 42F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E65 OVC 20 068/46/37/0706/973/ FEW SC N-NE
THN K LYR ALNG HRZN ALQDS WND LGT HAZY/ 8/55/ 55007 6000
70000 10046 20042

10 A.M.
Weather: Overcast stratus, light drizzle
Temperature: 44F; Dew Point: 41F; Wind: E at 4 kts
Sea-level pressure: 29.69 ins. Hg, rising, then falling
Visibility: 2 miles, fog
3-hr Precip:   Trace
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E25 OVC 2L-F 054/44/41/0904/969/ WND LGT/ 8/7//
58014 6000

1 P.M.
Weather: Vertical visibility 200 ft, sky obscurded, light rain
Temperature: 40F; Dew Point: 40F; Wind: E at 6 kts
Sea-level pressure: 29.58 ins. Hg, falling, then more slowly
Visibility: 1/16 miles, fog
6-hr Max temp: 40F
6-hr Min temp: 40F
6-hr Precip:  0.07 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 W2 X 1/16R-F 017/40/40/0806/958/ WND LGT/ 8/7//
56037 6007 10046 20040

SUMMARY FOR FRIDAY, JANUARY 3, 2020

TEMPERATURE (DEGREES F)
MAX…..46   NORMAL…..35
MIN…..40   NORMAL…..18
MEAN….43   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………+17
TOTAL DEPARTURE FOR THE MONTH…………………+35 [+11.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………22  DEPARTURE…….-17
TOTAL HEATING UNITS FOR THE MONTH……………80  DEPARTURE…….-35
TOTAL HEATING UNITS FOR THE SEASON…………2331  DEPARTURE…….-89
TOTAL HEATING UNITS LAST SEASON TO DATE…….2384  DEPARTURE…….-53

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 SW  AT 12:26 A.M.
                   AERO…………………….18 SW  AT 12:28 A.M.
                   ASOS…………………….23 SW  AT 12:26 A.M.
                   DAVIS……………………22 SW  AT 12:41 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….18 SW  AT 12:22 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 SSW AT 12:26 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 SW  AT 12:31 A.M.
AVERAGE WIND SPEED AND DIRECTION………….. 8.9 SW
                   ASOS………………….. 8.9
                   DAVIS…………………. 9.0 SW [235 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.14
                         ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH………Trace  DEPARTURE……-0.44
                         ASOS…………..0.01
TOTAL PRECIPITATION FOR THE YEAR……….Trace  DEPARTURE……-0.44
                         ASOS…………..0.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE…….-1.7
TOTAL SNOWFALL FOR THE SEASON…………..20.0  DEPARTURE…….+2.3

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  32/16/24/-13/…./5.8/011/02           33 ENE AERO 32 ENE RMY N/A
12/02  37/25/31/-5/…./2.7/000/00            52 NE  AERO 47 NE  RMY 53
12/03  30/23/27/-9/…./4.6/000/00            32 N   AERO 35 N   RMY 36
12/04  34/22/28/-7/…./0.0/000/00            23 WNW AERO 23 NNW RMY N/A
12/05  41/26/34/-1/…./0.0/343/62            33 NW  AERO 35 NW  RMY 37
12/06  33/23/28/-7/0.02/0.1/000/00            25 NW  AERO 23 NW  RMY 29
12/07  31/18/25/-9/0.00/0.0/519/94            25 NW  AERO 23 NW  RMY N/A
12/08  36/15/26/-8/0.00/0.0/402/73            31 SSW AERO 32 SSW RMY N/A
12/09  57/36/47/+13/…./0.0/000/00           53 S   AERO 52 S   RMY 54
12/10  58/37/48/+15/…./0.0/044/08           35 SW  AERO 39 SW  RMY N/A
12/11  36/23/30/-3/…./3.0/236/43            25 NW  AERO 25 NW  RMY N/A
12/12  29/17/23/-10/…./1.8/488/89           29 W   AERO 30 W   RMY 25
12/13  46/22/34/+2/…./0.0/000/00            25 SSE AERO 25 SSE RMY N/A
12/14  58/46/52/+20/…./0.0/000/00           45 S   AERO 41 S   RMY N/A
12/15  48/28/38/+6/0.00/0.0/284/52            53 W   AERO 53 W   RMY 50
12/16  30/25/28/-3/0.00/0.0/000/00            36 W   AERO 36 W   RMY N/A
12/17  35/23/29/-2/…./1.0/000/00            22 NNW AERO 21 NE  RMY 23
12/18  33/18/26/-5/…/0.0/229/42             44 WNW AERO 45 WNW RMY N/A
12/19  20/9/15/-15/…/0.0/534/98             51 W   AERO 47 W   RMY N/A
12/20  29/11/20/-10/0.00/0.0/540/99           32 W   AERO 30 W   RMY 29
12/21  31/16/24/-6/0.00/0.0/163/30            16 SSE AERO 15 SSE RMY N/A
12/22  40/26/33/+4/0.00/0.0/…./..           23 SW  AERO 21 SW  RMY 23
12/23  54/33/44/+15/0.00/0.0/…./..          30 WSW AERO 30 SW  RMY 30
12/24  42/29/36/+7/0.00/0.0/…./..           30 NW  AERO 27 NW  RMY 30
12/25  42/25/34/+6/0.00/0.0/…./..           16 NNE AERO 16 N   RMY N/A
12/26  39/29/34/+6/0.00/0.0/…./..           22 ENE AERO 20 ENE RMY 22
12/27  47/31/39/+11/0.00/0.0/…./..          32 SSW AERO 30 SSW RMY 34
12/28  47/30/39/+11/0.00/0.0/…./..          23 W   AERO 22 W   RMY N/A
12/29  42/28/35/+8/…./0.0/…./..           22 WNW AERO 21 WNW RMY 23
12/30  36/32/34/+7/…./0.8/…./..           40 E   AERO 37 E   RMY 37
12/31  40/32/36/+9/…./0.0/…./..           35 E   AERO 32 E   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  38/30/34/+7/…./0.0/…./..           39 W   AERO 38 W   RMY 41
01/02  46/29/38/+11/0.00/0.0/…./..          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/…./..          21 SW  AERO 18 SW  RMY N/A

01/04  The low since midnight is 40F, daily normal minimum is 18F

DAILY RECORDS FOR DECEMBER

12/01/19: DAILY RECORD SNOWFALL OF 5.8 INS.,
          BREAKS PREVIOUS RECORD OF 2.0 INS. SET IN 1902.

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

RECORDS FOR JANUARY 4
HIGH 60F IN 2000
LOW -8F IN 1904, 1981
PRECIP 1.79 INS. IN 1982
SNOW 16.5 INS. IN 2018
PEAK GUST 84 MPH S IN 1982

RECORDS FOR JANUARY 5
HIGH 61F IN 2007
LOW -9F IN 1981
PRECIP 1.15 INS. IN 2019
SNOW 4.5 INS. IN 1891
PEAK GUST 70 MPH WNW IN 1959

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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