Friday, January 3, 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
FRIDAY, JANUARY 3, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST, BUT CONTINUED MILD TEMPERATURES….

Overcast skies has been the theme today with no sunshine
to speak of thus far. Despite the cloud cover, temperatures
are rather mild reaching into the mid 40s. As a matter of
fact it never really cooled that much last night with the
overnight low of 40 degrees.

Wind has been quite light today, but generally out of a
southwesterly direction.

Visibility has been limited thanks in part to an inversion
that’s been in place all day. A thin smoke layer has been
observed all day thus far as well.

The low since midnight is 40F, 22 degrees above the normal
low of 18F. The high so far today is 46F, 11 degrees above
the daily normal maximum of 35F.

Today’s Observations:

7 A.M.
Weather: Overcast altocumulus/altostratus
Temperature: 42F; Dew Point: 30F; Wind: SW at 12 kts
Sea-level pressure: 29.79 ins. Hg, rising, then falling
Visibility: 35 miles
6-hr Max temp: 42F
6-hr Min temp: 40F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E110 OVC 35 088/42/30/2212/979/ FEW BINOVC DSNT
E THN K LYR ALQDS/ 8/07/ 50001 10042 20040

10 A.M.
Weather: Overcast altocumulus/altostratus
Temperature: 43F; Dew Point: 32F; Wind: SW at 8 kts
Sea-level pressure: 29.82 ins. Hg, rising unsteadily
Visibility: 50 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E110 OVC 50 099/43/32/2208/982/ THN K LYR ALNG
HRZN ALQDS/ 8/07/ 51011

1 P.M.
Weather: Overcast altostratus
Temperature: 45F; Dew Point: 34F; Wind: W at 3 kts
Sea-level pressure: 29.74 ins. Hg, falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 46F
6-hr Min temp: 41F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E100 OVC 50 070/45/34/2603/974/ THN K LYR ALNG
HRZN ALQDS WND LGT/ 8/05/ 58029 10046 20041

SUMMARY FOR THURSDAY, JANUARY 2, 2020

TEMPERATURE (DEGREES F)
MAX…..46   NORMAL…..35
MIN…..29   NORMAL…..19
MEAN….38   NORMAL…..27

DEPARTURE FROM 30-YEAR NORMAL…………………+11
TOTAL DEPARTURE FOR THE MONTH…………………+18 [+8.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………27  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH……………58  DEPARTURE…….-19
TOTAL HEATING UNITS FOR THE SEASON…………2309  DEPARTURE…….-72
TOTAL HEATING UNITS LAST SEASON TO DATE…….2354  DEPARTURE…….-45

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 SW  AT  7:16 P.M.
                   AERO…………………….28 SW  AT  7:28 P.M.
                   ASOS…………………….30 SW  AT  7:15 P.M.
                   DAVIS……………………28 SW  AT  7:13 P.M. RMY 30
FASTEST MILE FOR YESTERDAY………………….24 SSW AT  7:38 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 SSW AT  7:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 SW  AT  7:47 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.8 SW
                   ASOS…………………..13.2
                   DAVIS………………….12.8 SW [235 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
                         ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.44
                         ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR………..0.00  DEPARTURE……-0.44
                         ASOS…………..0.00

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…….+4.0

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  The low since midnight is 40F, daily normal minimum is 19F

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 3
HIGH 64F IN 2000
LOW -4F IN 1904
PRECIP 1.93 INS. IN 1999
SNOW 11.3 INS. 1996
PEAK GUST 92 MPH S IN 1960

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

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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