Sunday, January 12, 2020

| January 12, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 12, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM AND WINDY WITH EXCELLENT VISIBILITY IN THE
AFTERNOON….

The main story here today is, again, the wind and temperatures.
A strong southwest wind is moving unseasonably warm air into the
region. The high so far today is 67F which will break the old
record of 60 degrees set in 2018. The records broken yesterday
were the maximum temperature and the high minimum temperature:
The daily record maximum temperature is now 65F, replacing the
60F set in 1975. The daily record high minimum temperature is
now 46F, breaking the previous record of 40F; set in 1983.

Wind has not let up since yesterday, but has shifted from southwest
to west following the last bit of rainfall. The max gust so far today
is 59 mph, seen around 5 A.M. Overnight rain amounted to 0.08 inches,
with an additional 0.01 inches falling after the 7 A.M. observation.
After the fog cleared early this morning, visibility rose to an
exceptional 85 miles by noontime.

PRELIMINARY STATS FOR NOVEMBER 2019

TEMPERATURE, Deg. F
Avg. Max. 39.1 [0.0]
Avg. Min. 25.0 [+1.4]
Mean      32.1 [+0.8]
24-hour corrected mean: 32.3
Max. for month: 58F on the 10th
Min. for month: 9F on the 19th

HEATING DEGREE DAYS
Total heating units:   1014 [-29]
Total for the season:  2251 [-54]
Total for last season: 2295

PRECIPITATION, Inches
Total: 7.81 [+2.92]
Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 19.9 [+6.5]
Greatest in 24 hrs: 5.8 ins. on the 1st-2nd

WIND, mph
Avg. uncorrected wind speed: 13.2 mph
Avg. corrected wind speed:   13.6 mph
Prevailing wind direction:   W [20%]
Peak gust and direction:     53 S,W on the 9th, 15th

SUNSHINE:
Campbell-Stokes card minutes: 6168 minutes of possible 16470 or 37%
Astronomical total minutes: 6368 minutes of possible 17000 or 37%

Today’s Observations:

7 A.M.
Weather: Light rain
Temperature: 59F; Dew Point: 59F; Wind: SSW at 24G41 kts,
Peak wind: 59 MPH (51 kts) SSW at 5:59 A.M.
Sea-level pressure: 29.78 ins. Hg, rising rapidly
Visibility: 3 miles, fog
6-hr Max temp: 61F
6-hr Min temp: 59F
24-hr Precip:  0.08 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E15 OVC 3F 086/59/59/2124G41/978/ R-CTD PK WND 1949/1059/
8/6// 70008 53031 10061 20059

10 A.M.
Weather: Scattered stratus fractus, broken altocumulus and
cirrus
Temperature: 61F; Dew Point: 59F; Wind: SSW at 22G41 kts,
Peak wind: 50 MPH (43 kts) SSW at 9:11 A.M.
Sea-level pressure: 29.79 ins. Hg, rising, then more slowly
Visibility: 75 miles, except 40 miles ENE-S
3-hr Precip:  0.01 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 15 SCT E100 BKN 250 BKN 75 980/61/59/2222G41/979/ VSBY 40
MI ENE-S PK WND 2143/11/ 8/762 6002/ 53002

1 P.M.
Weather: Scattered cirrostratus, few cumulus
Temperature: 66F; Dew Point: 48F; Wind: W at 19G28 kts,
Peak wind: 39 MPH (34 kts) W at 12:06 P.M.
Sea-level pressure: 29.82 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 67F
6-hr Min temp: 59F
6-hr Precip:  0.01 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 250 SCT 85 989/66/48/2719G28/982/ FEW CU ALQDS PK WND
2334/06/ 8/108 6001/ 53009 10067 20059

SUMMARY FOR SATURDAY, JANUARY 11, 2020

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..34
MIN…..46   NORMAL…..17
MEAN….56   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………+31
TOTAL DEPARTURE FOR THE MONTH………………..+107 [+9.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….9  DEPARTURE…….+31
TOTAL HEATING UNITS FOR THE MONTH…………..322  DEPARTURE……-106
TOTAL HEATING UNITS FOR THE SEASON…………2573  DEPARTURE……-160
TOTAL HEATING UNITS LAST SEASON TO DATE…….2664  DEPARTURE…….-91

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..53 SSW AT 2:38 P.M.
                   AERO…………………….53 SSW AT 2:39 P.M.
                   ASOS…………………….56 SW  AT 2:39 P.M.
                   DAVIS……………………53 SSW AT 2:37 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….40 SSW AT 2:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….38 SW  AT 2:24 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………37 SSW AT 2:23 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..23.5 SSW
                   ASOS…………………..22.7
                   DAVIS………………….21.8 SW [211 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.08  DEPARTURE……-0.06
                         ASOS…………..0.10
TOTAL PRECIPITATION FOR THE MONTH……….0.43  DEPARTURE……-1.13
                         ASOS…………..0.96
TOTAL PRECIPITATION FOR THE YEAR………..0.43  DEPARTURE……-1.13
                         ASOS…………..0.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH…………….1.2  DEPARTURE…….-5.0
TOTAL SNOWFALL FOR THE SEASON…………..21.2  DEPARTURE…….-1.0

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/+4/0.00/0.0/212/39            23 SW  AERO 21 SW  RMY 23
12/23  54/33/44/+15/0.00/0.0/540/99           30 WSW AERO 30 SW  RMY 30
12/24  42/29/36/+7/0.00/0.0/507/93            30 NW  AERO 27 NW  RMY 30
12/25  42/25/34/+6/0.00/0.0/289/53            16 NNE AERO 16 N   RMY N/A
12/26  39/29/34/+6/0.00/0.0/174/32            22 ENE AERO 20 ENE RMY 22
12/27  47/31/39/+11/0.00/0.0/000/00           32 SSW AERO 30 SSW RMY 34
12/28  47/30/39/+11/0.00/0.0/470/86           23 W   AERO 22 W   RMY N/A
12/29  42/28/35/+8/…./0.0/383/70            22 WNW AERO 21 WNW RMY 23
12/30  36/32/34/+7/…./0.8/000/00            40 E   AERO 37 E   RMY 37
12/31  40/32/36/+9/…./0.0/000/00            35 E   AERO 32 E   RMY N/A    

DAILY RECORDS FOR DECEMBER

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

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  46/36/41/+15/…./0.0/…./..          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/…./0.5/…./..           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/…./..                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/…./0.4/…/..            30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/…./0.4/…/..            50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/…./0.0/…/..            43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/11/T/0.0/…/..               37 SW  AERO 37 SW  RMY 39
01/11  65/46/56/+31/…./0.0/…/..           53 SSW AERO 53 SSW RMY N/A          

01/12 The low since midnight is 59F, daily normal minimum is 17F

DAILY RECORDS FOR JANUARY

1/11/19: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
          BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
          BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

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

RECORDS FOR JANUARY 12
HIGH 60F IN 2018
LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980

RECORDS FOR JANUARY 13
HIGH 60F IN 2018
LOW -10F IN 1912,1914
PRECIP 1.54 INS. IN 1979
SNOWFALL 12.6 INS. IN 1964
PEAK GUST 74 MPH NE IN 1964

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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