Tuesday, January 14, 2020

| January 14, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 14, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDY AND COOL THE THEME TODAY, OVERALL QUIET WEATHER….

Not much to talk about today, another day of light wind and cloudy
skies. A light onshore flow has allowed low cloud cover to
overspread the region, bringing yet another day with no sunshine
recorded.

The high for today is 38 degrees, this is 5 degrees above the
normal high of 33 degrees. The low since midnight is 31 degrees,
this is 14 degrees above the normal low of 17 degrees.

PRELIMINARY STATS FOR DECEMBER 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: Broken stratus fractus, overcast altostratus
Temperature: 33F; Dew Point: 32F; Wind: NW at 6 kts,
Sea-level pressure: 30.35 ins. Hg, rising, then falling
Visibility: 10 miles
6-hr Max temp: 33F
6-hr Min temp: 31F
24-hr Precip:  0.01 ins.
24-hr Snowfall: Trace.
BHO SA 1155 E70 BKN 180 OVC 10 278/33/32/3306/035/ THN F ALQDS
MOON DMLY VSBL WND LGT TOTAL NEW SNOW LAST 24HRS TRACE/ 8/07/
58002 70001 10033 20031

10 A.M.
Weather: Broken stratus fractus, broken altostratus, broken cirrostatus,
thin overcast cirrus
Temperature: 36F; Dew Point: 34F; Wind: NE at 5 kts,
Sea-level pressure: 30.36 ins. Hg, rising, then falling
Visibility: 10 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E7 BKN 70 BKN 200 BKN 250 –OVC 10 280/36/34/0505/036/
FEW BINOVC NW THN F ALQDS WND LGT/ 8/776 50002

1 P.M.
Weather: Overcast stratus
Temperature: 37F; Dew Point: 32F; Wind: SE at 4 kts,
Sea-level pressure: 30.27 ins. Hg, falling, then more rapidly
Visibility: 40 miles
6-hr Max temp: 38F
6-hr Min temp: 31F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E10 OVC 40 250/37/32/1204/027/ HAZY WND LGT/ 8/5//
58030 10038 20033

SUMMARY FOR MONDAY, JANUARY 13, 2020

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..34
MIN…..31   NORMAL…..17
MEAN….35   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………+10
TOTAL DEPARTURE FOR THE MONTH………………..+144 [+10.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………30  DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE MONTH…………..365  DEPARTURE……-143
TOTAL HEATING UNITS FOR THE SEASON…………2616  DEPARTURE……-196
TOTAL HEATING UNITS LAST SEASON TO DATE…….2758  DEPARTURE……-142

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 NE  AT 2:08 A.M.
AERO…………………….20 NE  AT 2:08 A.M.
ASOS…………………….22 NNE AT 2:08 A.M.
DAVIS……………………21 NE  AT 2:07 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….15 NE  AT 2:09 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 NE  AT 2:09 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 NE  AT 2:08 A.M.
AVERAGE WIND SPEED AND DIRECTION………….. 6.4 E
ASOS………………….. 6.7
DAVIS…………………. 6.8 ENE [070 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.13
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….0.45  DEPARTURE……-1.40
ASOS…………..0.99
TOTAL PRECIPITATION FOR THE YEAR………..0.45  DEPARTURE……-1.40
ASOS…………..0.99

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH…………….1.2  DEPARTURE…….-6.1
TOTAL SNOWFALL FOR THE SEASON…………..21.2  DEPARTURE…….-2.1

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  68/36/52/+27/…./0.0/…/..           60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/…/..             21 NE  AERO 20 NE  RMY N/A

01/14 The low since midnight is 31F, daily normal minimum is 17F

DAILY RECORDS FOR JANUARY

1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,
BREAKS PREVIOUS RECORD OF 60 SET IN 2018.
TIES HIGHEST MAXIMUM FOR JANUARY,
ADDITIONAL 68F ON 1/26/1950.

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

RECORDS FOR JANUARY 14
HIGH 65F IN 1995
LOW -12F IN 1914
PRECIP 1.45 INS. IN 2008
SNOWFALL 10.3 INS. IN 2008
PEAK GUST 68 MPH WNW IN 1976, S IN 2005

RECORDS FOR JANUARY 15
HIGH 64F IN 1995
LOW -16F IN 1957 [RECORD FOR MONTH]
PRECIP 2.63 INS. IN 1958
SNOWFALL 8.8 INS. IN 1983
PEAK GUST 69e MPH SE IN 1940

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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