Wednesday, January 15, 2020

| January 15, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 15, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

SUNSHINE AND MILD TEMPERATURES RETURN TODAY….

After a lot of clouds and fog around early this morning, drier
air worked it’s way into the area by late morning and early
afternoon delivering a rather pleasant day for January standards.
Plenty of sun has helped temperatures push into mid and upper 40s.

The dew point has been dropping this afternoon, now into the
upper 20s. This has helped to clear the air out considerably
with visibility this afternoon reaching 60 miles.

The high so far today is 48 degrees, this is 15 degrees above the
normal high of 33 degrees. The low since midnight is 35 degrees,
this is 18 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: Scattered stratus fractus, thin broken cirrus
Temperature: 37F; Dew Point: 36F; Wind: W at 11 kts,
Sea-level pressure: 30.06 ins. Hg, rising, then falling
Visibility: 15 miles
6-hr Max temp: 38F
6-hr Min temp: 34F
24-hr Precip:  0.01 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 1 SCT 250 –BKN 15 181/37/36/2711/006/ STRAFRA DRFTG OVR SMT
THN F ALQDS/ 8/701 50004 70001 10038 20034

10 A.M.
Weather: Clear, few stratocumulus SW-NW
Temperature: 42F; Dew Point: 35F; Wind: WNW at 11G19 kts,
Sea-level pressure: 30.11 ins. Hg, rising, then more slowly
Visibility: 30 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 30 197/42/35/2911G19/011/ FEW SC SW-NW HAZY/ 8/500 51016

1 P.M.
Weather: Broken stratocumulus
Temperature: 45F; Dew Point: 29F; Wind: W at 10G19 kts,
Sea-level pressure: 30.08 ins. Hg, falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 48F
6-hr Min temp: 37F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E40 BKN 60 187/45/29/2810G19/008/ 8/500 58010 10048 20037

SUMMARY FOR TUESDAY, JANUARY 14, 2020

TEMPERATURE (DEGREES F)
MAX…..38   NORMAL…..33
MIN…..31   NORMAL…..17
MEAN….35   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………+10
TOTAL DEPARTURE FOR THE MONTH………………..+154 [+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…………..395  DEPARTURE……-153
TOTAL HEATING UNITS FOR THE SEASON…………2646  DEPARTURE……-206
TOTAL HEATING UNITS LAST SEASON TO DATE…….2799  DEPARTURE……-153

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..16 W   AT  2:01 A.M.
AERO…………………….15 W   AT  2:01 A.M.
ASOS…………………….15 S   AT 11:44 P.M.
DAVIS……………………15 S   AT 11:43 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….12 S   AT 11:42 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….12 S   AT 11:54 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………11 W   AT  1:54 A.M.
AVERAGE WIND SPEED AND DIRECTION………….. 6.1 SSE
ASOS………………….. 6.6
DAVIS…………………. 6.7 SW [218 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.14
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….0.46  DEPARTURE……-1.54
ASOS…………..1.00
TOTAL PRECIPITATION FOR THE YEAR………..0.46  DEPARTURE……-1.54
ASOS…………..1.00

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……… 0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH…………… 1.2  DEPARTURE…….-6.7
TOTAL SNOWFALL FOR THE SEASON…………..21.2  DEPARTURE…….-2.7

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  38/31/35/+10/0.01/0.0/…/..           16 W   AERO 15 W   RMY N/A

01/15 The low since midnight is 35F, 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 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

RECORDS FOR JANUARY 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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