Friday, January 10, 2020

| January 10, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 10, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A MILDER, MOSTLY CLOUDY DAY WITH A WARM
BREEZE OUT OF THE SOUTHWEST….

Today we observed limited visibility due to a distant
haze, but we reached 60 miles at 10 A.M. observation.
Pressure gradually fell with increasing clouds, and skies
became completely overcast by noontime. Winds at 20 mph
on average have been coming in from the southwest,
advecting warmer air into the region.

The high temperature so far today is 44F, 10 degrees above
the daily normal maximum of 34F. The low since midnight
is 23F, which is 6 degrees above the normal low of 17F.

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: Scattered stratocumulus, broken altocumulus,
overcast cirrostratus
Temperature: 29F; Dew Point: 22F; Wind: SW at 18 kts,
Peak wind: 30 MPH (26 Kts) SW at 6:31 A.M.
Sea-level pressure: 30.55 ins. Hg, falling quickly
Visibility: 30 miles, distant haze
6-hr Max temp: 30F
6-hr Min temp: 23F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 30 SCT E180 BKN 250 OVC 30 345/29/22/2118/055/
DSNT HZ ALQDS PK WND 2126/31/ 8/477 56019 10030 20023

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus and
cirrostratus
Temperature: 39F; Dew Point: 33F; Wind: SW at 20G31 kts,
Peak wind: 36 MPH (31 kts) SW at 9:46
Sea-level pressure: 30.53 ins. Hg, rising then falling
Visibility: 60 miles, distant haze
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 30 SCT E180 BKN 250 BKN 60 337/39/33/2120G31/053/
DSNT HZ ALQDS PK WND 2131/46/ 8/479 56008

1 P.M.
Weather: Overcast stratus
Temperature: 44F; Dew Point: 40F; Wind: SW at 17G26 kts,
Peak wind: 36 MPH (31 kts) SW at 12:18 P.M.
Sea-level pressure: 30.44 ins. Hg, rising then falling
Visibility: 35 miles, distant fog
6-hr Max temp: 44F
6-hr Min temp: 29F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E30 OVC 35 309/44/40/2217G26/044/ DSNT FG
ALQDS PK WND 2231/18/ 8/6// 58028 10044 20029

SUMMARY FOR THURSDAY, JANUARY 9, 2020

TEMPERATURE (DEGREES F)
MAX…..28   NORMAL…..34
MIN…..16   NORMAL…..17
MEAN….22   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL………………… -4
TOTAL DEPARTURE FOR THE MONTH…………………+65 [+7.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………43  DEPARTURE……. +4
TOTAL HEATING UNITS FOR THE MONTH…………..284  DEPARTURE…….-65
TOTAL HEATING UNITS FOR THE SEASON…………2535  DEPARTURE……-119
TOTAL HEATING UNITS LAST SEASON TO DATE…….2579  DEPARTURE…….-44

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..43 WNW AT 12:18 A.M.
AERO…………………….40 WNW AT  1:10 A.M.
ASOS…………………….43 WNW AT 12:17 A.M.
DAVIS……………………44 W   AT 12:16 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….32 WNW AT 12:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….28 W   AT 12:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………31 W   AT 12:16 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.3 WNW
ASOS…………………..11.6
DAVIS………………….12.6 WNW [294 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.35  DEPARTURE……-0.93
ASOS…………..0.86
TOTAL PRECIPITATION FOR THE YEAR………..0.35  DEPARTURE……-0.93
ASOS…………..0.86

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…….-3.9
TOTAL SNOWFALL FOR THE SEASON…………..21.2  DEPARTURE…….+0.1

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  The low since midnight is 23F, daily normal minimum is 17F

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

RECORDS FOR JANUARY 10
HIGH 58F IN 2016
LOW -7F IN 2004
PRECIP 2.16 INS. IN 1935
SNOWFALL 6.3 INS. IN 1977
PEAK GUST 73e SE IN 1977

RECORDS FOR JANUARY 11
HIGH 59F IN 1975
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

Leave a Reply