Monday, January 10, 2022

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

MONDAY, JANUARY 10, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0713E
SUNSET:  1631E

BRISK AND COLD WITH A MIX OF SUN AND CLOUDS….

Cold and dry air has returned after a brief mild spell yesterday.
A little bit of light rain moved through the area last evening,
but only amounted to 0.01″.

Cold air advection took over last night with the temperature
dropping into the mid 20s by this morning. Despite a mix of sun
and clouds today, the temperature has only recovered to the
upper 20s this afternoon. A secondary arctic bourndary is however
approaching the area early this afternoon and promises to bring
renewed cold air advection tonight and through the day tomorrow.

The wind has been busy today averaging around 17mph with gusts
mainly in the 25-30mph range since this morning. However the peak
gust occurred back around 2am with a value of 44mph measured.

Visibility has been excellent today generally running 70-80 miles.

The high so far today was back at midnight which was 36F, which is
1 degree above the normal high of 35F. The low since midnight is
24F, which is 5 degrees above the normal low of 19F.

————————————————————–

PRELIMINARY STATS FOR DECEMBER 2021

TEMPERATURE, Deg. F
Avg. Max. 43.0 [+2.8] Avg. Min. 29.7 [+4.8] Mean      36.4 [+3.9] 24-hour corrected mean: 36.2
Max. for month: 62F on the 11th
Min. for month: 15F on the 20th

HEATING DEGREE DAYS
Total heating units:    879 [-127] Total for the season:  1886 [-324] Total for last season: 2210

PRECIPITATION, Inches
Total: 2.63 [-2.76] Greatest in 24 hrs: 0.91 inch on the 18-19th

SNOWFALL, Inches
Total: 1.7 ins. [-10.3] Greatest in 24 hrs: 1.2 ins. from the 8th-9th

WIND, mph
Avg. uncorrected wind speed: 11.6 mph
Avg. corrected wind speed:   12.1 mph
Prevailing wind direction:   WNW [14%] Peak gust and direction:     59 WNW on the 6th

SUNSHINE:
Campbell-Stokes card minutes: 5790 minutes of a possible 16470 or 35%
Astronomical total minutes: 5973 minutes of a possible 17037 or 35%

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus all quadrants, few altocumulus NE-SSE,
few cirrus all quadrants, virga SSE-S
Temperature: 25F; Dew Point: 12F; Relative Humidity: 57%
Wind: NW @ 14G24 kts, peak wind WNW 36 mph at 6:13 A.M.
Sea-level pressure: 1015.2 mb; 29.98 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 35F
6-hr Min temp: 25F
24-hr Precip:  0.01 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 2 ins.
BHO SA 1155 CLR 70 152/25/12/3114G24/998/ FEW SC ALQDS FEW AC NE-SSE
FEW CI ALQDS VIRGA SSE-S PK WND 3031/13/ 8/552 4/002 70001 10035 20025

10 A.M.
Weather: Scattered stratocumulus, scattered cirrus, virga distant SSW-WSW
Temperature: 26F; Dew Point: 6F; Relative Humidity: 42%
Wind: NW @ 15G26 kts, peak wind NW 30 mph at 9:49 A.M.
Sea-level pressure: 1017.9 mb; 30.06 in Hg; rising, then more slowly
Visibility: 80 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 44 SCT 250 SCT 80 179/26/6/3115G26/006/ VIRGA DSNT SSW-WSW
PK WND 3126/49/ 8/502 51027

1 P.M.
Weather: Broken stratocumulus, broken cirrus, virga distant SSW-WNW
Temperature: 29F, Dew point: 10F; Relative Humidity: 45%
Wind: WNW at 12G21 kts, peak wind WNW 30 mph at 12:22 P.M.
Sea-level pressure: 1015.9 mb; 30.00 in Hg; falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 29F
6-hr Min temp: 24F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 2 ins.
BHO SA 1755 E60 BKN 250 BKN 80 159/29/10/2912G21/000/ VIRGA DSNT SSW-WNW
PK WND 3026/22/ 8/502 4/002 58020 10029 20024

SUMMARY FOR SUNDAY, JANUARY 9, 2022

TEMPERATURE (DEGREES F)
MAX…….41     NORMAL…..35
MIN…….19     NORMAL…..19
MEAN……30     NORMAL…..27

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………. +3
TOTAL DEPARTURE FOR THE MONTH……………………….+24 [+2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………35  DEPARTURE……. -3
TOTAL HEATING UNITS FOR THE MONTH…………..311  DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………2197  DEPARTURE……-349
TOTAL HEATING UNITS LAST SEASON TO DATE…….2229  DEPARTURE…….-32

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….50 SW  @  2:34 P.M.
AEROVANE……………….51 SW  @  1:42 P.M.
VECTOR #2 (Instantaneous)..55     @  2:35 P.M.
DAVIS #2 ………………51 SW  @  2:35 P.M.
RMY #2 (Instantaneous)…..53 SW  @  2:34 P.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………39 SW  @  2:39 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..36     @  2:39 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………37 SW  @  2:39 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..37 SW  @  2:39 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……20.6 SSW [494 total miles] VECTOR #2…………….20.9
DAVIS #2……………..20.9 SW
RMY #2……………….21.1 SW
RMY #1…………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.01  DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH………….1.37  DEPARTURE…..+0.01
TOTAL PRECIPITATION FOR THE YEAR…………. 1.37  DEPARTURE…..+0.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………15.7  DEPARTURE…..+10.8
TOTAL SNOWFALL FOR THE SEASON (2021-2022)…..18.4  DEPARTURE……-1.6

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   44/30/37/0.00/0.0/263/47          35 W   AERO 35 W   RMY 34
12/02   58/35/47/10/T/0.0/106/19          56 WNW AERO 59 WNW RMY 62 TSTM
12/03   41/28/35/-1/0.00/0.0/512/92       46 NW  AERO 44 NW  RMY 46
12/04   39/25/32/-4/0.00/0.0/233/42       25 SW  AERO 23 SW  RMY 26
12/05   45/32/39/+3/0.00/0.0/460/83       25 SE  AERO 25 SE  RMY 25
12/06   59/37/48/+13/0.34/0.0/077/14      59 WNW AERO 59 NW  RMY 60
12/07   40/29/35/0/T/0.0/436/79           47 WNW AERO 36 WNW RMY 48
12/08   34/25/30/-5/0.05/0.6/000/00       26 NNE AERO 25 NE  RMY 26
12/09   35/20/28/-6/0.05/0.6/319/58       32 NW  AERO 30 NW  RMY 33
12/10   43/27/35/+1/0.00/0.0/000/00       21 SE  AERO 20 SE  RMY 21
12/11   62/37/50/+16/0.34/0.0/000/00      57 SSW AERO 59 SSW RMY 58
12/12   58/36/47/+13/0.05/0.0/416/76      55 WNW AERO 55 WNW RMY 58
12/13   50/35/43/+10/0.00/0.0/224/41      32 WSW AERO 33 WSW RMY 33
12/14   50/33/42/+9/0.00/0.0/442/81       31 WSW AERO 30 WSW RMY 32
12/15   42/28/35/+2/T/0.0/153/28          35 SSE AERO 35 SSE RMY 36
12/16   58/42/50/+18/0.21/0.0/016/03      35 SW  AERO 37 SW  RMY 38
12/17   56/39/48/+16/0.00/0.0/518/95      43 WNW AERO 41 WNW RMY 46
12/18   39/31/35/+3/0.52/0.2/000/00       21 NNW AERO 20 NNW RMY 20
12/19   39/20/30/-2/0.39/0.0/082/15       35 NNW AERO 37 NNW RMY 36
12/20   32/15/24/-7/0.00/0.0/528/97       29 SSW AERO 30 SSW RMY 30
12/21   40/27/34/+3/0.00/0.0/371/68       31 SW  AERO 32 SW  RMY 33
12/22   45/30/38/+7/0.10/0.0/038/07       47 NW  AERO 45 NW  RMY 47
12/23   30/21/26/-5/0.00/0.0/441/81       39 NW  AERO 38 NW  RMY 37
12/24   25/20/23/-7/0.01/0.1/000/00       14 N   AERO 13 N   RMY 14
12/25   34/25/30/0/0.34/0.0/000/00        20 NNW AERO 20 NNW RMY 18
12/26   37/30/34/+4/0.09/T/120/22         37 NW  AERO 37 NW  RMY 37
12/27   33/26/30/0/T/T/071/13             32 NW  AERO 35 NW  RMY 35
12/28   42/30/36/+7/0.06/0.1/147/27       34 NW  AERO 32 NW  RMY 35
12/29   40/32/36/+7/0.01/0.1/000/00       13 WSW AERO 12 WSW RMY 13
12/30   39/36/38/+9/0.04/0.0/000/00       11 N   AERO 13 SE  RMY 11
12/31   43/39/41/+12/0.03/0.0/000/00      17 S   AERO 16 S   RMY 18

DAILY RECORDS FOR DECEMBER 2021

12/16/21: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 42F
TIES PREVIOUS RECORD OF 42F SET IN 1982

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

1/1   51/43/47/+18/0.08/0.0/000/00        21 SSE AERO 21 SSE RMY 22
1/2   48/29/39/+11/0.29/0.0/000/00        35 NW  AERO 36 NW  RMY 35
1/3   29/18/24/-4/0.00/0.0/000/00         31 NNW AERO 30 N   RMY 30
1/4   30/12/21/-7/0.00/0.0/…/..         25 S   AERO 24 S   RMY 25
1/5   49/25/37/+9/0.21/0.0/…/..         45 S   AERO 48 S   RMY 47
1/6   40/27/34/+6/0.00/0.0/…/..         36 WNW AERO 36 WNW RMY 36
1/7   28/17/23/-4/0.78/15.7/…/..        39 WNW AERO 38 WNW RMY 39
1/8   26/11/19/-8/0.00/0.0/…/..         34 WNW AERO 32 WNW RMY 34
1/9   41/19/30/+3/0.01/T/…/..           50 SW  AERO 51 SW  RMY 53

1/10  The low since midnight is 24F, the daily normal low is 19F

DAILY RECORDS FOR JANUARY 2022

1/1/22: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 43F
SURPASSES PREVIOUS RECORD OF 42F SET IN 1966

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 2.74 INS. IN 1935
SNOWFALL 8.0 INS. IN 1896
PEAK GUST 73e SE IN 1977

RECORDS FOR JANUARY 11
HIGH 65F IN 2020
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: Matt Douglas