Tuesday, June 16, 2020

| June 16, 2020 | Reply

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

TUESDAY, JUNE 16, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

SUNSHINE AND GOOD VISIBILITY
ATOP GREAT BLUE HILL…

Scattered clouds in the morning clearing
as they day progressed with visibility
staying at 65 miles throughout the day.
Temperatures were in the mid to high 60s
during the observation period peaking at
73 degrees before the 1 P.M. observation.
The high so far today is 73 degrees, this
is 2 degrees below the daily normal high
of 75F. The low since midnight is 54F,
which is 3 degrees lower than the daily normal
low of 57F.

PRELIMINARY STATS FOR MAY 2020

TEMPERATURE, Deg. F
Avg. Max. 67.2 [+0.9]
Avg. Min. 45.8 [-2.0]
Mean      56.5 [-0.6]
24-hour corrected mean: 56.1
Max. for month: 84F on the 27th
Min. for month: 31F on the 10th

HEATING DEGREE DAYS
Total heating units:    291 [+21]
Total for the season:  5812 [-491]
Total for last season: 5432

COOLING DEGREE DAYS
Total cooling units:    32  [+10]
Total for the season:   32  [+8]
Total for last season:   8

PRECIPITATION, Inches
Total: 2.75 [-1.36]
Greatest in 24 hrs: 0.94 ins. on the 1st

SNOWFALL, Inches
Total: Trace
Greatest in 24 hrs: Trace on the 9th

WIND, mph
Avg. uncorrected wind speed: 12.3 mph
Avg. corrected wind speed:   12.7 mph
Prevailing wind direction:   W [16%]
Peak gust and direction:     52 W on the 9th

SUNSHINE:
Campbell-Stokes card minutes: 16248 minutes of possible 26226 or 62%
Astronomical total minutes: 16872 minutes of possible 27210 or 62%

Today’s Observations:

7 A.M.
Weather: Scattered Cirrus
Temperature: 63F; Dew Point: 51F; Relative Humidity: 66%
Wind: NNE at 7 kts
Sea-level pressure: 30.42 ins. Hg: steady, then rising
Visibility: 65 miles, distant haze
6-hr Max temp: 56F
6-hr Min temp: 54F
24-hr Precip:  0.00 ins
24-hr Snowfall: 0.0 ins.
BHO SA 1155 250 SCT 65 303/63/51/0207/042/ DSNT HZ ALQDS/
8/001 53008 10063 20054

10 A.M.
Weather: Scattered Cirrus, few Cumulus
Temperature: 70F; Dew Point: 51F; Relative Humidity: N/A
Wind: ENE at 10G15 kts
Sea-level pressure: 30.43 ins. Hg: rising, then steady
Visibility: 65 miles, distant haze
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 SCT 65 307/70/51/0610G15/043/
FEW CU DSNT HZ ALQDS/ 8/101 51004

1 P.M.
Weather: Few Cumulus, few Cirrus
Temperature: 71F; Dew Point: 47F; Relative Humidity: N/A
Wind: NE at 7 kts
Sea-level pressure: 30.42 ins. Hg: steady, then rising
Visibility: 65 miles
6-hr Max temp: 73F
6-hr Min temp: 63F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 65 303/71/47/0507/042/
FEW CU FEW CI DSNT HZ ALQDS/ 8/101 58004 10073 20063

SUMMARY FOR MONDAY, JUNE 15, 2020

TEMPERATURE (DEGREES F)
MAX…..67   NORMAL…..75
MIN…..53   NORMAL…..57
MEAN….60   NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL………………-6
TOTAL DEPARTURE FOR THE MONTH……………..+19 [+1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….5  DEPARTURE……. -2
TOTAL HEATING UNITS FOR THE MONTH……………39  DEPARTURE…….-15
TOTAL HEATING UNITS FOR THE SEASON…………5851  DEPARTURE……-505
TOTAL HEATING UNITS LAST SEASON TO DATE…….6252  DEPARTURE……-401

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 0  DEPARTURE……. -3
TOTAL COOLING UNITS FOR THE MONTH……………42  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON…………..74  DEPARTURE…….+13
TOTAL COOLING UNITS LAST SEASON TO DATE………31  DEPARTURE…….+43

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 NE  AT 10:08 A.M.
AERO…………………….16 ENE AT 11:02 A.M.
ASOS…………………….21 NE  AT  10:08 A.M.
DAVIS……………………21 ENE AT  10:00 A.M. RMY 20
FASTEST MILE FOR YESTERDAY………………….15 E   AT  2:36 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 ENE AT  2:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 NE  AT  12:01 A.M.
AVERAGE WIND SPEED AND DIRECTION……………7.6 NE
ASOS……………………8.2
DAVIS…………………..8.2 ENE [66 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.91  DEPARTURE……-0.52
ASOS…………..1.91
TOTAL PRECIPITATION FOR THE YEAR……….21.70  DEPARTURE……-3.39
ASOS………….22.22

PRELIMINARY CLIMATE SUMMARY FOR MAY 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

05/01  64/52/58/+5/0.94/0.0/000/00         46 SSE  AERO 44 SSE RMY N/A
05/02  70/42/56/+3/T/0.0/729/86            41 NW   AERO 40 NW  RMY N/A
05/03  78/55/67/+14/0.00/0.0/613/72        35 SSW  AERO 35 SSW RMY 36
05/04  72/45/59/+5/T/0.0/247/29            37 NW   AERO 40 WNW RMY 39
05/05  60/40/50/-4/0.00/0.0/821/96         31 NW   AERO 32 NW  RMY N/A
05/06  57/38/48/-6/T/0.0/498/58            24 ESE  AERO 22 ENE RMY 22
05/07  63/37/50/-5/0.00/0.0/576/67         30 WSW  AERO 29 WSW RMY N/A
05/08  57/40/49/-6/0.33/0.0/328/38         31 W    AERO 32 W   RMY N/A
05/09  44/32/38/-17/0.12/T/484/56          52 W    AERO 53 W   RMY 54
05/10  59/31/45/-10/0.00/0.0/763/88        46 W    AERO 46 W   RMY 49
05/11  65/43/54/-2/0.22/0.0/322/37         39 S    AERO 43 S   RMY 41
05/12  55/37/46/-10/0.00/0.0/801/92        37 W    AERO 37 W   RMY 37
05/13  59/32/46/-10/0.00/0.0/864/99        37 WNW  AERO 37 WNW RMY 38
05/14  70/40/55/-2/T/0.0/831/95            29 W    AERO 26 W   RMY 27
05/15  78/50/64/+7/0.82/0.0/535/61         40 WSW  AERO 40 WSW RMY 43 TSTM
05/16  69/47/58/+1/0.12/0.0/730/83         31 NW   AERO 31 NW  RMY 32
05/17  67/47/57/0/0.00/0.0/132/15          22 SSW  AERO N/A    RMY 21
05/18  60/47/54/-4/T/0.0/053/06            24 W    AERO 22 ENE RMY N/A
05/19  56/45/51/-7/0.00/0.0/797/90         35 ENE  AERO 34 ENE RMY 32
05/20  63/43/53/-5/0.00/0.0/869/98         22 ESE  AERO 20 SE  RMY 19
05/21  76/42/59/0/0.00/0.0/862/97          26 S    AERO 25 S   RMY 25
05/22  82/50/66/+7/0.00/0.0/864/97         29 W    AERO 29 W   RMY 28
05/23  67/44/56/-3/0.02/0.0/187/21         42 ENE  AERO 43 ENE RMY 40
05/24  58/43/51/-8/T/0.0/822/92            27 ENE  AERO 24 ENE RMY N/A
05/25  66/46/56/-4/0.02/0.0/072/08         18 ENE  AERO 18 ENE RMY N/A
05/26  82/56/69/+9/0.00/0.0/727/81         21 S    AERO 21 S   RMY 21
05/27  84/59/72/+12/0.00/0.0/728/81        31 SSW  AERO 31 SSW RMY 31
05/28  77/63/70/+9/0.02/0.0/027/03         33 SSW  AERO 33 S   RMY 33
05/29  78/66/72/+11/0.02/0.0/072/08        41 SSW  AERO 41 SSW RMY 43
05/30  79/63/71/+10/0.12/0.0/713/79        30 S    AERO 30 S   RMY N/A
05/31  67/45/56/-5/0.00/0.0/805/89         33 WNW  AERO 33 WNW RMY 32

DAILY RECORDS FOR MAY 2020

5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN
1914 AND 2005

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

06/01  64/42/53/-9/T/0.0/…/..            28 WNW  AERO 29 WNW RMY 28
06/02  72/45/59/-3/…./0.0/…/..         28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/0.0/…/..            29 W    AERO 28 W   RMY 26
06/04  87/62/75/+12/…./0.0/…/..        26 W    AERO 25 S   RMY N/A
06/05  80/65/73/+10/…./0.0/…/..        28 SSW  AERO 28 SSW RMY N/A TSTM
06/06  86/57/72/+9/…./0.0/…/..         55 SW   AERO 59 SW  RMY 59  TSTM
06/07  68/54/61/-3/0.00/0.0/…/..         24 NW   AERO 24 NW  RMY N/A
06/08  77/51/64/0/0.00/0.0/…/..          25 W    AERO 24 W   RMY 25
06/09  77/60/69/+5/T/…/..                23 E    AERO 21 E   RMY N/A
06/10  70/58/64/-1/T/0.0/…/..            25 E    AERO 24 E   RMY N/A
06/11  71/64/68/+3/0.62/0.0/…/..         40 S    AERO 40 S   RMY 42
06/12  82/63/73/+8/0.00/…/..             26 W    AERO 25 W   RMY 27
06/13  71/53/62/-3/0.00/…/..             21 WNW  AERO 20 WNW RMY N/A
06/14  67/49/58/-8/0.00/…/..             21 E    AERO 21 ENE RMY 21
06/15  67/53/60/-6/5/0/…/..              21 NE   AERO 16 ENE RMY 20

06/16 The low since midnight is 54F, the daily normal low is 57F

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

RECORDS FOR JUNE 16
HIGH 92F IN 1891, 1967
LOW 44F IN 1926
PRECIP 2.17 INS IN 1931
PEAK GUST 55 MPH W IN 1958

RECORDS FOR JUNE 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977

TODAY’S REPORT PREPARED BY: Nicholas Rousseau

Category: Daily Discussions

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