Monday, June 8, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 8, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

SUNNY, WARM, AND DRY WITH A WESTERLY BREEZE….

All in all not bad for the second week of June. Plenty of
sunshine today accompanied by a low dew point and a warm westerly
breeze. Visibility has been 50-60 miles with a bit of haziness
caused by pollen. Could actually see the clouds of pine
pollen coming off the trees this morning.

While the weather has been pleasant for outdoor activities,
it hasn’t been good in terms of the lack of rainfall. Thanks
to a heavy thunderstorm on Saturday, the monthly departure
recovered to the positive side, however for the year we’re
still running 2.75″ below normal. We’ll be watching this
closely as we move deeper into summer as the risk for drought
conditions could increase.

The high so far today is 75 degrees, this is 2 degrees above
the daily normal high of 73F. The low since midnight is 51F,
which is 4 degrees below the daily normal low of 55F.

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: N/A

SNOWFALL, Inches
Total: Trace
Greatest in 24 hrs: Trace

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: 15748 minutes of possible 26226 or 60%
Astronomical total minutes: 16360 minutes of possible 27210 or 60%

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus offshore distant E, few cirrus
all quadrants
Temperature: 60F; Dew Point: 49F; Relative Humidity: 67%
Wind: NW at 6 kts, wind light
Sea-level pressure: 29.91 ins. Hg: rising, then more slowly
Visibility: 50 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 15F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 50 156/60/49/3206/991/ FEW AC OFFSHR DSNT E
FEW CI ALQDS HAZY WND LGT/ 8/071 51016 10060 20051

10 A.M.
Weather: Scattered cumulus, thin scattered cirrus
Temperature: 70F; Dew Point: 43F; Relative Humidity: 37%
Wind: NNW at 8G17 kts
Sea-level pressure: 29.98 ins. Hg: rising, then falling
Visibility: 50 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 45 SCT 250 –SCT 50 151/70/43/3408G17/998/ HAZY/
8/201 58005

1 P.M.
Weather: Scattered cumulus, thin broken cirrus
Temperature: 74F; Dew Point: 43F; Relative Humidity: 32%
Wind: WNW at 9G20 kts
Sea-level pressure: 29.95 ins. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 75F
6-hr Min temp: 60F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 60 SCT 250 –BKN 60 142/74/43/3009G20/995/ 8/201
56009 10075 20060

SUMMARY FOR SUNDAY, JUNE 7, 2020

TEMPERATURE (DEGREES F)
MAX…..68   NORMAL…..73
MIN…..54   NORMAL…..55
MEAN….61   NORMAL…..64

DEPARTURE FROM 30-YEAR NORMAL……………..-3
TOTAL DEPARTURE FOR THE MONTH…………….+21 [+2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 4  DEPARTURE…….. 0
TOTAL HEATING UNITS FOR THE MONTH……………22  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………5834  DEPARTURE……-499
TOTAL HEATING UNITS LAST SEASON TO DATE…….6234  DEPARTURE……-400

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH……………27  DEPARTURE……..13
TOTAL COOLING UNITS FOR THE SEASON…………..59  DEPARTURE…….+21
TOTAL COOLING UNITS LAST SEASON TO DATE………21  DEPARTURE…….+38

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 NW  AT  8:11 A.M.
AERO…………………….24 NW  AT  7:18 A.M.
ASOS…………………….24 NW  AT  8:25 A.M.
DAVIS……………………23 WNW AT 12:06 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….18 NW  AT  1:43 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 NW  AT 12:07 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 NW  AT 12:07 A.M.
AVERAGE WIND SPEED AND DIRECTION………….. 9.1 NW
ASOS………………….. 8.7
DAVIS…………………. 9.4 NW [332 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.29  DEPARTURE……+0.12
ASOS…………..1.27
TOTAL PRECIPITATION FOR THE YEAR……….21.08  DEPARTURE……-2.75
ASOS………….21.58

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/…./0.0/000/00         46 SSE  AERO 44 SSE RMY N/A
05/02  70/42/56/+3/…./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/…./0.0/328/38         31 W    AERO 32 W   RMY N/A
05/09  44/32/38/-17/…./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/-2/0.00/0.0/831/95         29 W    AERO 26 W   RMY 27
05/15  78/50/64/+7/…./0.0/535/61         40 WSW  AERO 40 WSW RMY 43
05/16  69/47/58/+1/…./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/-4/0.00/0.0/072/08         18 ENE  AERO 18 ENE RMY N/A
05/26  82/56/69/+9/0.00/0.0/215/24         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/…./0.0/027/03         33 SSW  AERO 33 S   RMY 33
05/29  78/66/72/+11/…./0.0/072/08        41 SSW  AERO 41 SSW RMY 43
05/30  79/63/71/+10/…./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/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

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 The low since midnight is 51F, the daily normal low is 55F

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

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.53 INS IN 1947
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

RECORDS FOR JUNE 9
HIGH 94F IN 2008
LOW 40F IN 1980
PRECIP 2.08 INCHES IN 1931
PEAK GUST 67 MPH NW IN 1973

TODAY’S REPORT PREPARED BY: Matt Douglas