Tuesday, June 2, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 2, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A MIX OF SUN AND CLOUDS TODAY WITH WARMER TEMPERATURES…

A few light rain showers moved through last evening
bringing only a trace of rain to the hill. Otherwise
continued dry weather has been the dominant theme.
The yearly precipitation departure is currently at
3.05 inches below normal.

A mix of sun and clouds has been the theme again today
with warmer temperatures and a mainly light breeze out
of varying directions. The air isn’t as dry as yesterday
however with dew points ranging from the upper 30s early
this morning to the mid 40s early this afternoon.

Visibility has been very good for this time of year
starting the day at 70 miles, but has slipped a bit to
60 miles this afternoon, likely due to a bit more moisture
in the air compared to yesterday.

The high so far today is 69 degrees, this is 2 degrees
below the daily normal high of 71F. The low since midnight
is 45F, which is 8 degrees below the daily normal low
of 53F.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus/altocumulus castellanus,
thin broken cirrus
Temperature: 53F; Dew Point: 39F; Relative Humidity: 58%
Wind: E at 2 kts, wind light and variable
Sea-level pressure: 30.06 ins. Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 53F
6-hr Min temp: 45F
24-hr Precip: Trace
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E75 BKN 250 –BKN 70 179/53/39/0902/006/ WND L/V/
8/081 50001 70000 10053 20045

10 A.M.
Weather: Broken altocumulus, thin broken cirrus
Temperature: 62F; Dew Point: 40F; Relative Humidity: 45%
Wind: S at 3 kts, wind light and variable
Sea-level pressure: 30.01 ins. Hg: falling, then more rapidly
Visibility: 70 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E100 BKN 250 –BKN 70 162/62/40/1903/001/ FEW CU N-NNE
AND SE-SSE WND L/V/ 8/291 58017

1 P.M.
Weather: Scattered cumulus, broken altocumulus, thin broken
cirrus, altocumulus standing lenticular all quadrants
Temperature: 69F; Dew Point: 45F; Relative Humidity: 41%
Wind: WSW at 10G17 kts, wind SSW variable W
Sea-level pressure: 29.93 ins. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 69F
6-hr Min temp: 53F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 60 SCT E110 BKN 250 –BKN 60 135/69/45/2510G17/993/
ACSL ALQDS WND 21V28/ 8/241 58027 10069 20053

SUMMARY FOR MONDAY, JUNE 1, 2020

TEMPERATURE (DEGREES F)
MAX…..64   NORMAL…..71
MIN…..42   NORMAL…..53
MEAN….53   NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL…………….. -9
TOTAL DEPARTURE FOR THE MONTH…………….. -9 [-9.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………12  DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH………….. 12  DEPARTURE……. +7
TOTAL HEATING UNITS FOR THE SEASON…………5824  DEPARTURE……-484
TOTAL HEATING UNITS LAST SEASON TO DATE…….6220  DEPARTURE……-396

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH…………… 0  DEPARTURE……. -2
TOTAL COOLING UNITS FOR THE SEASON…………..32  DEPARTURE……..+6
TOTAL COOLING UNITS LAST SEASON TO DATE……….8  DEPARTURE…….+24

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 WNW AT  6:46 P.M.
AERO…………………….29 WNW AT  6:46 P.M.
ASOS…………………….27 WNW AT  6:44 P.M.
DAVIS……………………29 WNW AT 12:47 P.M. RMY 28
FASTEST MILE FOR YESTERDAY………………….21 WNW AT 12:42 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 WNW AT  8:42 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 W   AT 12:48 P.M.
AVERAGE WIND SPEED AND DIRECTION……………. 9.7 WNW
ASOS……………………. 9.8
DAVIS……………………10.1 WNW [301 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH………TRACE  DEPARTURE……-0.33
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….19.79  DEPARTURE……-3.05
ASOS………….20.31

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/…/..         18 ENE  AERO 18 ENE RMY N/A
05/26  82/56/69/+9/0.00/0.0/…/..         21 S    AERO 21 S   RMY 21
05/27  84/59/72/+12/0.00/0.0/…/..        31 SSW  AERO 31 SSW RMY 31
05/28  77/63/70/+9/…./0.0/…/..         33 SSW  AERO 33 S   RMY 33
05/29  78/66/72/+11/…./…/…/..        41 SSW  AERO 41 SSW RMY 43
05/30  79/63/71/+10/…./…/…/..        30 S    AERO 30 S   RMY N/A
05/31  67/45/56/-5/0.00/0.0/…/..         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 The low since midnight is 45F, the daily normal low is 53F

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

RECORDS FOR JUNE 2
HIGH 91F IN 1895
LOW 41F IN 1907, 1929
PRECIP 2.36 INS IN 1982
SNOWFALL TRACE IN 1907 (IP)
PEAK GUST 63 MPH NW IN 2000

RECORDS FOR JUNE 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998

TODAY’S REPORT PREPARED BY: Matt Douglas