Thursday, June 4, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 4, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A WARMER THAN NORMAL DAY WITH INCREASING
VISIBILITY AND CLOUD COVER….

We observed a visibility of 25 miles this
morning due to haze, with it increasing
to 65 miles as it dissipated. Cloud cover
was very little this morning, but increased
as pressure dropped slightly as the day went
on. Wind increased, with a peak gust of 28 mph
out of the southwest.

The high so far today is 86 degrees, this is 14
degrees above the daily normal high of 72F. The
low since midnight is 62F, which is 8 degrees
above the daily normal low of 54F.

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 69F; Dew Point: 60F; Relative Humidity: 73%
Wind: W at 8 kts
Sea-level pressure: 29.81 ins. Hg: rising steadily
Visibility: 25 miles, hazy
6-hr Max temp: 69F
6-hr Min temp: 62F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
BHO SA 1155 250 SCT 25 096/69/60/2808/981/ HAZY/ 8/002
53026 10069 20062

10 A.M.
Weather: Scattered cirrus, few cumulus
Temperature: 78F; Dew Point: 53F; Relative Humidity: 42%
Wind: SSW at 7 kts
Sea-level pressure: 29.76 ins. Hg: rising then falling
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 SCT 60 080/78/53/2207/976/ FEW CU ALQDS/
8/105 51016

1 P.M.
Weather: Broken cumulus and cirrostratus
Temperature: 85F; Dew Point: 52F; Relative Humidity: 33%
Wind: SW at 8G15 kts
Sea-level pressure: 29.75 ins. Hg: falling steadily
Visibility: 65 miles
6-hr Max temp: 86F
6-hr Min temp: 69F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E50 BKN 250 BKN 65 077/85/52/2608G15/975/ 8/105
58003 10086 20069

SUMMARY FOR WEDNESDAY, JUNE 3, 2020

TEMPERATURE (DEGREES F)
MAX…..72   NORMAL…..71
MIN…..45   NORMAL…..53
MEAN….59   NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL…………….. +5
TOTAL DEPARTURE FOR THE MONTH…………….. -7 [-2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH……………18  DEPARTURE……. +4
TOTAL HEATING UNITS FOR THE SEASON…………5830  DEPARTURE……-487
TOTAL HEATING UNITS LAST SEASON TO DATE…….6227  DEPARTURE……-397

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….2  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………… 2  DEPARTURE……. -3
TOTAL COOLING UNITS FOR THE SEASON…………..34  DEPARTURE……..+5
TOTAL COOLING UNITS LAST SEASON TO DATE……….8  DEPARTURE…….+26

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..29 W   AT  3:27 P.M.
AERO…………………….28 W   AT  3:27 P.M.
ASOS…………………….28 W   AT  3:25 P.M.
DAVIS……………………29 W   AT  3:25 P.M. RMY 26
FASTEST MILE FOR YESTERDAY………………….21 W   AT  3:14 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 W   AT  3:26 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 W   AT  3:14 P.M.
AVERAGE WIND SPEED AND DIRECTION……………. 9.0 WSW
ASOS……………………. 8.9
DAVIS…………………….9.2 WSW [250 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….Trace DEPARTURE……-0.16
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….0.01  DEPARTURE……-0.48
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE YEAR……….19.80  DEPARTURE……-3.35
ASOS………….20.32

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  72/45/59/-3/…./…/..             28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/…/..                29 W    AERO 28 W   RMY 26

06/04 The low since midnight is 62F, the daily normal low is 54F

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

RECORDS FOR JUNE 4
HIGH 99F IN 1919 [Record for month] LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007
PEAK GUST 48 MPH SSE IN 1983

RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

TODAY’S REPORT PREPARED BY: Benjamin Turner