Sunday, June 3, 2018

| June 3, 2018 |

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 3, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

A DRY, COOLER THAN NORMAL DAY WITH THE SKY CLEARING
AROUND NOONTIME….

Air became drier throughout the day, bringing the humidity from 72%
this morning to 57% this afternoon. Visibility stayed at a maximum of
40 miles so far today, due to a distant haze. Temperatures stayed cooler
than normal, due to a moderate wind from the east. By the 1 P.M. observation,
the temperature had reached a maximum of 59F. This is 11 degrees under the
daily normal maximum of 71F. The low since midnight was 54F, a degree under
the normal minimum of 53F.

PRELIMINARY STATS FOR MAY 2018

TEMPERATURE, Deg. F
Avg. Max. 72.2 [+5.9]
Avg. Min. 51.3 [+3.5]
Mean      61.8 [+4.7]
24-hour corrected mean: 61.0
Max. for month: 90F on 3rd
Min. for month: 39F on 1st

HEATING DEGREE DAYS
Total heating units:   154 [-114]
Total for the season:  5847 [-456]
Total for last season: 5662

COOLING DEGREE DAYS
Total cooling units:   62 [+40]
Total for the season:  62 [+38]
Total for last season: 56

PRECIPITATION, Inches
Total: 2.00 ins. [-2.11]
Greatest in 24 hrs: 0.74 ins. on 15th

SNOWFALL, Inches
Total: 0.0 ins. [-0.0]

WIND, mph
Avg. uncorrected wind speed: 10.3
Avg. corrected wind speed: 10.8
Prevailing wind direction: SSW at 14%
Peak gust and direction: 51 NW on 15th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

Today’s Observations:

7 A.M.
Weather: Broken cumulus
Temperature: 57F; Dew Point: 48F; Wind: E at 11G18 kts
Sea-level pressure: 30.09 ins. Hg, rising, then more rapidly
Visibility: 40 miles, thin smoke layer in all directions
6-hr Max temp: 57F
6-hr Min temp: 52F
24-hr Precip: Trace
BHO SA 1155 E20 BKN 40 190/57/48/0811G18/009/ THN K LYR ALQDS/
8/200 53017 10057 20052

10 A.M.
Weather: Broken stratocumulus
Temperature: 57F; Dew Point: 44F; Wind: E at 10G22 kts
Sea-level pressure: 30.11 ins. Hg, rising, then more slowly
Visibility: 30 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 E30 BKN 30 195/57/44/0810G22/011/ DSNT HZ ALQDS/ 8/400 51005

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 58F; Dew Point: 43F; Wind: E at 13G18 kts
Sea-level pressure: 30.09 ins. Hg, rising then falling
Visibility: 40 miles, distant haze
6-hr Max temp: 59F
6-hr Min temp: 55F
6-hr precip: 0.00 ins.
BHO SA 1755 35 SCT 250 SCT 40 189/58/43/0713G18/009/ DSNT HZ ALQDS/
8/107 58006 10059 20055

SUMMARY FOR SATURDAY, JUNE 2, 2018

TEMPERATURE (DEGREES F)
MAX…..79   NORMAL…..71
MIN…..54   NORMAL…..53
MEAN….67   NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL…………………..+5
TOTAL DEPARTURE FOR THE MONTH…………………..+13 [+7.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-5
TOTAL HEATING UNITS FOR THE MONTH…………..0   DEPARTURE……….-10
TOTAL HEATING UNITS FOR THE SEASON……….5847   DEPARTURE………-465
TOTAL HEATING UNITS LAST SEASON TO DATE…..5667   DIFFERENCE……..+180

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH……………7   DEPARTURE……….+4
TOTAL COOLING UNITS FOR THE SEASON………….69   DEPARTURE………+42
TOTAL COOLING UNITS LAST SEASON TO DATE……..58   DEPARTURE………+11

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..26 ENE AT 10:17 A.M.*
AERO…………………….26 ENE AT 10:17 A.M.
ASOS…………………….29 NE  AT 10:08 A.M.
DAVIS……………………27 M   AT 10:08 A.M.** RMY 27
FASTEST MILE FOR YESTERDAY………………….23 ENE AT 10:18 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….23 ENE AT 10:18 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 M   AT 10:18 A.M.**
AVERAGE WIND SPEED AND DIRECTION……………10.4 E
ASOS……………………11.5
DAVIS…………………..10.2
* Last of several occurrences
** Davis direction malfunctioning

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.33
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….27.31  DEPARTURE……+4.50
ASOS………….28.87

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

5/01 65/39/52/-1/0.00/0.0/625/74    25 WNW AERO 21 WNW RMY 25
5/02 88/59/74/+21/0.00/0.0/584/69   37 WSW AERO 29 WSW RMY 35
5/03 90/67/79/+26/0.13/0.0/433/51   36 SW  AERO 32 WSW RMY 36
5/04 84/67/74/+20/0.05/0.0/102/12   39 SSW AERO 37 SSW RMY N/A
5/05 73/54/64/+10/0.00/0.0/615/72   56 W   AERO 55 W   RMY N/A
5/06 65/48/57/+3/0.21/0.0/000/00    24 NE  AERO 18 NE  RMY 21
5/07 62/49/56/+1/0.00/0.0/713/83    26 ENE AERO 22 NE  RMY 24
5/08 73/46/60/+5/0.00/0.0/852/99    25 SSE AERO 21 ESE RMY 23
5/09 74/48/61/+6/0.00/0.0/768/89    23 ESE AERO 18 ESE RMY 21
5/10 73/48/61/+6/0.03/0.0/355/41    33 S   AERO 30 S   RMY 32
5/11 70/51/61/+5/0.00/0.0/703/81    26 WNW AERO 24 NW  RMY 28
5/12 51/47/49/-7/0.19/0.0/000/00    25 E   AERO 23 E   RMY N/A
5/13 58/46/52/-4/T/0.0/392/45       20 S   AERO 17 S   RMY 16
5/14 73/47/60/+3/T/0.0/551/63       23 S   AERO 18 S   RMY 21
5/15 83/54/69/+12/0.74/0.0/333/38   51 NW  AERO 50 NW  RMY 54 TSTM
5/16 56/49/53/-4/T/0.0/272/31       32 ENE AERO 28 ENE RMY 30
5/17 72/51/62/+5/0.02/0.0/000/00    17 SW  AERO 14 SW  RMY N/A
5/18 62/43/53/-5/0.00/0.0/467/53    35 ENE AERO 33 ENE RMY N/A
5/19 57/43/50/-8/…/0.0/133/15     22 E   AERO 17 E   RMY N/A
5/20 77/54/66/+8/…/0.0/000/00     33 SW  AERO 31 SW  RMY 33 TSTM
5/21 75/52/64/+5/0.00/0.0/861/97    22 W   AERO 18 W   RMY 20
5/22 68/51/60/+1/0.04/0.0/071/08    23 SSW AERO 21 S   RMY 22
5/23 82/51/67/+8/0.06/0.0/…/..    33 NNW AERO 33 NNW RMY 34 TSTM
5/24 74/50/62/+3/0.00/0.0/…/..    28 SSW AERO 25 SSW RMY 27
5/25 86/50/68/+8/0.00/0.0/…/..    40 W   AERO 39 W   RMY 43
5/26 88/61/75/+15/…./0.0/…/..   38 ENE AERO 38 ENE RMY 39
5/27 61/47/54/-6/…./0.0/…/..    32 ENE AERO 30 ENE RMY N/A
5/28 60/48/54/-7/…./0.0/…/..    23 S   AERO 21 S   RMY N/A
5/29 85/56/71/+10/0.00/0.0/…/..   23 WSW AERO 23 WSW RMY N/A
5/30 72/59/66/+5/0.00/0.0/…/..    21 S   AERO 20 S   RMY 21
5/31 81/54/68/+7/0.00/0.0/…/..    28 S   AERO 28 S   RMY 29

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

6/1 78/62/70/+8/T/…/..            21 S   AERO 21 S   RMY N/A
6/2 79/54/67/+5/0.00/0.0/…/..     26 ENE AERO 25 ENE RMY 27

6/3 Low temp since midnight is 52F; normal low is now 53F

DAILY RECORDS FOR MAY 2018

5/03/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 67F,
BREAKS PREVIOUS RECORD OF 66F SET IN 2001

5/04/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 67F,
BREAKS PREVIOUS RECORD OF 66F SET IN 2001

DAILY RECORDS FOR JUNE 2018

None so far.

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

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

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

 

Category: Daily Discussions

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