Friday, June 2, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 2, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY BUT SEASONABLE DAY

Clouds increased throughout the day with only a few cirrus visible in
the morning and then cumulus and stratocumulus were covering most of the
sky by the 1:00 PM observation. High of the day was 70F by 1:00 PM this
is close to the normal of 71F.

Winds were light yesterday until an afternoon downpour which let 0.06 inches
at Great Blue Hill. With the downpour came out peak wind of the day at 39 MPH.
This was around 3:30 PM yesterday. Winds have picked up today starting light
at 7:00 AM then picking up through out the day with a peak wind of 32 MPH by
1:00 PM. Humidity decreased all day and was a low 36% at 1:00 PM.

PRELIMINARY STATS FOR MAY 2017

TEMPERATURE, Deg. F
Avg. Max. 63.5 [-2.8] Avg. Min. 47.1 [-0.7] Mean      55.3 [-1.8] 24-hour corrected mean: 54.9
Max. for month: 96F on 18th
Min. for month: 36F on  9th

HEATING DEGREE DAYS
Total heating units: 329 [+61] Total for the season: 5662 [-641] Total for last season: 5248

PRECIPITATION, Inches
Total: 4.53 [+0.42] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 0.0
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.6
Avg. corrected wind speed: 11.1
Prevailing wind direction: S at 14%
Peak gust and direction: 46 SSE on 6th

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

Today’s Observations:

7 A.M.
Weather: Few cirrus in all directions
Temperature: 57F; Dew Point: 40F; Wind: W at 6 kts,
Wind speed: Light
Sea-level pressure: 29.96 ins. Hg, rising then falling
Visibility: 80 miles
6-hr Max temp: 57F
6-hr Min temp: 50F
24-hr precip: 0.06 in.
BHO SA 1155 CLR 80 145/57/40/2706/996/ FEW CI ALQDS WND LGT/
8/001 50006 MANUAL 70006 ASOS 70007 10057 20050

10 A.M.
Weather: Scattered cumulus
Temperature: 67F; Dew Point: 44F; Wind: WNW at 14G26 kts
Sea-level pressure: 29.93 ins. Hg, falling, then more quickly
Visibility: 70 miles
BHO SA 1455 60 SCT 70 137/67/44/2914G26/993/ PK WND 2826/48/ 8/100
56008

1 P.M.
Weather: Broken Stratocumulus
Temperature: 67F; Dew Point: 39F; Wind: W at 16G25 kts
Sea-level pressure: 29.88 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 70F
6-hr Min temp: 57F
BHO SA 1755 60 BKN 70 121/67/39/2716G25/988/ PK WND 2726/57/ 8/400
57016 10070 20057

SUMMARY FOR THURSDAY, JUNE 1, 2017

TEMPERATURE (DEGREES F)
MAX…..78   NORMAL…..71
MIN…..55   NORMAL…..53
MEAN….67   NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL……………………..5
TOTAL DEPARTURE FOR THE MONTH…………………….+5 [+4.8 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……….-5
TOTAL HEATING UNITS FOR THE SEASON………..5662   DEPARTURE……..-646
TOTAL HEATING UNITS LAST SEASON TO DATE……5250   DIFFERENCE…….+412

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….39  NW AT 3:26 P.M.
AERO……………………39  NW AT 3:27 P.M.
ASOS……………………42  W  AT 3:28 P.M.
DAVIS…………………..38  W  AT 3:27 P.M. RMY 41
FASTEST MILE FOR YESTERDAY…………………30  NW AT 3:27 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………29  W  AT 3:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..29  W  AT 3:27 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.1  WSW
ASOS………………….10.3
DAVIS………………….9.6  W  [257 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06  DEPARTURE……-0.11
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….0.06  DEPARTURE……-0.11
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE YEAR……….25.40  DEPARTURE……+2.57
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR MAY 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

5/1  50/43/47/-6/T/034/04                  21 N   AERO 18 N   RMY 22
5/2  65/42/54/+1/0.26/136/16               41 W   AERO 44 W   RMY 43
5/3  52/42/53/0/0.00/595/70                37 WNW*AERO 39 WNW RMY 40
5/4  65/40/53/-1/0.00/724/85               23 S   AERO 23 S   RMY 24
5/5  51/44/48/-6/0.73/000/00               28 E   AERO 28 E   RMY N/A
5/6  65/50/58/+4/0.23/094/11               46 SSE AERO 48 SSE RMY 49
5/7  63/47/55/0/T/670/78                   35 S   AERO 38 S   RMY 39
5/8  54/38/46/-9/T/224/26                  29 WSW AERO 29 WSW RMY 32
5/9  53/36/45/-10/T/251/29                 20 ESE AERO 17 ESE RMY 19
5/10 57/42/50/-5/0.00/225/26               17 NNE AERO 16 NW  RMY N/A
5/11 58/45/52/-4/0.00/443/51               23 NE* AERO 23 NE  RMY 23
5/12 57/41/49/-7/0.01/453/52               21 NE  AERO 20 NE  RMY 19
5/13 57/41/49/-7/0.19/009/01               24 ENE AERO 24 E   RMY N/A
5/14 47/43/45/-12/1.49/000/00              33 NNE AERO 36 N   RMY 36
5/15 58/43/51/-6/0.24/018/02               36 NNW AERO 40 NNW RMY 41
5/16 79/51/65/+8/0.00/870/99               26 WNW AREO 26 WNW RMY 29
5/17 90/60/75/+18/T/775/88                 32 SSE AERO 33 SW* RMY 34
5/18 96/69/83/+25/0.01/830/94              39 WNW AERO 41 WNW RMY 42 TSTM
5/19 89/56/73/+15/T/814/92                 35 W   AERO 33 W   RMY 37
5/20 67/49/58/0/0.00/709/80                23 NE  AERO 22 NE  RMY 21
5/21 66/45/56/-3/0.00/773/87               21 E   AERO 20 S   RMY 21
5/22 53/48/51/-8/0.18/000/00               22 S   AERO 22 S   RMY 23
5/23 70/51/61/+2/0.01/366/41               21 NNW AERO 18 NNW RMY 19
5/24 65/53/59/0/0.00/116/13                17 E   AERO 16 E   RMY N/A
5/25 53/49/51/-9/0.66/000/00               36 E   AERO 38 E   RMY N/A TSTM
5/26 56/46/51/-9/0.44/…/..               35 N   AERO 37 N   RMY N/A
5/27 67/51/59/6/0.00/…/..                18 SE  AERO 18 SE  RMY 19
5/28 71/51/61/0/T/…/..                   18 SSW*AERO 18 SSW RMY 18
5/29 51/46/49/-12/0.07/…/..              21 E   AERO 20 ENE*RMY 20
5/30 61/46/54/-7/0.00/000/00               20 S   AERO 22 S   RMY 21
5/31 70/52/61/0/0.01/…/..                28 W   AERO 29 W   RMY 29

PRELIMINARY CLIMATE SUMMARY FOR MAY 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 78/55/67/+5/0/0.06/…/..              39 NW  AERO 39 NW RMY 41

6/2 Low temp since midnight is 50F; normal low is now 53F

DAILY RECORDS FOR MAY

5/17/17: DAILY RECORD MAXIMUM TEMPERATURE OF 90F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1974
AND TIED IN 1977

5/17/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F,
TIES PREVIOUS RECORD SET IN 1932

5/18/17: DAILY RECORD MAXIMUM TEMPERATURE OF 96F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1906
AND TIED IN 1936 AND 1986;
BREAKS PREVIOUS MONTHLY RECORD OF 94F SET ON
MAY 26, 2010

5/18/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
BREAKS PREVIOUS RECORD OF 61F SET IN 1943

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: Kaitlin Geagan