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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JUNE 3, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

SCATTERED AFTERNOON SHOWERS PASS BHO

Skies have been clearing and darkening today as scattered
showers pass Great Blue Hill.  Light rain began at 11:30AM
EST and has continued on and off since then.  Precip.
measured 0.01 in. at the 1:00PM observation.  Cumulus and
altocumulus clouds have kept the skies mostly cloudy with
spotty sunshine.

Temperatures dropped to a low of 47F last night and have
only risen to 66F by 1:00PM.  Visibility was 70 miles for
most of the day but limited in small sections due to distant
showers.  Winds have been gusting out of the west-northwest
and northwest over 20 MPH.


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: 1.67 in. on 13th-14th

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: 9,564 minutes of possible 26,226 or 36%
Astronomical total minutes: 9,911 minutes of possible 27,196 or 36%


Today's Observations:

7 A.M.
Weather: Few cumulus S-N, scattered altocumulus
Temperature: 54F; Dew Point: 44F; Wind: WSW at 6 kts,
Wind speed: Light
Sea-level pressure: 29.93 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 54F
6-hr Min temp: 47F
24-hr precip: 0.00 in.
BHO SA 1155 84 SCT 70 134/54/44/2506/993/ FEW CU S-N WND LGT/
8/130 51009 10054 20047

10 A.M.
Weather: Broken cumulus, broken altocumulus
Temperature: 64F; Dew Point: 43F; Wind: WNW at 11G19 kts
Sea-level pressure: 29.89 ins. Hg, falling, then more quickly
Visibility: 70 miles
BHO SA 1455 E44 BKN 120 BKN 70 121/64/43/2911G19/989/ 8/130 56013

1 P.M. 
Weather: Broken cumulus, broken altocumulus, distant showers SE-S
Temperature: 61F; Dew Point: 47F; Wind: NW at 8G15 kts
Sea-level pressure: 29.87 ins. Hg, falling then steady
Visibility: 70 miles, except 35 mile SE-S
6-hr Max temp: 66F
6-hr Min temp: 52F
6-hr precip: 0.01 in.
BHO SA 1755 E44 BKN 84 BKN 70 116/61/47/328G15/987/ VSBY SE-S 35
DSNT SHWRS SE-S/ 8/130 55005 MANUAL 6001/ ASOS 60001 10066 20052


SUMMARY FOR FRIDAY, JUNE 2, 2017
 
TEMPERATURE (DEGREES F)
MAX.....70   NORMAL.....71
MIN.....50   NORMAL.....53
MEAN....60   NORMAL.....62

DEPARTURE FROM 30-YEAR NORMAL.........................-2
TOTAL DEPARTURE FOR THE MONTH.........................+3 [+1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............5   DEPARTURE...........0
TOTAL HEATING UNITS FOR THE MONTH...............5   DEPARTURE..........-5
TOTAL HEATING UNITS FOR THE SEASON...........5667   DEPARTURE........-645
TOTAL HEATING UNITS LAST SEASON TO DATE......5254   DIFFERENCE.......+413

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH...............2   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON.............58   DEPARTURE.........+31
TOTAL COOLING UNITS LAST SEASON TO DATE........48   DIFFERENCE........+10

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................32 WNW AT 10:05 A.M.
                   AERO........................35 WNW AT 10:05 A.M.
                   ASOS........................34  W  AT 12:47 P.M.
                   DAVIS.......................32 WNW AT 10:05 A.M. RMY 34
FASTEST MILE FOR YESTERDAY.....................23  W  AT  9:43 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................22  W  AT  1:19 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................22  W  AT  9:45 A.M.
AVERAGE WIND SPEED AND DIRECTION.............11.7 WNW
                   ASOS......................11.9
                   DAVIS.....................10.1  W  [280 deg.]

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..........0.06  DEPARTURE......-0.27
                         ASOS..............0.07
TOTAL PRECIPITATION FOR THE YEAR..........25.40  DEPARTURE......+2.41
                         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/-9/0.44/000/00               35 N   AERO 37 N   RMY N/A
5/27 67/51/59/6/0.00/449/50                18 SE  AERO 18 SE  RMY 19
5/28 71/51/61/0/T/333/37                   18 SSW*AERO 18 SSW RMY 18
5/29 51/46/49/-12/0.07/000/00              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 70/52/61/0/0.01/000/00                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/+5/0.06/.../..               39 NW  AERO 39 NW  RMY 41
6/2  70/50/60/-2/0.00/.../..               32 WNW AERO 35 WNW RMY 34

6/3 Low temp since midnight is 47F; 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 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: Cecilia Borries-Strigle