BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 3, 2015 
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN FINALLY ENDS, TEMPERATURES BEGIN SLOW
CLIMB OUT OF THE 40S AND 50S

Rain, which ended yesterday afternoon, completed
the soggy and cool stretch which began on Sunday.
A storm total of 2.31 inches of new precipitation
was recorded by storm's end, with temperatures
unable to reach the 50F degree mark yesterday.
Yesterday's average temperature of 46F was 16
degrees below the daily norm.

Cloudy, cool and damp continues have been slow
to clear this morning. By today's 1:00 PM EST
observation only a few small patches of blue 
sky were to be found mostly over the ocean.
Temperatures were only able to reach a maximum
so far of 55F, some 17 degrees below the daily
normal maximum.

BHO Warmest Mays, deg F (1885-2015)

1) 61.5 in 2015
2) 61.4 in 1991
3) 61.0 in 1944
4) 60.9 in 2010
5) 59.4 in 1911
   59.4 in 1959

PRELIMINARY STATS FOR MAY 2015

TEMPERATURE, Deg. F
Avg. Max. 74.6 [+8.3]
Avg. Min. 49.7 [+1.9]
Mean      62.2 [+5.1]
Corrected mean: 61.5 
Max. for month: 88 on 5/10
Min. for month: 35 on 5/2

HEATING DEGREE DAYS 
Total heating units: 133 [-135]    
Total for the season: 6404 [+101]
Total for last season: 6394

COOLING DEGREE DAYS
Total cooling units: 49 [+27]    
Total for the season: 49 [+25]
Total for last season: 13

PRECIPITATION, Inches
Total: 1.45 [-2.66]
Greatest in 24 hrs: 1.07, 
2:00 PM EST on 5/31 thru 1:59 PM EST on 6/1 

SNOWFALL, Inches
Total: None
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 12.2
Avg. corrected wind speed: 12.6
Prevailing wind direction: SSW @ 23%
Peak gust and direction: 40 NE on the 31st

SUNSHINE:
Astronomical total minutes:   17534 / 27166 or 65%
Campbell-Stokes card minutes: 16950 / 26226 or 65%


Today's Observations:
 
7 A.M.
Weather: Broken cirrus, few stratus fractus in all 
directions
Temperature: 49F; Dew Point: 47F; Wind: estimated WNW at 1 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.23 ins. Hg, rising, then more slowly
Visibility: 25 miles, except 60 miles W-NW, thin fog in 
all directions
6-hr Max temp: 49F
6-hr Min temp: 44F
24-hr precip: 0.19 ins.
BHO SA 1155 E270 BKN 25 238/49/47/E2901/023/ VSBY W-NW 60 MI 
FEW STFRA ALQDS THN FG ALQDS WND LGT AND VRB/ 8/701 51007 
ASOS 70019 MANUAL 70019 10049 20044

10 A.M.
Weather: Broken stratocumulus, few stratus fractus N-NNE
Temperature: 54F; Dew Point: 46F; Wind: estimated N at 4 kts
Wind Speed: Light
Sea-level pressure: 30.25 ins. Hg, increasing, then more slowly 
Visibility: 60 miles, except 30 miles N-NNE
BHO SA 1455 E35 BKN 60 245/54/46/E3604/025/ VSBY N-NNE 30 MI 
FEW STFRA N-NNE WND LGT/ 8/500 51007
 
1 P.M.
Weather: Broken stratocumulus, few cumulus/stratocumulus
in all directions
Temperature: 55F; Dew Point: 47F;  Wind: estimated NNE at 6 kts
Wind Speed: Light 
Sea-level pressure 30.26 ins. Hg, increasing slightly
Visibility: 50 miles
6-hr Max temp: 55F
6-hr Min temp: 49F
6-hr precip: none
BHO SA 1755 E25 BKN 50 246/55/47/E0306/026/ FEW SC/CU ALQDS 
WND LGT AND VRB/ 8/800 50001 10055 20049


SUMMARY FOR TUESDAY, JUNE 2, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....47   NORMAL.....71
MIN.....44   NORMAL.....53
MEAN....46   NORMAL.....62
 
DEPARTURE FROM 30-YEAR NORMAL.......................-16
TOTAL DEPARTURE FOR THE MONTH.......................-31 [-15.7 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............19  DEPARTURE..........+14
TOTAL HEATING UNITS FOR THE MONTH..............37  DEPARTURE..........+27 
TOTAL HEATING UNITS FOR THE SEASON...........6441  DEPARTURE.........+129
TOTAL HEATING UNITS LAST SEASON TO DATE......6399  DIFFERENCE.........+42
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH..............0   DEPARTURE..........-3
TOTAL COOLING UNITS FOR THE SEASON............49   DEPARTURE.........+22
TOTAL COOLING UNITS LAST SEASON TO DATE.......15   DIFFERENCE........+34
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................28  NNE  AT  8:01 A.M. *             
                   ASOS.......................29  NNE  AT  7:57 A.M.              
                   DAVIS......................26  NE   AT  N/A  A.M. RMY 28
FASTEST MILE FOR YESTERDAY....................18  NNE  AT  7:58 A.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE.................17  NE   AT  7:58 A.M.             
MAXIMUM 2-MINUTE DAVIS AVERAGE................17  NNE  AT  7:58 A.M.       
AVERAGE WIND SPEED AND DIRECTION..............10.7 NNE    
                   ASOS.......................10.5    
                   DAVIS......................9.8 NE [035 deg.]  
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.19   DEPARTURE....+0.03
                         ASOS...............0.19
TOTAL PRECIPITATION FOR THE MONTH...........1.49   DEPARTURE....+1.16 
                         ASOS...............1.51
TOTAL PRECIPITATION FOR THE YEAR.......... 20.86   DEPARTURE....-2.00
                         ASOS...............N/A ***
*** ASOS annual totals not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR MAY-JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
 
5/1  52/37/45/-8/0.00/0.0/354/42               21 NE  RMY 20
5/2  63/35/49/-4/0.00/0.0/668/79               20 S   RMY 20 
5/3  74/44/59/+6/0.00/0.0/509/60               22 S   RMY 22
5/4  83/47/65/+11/0.00/0.0/783/92              39 SSW RMY 45
5/5  77/56/67/+13/0.03/0.0/222/26              29 SW  RMY N/A
5/6  74/54/64/+10/0.00/0.0/574/67              24 SSW RMY 25
5/7  84/52/68/+13/0.00/0.0/824/96              29 S   RMY 32
5/8  74/44/59/+4/0.00/0.0/809/94               27 NNE RMY 26
5/9  77/44/61/+6/0.00/0.0/509/59               30 S   RMY 32
5/10 88/60/74/+19/0.00/0.0/692/80              28 SSW RMY 30
5/11 84/48/66/+10/0.00/0.0/529/61              30 NE  RMY 31
5/12 84/47/66/+10/0.24/0.0/287/33              33 WNW RMY 37 
5/13 67/47/57/+1/0.00/0.0/820/94               31 WNW RMY N/A
5/14 70/44/57/+0/0.00/0.0/848/97               22 NW  RMY 22
5/15 73/51/62/+5/0.00/0.0/491/56               20 WSW RMY 21
5/16 68/53/61/+4/T/0.0/053/06                  23 S   RMY 24
5/17 79/50/65/+8/T/0.0/783/89                  21 NE  RMY N/A
5/18 62/48/55/-3/0.00/0.0/538/61               25 NE  RMY N/A
5/19 63/50/57/-1/0.36/0.0/000/00               24 S   RMY 26
5/20 66/46/56/-2/0.00/0.0/753/85               32 WNW RMY 37 
5/21 66/43/55/-4/0.00/0.0/461/52               24 S   RMY 24
5/22 73/49/61/+2/T/0.0/711/80                  32 NW  RMY 36
5/23 64/40/52/-7/0.00/0.0/855/96               28 WNW RMY 32
5/24 81/50/66/+7/0.00/0.0/750/84               28 SSW RMY 31
5/25 80/56/68/+8/0.00/0.0/232/26               29 SSW RMY 31
5/26 83/61/72/+12/0.00/0.0/591/66              30 SSW RMY N/A
5/27 82/62/72/+12/T/0.0/727/81                 36 SSW RMY 41 
5/28 83/61/72/+11/0.00/0.0/548/61              30 SSW RMY 34
5/29 77/58/68/+7/0.00/0.0/828/92               18 ENE RMY 19
5/30 85/55/70/+9/0.00/0.0/704/78               37 SSW RMY 42
5/31 78/46/62/+1/0.82/0.0/081/09               40 NE  RMY 43 TSTM  

6/1  48/46/47/-15/0.69/0.0/000/00              32 NE  RMY 34
6/2  47/44/46/-16/..../0.0/000/00              28 NNE RMY 28

6/3 low since midnight is 44F; normal low is now 53F
 
DAILY RECORDS FOR MAY 2015

None.

DAILY RECORDS FOR JUNE 2015
6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004
 
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: Brian Fitzgerald