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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 2, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
COOL, RAW, WET WEATHER CONTINUES
STORM TOTAL SO FAR 2.30 INCHES
NEW RECORD LOW MAXIMUM TEMPERATURE FOR JUNE 1
 
The cool, rainy weather of yesterday has continued into today.  A new record
low maximum temperature of 48F was set for June 1.  Today has again been in
the 40s, with a high of only 47F so far, but today's record low maximum is
46F, so that record will stand.  Rainfall has continued today as well, and
our storm total through 1PM this afternoon stands at 2.30 inches of rain. 
Winds have continued to blow from the NE today, and have not been as strong
as yesterday when several gusts over 30mph were recorded.  Visibility has
improved slightly during the day, from just a mile or two early this morning
to around 10 miles this afternoon.
 
Contrary to the cool, dreary weather of the past two days, May 2015 was the
warmest May on record here at Blue Hill, edging out May 1991.  Additional
end of month statistics will be provided here in the days ahead.
 
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
 
Today's Observations:

7 A.M.
Weather: Sky partially obscured with light rain and fog, overcast
nimbostratus, stratus fractus drifting above and below summit
Temperature: 45F; Dew Point: 45F; Wind: NNE at 13G22 kts
Sea-level pressure: 30.18 ins. Hg, rising
Visibility: 2 miles, variable 3 miles, except 1/2 mile NW-NE
6-hr Max temp: 45F
6-hr Min temp: 44F
6-hr precip (ASOS): 0.28 ins.
24-hr precip: 1.16 ins.
BHO SA 1155 -X E8 OVC 2R-F 221/45/45/0313G22/018/ F6
STFRA DRFTNG ABV AND BLO SMT VSBY 2V3 VSBY NW-NE 1/2/
8/72/ 52010 ASOS 60028 ASOS 70118 MANUAL 70116 10045 20044
 
10 A.M.
Weather: Sky partially obscured with light drizzle and fog, overcast
nimbostratus, stratus fractus drifting above and below summit, conditions
variable
Temperature: 45F; Dew Point: 45F; Wind: NNE at 13 kts
Sea-level pressure: 30.19 ins. Hg, decreasing then increasing
Visibility: 5 miles, except 10 miles SSE-S, 3/4 mile N
3-hr precip: 0.11 ins.
BHO SA 1455 -X E10 OVC 5L-F 222/45/45/0313/019/ F6
STFRA DRFTNG ABV AND BLO SMT VSBY SSE-S 10 VSBY N 3/4 CNDTS VRB/
8/72/ 53001 ASOS 60012 MANUAL 60011
 
1 P.M.
Weather: Broken stratus fractus, overcast nimbostratus, few stratus fractus
drifting below summit  
Temperature: 46F; Dew Point: 46F;  Wind: NNE at 10 kts
Sea-level pressure 30.19 ins. Hg, increasing then decreasing
Visibility: 10 miles, except 3 miles N-ENE
6-hr Max temp: 47F
6-hr Min temp: 45F
6-hr precip: 0.18 ins.
BHO SA 1755 E6 BKN 13 OVC 10R- 223/46/46/0310/019/ FEW STFRA DRFTNG BLO SMT
VSBY N-ENE 3/ 8/72/ 50001 ASOS 60018 MANUAL 60018 10047 20045
 
SUMMARY FOR MONDAY, JUNE 1, 2015
  
TEMPERATURE (DEGREES F)
MAX.....48   NORMAL.....71
MIN.....46   NORMAL.....53
MEAN....47   NORMAL.....62

DEPARTURE FROM 30-YEAR NORMAL.......................-15
TOTAL DEPARTURE FOR THE MONTH.......................-15 [-15.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............18  DEPARTURE..........+13
TOTAL HEATING UNITS FOR THE MONTH..............18  DEPARTURE..........+13
TOTAL HEATING UNITS FOR THE SEASON...........6422  DEPARTURE.........+114
TOTAL HEATING UNITS LAST SEASON TO DATE......6399  DIFFERENCE.........+23

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH..............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE SEASON............49   DEPARTURE.........+23
TOTAL COOLING UNITS LAST SEASON TO DATE.......13   DIFFERENCE........+36

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................32  NE   AT  6:36 P.M. *            
                   ASOS.......................33  NE   AT  5:52 P.M.             
                   DAVIS......................31  NNE  AT  3:40 P.M. RMY 34
FASTEST MILE FOR YESTERDAY....................23  NNE  AT  3:27 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE.................23  NE   AT  3:41 P.M.             
MAXIMUM 2-MINUTE DAVIS AVERAGE................22  NNE  AT  3:41 P.M.      
AVERAGE WIND SPEED AND DIRECTION..............15.0   
                   ASOS.......................14.6   
                   DAVIS......................12.9 NE [48 deg.] 
* Last of several occurrences...

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....1.16   DEPARTURE....+0.99
                         ASOS...............1.18
TOTAL PRECIPITATION FOR THE MONTH...........1.16   DEPARTURE....+0.99
                         ASOS...............1.18
TOTAL PRECIPITATION FOR THE YEAR.......... 20.67   DEPARTURE....-2.03
                         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/..../0.0/538/61               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/..../0.0/461/52               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/..../0.0/081/09               40 NE  RMY 43 
 
6/1  48/46/47/-15/..../0.0/000/00              32 NE  RMY 34
 
6/2 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 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: Jonathan O'Brien and Justin Hall