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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 28, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER RAINY SUNDAY ALONG WITH GUSTY WINDS
 
As was the case a week ago, we've been dealing with rain at the summit on this
Sunday.  A storm system more typical of winter than summer has been impacting
the region.  Rain began yesterday evening, and was most intense from around
5-8AM this morning.  Light rain and drizzle has continued into the afternoon. 
So far, the storm total for this event is 1.44 ins. of rain.  This will ensure
a positive precipitation departure for June, the first time that has happened
since February. 
 
Well below normal temperatures have accompanied the rain today, with the
temperature hovering in the mid-upper 50s all day so far.  Winds have been a
factor today as well, particularly late last night and into this morning.  Winds
increased from the SE last night, and have gradually shifted to NNE today. 
Average wind speeds have been around 20mph today, with some gusts near 40mph.
We're also close to our lowest barometer reading for the month so far, with the
sea-level pressure falling below 29.70 ins. Hg.

Today's Observations:

7 A.M.
Weather: Sky obscured by moderate rain and dense fog, stratus fractus
drifting below summit
Temperature: 58F; Dew Point: 58F; Wind: ENE at 21G30 kts,
Wind: Peak wind of 30 kts ENE at 6:50 A.M. EST
Sea-level pressure: 29.78 ins. Hg, falling then falling more slowly
Visibility: 1/4 mile
6-hr Max temp: 58F
6-hr Min temp: 54F
24-hr precip: 1.06 ins.
BHO SA 1155 W3 X 1/4RF 086/58/58/0721G30/978/ STFRA DRFTNG BLO SMT
PK WND 0730/50 / 8//// 56028 ASOS 60072 70105 MANUAL 70106 10058 20054
 
10 A.M.
Weather: Sky obscured by light rain and dense fog, stratus fractus drifting
below summit
Temperature: 58F; Dew Point: 58F; Wind: ENE at 15G25 kts,
Wind: Peak wind of 28 kts NE at 9:05 A.M. EST
Sea-level pressure: 29.72 ins. Hg, falling then falling more rapidly 
Visibility: 1/16 mile
3-hr precip: 0.31 ins.
BHO SA 1455 W2 X 1/16R-F 065/58/58/0615G25/972/ STFRA DRFTNG BLO SMT
PK WND 0528/05/ 8//// 58021 ASOS 60033 MANUAL 60031
 
1 P.M.
Weather: Sky obscured by light drizzle and fog, stratus fractus drifting
below summit
Temperature: 57F; Dew Point: 57F; Wind: NNE at 17G26 kts,
Wind: Peak wind of 27 kts NNE at 12:36 P.M. EST
Sea-level pressure: 29.68 ins. Hg, falling then falling more slowly
Visibility: 1/16 mile
6-hr Max temp: 59F 
6-hr Min temp: 57F
6-hr precip:  0.38 ins.
BHO SA 1755 W2 X 1/16L-F 050/57/57/0317G26/968/ STFRA DRFTNG BLO SMT
PK WND 0327/36/ 8//// 56015 ASOS 60041 MANUAL 60038 10059 20057
 
 
SUMMARY FOR SATURDAY, JUNE 27, 2015
  
TEMPERATURE (DEGREES F)
MAX.....73   NORMAL.....78
MIN.....56   NORMAL.....60
MEAN....65   NORMAL.....69

DEPARTURE FROM 30-YEAR NORMAL........................-4
TOTAL DEPARTURE FOR THE MONTH.......................-23 [-1.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0  DEPARTURE...........-1
TOTAL HEATING UNITS FOR THE MONTH..............87  DEPARTURE..........+16
TOTAL HEATING UNITS FOR THE SEASON...........6491  DEPARTURE.........+117
TOTAL HEATING UNITS LAST SEASON TO DATE......6422  DIFFERENCE.........+69

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-5
TOTAL COOLING UNITS FOR THE MONTH..............83   DEPARTURE..........-5
TOTAL COOLING UNITS FOR THE SEASON............132   DEPARTURE.........+20
TOTAL COOLING UNITS LAST SEASON TO DATE........85   DIFFERENCE........+47

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................32  ESE  AT  11:34 P.M.                 
                   ASOS........................38  ESE  AT  11:34 P.M.
                   DAVIS.......................N/A                    RMY N/A
FASTEST MILE FOR YESTERDAY.....................24  ESE  AT  11:33 P.M.          
MAXIMUM 2-MINUTE ASOS AVERAGE..................24  ESE  AT  11:34 P.M.                 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................N/A         
AVERAGE WIND SPEED AND DIRECTION............. 7.3  SE
                   ASOS.......................7.1
                   DAVIS......................5.2  SE [142 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....1.06  DEPARTURE.....+0.94
                         ASOS...............1.05
TOTAL PRECIPITATION FOR THE MONTH...........4.45  DEPARTURE.....+0.47
                         ASOS...............4.45
TOTAL PRECIPITATION FOR THE YEAR.......... 23.82   DEPARTURE....-2.69
                         ASOS...............N/A ***
 
*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
 
6/1  48/46/47/-15/0.69/000/00              32 NE  RMY 34
6/2  47/44/46/-16/..../000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32 
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A 
6/11 85/61/73/+8/0.00/594/65               29 SSW RMY 32
6/12 86/65/76/+11/..../522/57              26 S   RMY 29
6/13 83/67/75/+10/T/586/64                 24 N   RMY 27
6/14 75/61/68/+2/0.00/641/70               21 SSE RMY 21
6/15 61/52/57/-9/..../000/00               25 SE  RMY 26
6/16 73/56/65/-1/..../009/01               18 NW  RMY N/A
6/17 70/57/64/-3/0.00/605/66               28 NE  RMY 28
6/18 76/54/65/-2/0.00/669/73               22 S   RMY 26
6/19 84/60/72/+5/T/642/70                  24 SSW RMY 22
6/20 75/56/66/-2/..../559/61               23 SSE RMY N/A
6/21 76/60/68/0/..../202/22                26 S   RMY 29
6/22 83/63/73/+5/0.00/770/84               20 WNW RMY 19
6/23 85/67/76/+8/0.01/284/31               36 S   RMY 38
6/24 82/62/72/+3/0.00/899/98               25 WNW RMY 27
6/25 80/60/70/+1/0.00/605/66               21 W   RMY N/A
6/26 72/58/65/-4/0.01/.../..               23 NNE RMY 21
6/27 73/56/65/-4/..../.../..               32 ESE RMY N/A
 
6/28 low since midnight is 54F; normal low is now 61F

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 28
HIGH 95F IN 1991
LOW 47F IN 1970
PRECIP 2.09 INS IN 1938
PEAK GUST 52 MPH WSW IN 1993
 
RECORDS FOR JUNE 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien