BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 5, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
 
HUMIDITY INCREASE OVERNIGHT AND EARLY TODAY
LOW STRATUS CLOUDS AND FOG FORM
TEMPERATURES CONTINUE WARMER THAN NORMAL
LIGHT RAIN BEGAN EARLY AND WAS VERY LIGHT
 
A light sea breeze which began early afternoon veered to
the southeast and finally south by early this morning.
The south wind brought an increase in humidity with low
clouds moving over Blue Hill early this morning. Some
light rain began by 7 A.M. EDT and was continuing very
lightly with only 0.06 by 2 P.M. EDT 
The low temperature of 61F both yesterday and this morn-
ing was 7 degrees warmer than the normal of 54 degrees.
 
PRELIMINARY STATS FOR MAY 2016
 
TEMPERATURE, Deg. F
Avg. Max. 66.9 [+0.6]
Avg. Min. 48.8 [+1.0]
Mean      57.9 [+0.8]
24-hour corrected mean: 57.2
Max. for month: 92 on 28th
Min. for month: 38 on 16th
 
HEATING DEGREE DAYS
Total heating units: 256 [-12] 
Total for the season: 5248 [-1055]
Total for last season: 6404
 
COOLING DEGREE DAYS
Total cooling units: 45 [+23] 
Total for the season: 48 [+24]
Total for last season: 49
 
PRECIPITATION, Inches
Total: 3.13 [-0.98]
Greatest in 24 hrs: 0.94 in. on 30th

SNOWFALL, Inches
Total: T [0.0]
Greatest in 24 hrs: T on 1st
 
WIND, mph
Avg. uncorrected wind speed: 10.7
Avg. corrected wind speed: 11.3
Prevailing wind direction: W at 15%
Peak gust and direction: 50 W on 15th
 
SUNSHINE:
Campbell-Stokes card minutes: 12390 mins. of possible 26226 or 47%
Astronomical total minutes: 12842 mins. of possible 27208 or 47%
 
Today's Observations:
 
7 A.M.
Weather: Overcast stratus, fog, very light rain
Temperature: 63F; Dew Point: 63F; Wind: S at 7 kts
Sea-level pressure: 29.93 ins. Hg, rising slightly then falling
but still higher than 3 hours ago
Visibility: 1 mile, except NE 1/8, SSE 11/2 miles,
light rain and fog 
6-hr Max temp: 63F
6-hr Min temp: 61F
24-hr precip: trace
BHO SA 1155 –X E3 BKN 90 OVC 1R-F 135/63/63/1807/993/ F5  
VSBY NE 1/8 SSE 11/2 PCPN VRY LGT/ 8/6// 50002 MANUAL 6000/
10063 20061
 
10 A.M.
Weather: Scattered stratus fractus layer, broken stratus fractus layer,
overcast nimbostratus, light rain and fog
Temperature: 63F; Dew Point: 62F; Wind: SSE at 10 kts,
Wind: Direction variable ESE-S
Sea-level pressure: 29.91 ins. Hg, falling slightly
Visibility: 5 miles, light rain and fog 
3-hr precip: 0.03 in.
BHO SA 1455 4 SCT E8 BKN 37 OVC 5R-F 130/63/62/1510/991/ WND 12V18/
8/72/ 58005 MANUAL 6003/ ASOS 60003     
 
1 P.M.
Weather: Scattered stratus fractus, broken/overcast altocumulus and
nimbostratus, bright spots in overcast, light rain ended 1250E.
Temperature: 62F; Dew Point: 60F; Wind: SE at 12 kts.
Wind: Gust 22 kts past hour
Wind: Direction E-S
Sea-level pressure: 29.86 ins. Hg, falling, then more quickly
Visibility: 15 miles, visibility WNW 20, thin fog 
6-hr Max temp: 64F
6-hr Min temp: 62F
6-hr precip: 0.06 in.
BHO SA 1755 9 SCT E75 BKN 90 OVC 15 111/62/60/1312/986/ BRGHT SPTS IOVC
VSBY WNW 20 WND 10V17 WND GST 22 KTS PST HR RE50/ 8/72/ 58019 MANUAL 6006/
ASOS 60005 10064 20062
 
SUMMARY FOR SATURDAY, JUNE 4, 2016
  
TEMPERATURE (DEGREES F)
MAX.....81   NORMAL.....72
MIN.....61   NORMAL.....54
MEAN....71   NORMAL.....63
 
DEPARTURE FROM 30-YEAR NORMAL.........................+8
TOTAL DEPARTURE FOR THE MONTH........................+10 [+2.3 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-4
TOTAL HEATING UNITS FOR THE MONTH...............7   DEPARTURE.........-11
TOTAL HEATING UNITS FOR THE SEASON...........5255   DEPARTURE.......-1066
TOTAL HEATING UNITS LAST SEASON TO DATE......6464   DIFFERENCE......-1209
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............6   DEPARTURE..........+4
TOTAL COOLING UNITS FOR THE MONTH...............6   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON.............54   DEPARTURE.........+23
TOTAL COOLING UNITS LAST SEASON TO DATE........49   DIFFERENCE.........+5   
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................18 S   AT  9:00 P.M. *
                   ASOS........................20 S   AT  8:06 P.M. 
                   DAVIS.......................20 SSE AT  8:05 P.M. RMY 20
FASTEST MILE FOR YESTERDAY.....................14 S   AT 10:49 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................15 S   AT 10:49 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14 S   AT 10:49 P.M. 
AVERAGE WIND SPEED AND DIRECTION..............7.5 S
                   ASOS.......................7.8
                   DAVIS......................6.9 SSW [200 Deg.]
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH.........Trace  DEPARTURE......-0.66
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........20.07  DEPARTURE......-3.25
                         ASOS.............20.44

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
 
5/1 52/39/46/-7/0.08/T/000/00               21 S   AERO 22 SE  RMY 20
5/2 50/41/46/-7/0.31/0.0/000/00             20 NE  AERO 21 NE  RMY 18
5/3 48/43/46/-7/0.16/0.0/000/00             16 E   AERO 16 E   RMY 17
5/4 48/41/45/-9/0.46/0.0/000/00             33 NE  AERO 35 NE  RMY 34
5/5 44/41/43/-11/0.30/0.0/000/00            39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/0.13/0.0/360/42             28 ENE AERO 29 N   RMY 26
5/7 51/43/47/-8/0.06/0.0/000/00             25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/0.10/0.0/284/33             47 W   AERO 53 W   RMY 49        
5/9 65/43/54/-1/0.00/0.0/743/86             40 W   AERO 44 W   RMY 40
5/10 69/40/55/0/0.00/0.0/806/93             22 W   AERO 25 WNW RMY 22
5/11 76/50/63/+7/0.00/0.0/808/93            22 WNW AERO 23 WNW*RMY 22
5/12 75/54/65/+9/0.00/0.0/819/94            23 NNE AERO 25 S   RMY 23
5/13 74/52/63/+7/0.21/0.0/079/09            27 S   AERO 27 S   RMY 26 
5/14 78/54/66/+9/0.00/0.0/656/75            35 SSW*AERO 40 SSW RMY 37
5/15 60/41/51/-6/0.00/0.0/588/67            50 W   AERO 54 W   RMY 49
5/16 58/38/48/-9/0.00/0.0/800/91            45 W*  AERO 51 WNW RMY 49
5/17 69/47/58/+1/T/0.0/344/39               32 W   AERO 38 W   RMY 38
5/18 64/48/56/-2/0.00/0.0/804/91            24 NE  AERO 26 NNW RMY N/A
5/19 66/49/58/0/0.26/0.0/283/32             23 WNW AERO 26 WNW RMY 25
5/20 73/46/60/+2/0.00/0.0/798/90            20 SSE AERO 22 SSE RMY 21
5/21 74/53/64/+5/0.00/0.0/587/66            21 S   AERO 23 S   RMY 21   
5/22 64/53/59/0/T/0.0/320/36      #         26 ENE AERO 29 ENE RMY 26
5/23 74/51/63/+4/T/0.0/491/55               22 ENE AERO 31 ENE RMY N/A           
5/24 56/50/53/-6/0.12/0.0/000/00            30 ENE AERO 31 ENE RMY 29  TSTM
5/25 86/51/69/+9/0.00/0.0/635/71            25 W   AERO 28 W   RMY 25
5/26 86/64/75/+15/0.00/0.0/610/68           21 SE  AERO 23 SE  RMY 21
5/27 81/60/71/+11/0.00/0.0/548/61           26 S   AERO 30 S   RMY 29
5/28 92/63/78/+17/0.00/0.0/711/79           22 SSW AERO 22 SSW RMY N/A
5/29 72/51/62/+1/0.00/0.0/009/01            18 NE  AERO 20 NE  RMY 18
5/30 71/52/62/+1/0.94/0.0/009/01  #         25 SSW AERO 28 SSW RMY 27
5/31 84/67/76/+15/0.00/0.0/750/83           25 W   AERO 29 WSW RMY 28  
 
6/1 71/54/63/+1/0.00/.../..                 26 NE  AERO 30 NE  RMY N/A
6/2 68/54/61/-1/0.00/.../..               # 21 NE  AERO 22 NE  RMY 21
6/3 70/57/64/+2/T/.../..                    16 SSW AERO 17 SSW RMY 16
6/4 81/61/71/+8/0.00/.../..                 18 S   AERO 21 S   RMY 20
 
6/5 Low temp since midnight is 61F; normal low now 54F
 
* Last of several occurrences
# Sunshine data corrected on the 22nd and 30th.
# 6/2 Peak gust corrected from 28 to 21 MPH (420C)
  (on this discussion only, 3rd,4th) 
 
DAILY RECORDS FOR JUNE 2016
None so far
    
DAILY RECORDS FOR MAY 2016
 
5/1/16:  DAILY RECORD SNOWFALL OF A TRACE,
         TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995
 
5/28/16: DAILY RECORD MAXIMUM TEMP. OF 92F,
         PREVIOUS RECORD OF 90F SET IN 1914  
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988
 
RECORDS FOR JUNE 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1920, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000
 
TODAY'S REPORT PREPARED BY: Robert Skilling