BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 1, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER SUNNY AND WARM DAY WITH MODERATE HUMIDITY...
 
The sky has been mostly sunny today as temperatures climbed into the low 80s early
on. Humidity has dropped off a tad since early this morning and has since been fairly
steady. Visibility has been decent today, around 50 miles with Grand Monadnock seen
faintly out to the northwest. Altocumulus clouds have built in beginning early this
afternoon with some diurnal cumulus in the vicinity as well. There were even some
moderate cumulus off to the distant SE-SW. A chance of thundershowers remain for most
of the region with our greatest chance on Independence Day.
 
As June temperature finishes below normal, this marks only the fourth time since
January 2010 where the average monthly temperature finished below normal:
 
June 2012: -1.3 degrees
June 2011: -0.6 degrees
January 2011: -1.4 degrees
December 2010: -1.6 degrees
 
Today's observations:
 
7 A.M.
Weather: Clear, few altocumulus S-SW, smoke layer all quadrants except NNE-ESE,
distant haze
Temperature: 75F; Dew Point: 62F; Relative Humidity: 64%
Wind: W at 11 kts
Sea-level pressure: 29.80 in Hg, rising steadily
Visibility: 40 miles, 65 miles WNW-NW, distant haze
6-hour min. temp: 70F
BHO SA 1155 CLR 40 092/75/62/2811/980/ FEW AC S-SW K LYR ALQDS XCPT NNE-ESE DSNT HZ
VSBY HIER WNW-NW 65/ 8/002 52010 10075 20070
 
10 A.M.
Weather: Scattered altocumulus, scattered cirrus, few altocumulus cumulogenitus E-SW,
few altocumulus undulatus SW, light distant haze
Temperature: 85F; Dew Point: 63F; Relative Humidity: 47%
Wind: W at 12 kts,
Wind: Direction variable WSW-NW
Sea-level pressure: 29.71 in Hg, falling  
Visibility: 50 miles, 65 miles WNW-NW, distant haze
BHO SA 1455 110 SCT 210 SCT 50 092/85/63/2812/980/ FEW ACCU E-SW FEW AC UNDULATUS SW
DSNT HZ VSBY HIER WNW-NW 65 WND 25V32/ 8/062 58000
 
1 P.M.
Weather: Scattered cumulus, scattered altocumulus lenticularis, scattered altocumulus
stratiformis, few small cumulus forming all quadrants, few moderate cumulus SE-SW,
distant haze
Temperature: 87F; Dew Point: 64F; Relative Humidity: 46%
Wind: WSW at 12 kts,
Wind: Direction variable S-W
Sea-level pressure: 29.79 in Hg, falling
Visibility: 55 miles, 65 miles WNW-NW, distant haze
6-hour max. temp: 87F 
BHO SA 1755 50 SCT 80 SCT 100 SCT 55 088/87/64/2312/979/ FEW SM CU FRMG ALQDS FEW MDT
CU SE-SW DSNT HZ VSBY HIER WNW-NW 65 WND 18V28/ 8/250 58004 10087 20075
 
WEATHER SUMMARY FOR SATURDAY, JUNE 30
 
TEMPERATURE (DEGREES F)
MAX.....89    NORMAL.....79
MIN.....67    NORMAL.....61
MEAN....78    NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL.......................+8
TOTAL DEPARTURE FOR THE MONTH......................-33 [-1.3 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH..............96   DEPARTURE.........+22
TOTAL HEATING UNITS FOR THE SEASON...........4984   DEPARTURE.......-1387
TOTAL HEATING UNITS LAST SEASON TO DATE......6239   DIFFERENCE......-1255
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............32 W   AT 12:37 P.M.
                   AERO..................33 W   AT 12:37 P.M.
                   ASOS..................32 W   AT 12:37 P.M.
                   DAVIS.................31 W   AT 11:37 A.M. RMY 33
THE FASTEST MILE FOR YESTERDAY...........24 W   AT 12:26 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE............23 WNW AT 12:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........21 W   AT 12:37 P.M.
AVERAGE WIND SPEED AND DIRECTION.......14.3 WSW
                   ASOS................13.6
                   DAVIS...............12.6 WSW [256 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE...........-0.11
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.45   DEPARTURE...........+0.14
                         ASOS..............4.37
TOTAL PRECIPITATION FOR THE YEAR..........17.69   DEPARTURE...........-9.28
                         ASOS.............17.62
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2012 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
6/1  67/53/60/-2/0.00/742/82        28 ENE AERO 28 MPH ENE RMY 29
6/2  63/52/58/-4/0.80/000/00        39 SE  AERO 39 MPH SE  RMY 40
6/3  62/50/56/-6/0.01/082/09        31 N   AERO 28 MPH N   RMY 29
6/4  50/47/49/-14/0.58/000/00       44 NNE AERO 43 MPH NNE RMY 43
6/5  54/47/51/-12/0.23/009/01       23 NNE AERO 18 MPH NNE RMY N/A
6/6  63/48/56/-7/0.01/310/34        16 ENE AERO 14 MPH ENE RMY 15
6/7  70/50/60/-4/0.27/328/36        31 NE  AERO 31 MPH NE  RMY 32 TSTM,1/8" HAIL
6/8  76/51/64/0/0.03/502/55         25 WSW AERO 25 MPH WNW RMY 26 TSTM
6/9  76/56/66/+2/T/822/90           25 WNW AERO 24 MPH WNW RMY 24
6/10 78/56/67/+2/0.00/868/95        21 E   AERO 18 MPH E   RMY 18
6/11 76/55/66/+1/0.00/521/57        23 S   AERO 21 MPH S   RMY 22
6/12 73/57/65/0/0.03/320/35         29 S   AERO 29 MPH S   RMY 30
6/13 63/60/62/-3/0.59/000/00        25 S   AERO 23 MPH S   RMY N/A
6/14 69/58/64/-2/0.00/624/68        32 NNE AERO 29 MPH NE  RMY 31
6/15 68/54/61/-5/0.00/890/97        28 ENE AERO 24 MPH ENE RMY 25
6/16 64/51/58/-8/T/485/53           28 NE  AERO 24 MPH NE  RMY 27
6/17 67/50/59/-8/0.00/752/82        21 E   AERO 17 MPH E   RMY 19
6/18 68/50/59/-8/0.00/761/83        21 S   AERO 20 MPH S   RMY 20
6/19 73/53/63/-4/0.00/284/31        24 SW  AERO 23 MPH SW  RMY 24 
6/20 93/62/78/+10/0.00/844/92       22 SW  AERO 22 MPH SW  RMY N/A
6/21 94/74/84/+16/0.00/872/95       22 NW  AERO 22 MPH NW  RMY 21
6/22 93/69/81/+13/0.13/633/69       42 W   AERO 39 MPH W   RMY 43 TSTM
6/23 85/61/71/+5/0.35/504/55        48 NNW AERO 50 MPH NNW RMY 46 TSTM  
6/24 82/59/71/+2/0.00/715/78        22 NW  AERO 21 MPH NW  RMY 21
6/25 71/59/65/-4/1.38/193/21        32 S   AERO 32 MPH S   RMY 32 TSTM
6/26 71/56/64/-5/T/339/37           35 NW  AERO 36 MPH NW  RMY 36
6/27 76/55/66/-3/T/321/35           29 W   AERO 28 MPH W   RMY 30
6/28 83/59/71/+1/0.00/833/91        25 WNW AERO 24 MPH WNW RMY 26
6/29 86/65/76/+6/0.04/549/60        29 WNW AERO 28 MPH WNW RMY 30
6/30 89/67/78/+8/0.00/.../..        32 W   AERO 33 MPH W   RMY 33
 
7/1 morning low temp: 70F; the normal low is now 61F
 
DAILY RECORDS FOR JUNE 2012
6/4 - NEW DAILY RECORD LOW MAXIMUM TEMP OF 50F;
surpasses the previous record of 51F in 1891.
6/21 - NEW DAILY RECORD HIGH MAXIMUM TEMP OF 94F;
surpasses the previous record of 92F in 1949.
6/21 - TIED DAILY RECORD HIGH MINIMUM TEMP OF 74F;
ties the current record of 74F in 1923.
6/22 - TIED DAILY RECORD HIGH MAXIMUM TEMP OF 93F;
ties the current record of 93F in 1921.
6/22 - TIED DAILY RECORD HIGH MINIMUM TEMP OF 69F;
ties the current record of 69F in 1892.
6/25 - NEW DAILY RECORD MAXIMUM PRECIPITATION OF 1.38 INS;
surpasses the previous record of 1.10 ins. in 2006.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974
 
RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999 
 
TODAY'S REPORT PREPARED BY: George Tabeek