BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 30, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
JUNE ENDING MOSTLY CLOUDY AND HUMID
 
It has been another humid day today as we remain in the same air mass that
has provided the warm, humid weather for several days.  The dew point has
once again been around 70F for most of the day. The sky has been mostly
cloudy for much of the day, with a combination of stratocumulus, cumulus,
and cirrus.  This has limited sunshine, but the temperature has managed
to rise to 83F so far today, a few degrees above average. A partial halo was
observed around the Sun at times today.  The wind has once again been
steady out of the south at about 10mph.  Visibility increased to about 35
miles by early afternoon after being limited to 15 miles or less by thin fog
for most of the morning.
 
The total precipitation for this month still stands at 11.94 inches,
which keeps it as the fourth wettest June on record, 0.37 inches behind
third place.  Rain is possible tonight, which will give this month a final
chance to move to third place if more than 0.37 inches falls before
midnight EST.
 
Blue Hill Wettest Junes, inches (1886-2013)
1) 17.32 in 1998
2) 13.73 in 1982
3) 12.31 in 2006
4) 11.94 in 2013 (through 2 P.M. EDT on 6/30)
5) 10.78 in 1922
 
Today's Observations:
 
7 A.M.
Weather: Broken stratocumulus, broken cirrus, few altocumulus N, sun
dimly visible
Temperature: 71F; Dew Point: 68F; Wind: S at 9 kts
Sea-level pressure: 29.86 ins. Hg, rising
Visibility: 10 miles, thin fog all quadrants
24-hour precip: Trace
6-hour min. temp: 69F
BHO SA 1155 E15 BKN 250 BKN 10 112/71/68/1909/986/ FEW AC N SUN DMLY VSBL
TF ALQDS/ 8/571 52024 MANUAL 7000/ 10071 20069
 
10 A.M.
Weather: Broken stratocumulus (with moderate tops), broken dense cirrus,
broken cirrus, few altocumulus NNE-N
Temperature: 75F; Dew Point: 69F; Wind: S at 9 kts
Sea-level pressure: 29.88 ins. Hg, rising then rising more slowly
Visibility: 15 miles, thin fog all quadrants
BHO SA 1455 E10 BKN 220 BKN 250 BKN 15 120/75/69/1909/988/ SC MDT CUFRM TOPS
FEW AC NNE-N TF ALQDS/ 8/572 51008
 
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, broken dense cirrus,
broken cirrus, moderate cumulus distant W-N, few cumulus congestus distant
W-NW, towering cumulus distant W-NW
Temperature: 82F; Dew Point: 72F; Wind: S at 9 kts,
Wind: Direction variable SSE-WSW
Sea-level pressure: 29.89 ins. Hg, rising then steady
Visibility: 35 miles, light distant haze
6-hour max. temp: 83F
BHO SA 1755 25 SCT 90 SCT E200 BKN 250 BKN 35 121/82/72/1909/989/
MDT CU DSNT W-N FEW CU CONGESTUS DSNT W-NW TCU DSNT W-NW LGT DSNT HZ
WND 16V24/ 8/252 51001 10083 20071
 
WEATHER SUMMARY FOR SATURDAY, JUNE 29, 2013
 
TEMPERATURE (DEGREES F)
MAX.....80     NORMAL.....79
MIN.....68     NORMAL.....61
MEAN....74     NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL....................+4
TOTAL DEPARTURE FOR THE MONTH...................+36 [+1.0 DEGREE/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH.............48   DEPARTURE.........-25
TOTAL HEATING UNITS FOR THE SEASON..........5782   DEPARTURE........-594
TOTAL HEATING UNITS LAST SEASON TO DATE.....4984  DIFFERENCE........+798
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............30 S   AT  4:43 P.M. *
                   AERO....................32 S   AT  3:34 P.M.
                   ASOS....................33 S   AT  4:44 P.M.
                   DAVIS...................32 S   AT  3:34 P.M.  RMY 34
FASTEST MILE FOR YESTERDAY.................28 S   AT  4:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..............25 S   AT  3:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............25 S   AT  3:35 P.M.
AVERAGE WIND SPEED AND DIRECTION..........14.9 S
                   ASOS...................13.8
                   DAVIS..................13.7 S [189 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace  DEPARTURE............-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH.........11.94   DEPARTURE............+7.74
                         ASOS.............12.00
TOTAL PRECIPITATION FOR THE YEAR..........32.03   DEPARTURE............+5.17
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals 
     
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
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  90/69/80/+18/0.00/905/100       30 SW  AERO 32 MPH SW  RMY 33
6/2  86/64/75/+13/T/761/84           42 SSW AERO 44 MPH SSW RMY 46
6/3  75/57/66/+4/0.47/154/17         22 WNW AERO 22 MPH SSW RMY 22
6/4  70/48/59/-4/0.00/899/99         25 W   AERO 25 MPH W   RMY 25
6/5  73/51/62/-1/0.00/727/80         20 SSW AERO 21 MPH S   RMY 22
6/6  74/54/64/+1/0.03/455/50         22 SSE AERO 22 MPH S   RMY 22
6/7  57/51/54/-10/3.28/000/00        33 NE  AERO 32 MPH NE  RMY 34
6/8  77/52/65/+1/0.78/356/39         29 W   AERO 29 MPH W   RMY 29  TSTM
6/9  78/57/68/+4/0.00/886/97         25 W   AERO 23 MPH W   RMY 25
6/10 69/55/62/-3/0.76/119/13         24 E   AERO 24 MPH E   RMY N/A
6/11 65/53/59/-6/1.61/000/00         29 E   AERO 29 MPH E   RMY N/A
6/12 69/54/62/-3/0.01/320/35         38 NW  AERO 41 MPH NW  RMY 41
6/13 65/50/58/-7/0.93/110/12         32 NE  AERO 33 MPH NE  RMY 34
6/14 70/61/61/-5/1.38/421/46         32 NE  AERO 32 MPH NE  RMY 29
6/15 77/56/67/+1/0.00/907/99         23 NW  AERO 24 MPH NW  RMY 26
6/16 74/57/66/0/0.00/266/29          25 S   AERO 24 MPH S   RMY 27
6/17 84/60/72/+5/1.27/734/80         45 NW  AERO 51 MPH NW  RMY 48  TSTM
6/18 74/56/65/-2/0.61/440/48         32 ENE AERO 32 MPH ENE RMY 33  TSTM
6/19 71/53/62/-5/T/761/83            20 NNE AERO 20 MPH NNE RMY N/A
6/20 78/53/66/-2/0.00/889/97         18 SSW AERO 20 MPH SSW RMY N/A
6/21 82/57/70/+2/0.00/724/79         22 SW  AERO 22 MPH SW  RMY 23
6/22 82/62/72/+4/0.00/743/81         23 SW  AERO 24 MPH SW  RMY 25
6/23 87/63/75/+7/T/834/91            29 SW  AERO 31 MPH SW  RMY 32
6/24 91/68/80/+11/0.06/.../..        28 W   AERO 30 MPH W   RMY 30  TSTM
6/25 90/69/78/+9/T/.../..            32 W   AERO 33 MPH W   RMY 39
6/26 83/65/74/+5/0.02/.../..         20 NNE AERO 20 MPH NNE RMY 20
6/27 66/61/64/-5/T/000/00            20 ENE AERO 17 MPH ENE RMY 20
6/28 78/61/70/0/..../.../..          32 S   AERO 36 MPH S   RMY 36
6/29 80/68/74/+4/T/.../..            30 S   AERO 32 MPH S   RMY 34
 
6/30 morning low temp: 68F; the normal low is now 61F
 
DAILY RECORDS FOR JUNE 2013
6/1  - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 90F;
     previous record of 90F set in 1937
6/1  - NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F;
     surpasses previous record of 68F set in 1944, 1987
6/24 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 91F;
     previous record of 91F set in 1914, 1976
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957
 
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
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien and Peter Volpe