BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JUNE 29, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MORNING FOG GIVES WAY TO PARTLY CLOUDY SKIES
JUNE 2013 STILL FOURTH WETTEST JUNE ON RECORD
 
For the third straight morning, fog covered the summit of Blue Hill at
the 7AM observation today, with the visibility down to just 1/16 of a
mile.  The fog steadily dissipated over the next couple hours, leaving
mostly cloudy skies.  Some clearing occurred from late morning through
early afternoon, allowing for some sunshine.  The temperature has risen to
80F so far today after a warm morning low temperature of 69F.  The air
has once again had a very humid feel, with dew points at or slightly below
70F for most of the day.  Winds have been moderate at around 10-15mph,
mostly out of the S, with a few gusts of 20-25mph.
 
The total precipitation for this month now stands at 11.94 inches after
0.14 inches fell early this morning.  A very light shower around 11 A.M.
EDT left only a trace of precipitation. June 2013 remains the fourth wettest
on record so far at Blue Hill, and is now only 0.37 inches behind third
place.  Scattered showers and thunderstorms are expected to continue today
and tomorrow, which may provide enough rain to get the 0.37 inches needed.
 
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 6/29)
5) 10.78 in 1922
 
Today's Observations:
 
7 A.M.
Weather: Sky obscured by dense fog, stratus drifting over summit
Temperature: 70F; Dew Point: 69F; Wind: SSW at 9 kts
Sea-level pressure: 29.59 ins. Hg, rising then steady
Visibility: 1/16 mile, dense fog
6-hour precip: 0.14 inch
24-hour precip: 0.16 inch
6-hour min. temp: 70F
BHO SA 1155 W3 X 1/16F 022/70/69/2109/959/ STRA DRFTNG OVR SMT 8////
51010 ASOS 60014 MANUAL 70016 ASOS 70016 10070 20070
 
10 A.M.
Weather: Scattered altocumulus, overcast altocumulus, few stratus fractus
all quadrants, few altocumulus lenticularis, break in overcast distant
WSW-WNW, rain shower S-W-N
Temperature: 72F; Dew Point: 69F; Wind: S at 8 kts,
Wind: Direction variable S-SW
Sea-level pressure: 29.60 ins. Hg, rising then falling
Visibility: 15 miles, thin fog all quadrants
BHO SA 1455 85 SCT E100 OVC 15 023/72/69/1908/960/ FEW STFRA ALQDS
FEW ACSL BINOVC WSW-WNW SHRA S-W-N WND 17V23/ 8/74/ 50001
 
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, scattered cirrus,
broken higher cirrus, few moderate cumulus SW-N, few cumulus congestus
SW-NW, higher altocumulus S, few altocumulus castellanus ENE
Temperature: 80F; Dew Point: 68F; Wind: S at 12G21 kts,
Wind: Direction variable S-SW
Sea-level pressure: 29.63 ins. Hg, rising then falling
Visibility: 35 miles, light distant haze
6-hour precip: Trace
6-hour max. temp: 80F
BHO SA 1755 35 SCT 85 SCT 220 SCT E270 BKN 35 033/80/68/1912G21/963/
FEW MDT CU SW-N FEW CU CONGESTUS SW-NW AC S FEW ACC ENE LGT DSNT HZ
WND 17V23/ 8/281 50010 MANUAL 6000/ 10080 20070
 
WEATHER SUMMARY FOR FRIDAY, JUNE 28, 2013
 
TEMPERATURE (DEGREES F)
MAX.....78     NORMAL.....79
MIN.....61     NORMAL.....61
MEAN....70     NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL....................0
TOTAL DEPARTURE FOR THE MONTH...................+32 [+0.9 DEGREE/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH.............48   DEPARTURE.........-24
TOTAL HEATING UNITS FOR THE SEASON..........5782   DEPARTURE........-593
TOTAL HEATING UNITS LAST SEASON TO DATE.....4984  DIFFERENCE........+798
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............32 S   AT  1:30 P.M.
                   AERO....................36 S   AT  1:30 P.M.
                   ASOS....................36 S   AT  1:30 P.M.
                   DAVIS...................34 S   AT  1:30 P.M.  RMY 36
FASTEST MILE FOR YESTERDAY.................27 S   AT  4:41 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE..............25 S   AT  4:42 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............25 S   AT  3:55 P.M.
AVERAGE WIND SPEED AND DIRECTION..........16.2 S
                   ASOS...................14.5
                   DAVIS..................14.4 S [162 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.16   DEPARTURE............+0.06
                         ASOS..............0.16
TOTAL PRECIPITATION FOR THE MONTH.........11.94   DEPARTURE............+7.86
                         ASOS.............12.00
TOTAL PRECIPITATION FOR THE YEAR..........32.03   DEPARTURE............+5.29
                         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 morning low temp: 69F; 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 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957
 
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
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien, Peter Volpe,
William Wilson