BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 2, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
ANOTHER DAY OF WELL ABOVE NORMAL TEMPERATURES
 
For a fourth straight day, well above normal temperatures are the
main story at the summit today.  By 1PM, the maximum observed temperature
so far was 86F.  After tying our record high temperature for the past two
days, we will likely fall a few degrees short of it today, as today's
record is 91F set in 1895.  Yesterday's minimum temperature of 69F also
broke the record high minimum temperature of 68F for the date.  Some rain
is expected tonight and tomorrow as a weather system moves through.
Behind this precipitation, more seasonable temperatures are expected
for the rest of the week.
 
Winds have been breezy out of the southwest today, and increasing
throughout the day, with a peak gust so far of 41mph.  Visibility has
once again been limited by haze as it has been held to 40 miles or less. 
The sky has been mostly clear today, with just a few cirrus clouds
observed this morning and some cumulus, moderate cumulus, and even a
cumulonimbus cloud developing this afternoon.
 
MAY 2013 PRELIMINARY STATISTICS:
(departures relative to 1981-2010 average)
 
TEMPERATURE:
Average Max Temp:  69.5F [+3.2F]
Average Min Temp:  48.2F [+0.4F]
Mean Temp:  58.9F [+1.8F]
24-hr. Corr. Mean Temp:  58.2F
Max Temp:  92F on 31st
Min Temp:  37F on 5th and 26th
Total heating degree day units (month):    212 [ -56] *NCDC method
Total heating degree day units (season): 5,734 [-569] *start July 1 (NCDC)
 
PRECIPITATION:
Total precipitation:  3.71 inches [-0.40 inches]
Greatest 24-hr precipitation:  N/A
Total snowfall:  0.0 [-0.0 inches]
Total seasonal snowfall:  99.0 inches [+36.3 inches]
 
WIND:
Avg wind speed:  11.0 MPH
Avg corrected wind speed:  11.3 MPH
Prevailing wind direction: S [18%]
Peak gust: 44 MPH NW on 26th
Peak fastest mile: 33 MPH SSW on 11th
 
SUNSHINE:
Astronomical minutes: N/A
Campbell-Stokes card minutes: N/A
 
Today's observations:
 
7 A.M.
Weather: Clear, few cirrus WNW-ENE
Temperature: 70F; Dew Point: 65F; Wind: SSW at 12 kts
Sea-level pressure: 29.88 ins. Hg, rising then steady
Visibility: 35 miles, distant haze
6-hr min. temp: 64F
BHO SA 1155 CLR 35 119/70/65/2012/988/ FEW CI WNW-ENE DSNT HZ
THN K LYR SSE-NNW/ 8/001 51002 10070 20064
 
10 A.M.
Weather: Clear, few cumulus W-NW
Temperature: 80F; Dew Point: 66F; Wind: SSW at 17G22 kts
Sea-level pressure: 29.85 ins. Hg, falling then falling more slowly
Visibility: 35 miles, distant haze
BHO SA 1455 CLR 35 109/80/66/2117G22/985/ FEW CU W-NW DSNT HZ/
8/100 56010
 
1 P.M.
Weather: Clear, few cumulus fractus SW, cumulus and moderate cumulus
distant WSW-NW, cumulonimbus distant WNW-NW
Temperature: 85F; Dew Point: 65F; Wind: SSW at 20G30 kts,
Wind: Peak wind of 30 kts from the SSW at 12:51PM
Sea-level pressure: 29.82 ins. Hg, falling then falling more rapidly
Visibility: 40 miles, distant haze   
6-hour max temp: 86F
BHO SA 1755 CLR 40 097/85/65/2020G30/982/ FEW CUFRA SW
CU AND MDT CU DSNT WSW-NW CB DSNT WNW-NW DSNT HZ PK WND 2030/51/
8/300 58012 10086 20070
 
WEATHER SUMMARY FOR SATURDAY, JUNE 1, 2013
 
TEMPERATURE (DEGREES F)
MAX.....90     NORMAL.....71
MIN.....69     NORMAL.....53
MEAN....80     NORMAL.....62
 
DEPARTURE FROM 30-YEAR NORMAL...................+18
TOTAL DEPARTURE FOR THE MONTH...................+18 [+18.0 DEGREES/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY.............0   DEPARTURE..........-5
TOTAL HEATING UNITS FOR THE MONTH.............0   DEPARTURE..........-5
TOTAL HEATING UNITS FOR THE SEASON.........5734   DEPARTURE........-574
TOTAL HEATING UNITS LAST SEASON TO DATE....4893   DIFFERENCE.......+841
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............30 SW  AT  10:57 A.M. *
                   AERO....................32 SW  AT  10:57 A.M.
                   ASOS....................32 SW  AT  10:59 A.M.
                   DAVIS...................30 SW  AT  10:09 A.M. RMY: 33
FASTEST MILE FOR YESTERDAY.................24 SW  AT   2:47 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE..............22 SW  AT   2:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............22 SSW AT  11:34 A.M.
AVERAGE WIND SPEED AND DIRECTION.........14.8 SW
                   ASOS..................14.1
                   DAVIS.................13.6 SW [219 deg]
*last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE...........-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE...........-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........20.09  DEPARTURE...........-2.74
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
                       
PRELIMINARY CLIMATE SUMMARY FOR MAY 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
                             
5/1  67/45/56/+3/0.00/845/100        18 E   AERO 16 MPH E   RMY 17
5/2  75/43/59/+6/T/669/79            29 NE  AERO 26 MPH NE  RMY 29
5/3  54/42/48/-5/0.00/706/83         24 NE  AERO 25 MPH NE  RMY 28
5/4  55/40/48/-6/0.00/843/99         21 NE  AERO 23 MPH NE  RMY 23
5/5  58/37/48/-6/0.00/752/88         17 ENE AERO 17 MPH ENE RMY 20
5/6  66/40/53/-1/0.00/600/70         17 S   AERO 18 MPH S   RMY 20
5/7  77/50/64/+9/0.00/807/94         21 S   AERO 23 MPH S   RMY 25
5/8  71/55/63/+8/0.42/112/13         31 SSE AERO 35 MPH SSE RMY 35 TSTM
5/9  66/56/61/+6/0.41/078/09         16 NE  AERO 16 MPH NE  RMY 18 TSTM
5/10 79/54/67/+12/T/333/63           18 S   AERO 21 MPH S   RMY N/A
5/11 70/56/63/+7/0.06/026/03         43 SSW AERO 44 MPH SSW RMY 46
5/12 71/47/59/+3/0.05/339/39         30 W   AERO 32 MPH W   RMY 32
5/13 60/41/51/-5/0.00/821/94         25 WSW AERO 28 MPH WSW RMY 30
5/14 58/38/48/-9/T/385/44            22 W   AERO 24 MPH W   RMY 25
5/15 65/41/53/-4/0.02/456/52         35 S   AERO 38 MPH S   RMY 40
5/16 80/51/66/+9/0.00/844/96         40 W   AERO 45 MPH W   RMY 42
5/17 69/50/60/+3/0.00/872/99         24 NW  AERO 28 MPH NW  RMY 27
5/18 73/47/60/+2/0.00/689/78         21 SE  AERO 24 MPH SE  RMY 24
5/19 71/50/61/+3/0.11/407/46         21 S   AERO 23 MPH S   RMY 24
5/20 81/54/68/+10/0.01/496/56        21 S   AERO 21 MPH S   RMY N/A
5/21 81/49/65/+6/0.14/506/57         29 NE  AERO 31 MPH NE  RMY 32 TSTM
5/22 66/48/57/-3/0.04/009/01         27 WNW AERO 25 MPH WNW RMY N/A
5/23 74/53/64/+5/0.09/036/04         35 S   AERO 39 MPH S   RMY 40
5/24 68/49/59/0/0.57/000/00          33 S   AERO 35 MPH S   RMY N/A
5/25 50/39/45/-15/0.59/000/00        32 NW  AERO 35 MPH NW  RMY 32
5/26 58/37/48/-12/0.03/332/37        44 NW  AERO 44 MPH NW  RMY 45
5/27 70/41/56/-4/0.00/880/98         33 WNW AERO 33 MPH WNW RMY 36
5/28 74/55/65/+4/0.00/639/71         20 S   AERO 20 MPH S   RMY 21
5/29 71/56/61/+3/1.17/045/05         25 W   AERO 27 MPH W   RMY 27 TSTM
5/30 86/63/75/+14/0.00/839/93        25 W   AERO 25 MPH W   RMY 27
5/31 92/68/80/+19/0.00/805/89        25 SW  AERO 25 MPH SW  RMY 27
 
6/1  90/69/80/+18/0.00/.../..        30 SW  AERO 32 MPH SW  RMY 33
 
6/2 morning low temp: 64F; the normal low is now 53F
 
DAILY RECORDS FOR MAY 2013
5/26 - TIED DAILY RECORD MINIMUM TEMPERATURE OF 37F;
      previous record of 37F set in 1972.
 
5/31 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 92F;
      previous record of 92F set in 1937.
 
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;
     previous record of 68F set in 1944, 1987
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 2
HIGH 91F IN 1895
LOW 41F IN 1907, 1929
PRECIP 2.36 INS IN 1982
SNOWFALL TRACE IN 1907 (IP)
PEAK GUST 63 MPH NW IN 2000
 
RECORDS FOR JUNE 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien