BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 15, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

A SUNNY DAY WITH LIGHT WINDS ATOP GREAT BLUE HILL....

We observed a near seasonable July day, along with light winds all the 
way throughout. The max temperature so far today is 84F, 3 degrees 
higher than the daily normal of 81F. The low since midnight is 65F, 
2 degrees higher than the normal minimum of 63F. The wind has remained 
under 12 miles per hour for most of the day.  

Today's Observations:

7 A.M.
Weather: Overcast altocumulus, few stratus fractus in all
directions
Temperature: 67F; Dew Point: 66F; Wind: S at 5 kts,
Wind: Light
Sea-level pressure: 30.00 ins. Hg, rising, then more slowly
Visibility: 40 miles
6-hr Max temp: 67F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.  
BHO SA 1155 E110 OVC 40 160/67/66/1805/000/ FEW STFA ALQDS 
WND LGT/ 8/72/ 53004 10067 20065

10 A.M.
Weather: Scattered altocumulus, broken cirrostratus,
few cumulus in all directions 
Temperature: 76F; Dew Point: 68F; Wind: W at 2 kts,
Wind: Light and variable
Sea-level pressure: 29.98 ins. Hg, falling, then more slowly
Visibility: 40 miles
3-hr Precip: 0.00 ins. 
BHO SA 1455 110 SCT E250 BKN 40 153/76/68/2702/998/ FEW CU ALQDS 
WND L/V 8/088 56007

1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 83F; Dew Point: 69F; Wind: NE at 4 kts,
Wind: Light
Sea-level pressure: 29.98 ins. Hg, falling, then more quickly
Visibility: 40 miles
6-hr Max temp: 84F
6-hr Min temp: 67F
6-hr precip: 0.00 ins. 
BHO SA 1755 35 SCT E250 BKN 40 149/83/69/0404/998/ WND LGT/ 8/208 
58004 10084 20067


SUMMARY FOR SATURDAY, JULY 14, 2018 

TEMPERATURE (DEGREES F)
MAX.....80   NORMAL.....81
MIN.....61   NORMAL.....63
MEAN....71   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................-1
TOTAL DEPARTURE FOR THE MONTH........................+44 [+2.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............6   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH.............133   DEPARTURE.........+40
TOTAL COOLING UNITS FOR THE SEASON............292   DEPARTURE.........+70
TOTAL COOLING UNITS LAST SEASON TO DATE.......302   DEPARTURE.........-10

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................18 S   AT 6:28 P.M.
                   AERO.........................16 S   AT 6:28 P.M.
                   ASOS.........................19 S   AT 6:30 P.M.
                   DAVIS........................18 S   AT 6:30 P.M. RMY 19
FASTEST MILE FOR YESTERDAY......................12 S   AT 6:31 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................14 S   AT 6:32 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 S   AT 6:31 P.M. 
AVERAGE WIND SPEED AND DIRECTION...............7.0 S
                   ASOS........................7.3
                   DAVIS.......................6.8 S [180 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.29  DEPARTURE......-0.37
                         ASOS..............1.31 
TOTAL PRECIPITATION FOR THE YEAR..........31.46  DEPARTURE......+3.01
                         ASOS.............33.04

PRELIMINARY CLIMATE SUMMARY FOR JULY 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
M:    Missing data

7/01 94/72/83/+13/0.00/.../..       21 ESE AERO 18 ESE RMY 19 
7/02 90/68/79/+9/0.00/.../..        21 S   AERO 21 S   RMY 22
7/03 94/69/82/+11/0.00/.../..       20 SSW AERO 18 SW  RMY 19 TSTM
7/04 89/73/81/+10/0.00/.../..       17 NE  AERO 15 NE  RMY 16
7/05 91/73/82/+11/0.00/.../..       29 SSW AERO 28 SSW RMY N/A
7/06 80/59/70/-1/0.56/.../..        37 NNW AERO 38 SW  RMY 40 TSTM
7/07 78/54/66/-5/0.00/.../..        22 N   AERO 18 N   RMY N/A 
7/08 83/57/70/-2/0.00/.../..        23 S   AERO 21 S   RMY 22  
7/09 88/60/74/+2/0.00/.../..        23 SW  AERO 23 SW  RMY 24 
7/10 91/63/77/+5/..../.../..        24 W   AERO 22 W   RMY N/A
7/11 73/62/68/-4/..../.../..        28 NE  AERO 25 NE  RMY 27 TSTM
7/12 77/56/67/-5/0.00/.../..        16 NW  AERO 15 NW  RMY N/A 
7/13 84/61/73/+1/0.00/.../..        23 SSE AERO 23 SSE RMY 24
7/14 80/61/71/-1/0.00/.../..        18 S   AERO 16 S   RMY 19

7/15 Low temp since midnight is 65F; normal low is now 63F


DAILY RECORDS FOR JULY 2018

07/01/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 72F, 
          TIES PREVIOUS RECORD OF 72F SET IN 1968


DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002

RECORDS FOR JULY 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.97 INS IN 2014
WIND 48e MPH SW 1944

TODAY'S REPORT PREPARED BY: Benjamin Turner