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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 16, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY AND HUMID WITH INCREASING WIND AFTER
NOONTIME....

Wind was light and variable before noontime, where it reached a speed
of 12 mph on average. We observed a visibility of 20 miles all day today,
due to hazy condition. Haze limited visibility to the north to 10 miles
at the 7 A.M. and 10 A.M. observations. Temperatures were once again near
seasonable. The max temperature so far today is 83F, 2 degrees 
higher than the daily normal of 81F. The low since midnight is 67F, 
4 degrees higher than the normal minimum of 63F.  

Today's Observations:

7 A.M.
Weather: Clear, few cirrostratus SE-SW
Temperature: 72F; Dew Point: 69F; Wind: N at 1 kt,
Wind: Light and variable 
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly
Visibility: 20 miles except 10 miles NW-ESE, haze 
6-hr Max temp: 72F
6-hr Min temp: 67F
24-hr Precip: 0.00 ins.  
BHO SA 1155 CLR 20 163/72/69/3501/001/ FEW CS SE-SW VSBY NW-ESE 
10 HAZY WND L/V/ 8/005 53008 10072 20067 

10 A.M.
Weather: Scattered cirrostratus, few cumulus in all 
directions 
Temperature: 79F; Dew Point: 69F; Wind: ESE at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.02 ins. Hg, rising then steady
Visibility: 20 miles except 10 miles NW-ESE, haze
3-hr Precip: 0.00 ins. 
BHO SA 1455 250 SCT 20 166/79/69/1102/002/ FEW CU ALQDS VSBY 
NW-ESE 10 HAZY WND L/V/ 8/208 51003 

1 P.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 81F; Dew Point: 70F; Wind: E at 8 kts,
Sea-level pressure: 29.99 ins. Hg, falling, then more rapidly
Visibility: 20 miles, haze
6-hr Max temp: 83F
6-hr Min temp: 72F
6-hr precip: 0.00 ins. 
BHO SA 1755 50 SCT E250 BKN 20 155/81/70/0808/999/ HAZY/ 8/202 
58011 10083 20072  


SUMMARY FOR SUNDAY, JULY 15, 2018 

TEMPERATURE (DEGREES F)
MAX.....84   NORMAL.....81
MIN.....65   NORMAL.....63
MEAN....75   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................+3
TOTAL DEPARTURE FOR THE MONTH........................+47 [+2.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............10   DEPARTURE..........+3
TOTAL COOLING UNITS FOR THE MONTH.............143   DEPARTURE.........+43
TOTAL COOLING UNITS FOR THE SEASON............302   DEPARTURE.........+70
TOTAL COOLING UNITS LAST SEASON TO DATE.......307   DEPARTURE..........-5

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................16 S   AT  1:54 A.M.
                   AERO.........................15 S   AT  1:54 A.M.
                   ASOS.........................17 S   AT  1:56 A.M.
                   DAVIS........................16 S   AT 12:25 P.M. RMY 14
FASTEST MILE FOR YESTERDAY......................10 S   AT 12:20 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................13 S   AT  1:57 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................11 S   AT 12:18 A.M. 
AVERAGE WIND SPEED AND DIRECTION...............6.3 S
                   ASOS........................6.7
                   DAVIS.......................6.7 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......-0.51
                         ASOS..............1.31 
TOTAL PRECIPITATION FOR THE YEAR..........31.46  DEPARTURE......+2.87
                         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 84/65/75/+3/..../.../..        16 S   AERO 15 S   RMY 14

7/16 Low temp since midnight is 67F; 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 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.97 INS IN 2014
WIND 48e MPH SW 1944

RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971

TODAY'S REPORT PREPARED BY: Benjamin Turner