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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 7, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

SECOND CONSECUTIVE DAY WITH HIGH TEMPERATURES OVER 90F....

Yesterday's high temperature and today's high so far is 92F.
This is 4 degrees below the record of 95F and 11 degrees 
above the daily normal of 81F for today and yesterday. So far 
today has been a dry day with a mostly sunny skies. The morning 
started clear but the cloud cover increase as pressure began to 
decrease throughout the day. The overnight minimum temperature 
so far is 73F, if temperatures do no go below 73F before midnight 
this will become the new daily high minimum record. The previous 
record of 72F was set back in 1988. Wind today was mostly from the 
southwest and today has been slightly windier than yesterday. 
Visibility was obscured today due to a thick haze in the area, and 
we observed an increase from 15 miles to 30 miles by 1:00 P.M. 
The dew points and humidity remained high today with a high dew 
point of 74F at 10:00 A.M.   

PRELIMINARY STATS FOR JULY 2018

TEMPERATURE, Deg. F
Avg. Max. 83.9 [+3.1]
Avg. Min. 63.7 [+0.8]
Mean      73.8 [+1.9]
24-hour corrected mean: 73.6
Max. for month: 94F on  1st and 3rd
Min. for month: 54F on  7th

COOLING DEGREE DAYS
Total cooling units:   296 [+74]
Total for the season:  455 [+104]
Total for last season: 421

PRECIPITATION, Inches
Total: 3.84 [-0.18]
Greatest in 24 hrs: 1.36 in on 17th-18th

WIND, mph
Avg. uncorrected wind speed: 9.8
Avg. corrected wind speed: 10.4
Prevailing wind direction: S at 19%
Peak gust and direction: 41 SSW on 26th  

SUNSHINE:
Campbell-Stokes card minutes: 18642 minutes of possible 26682 or 70%
Astronomical total minutes: 19402 minutes of possible 27744 or 70%

BHO Warmest July Mean Temperature (24-hr corrected mean), 
deg F (1885-2018):

1)  75.1 in 2010
2)  74.9 in 1952
3)  74.1 in 1994
    74.1 in 2013
5)  74.0 in 2011
    74.0 in 2016
7)  73.8 in 1999
8)  73.6 in 2018
9)  73.5 in 1949
10) 73.2 in 2012

Today's Observations:

7 A.M.
Weather: Clear, few cirrus SSW
Temperature: 78F; Dew Point: 71F; Wind: SW at 7G13 kts
Sea-level pressure: 29.99 ins. Hg, falling, then more slowly 
Visibility: 15 miles, hazy 
6-hr Max temp: 78F
6-hr Min temp: 73F
24-hr Precip: 0.00 ins.  
BHO SA 1155 CLR 15 156/78/71/2307G13/999/ FEW CI SSW HAZY/ 
6/001 51007 10078 20073

10 A.M.
Weather: Clear, few cumulus E-N few cirrus E and SSW
Temperature: 87F; Dew Point: 72F; Wind: SW at 7 kts
Sea-level pressure: 29.97 ins. Hg, falling then steady  
Visibility: 20 miles, hazy
3-hr Precip: 0.00 ins.  
BHO SA 1455 CLR 20 149/87/72/2307/997/ FEW CU E-N FEW CI E AND 
SSW HAZY/ 6/101 56007    

1 P.M.
Weather: Scattered cumulus, scattered cirrus 
Temperature: 92F; Dew Point: 70F; Wind: SW at 10G19 kts
Sea-level pressure: 29.93 ins. Hg, falling then more rapidly 
Visibility: 30 miles, distant haze
6-hr Max temp: 92F
6-hr Min temp: 78F
6-hr precip: 0.00 ins.
BHO SA 1755 50 SCT 250 SCT 30 134/92/70/2310G19/993/ DSNT HZ/ 6/101 
58015 10092 20078

SUMMARY FOR MONDAY, AUGUST 6, 2018 

TEMPERATURE (DEGREES F)
MAX.....92   NORMAL.....81
MIN.....71   NORMAL.....63
MEAN....78   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL........................+10
TOTAL DEPARTURE FOR THE MONTH........................+42 [+6.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............17   DEPARTURE.........+10
TOTAL COOLING UNITS FOR THE MONTH..............84   DEPARTURE.........+41
TOTAL COOLING UNITS FOR THE SEASON............539   DEPARTURE........+145
TOTAL COOLING UNITS LAST SEASON TO DATE.......468   DEPARTURE.........+71

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................20 W   AT 12:03 A.M.
                   AERO..........................16 WSW AT  5:02 P.M.** 
                   ASOS..........................18 W   AT 12:05 A.M.
                   DAVIS.........................19 M   AT 12:04 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY.......................14 W   AT 12:04 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................14 W   AT 10:10 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................15 M   AT 12:06 A.M.
AVERAGE WIND SPEED AND DIRECTION................8.5 WSW
                   ASOS.........................9.2
                   DAVIS........................9.0 *
* DAVIS DIRECTION MALFUNCTIONING YESTERDAY MORNING 
**Last of multiple occurrences 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.35  DEPARTURE......+0.45
                         ASOS..............1.39 
TOTAL PRECIPITATION FOR THE YEAR..........35.36  DEPARTURE......+3.65
                         ASOS.............36.97

PRELIMINARY CLIMATE SUMMARY FOR JULY-AUGUST 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/+13/0.00/667/73       21 ESE AERO 18 ESE RMY 19 
7/02 90/68/79/+9/0.00/858/94        21 S   AERO 21 S   RMY 22
7/03 94/69/82/+11/0.00/657/72       20 SSW AERO 18 SW  RMY 19 TSTM
7/04 89/73/81/+10/0.00/884/97       17 NE  AERO 15 NE  RMY 16
7/05 91/73/82/+11/0.00/865/95       29 SSW AERO 28 SSW RMY N/A
7/06 80/59/70/-1/0.56/018/02        37 NNW AERO 38 SW  RMY 40 TSTM
7/07 78/54/66/-5/0.00/900/99        22 N   AERO 18 N   RMY N/A 
7/08 83/57/70/-2/0.00/890/98        23 S   AERO 21 S   RMY 22  
7/09 88/60/74/+2/0.00/852/94        23 SW  AERO 23 SW  RMY 24 
7/10 91/63/77/+5/0.10/751/83        24 W   AERO 22 W   RMY N/A
7/11 73/62/68/-4/0.63/705/78        28 NE  AERO 25 NE  RMY 27 TSTM
7/12 77/56/67/-5/0.00/867/96        16 NW  AERO 15 NW  RMY N/A 
7/13 84/61/73/+1/0.00/568/63        23 SSE AERO 23 SSE RMY 24
7/14 80/61/71/-1/0.00/540/60        18 S   AERO 16 S   RMY 19
7/15 84/65/75/+3/T/521/58           16 S   AERO 15 S   RMY 14 
7/16 83/67/75/+3/0.00/682/76        23 S   AERO 23 S   RMY 23 
7/17 88/67/78/+6/1.34/430/48        31 SW  AERO 30 SW  RMY 32 TSTM 
7/18 81/63/72/0/0.02/769/86         21 NW  AERO 22 NW  RMY 23 
7/19 80/56/68/-4/0.00/874/98        21 S   AERO 17 SSE RMY 19 
7/20 83/62/73/1/0.00/864/97         21 SE  AERO 17 ESE RMY 19
7/21 76/59/68/-4/0.00/738/83        23 ENE AERO 20 ENE RMY N/A
7/22 76/63/69/-3/0.29/009/01        29 ESE AERO 28 ESE RMY N/A
7/23 82/71/77/+5/0.09/327/37        32 S   AERO 30 S   RMY 32 
7/24 85/72/79/+7/T/698/79           31 S   AERO 29 S   RMY 29 
7/25 82/71/77/+5/0.11/159/18        35 SSE AERO 32 SSE RMY N/A 
7/26 83/69/76/+5/0.69/158/18        41 SSW AERO 39 SSW RMY N/A TSTM
7/27 88/69/79/+7/0.00/605/69        25 S   AERO 23 SSW RMY 26
7/28 87/71/79/+7/0.01/569/65        28 S   AERO 26 S   RMY 29
7/29 82/67/75/+3/0.00/768/88        18 W   AERO 16 W   RMY 18
7/30 82/64/73/+1/0.00/470/54        18 W   AERO 16 W   RMY 17
7/31 86/63/75/+3/0.00/739/85        16 SSW AERO 15 W   RMY N/A

DAILY RECORDS FOR JULY 2018

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

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  82/66/74/+2/T/.../..           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/.../..       30 SW  AERO 28 SW  RMY 31 
8/3  88/74/81/+9/0.19/.../..        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/.../..        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/.../..        20 W   AERO 18 W   RMY 19
8/6  92/71/+10/0.00/.../..          20 W   AERO 16 WSW RMY N/A

8/6 Low temp since midnight is 71F; normal low is now 63F

DAILY RECORDS FOR AUGUST 2018

08/04/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F, 
          BREAK PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

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

RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975

RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958

TODAY'S REPORT PREPARED BY: Kaitlin Geagan