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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 13, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

BLUE HILL OBSERVATORY STILL IN THE CLOUDS....

We measured 0.28 inches of rain at 7 A.M. The weather 
remained drizzly and foggy all day, with a thicker fog 
moving in around 10 A.M. The denser fog reduced visibility 
from a 1/2 mile to a 1/4 mile. Temperatures remain well below 
seasonable, with a max so far of 68F. That is 12 degrees under
the daily normal of 80F.  

Today's Observations:

7 A.M.
Weather: Light drizzle, overcast nimbostratus
Temperature: 65F; Dew Point: 65F; Wind: NE at 7 kts,
Sea-level pressure: 30.09 ins. Hg, rising, then more slowly
Visibility: 1/2 mile, fog
6-hr Max temp: 66F
6-hr Min temp: 64F
24-hr Precip: 0.28 ins.  
BHO SA 1155 W3 X 1/2L-F 190/65/65/0507/009/ FOG/ 8//// 50004 
MANUAL 70028 ASOS 70027 10066 20064

10 A.M.
Weather: Light drizzle, overcast nimbostratus 
Temperature: 67F; Dew Point: 67F; Wind: NNE at 8 kts
Sea-level pressure: 30.09 ins. Hg, falling steadily 
Visibility: 1/4 mile, fog
3-hr Precip: Trace 
BHO SA 1455 W3 X 1/4L-F 189/67/67/0308/009/ FOG/ 8//// 58001 
6000/

1 P.M.
Weather: Light drizzle, overcast nimbostratus 
Temperature: 68F; Dew Point: 68F; Wind: ENE at 11G16 kts
Sea-level pressure: 30.04 ins. Hg, falling, then more rapidly
Visibility: 1/4 mile, fog 
6-hr Max temp: 68F
6-hr Min temp: 65F
6-hr Precip: Trace 
BHO SA 1755 W3 X 1/4L-F 174/68/68/0611G16/004/ FOG/ 8//// 58015 
6000/ 10068 20065

SUMMARY FOR SUNDAY, AUGUST 12, 2018 

TEMPERATURE (DEGREES F)
MAX.....73   NORMAL.....80
MIN.....66   NORMAL.....62
MEAN....70   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................-1
TOTAL DEPARTURE FOR THE MONTH........................+68 [+5.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............5   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH.............149   DEPARTURE.........+65
TOTAL COOLING UNITS FOR THE SEASON............604   DEPARTURE........+169
TOTAL COOLING UNITS LAST SEASON TO DATE.......498   DEPARTURE........+106

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................23 NNE AT  3:21 P.M.
                   AERO..........................18 NNE AT  3:21 P.M.
                   ASOS..........................22 NE  AT  2:14 P.M.
                   DAVIS.........................21 ENE AT  1:08 P.M. RMY 21
FASTEST MILE FOR YESTERDAY.......................14 NE  AT  1:10 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................15 NNE AT  2:14 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................15 ENE AT  1:10 P.M.
AVERAGE WIND SPEED AND DIRECTION................7.4 NNE
                   ASOS.........................8.1
                   DAVIS........................7.7 ENE [57 deg.] 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.28  DEPARTURE......+0.15
                         ASOS..............0.27
TOTAL PRECIPITATION FOR THE MONTH..........2.86  DEPARTURE......+1.14
                         ASOS..............2.86 
TOTAL PRECIPITATION FOR THE YEAR..........36.87  DEPARTURE......+4.34
                         ASOS.............38.44

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  92/71/82/+10/0.00/.../..       20 W   AERO 16 WSW RMY N/A
8/7  92/73/83/+11/0.00/.../..       25 S   AERO 23 S   RMY 26
8/8  88/71/80/+8/..../.../..        25 SSW AERO 25 SSW RMY N/A TSTM 
8/9  86/70/78/+6/..../.../..        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/..../.../..        17 NW  AERO 16 NW  RMY N/A          
8/11 70/66/68/-3/..../.../..        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/..../.../..        23 NNE AERO 18 NNE RMY 21

8/13 Low temp since midnight is 64F; normal low is now 62F

DAILY RECORDS FOR AUGUST 2018

08/03/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F, 
          BREAKS PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

08/07/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F, 
          BREAKS PREVIOUS RECORD OF 72F SET IN 1988

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

RECORDS FOR AUGUST 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963

RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963

TODAY'S REPORT PREPARED BY: Benjamin Turner