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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 14, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

SKY BEGINS TO CLEAR AFTER DAYS OF RAIN AND DENSE MORNING FOG...

The sky cleared throughout the day today after multiple days
of overcast skies with rainfall. Yesterday afternoon 0.17 ins. 
fell on Great Blue hill. So far today has been dry. Temperatures 
return to more seasonable after three days of below normal 
temperatures. So far we recorded a high of 82F by 1:00 P.M. 
This is 2 degrees above the daily normal of 80F. The wind has 
been light again today and shifted overnight from the ENE to 
coming from the SSE. Humidity remained high this morning at 
100% with the dense fog but dropped down to 66% by 1:00 P.M. 
Dew points still remained around 70F today for damp feeling air.
August as of now is still running above normal for both precipitation
and temperatures. Currently we are +1.19 ins above normal for rainfall 
and +4.7 degrees above normal for temperature.

Today's Observations:

7 A.M.
Weather: Dense fog
Temperature: 71F; Dew Point: 71F; Wind: SSE at 5 kts,
Wind: Light
Sea-level pressure: 29.95 ins. Hg, rising, then more slowly
Visibility: 1/16 mile 
6-hr Max temp: 72F
6-hr Min temp: 69F
24-hr Precip: 0.17 ins.  
BHO SA 1155 W2 X 1/16F 141/71/71/1505/995/ WND LGT/ 
8//// 51012 MANUAL 70017 ASOS 70016 10072 20069

10 A.M.
Weather: Scattered towering cumulus, broken stratocumulus,
broken altostratus 
Temperature: 77F; Dew Point: 74F; Wind: SE at 5 kts,
Wind: Light
Sea-level pressure: 29.93 ins. Hg, falling then more slowly 
Visibility: 10 miles distant fog in all directions
3-hr Precip: 0.00 ins. 
BHO SA 1455 14 SCT E20 BKN E110 BKN 10 137/77/74/1305/993/ 
DSNT FG ALQDS WND LGT/ 8/51/ 57004
 
1 P.M.
Weather: Scattered stratocumulus, Scattered tower cumulus,
broken cirrostratus 
Temperature: 81F; Dew Point: 69F; Wind: S at 4 kts,
Wind: Light
Sea-level pressure: 29.89 ins. Hg, falling, then more rapidly
Visibility: 20 miles, except 10 miles N-NNE, distant fog in
all directions 
6-hr Max temp: 82F
6-hr Min temp: 71F
6-hr Precip: 0.00 ins. 
BHO SA 1755 20 SCT 50 SCT E300 BKN 20 122/81/69/1904/989/ 
DSNT FG ALQDS VSBY 10 N-NNE WND LGT/ 8/208 58015 10082 20071

SUMMARY FOR MONDAY, AUGUST 13, 2018 

TEMPERATURE (DEGREES F)
MAX.....69   NORMAL.....80
MIN.....64   NORMAL.....62
MEAN....67   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................-4
TOTAL DEPARTURE FOR THE MONTH........................+64 [+4.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE MONTH.............151   DEPARTURE.........+60
TOTAL COOLING UNITS FOR THE SEASON............606   DEPARTURE........+164
TOTAL COOLING UNITS LAST SEASON TO DATE.......509   DEPARTURE.........+97

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................23 ENE AT 5:04 P.M.
                   AERO..........................21 ENE AT 5:00 P.M.
                   ASOS..........................23 NE  AT 5:07 P.M.
                   DAVIS.........................23 NE  AT 5:05 P.M. RMY 21
FASTEST MILE FOR YESTERDAY.......................15 ENE AT 5:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................15 ENE AT 7:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................16 ENE AT 5:07 P.M.
AVERAGE WIND SPEED AND DIRECTION................9.6 ENE
                   ASOS........................10.4
                   DAVIS.......................10.0 ENE [72 deg.] 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.17  DEPARTURE......+0.05
                         ASOS..............0.16
TOTAL PRECIPITATION FOR THE MONTH..........3.03  DEPARTURE......+1.19
                         ASOS..............3.02 
TOTAL PRECIPITATION FOR THE YEAR..........37.04  DEPARTURE......+4.39
                         ASOS.............38.60

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/199/23           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/761/88       30 SW  AERO 28 SW  RMY 31 
8/3  88/74/81/+9/0.19/492/57        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/301/35        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/815/95        20 W   AERO 18 W   RMY 19
8/6  92/71/82/+10/0.00/822/96       20 W   AERO 16 WSW RMY N/A
8/7  92/73/83/+11/0.00/682/80       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 69/64/67/-4/..../.../..        23 ENE AERO 21 ENE RMY 21 

8/14 Low temp since midnight is 69F; normal low is now 62F

DAILY RECORDS FOR AUGUST 2018

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

08/07/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F, 
          BREAK 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 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963

RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011 
PEAK GUST 44e MPH S IN 1941

TODAY'S REPORT PREPARED BY: Kaitlin Geagan