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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 16, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT AND HAZY DAY WITH INCREASING CLOUDS...

Temperatures have been above normal today with an 
overnight minimum temperature of 70F, this is 8 degrees
above the daily normal of 62F. The max so far today of
87F degrees is 7 degrees above the daily normal of 80F.
Visibility was obscured by haze today and we could see
15 miles in the morning and slightly farther to 20 miles 
by 1:00 P.M. Wind from the west increased slightly today. 
Pressure increased overnight and the morning started with 
clear skies but clouds increased and we had scattered 
stratocumulus and a few cumulus at the 1:00 P.M. observation. 

August as of now is still running above normal for both precipitation
and temperature. Currently we are +0.93 ins above normal for rainfall 
and +4.7 degrees above normal for temperature.

Today's Observations:

7 A.M.
Weather: Clear, few cirrostratus in all directions 
Temperature: 74F; Dew Point: 68F; Wind: W at 9G13 kts
Sea-level pressure: 30.00 ins. Hg, rising, then more rapidly 
Visibility: 15 miles, Hazy 
6-hr Max temp: 74F
6-hr Min temp: 70F
24-hr Precip: 0.00 ins.  
BHO SA 1155 CLR 15 161/74/68/2709G13/000/ FEW CS ALQDS HAZY/ 
8/008 53018 10074 20070

10 A.M.
Weather: Clear, few cumulus SSW
Temperature: 83F; Dew Point: 70F; Wind: W at 9G12 kts
Sea-level pressure: 30.01 ins. Hg, rising then falling 
Visibility: 15 miles, Hazy
3-hr Precip: 0.00 ins. 
BHO SA 1455 CLR 15 162/83/70/2709G12/001/ FEW CU SSW HAZY/ 
8/100 50001 
 
1 P.M.
Weather: Scattered stratocumulus, few cumulus in all directions  
Temperature: 87F; Dew Point: 69F; Wind: WNW at 9G15 kts
Sea-level pressure: 30.00 ins. Hg, falling then steady
Visibility: 20 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 73F
6-hr Precip: 0.00 ins. 
BHO SA 1755 55 SCT 20 160/87/69/2909G15/000/ FEW CU ALQDS HAZY/ 
8/400 56002 10087 20073

SUMMARY FOR WEDNESDAY, AUGUST 15, 2018 

TEMPERATURE (DEGREES F)
MAX.....86   NORMAL.....80
MIN.....68   NORMAL.....62
MEAN....77   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................+6
TOTAL DEPARTURE FOR THE MONTH........................+64 [+4.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............12  DEPARTURE..........+6
TOTAL COOLING UNITS FOR THE MONTH.............174  DEPARTURE.........+71
TOTAL COOLING UNITS FOR THE SEASON............629  DEPARTURE........+175
TOTAL COOLING UNITS LAST SEASON TO DATE.......526  DEPARTURE........+103

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................20 W AT 10:22 P.M.
                   AERO..........................17 W AT 10:22 P.M.
                   ASOS..........................19 W AT 10:23 P.M.
                   DAVIS.........................20 W AT  8:34 P.M. RMY 19
FASTEST MILE FOR YESTERDAY.......................15 W AT 11:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................15 W AT 11:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................16 W AT 11:59 P.M.
AVERAGE WIND SPEED AND DIRECTION................7.8 W
                   ASOS.........................8.3
                   DAVIS........................8.1 W [270 deg.] 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.03  DEPARTURE......+0.93
                         ASOS..............3.02 
TOTAL PRECIPITATION FOR THE YEAR..........37.04  DEPARTURE......+4.13
                         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/+8/0.70/.../..        25 SSW AERO 25 SSW RMY N/A TSTM 
8/9  86/70/78/+6/0.07/.../..        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/T/.../..           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/-4/0.17/.../..        23 ENE AERO 21 ENE RMY 21 
8/14 83/69/76/+5/0.00/.../..        25 S   AERO 23 S   RMY 24 
8/15 86/68/77/+6/0.00/.../..        20 W   AERO 17 W   RMY 19 

8/16 Low temp since midnight is 70F; 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 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.47 INCHES IN 1926
PEAK GUST 45e MPH N IN 1951

RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962

TODAY'S REPORT PREPARED BY: Kaitlin Geagan