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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 29, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER HAZY, HOT, AND HUMID ON TOP OF GREAT BLUE HILL...

We had a close to record breaking above normal temperature 
day, so far with an overnight low of 75F. If temperatures
do not reach below 75F by midnight then this we be a
record breaking high minimum temperature. The record of 74F
was set back in 1948. Our high maximum temperature so far 
today is 94F, this is 1 degree below the daily record of 95F
set back in 1953. Although we had a lingering haze in the
area, visibility increased from 20 miles to 35 miles by
1:00 P.M. This was due to a drop in humidity down to 46%
at 1:00 P.M. Dew points remained high today being 72F for
most of our observations but did drop for a bit down to
69F around 1:00 P.M. Wind from the SW was light in the 
morning but became moderate in the afternoon with a few
gusts so far of 22 kts (25 MPH). Cloud cover also increased
as we saw a drop in pressure throughout the day and we had 
scattered cumulus and cirrostratus at our 1:00 P.M. 
observation. 

Today's Observations:

7 A.M.
Weather: Clear, few cirrostratus WSW-N 
Temperature: 79F; Dew Point: 72F; Wind: WSW at 6 kts,
Wind: Light 
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly    
Visibility: 25 miles, haze aloft 
6-hr Max temp: 79F
6-hr Min temp: 75F
24-hr Precip: 0.00 ins.  
BHO SA 1155 CLR 25 161/79/72/2606/001/ FEW CS WSW-N HZ 
ALF WND LGT/ 8/005 51011 10079 20075

10 A.M.
Weather: Clear, few cirrostratus WSW-NW
Temperature: 88F; Dew Point: 72F; Wind: SW at 6 kts,
Wind: Light 
Sea-level pressure: 30.00 ins. Hg, falling then steady
Visibility: 30 miles, haze aloft
3-hr Precip: 0.00 ins. 
BHO SA 1455 CLR 30 160/88/72/2306/000/ FEW CS WSW-NW HZ ALF 
WND LGT/ 8/005 55001 

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus 
Temperature: 94F; Dew Point: 69F; Wind: SW at 13G21 kts
Sea-level pressure: 29.95 ins. Hg, falling, then more slowly  
Visibility: 35 miles, haze aloft 
6-hr Max temp: 94F
6-hr Min temp: 79F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 200 SCT 35 143/94/69/2313G21/995/ HZ ALF/ 
8/105 56017 10094 20079

SUMMARY FOR TUESDAY, AUGUST 28, 2018 

TEMPERATURE (DEGREES F)
MAX.....93   NORMAL.....77
MIN.....72   NORMAL.....60
MEAN....83   NORMAL.....69

DEPARTURE FROM 30-YEAR NORMAL........................+14
TOTAL DEPARTURE FOR THE MONTH.......................+101 [+3.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............18  DEPARTURE.........+13
TOTAL COOLING UNITS FOR THE MONTH.............264  DEPARTURE.........+91
TOTAL COOLING UNITS FOR THE SEASON............719  DEPARTURE........+195
TOTAL COOLING UNITS LAST SEASON TO DATE.......605  DEPARTURE........+114

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................25 WSW AT 6:54 P.M.*
                   AERO..........................25 WSW AT 6:54 P.M.*
                   ASOS..........................28 SW  AT 6:54 P.M.
                   DAVIS.........................31 WSW AT 6:54 P.M. RMY 28 
FASTEST MILE FOR YESTERDAY.......................14 WSW AT 6:49 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................15 SW  AT 3:15 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................15 WSW AT 3:15 P.M.
AVERAGE WIND SPEED AND DIRECTION...............11.4 WSW
                   ASOS........................10.7
                   DAVIS.......................11.4 WSW [240 DEG]
* LAST OF MULTIPLE OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.11
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.95  DEPARTURE......+0.25
                         ASOS..............3.94 
TOTAL PRECIPITATION FOR THE YEAR..........37.96  DEPARTURE......+3.45
                         ASOS.............39.52

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/+8/0.70/460/54        25 SSW AERO 25 SSW RMY N/A TSTM 
8/9  86/70/78/+6/0.07/509/60        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/0.00/651/77        17 NW  AERO 16 NW  RMY N/A      
8/11 70/66/68/-3/0.34/000/00        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/0.39/000/00        23 NNE AERO 18 NNE RMY 21
8/13 69/64/67/-4/0.17/000/00        23 ENE AERO 21 ENE RMY 21 
8/14 83/69/76/+5/0.00/502/60        25 S   AERO 23 S   RMY 24 
8/15 86/68/77/+6/0.00/509/61        20 W   AERO 17 W   RMY 19 
8/16 87/70/79/+8/0.00/515/62        20 W   AERO 18 W   RMY 20 
8/17 83/67/75/+4/..../531/64        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/..../165/20        31 NE  AERO 30 NE  RMY 33 TSTM 
8/19 68/62/65/-5/..../527/64        30 NE  AERO 30 NE  RMY 32
8/20 72/61/67/-3/0.00/591/72        28 ENE AERO 25 ENE RMY 27 
8/21 69/61/65/-5/T/155/19           20 ESE AERO 17 ESE RMY N/A 
8/22 82/62/72/+2/..../326/40        35 WNW AERO 35 WNW RMY 35 
8/23 76/60/68/-2/..../.../..        25 NW  AERO 23 NW  RMY 27
8/24 82/59/71/+1/0.00/.../..        20 SSE AERO 18 SSE RMY 20
8/25 80/59/70/+1/0.00/.../..        20 S   AERO 18 S   RMY 20
8/26 81/59/70/+1/0.00/.../..        21 SSW AERO 20 SSW RMY 21
8/27 86/67/77/+8/0.00/.../..        21 WNW AERO 18 WNW RMY 18
8/28 93/72/83/+14/0.00/.../..       25 WSW AERO 25 WSW RMY 28 

8/28 Low temp since midnight is 72F; normal low is now 60F

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 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S IN 1949

RECORDS FOR AUGUST 30
HIGH 94F IN 1953
LOW 39F IN 1965
PRECIP 2.75 INCHES IN 1936
PEAK GUST 43 MPH NW IN 1965

TODAY'S REPORT PREPARED BY: Kaitlin Geagan