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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, SEPTEMBER 4, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE NORMAL TEMPERATURES REMAIN IN THE AREA...

Today was another hazy hot and humid day on top of
Great Blue Hill. So far by 1:00 P.M. we had a max
temperature of 88F. This is 12 degrees above the daily
normal of 76F. If temperatures do not go below 73F by
midnight this will be a record breaking high minimum 
temperature. The previous record of 68F was originally
set back in 1937 and 1959. Today wind was light and
variable. The wind began the day coming from the WNW
and then settled on the E/ENE later in the day.
So far we have not had any precipitation in the month
of September for below normal rainfall and above normal
temperatures.
Visibility increased today from 45 to 60 miles by
10:00 A.M. but a distant haze lingering in the area
throughout the day. 

PRELIMINARY STATS FOR AUGUST 2018
 
TEMPERATURE, Deg. F
Avg. Max. 82.4 [+3.2]
Avg. Min. 66.4 [+4.6]
Mean      74.4 [+3.9]
24-hour corrected mean: 73.4
Max. for month: 94F on 29th
Min. for month: 59F on 24th, 25th, and 26th
 
COOLING DEGREE DAYS
Total heating units: 297 [+112] 
Total for the season: 753 [+216]
Total for last season: 607

PRECIPITATION, Inches
Total: 3.94 [-0.09]
Greatest in 24 hrs: 1.31 on the 3rd-4th 

WIND, mph
Avg. uncorrected wind speed: 9.6
Avg. corrected wind speed:   10.2
Prevailing wind direction: SW at 13%
Peak gust and direction: 35 NW on 3rd
35 WNW on 22nd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

BHO Warmest August Mean Temperature (24-hour adjusted), deg F (1885-2018):

1) 74.1 in 2016
2) 73.4 in 2018
3) 72.6 in 2012
4) 72.5 in 1988
5) 72.4 in 2015

BHO Warmest August Average Maximum Temperature, deg F (1885-2018):

1) 85.1 in 2016
2) 83.2 in 2005
3) 83.1 in 1949
4) 82.6 in 2015
5) 82,5 in 1988
   82.5 in 2002
   82.5 in 2012
8) 82.4 in 1944
   82.4 in 2018

BHO Warmest August Average Minimum Temperature, deg F (1885-2018):

1) 66.3 in 2018
2) 65.0 in 2016
3) 64.9 in 2001
4) 64.6 in 2012
5) 64.4 in 2005
   64.4 in 2015


Today's Observations:

7 A.M.
Weather: Scattered cirrostratus, few altocumulus NW-N
Temperature: 75F; Dew Point: 70F; Wind: N AT 7G12 kts 
Sea-level pressure: 30.21 ins. Hg, rising, then more slowly    
Visibility: 45 miles, thin smoke layer ESE-WSW, distant haze 
in all directions 
6-hr Max temp: 76F
6-hr Min temp: 73F
24-hr Precip: 0.00 ins.  
BHO SA 1155 250 SCT 45 230/75/70/3407G12/021/ FEW AC NW-N 
THN K LRY ESE-WSW DSNT HZ ALQDS/ 8/048 51016 10076 20073 

10 A.M.
Weather: Scattered cumulus, scattered cirrostratus,
few towering cumulus N 
Temperature: 85F; Dew Point: 66F; Wind: NNE at 6G13 kts,
Wind: Light
Sea-level pressure: 30.24 ins. Hg, rising, then more slowly 
Visibility: 60 miles, distant haze in all directions 
3-hr Precip: 0.00 ins. 
BHO SA 1455 40 SCT 250 SCT 60 242/85/66/0306G13/024/ FEW 
TCU N DSNT HZ ALQDS WND LGT/ 8/108 51012 

1 P.M.
Weather: Scattered cumulus, broken stratocumulus,
broken cirrostratus 
Temperature: 87F; Dew Point: 62F; Wind: E at 5 kts,
Wind: Light 
Sea-level pressure: 30.23 ins. Hg, falling then steady  
Visibility: 60 miles, distant haze in all directions 
6-hr Max temp: 88F
6-hr Min temp: 75F
6-hr Precip: 0.00 ins.
BHO SA 1755 45 SCT E60 BKN 250 BKN 60 236/87/62/0905/023/ 
DSNT HZ ALQDS WND LGT/ 8/808 56006 10088 20075  

SUMMARY FOR MONDAY, SEPTEMBER 3, 2018 

TEMPERATURE (DEGREES F)
MAX.....92   NORMAL.....76
MIN.....68   NORMAL.....59
MEAN....80   NORMAL.....67

DEPARTURE FROM 30-YEAR NORMAL......................+13
TOTAL DEPARTURE FOR THE MONTH......................+15 [+4.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............15  DEPARTURE.........+11
TOTAL COOLING UNITS FOR THE MONTH..............24  DEPARTURE..........13
TOTAL COOLING UNITS FOR THE SEASON............777  DEPARTURE........+229
TOTAL COOLING UNITS LAST SEASON TO DATE.......607  DEPARTURE........+170

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.....................24 SSW AT 2:18 P.M.*
                   AERO..........................22 SSW AT 2:18 P.M.*
                   ASOS..........................25 S   AT 2:16 P.M.
                   DAVIS.........................28 M** AT 2:16 P.M. RMY 25
FASTEST MILE FOR YESTERDAY.......................17 WSW AT 2:17 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE....................18 S   AT 2:20 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...................18 M** AT 2:19 P.M.
AVERAGE WIND SPEED AND DIRECTION...............10.7 WSW
                   ASOS........................10.9
                   DAVIS.......................11.2 M**
** DAVIS READING HIGH AND DIRECTIONS MALFUNCTIONING  
*  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..........0.00  DEPARTURE......-0.34
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE YEAR..........37.95  DEPARTURE......+2.89
                         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/+4/0.00/531/64        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/0.50/165/20        31 NE  AERO 30 NE  RMY 33 TSTM 
8/19 68/62/65/-5/0.03/527/64        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/+2/0.38/326/40        35 WNW AERO 35 WNW RMY 35 
8/23 76/60/68/-2/0.01/187/23        25 NW  AERO 23 NW  RMY 27
8/24 82/59/71/+1/0.00/754/93        20 SSE AERO 18 SSE RMY 20
8/25 80/59/70/+1/0.00/735/91        20 S   AERO 18 S   RMY 20
8/26 81/59/70/+1/0.00/716/89        21 SSW AERO 20 SSW RMY 21
8/27 86/67/77/+8/0.00/706/88        21 WNW AERO 18 WNW RMY 18
8/28 93/72/83/+14/0.00/672/84       25 WSW AERO 25 WSW RMY 28
8/29 94/75/85/+16/0.00/.../..       25 SW  AERO 24 SW  RMY 27 
8/30 88/67/78/+10/0.00/.../..       23 ENE AERO 21 ENE RMY N/A
8/31 72/60/66/-3/0.00/.../..        24 ENE AERO 23 ENE RMY N/A

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

08/29/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F, 
          BREAKS PREVIOUS RECORD OF 74F SET IN 1948

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

9/1 75/58/67/-1/0.00/.../..        17 NE  AERO 15 NE  RMY 16        
9/2 83/61/72/+4/0.00/.../..        20 SSW AERO 18 SSW RMY N/A 
9/3 92/68/80/+13/0.00/.../..       24 WSW AERO 22 WSW RMY 25 

9/4 Low temp since midnight is 73F; normal low is now 59F

DAILY RECORDS FOR SEPTEMBER

NONE SO FAR 

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

RECORDS FOR SEPTEMBER 4
HIGH 90F IN 1953, 1973
LOW 46F IN 1987
PRECIP 3.22 INCHES IN 1922
PEAK GUST 47 MPH SE IN 1966

RECORDS FOR SEPTEMBER 5
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994

TODAY'S REPORT PREPARED BY: Kaitlin Geagan