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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, SEPTEMBER 3, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

REMNANTS OF HURRICANE HARVEY BRING RAIN AND FOG

Light rain began shortly after midnight and has continued
on and off through the afternoon.  The total for the day
so far is 0.13 inches with 0.08 inches measured at 7:00AM
and 0.05 inches measured at 1:00PM.  Fog moved in with
heavier rain and obscured the top of Great Blue Hill with
just 1/4 mile visibility at 1:00PM.

This weather system has also brought cool temperatures.
The overnight low of 52F was warmer than the previous two
days, but the maximum by 1:00PM was only 57F which is
nearly 20F below the normal maximum temperature.


PRELIMINARY STATS FOR AUGUST 2017
 
TEMPERATURE, Deg. F
Avg. Max. 80.1 [+0.9]
Avg. Min. 61.4 [-0.4]
Mean      70.8 [+0.3]
24-hour corrected mean: 69.7
Max. for month: 89F on 19th
Min. for month: 55F on 26th, 27th, and 31st
 
COOLING DEGREE DAYS
Total cooling units: 186 [0] 
Total for the season: 607 [+70]
Total for last season: 792

HEATING DEGREE DAYS
Total heating units: 2 [-14] 
Total for the season: 26 [+2]
Total for last season: 10

PRECIPITATION, Inches
Total: 1.60 [-2.43]
Greatest in 24 hrs: 1.09 on the 2nd 

WIND, mph
Avg. uncorrected wind speed: 9.3
Avg. corrected wind speed: 10.0
Prevailing wind direction: S at 18%
Peak gust and direction: 33 S on 18th
 
SUNSHINE:
Campbell-Stokes card minutes: 16,080 minutes of possible 24,780 or 65%
Astronomical total minutes: 16,694 minutes of possible 25,731 or 65%


Today's Observations:

7 A.M.
Weather: Few stratus fractus in all directions, overcast stratus
Temperature: 53F; Dew Point: 51F; Wind: ESE at 8 kts
Sea-level pressure: 30.09 ins. Hg, falling, then more quickly
Visibility: 30 miles
6-hr Max temp: 57F
6-hr Min temp: 52F
24-hr Precip: 0.08 inches
BHO SA 1155 E39 OVC 30 189/53/51/1208/009/ FEW STFRA ALQDS/ 8/7// 58009
MANUAL 70008 ASOS 70009 10057 20052

10 A.M.
Weather: Light drizzle, overcast nimbostratus
Temperature: 55F; Dew Point: 54F; Wind: ESE at 14G22 kts,
Peak Wind: 26 kts (30 MPH) ESE at 9:24AM EST
Sea-level pressure: 30.00 ins. Hg, falling, then more quickly
Visibility: 10 miles, except 20 miles NE-SE
3-hr Precip: 0.03 inches
BHO SA 1455 E22 OVC 10L- 158/55/54/1114G22/000/ VSBY NE-SE 20
PK WND 1226/24/ 8/02/ 58031 MANUAL 6003/ ASOS 60004

1 P.M. 
Weather: Light rain, sky obscurement due to fog
Temperature: 57F; Dew Point: 57F; Wind: E at 7 kts
Sea-level pressure: 29.92 ins. Hg, falling, then more quickly
Visibility: 1/4 mile
6-hr Max temp: 57F 
6-hr Min temp: 53F
6-hr Precip: 0.05 inches
BHO SA 1755 W3 X 1/4R-F 131/57/57/1007/992/ 8//// 58027 MANUAL 6005/
ASOS 60007 10057 20053


SUMMARY FOR SARTURDAY, SEPTEMBER 2, 2017
 
TEMPERATURE (DEGREES F)
MAX.....72   NORMAL.....76
MIN.....46   NORMAL.....59
MEAN....59   NORMAL.....68

DEPARTURE FROM 30-YEAR NORMAL.........................-9
TOTAL DEPARTURE FOR THE MONTH........................-19 [-9.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE MONTH...............0   DEPARTURE..........-8
TOTAL COOLING UNITS FOR THE SEASON............607   DEPARTURE.........+62
TOTAL COOLING UNITS LAST SEASON TO DATE.......797   DEPARTURE........-190

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............6   DEPARTURE..........+5
TOTAL HEATING UNITS FOR THE MONTH..............13   DEPARTURE.........+11
TOTAL HEATING UNITS FOR THE SEASON.............39   DEPARTURE.........+12
TOTAL HEATING UNITS LAST SEASON TO DATE........10   DEPARTURE.........+29

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................18 NNW AT 7:09 A.M.
                   AERO........................18 NNW AT 7:05 A.M.
                   ASOS........................21 NNW AT 7:10 A.M.
                   DAVIS.......................19 NW  AT 4:34 A.M. RMY 21
FASTEST MILE FOR YESTERDAY.....................13 NW  AT 4:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................14 NW  AT 6:47 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................13 WNW AT 4:34 A.M.
AVERAGE WIND SPEED AND DIRECTION..............8.3 WNW
                   ASOS.......................8.3
                   DAVIS......................7.0 W [284 DEG.]
   

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.08  DEPARTURE......-0.03
                         ASOS..............0.08
TOTAL PRECIPITATION FOR THE MONTH..........0.08  DEPARTURE......-0.14
                         ASOS..............0.09
TOTAL PRECIPITATION FOR THE YEAR..........36.36  DEPARTURE......+1.20
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29
8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/831/98               18 S   AERO 18 S   RMY 19 
8/10 86/63/75/+4/T/643/76                  20 S   AERO 18 S   RMY 20
8/11 82/63/73/+2/0.00/666/79               17 S   AERO 16 S   RMY 17
8/12 75/57/66/-5/0.17/294/35               22 SSW*AERO 22 SSW RMY 23
8/13 84/67/76/+5/0.00/796/95               26 WNW AERO 24 WNW RMY 26
8/14 82/67/75/+4/0.00/359/43               14 SSW*AERO 14 S   RMY 15
8/15 79/64/72/+1/T/058/07                  21 S   AERO 21 S   RMY 23
8/16 83/64/74/+3/0.00/731/88               23 NW* AERO 23 NW  RMY 25
8/17 81/58/70/-1/0.00/745/90               15 SSW AERO 14 SSW RMY N/A 
8/18 79/63/71/0/0.01/025/03                33 S   AERO 35 S   RMY 35
8/19 89/65/77/+7/0.00/502/61               23 WSW AERO 23 WSW RMY 25 
8/20 84/66/75/+5/0.00/804/98               23 NW  AERO 25 NW  RMY 27
8/21 85/63/74/+5/0.00/687/84               18 SW  AERO 20 SW  RMY 20
8/22 88/68/78/+8/0.00/481/59               31 S   AERO 35 S   RMY 34  
8/23 83/64/74/+4/0.04/642/79               24 WNW*AERO 25 WNW RMY 27
8/24 80/59/70/0/0.00/778/96                18 WNW*AERO 17 WNW RMY 21
8/25 75/57/66/-3/T/597/74                  21 NW  AERO 21 NW  RMY 23
8/26 75/55/65/-4/0.00/733/91               16 WNW AERO 16 SSE RMY 17
8/27 75/55/65/-4/0.00/770/96               17 ENE*AERO 16 ENE*RMY 18
8/28 74/56/65/-4/0.00/727/91               17 ENE AERO 16 ENE*RMY 18
8/29 68/57/63/-6/..../016/02               18 ENE AERO 16 ENE RMY N/A
8/30 72/57/65/-3/..../468/59               22 NNE AERO 21 NNE RMY 23
8/31 79/55/67/-1/0.00/506/64               23 NW  AERO 24 NW  RMY 27

DAILY RECORDS FOR AUGUST

None so far.

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  68/47/58/-10/0.00/.../..              26 WNW AERO 28 WNW RMY 31
9/2  72/46/59/-9/0.00/.../..               18 NNW AERO 18 NNW RMY 21

9/3  Low temp since midnight is 52F; normal low is now 59F

DAILY RECORDS FOR SEPTEMBER

9/1/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 47F,
        TIES PREVIOUS RECORD SET IN 1975


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

RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1983
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)

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

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle