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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 1, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM AND HUMID WEATHER WITH HAZE IN THE DISTANCE

The high pressure system trekking east continues to
give us warm temperatures and mostly sunny skies and
is now bringing more moisture into the region.  Dew
points rose into the mid-60s today as temperatures
reached 86F by early afternoon.  Distant haze limited
visibility to 35 miles during each observation.

July 2017 has ended slightly below average on temperature
and below average on precipitation.  The average temperature
of 71.1F was 0.8F below normal.  The month's precipitation 
total of 3.39 in. was 0.63 in. below normal.
   

PRELIMINARY STATS FOR JULY 2017

TEMPERATURE, Deg. F
Avg. Max. 79.8 [-1.0]
Avg. Min. 62.3 [-0.6]
Mean      71.1 [-0.8]
24-hour corrected mean: 70.2
Max. for month: 90F on  19th, 20th, and 21st
Min. for month: 54F on  24th and 25th

HEATING DEGREE DAYS
Total heating units: 24 [+15]
Total for the season: 24 [+15]
Total for last season: 10

COOLING DEGREE DAYS
Total cooling units: 220 [-2]
Total for the season: 421 [+70]
Total for last season: 474

PRECIPITATION, Inches
Total: 3.39 [-0.63]
Greatest in 24 hrs: 1.76 in on 24th-25th

WIND, mph
Avg. uncorrected wind speed: 9.4
Avg. corrected wind speed: 10.0
Prevailing wind direction: W at 13%
Peak gust and direction: 38 NE on 24th  

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


Today's Observations:

7 A.M.
Weather: Sky clear
Temperature: 71F; Dew Point: 62F; Wind: N at 7 kts
Sea-level pressure: 30.04 ins. Hg, rising, then more slowly
Visibility: 35 miles, distant haze in all directions
6-hr Max temp: 71F
6-hr Min temp: 65F
24-hr precip: 0.00 in. 
BHO SA 1155 CLR 35 173/71/62/3507/004/ SKC DSNT HZ ALQDS/ 
51009 10071 20065

10 A.M.
Weather: Few cumulus SW-NNE
Temperature: 80F; Dew Point: 63F; Wind: NE at 5 kts,
Wind speed: Light
Sea-level pressure: 30.06 ins. Hg, rising then steady
Visibility: 35 miles, distant haze in all directions
BHO SA 1455 CLR 35 179/80/63/0405/006/ FEW CU SW-NNE DSNT 
HZ ALQDS WND LGT/ 8/100 51006

1 P.M. 
Weather: Scattered cumulus
Temperature: 85F; Dew Point: 63F; Wind: estimated S at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 35 miles, distant haze in all directions
6-hr Max temp: 86F 
6-hr Min temp: 71F
BHO SA 1755 34 SCT 35 171/85/63/E1802/003/ DSNT HZ ALQDS 
WND L/V/ 8/100 58008 10086 20071


SUMMARY FOR MONDAY, JULY 31, 2017
 
TEMPERATURE (DEGREES F)
MAX.....85   NORMAL.....81
MIN.....60   NORMAL.....63
MEAN....73   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................+1
TOTAL DEPARTURE FOR THE MONTH........................-12 [-0.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............8   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE MONTH.............220   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE SEASON............421   DEPARTURE.........+70
TOTAL COOLING UNITS LAST SEASON TO DATE.......474   DEPARTURE.........-53

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................18 SSW AT 5:48 P.M.
                   AERO........................20 SSW AT 5:48 P.M.
                   ASOS........................21 SSW AT 5:37 P.M.
                   DAVIS.......................20 SSW AT 5:48 P.M. RMY 20
FASTEST MILE FOR YESTERDAY.....................14  S  AT 5:49 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................15  S  AT 8:24 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14 SSW AT 5:49 P.M.
AVERAGE WIND SPEED AND DIRECTION..............7.6 SW
                   ASOS.......................7.8
                   DAVIS......................6.0 SW [222 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.39  DEPARTURE......-0.63
                         ASOS..............3.41
TOTAL PRECIPITATION FOR THE YEAR..........34.76  DEPARTURE......+3.77
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  85/67/76/+6/T/439/48                  35 S   AERO 37 S   RMY 38
7/2  87/69/78/+8/T/785/86                  25 W*  AERO 28 W*  RMY 27
7/3  85/67/76/+5/0.00/894/98               28 W*  AERO 29 W   RMY 30
7/4  84/62/73/+2/0.00/783/86               17 W   AERO 17 W   RMY 18
7/5  82/62/72/+1/0.00/855/94               20 S   AERO 20 ENE RMY 20
7/6  82/60/71/+0/0.00/664/73               21 SSW AERO 22 SSW RMY 21
7/7  71/60/66/-5/0.63/000/00               28 ENE AERO 28 ENE RMY 27
7/8  84/61/73/+1/0.15/463/51               30 SW* AERO 32 SSW RMY 33  TSTM
7/9  81/60/71/-1/0.00/897/99               26 W   AERO 26 W   RMY 26
7/10 85/63/74/+2/T/751/83                  25 SW  AERO 25 S   RMY 26
7/11 82/66/74/+2/0.25/253/28               24 S   AERO 24 S   RMY N/A
7/12 85/68/77/+5/0.43/325/36               23 NE  AERO 22 NE  RMY 23  TSTM
7/13 68/55/62/-10/0.03/000/00              28 NNE AERO 28 NE  RMY 29
7/14 63/56/60/-12/0.02/000/00              15 E   AERO 14 E   RMY 14
7/15 80/60/70/-2/0.00/296/33               18 S   AERO 16 S   RMY 18
7/16 87/64/76/+4/0.00/852/95               18 SSE AERO 16 E   RMY 17
7/17 84/68/76/+4/0.00/680/76               25 S   AERO 25 S*  RMY 25
7/18 85/68/77/+5/0.07/500/56               23 S   AERO 23 S   RMY 23
7/19 90/70/80/+8/0.00/794/89               22 SW  AERO 22 SW* RMY 22
7/20 90/70/80/+8/0.00/623/70               21 WSW AERO 22 WSW RMY 21
7/21 90/68/79/+7/0.00/835/94               26 W   AERO 26 W   RMY 27
7/22 87/70/79/+7/T/266/30                  20 WNW AERO 20 WNW RMY N/A
7/23 72/61/67/-5/T/681/77                  33 NE  AERO 32 NE  RMY 33
7/24 62/54/58/-14/1.74/000/00              38 NE  AERO 37 ENE RMY 38
7/25 63/54/59/-13/0.03/203/23              23 NNE AERO 21 NNE RMY N/A
7/26 79/55/67/-5/0.00/703/80               21 S*  AERO 22 SSE RMY N/A
7/27 72/59/66/-6/0.04/.../..               21 SSW AERO 23 SW  RMY 22 
7/28 82/64/73/+1/0.00/.../..               16 W   AERO 17 N   RMY N/A
7/29 67/56/62/-10/0.00/.../..              30 NNE AERO 32 NNE RMY 33
7/30 76/55/66/-6/0.00/.../..               18 SSW*AERO 18 SSW RMY 19
7/31 85/60/73/+1/0.00/.../..               18 SSW AERO 20 SSW RMY 20

8/1  Low temp since midnight is 65F; normal low is now 63F


DAILY RECORDS FOR JULY

7/24/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 62F,
         TIES PREVIOUS RECORD SET IN 1904 AND TIED IN 1964


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

RECORDS FOR AUGUST 1
HIGH 97F IN 1917
LOW 49F IN 1891
PRECIP 3.61 INCHES IN 1927
PEAK GUST 41 MPH NNW IN 1985

RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM - Tied with 8/10/1949]
LOW 50 IN 1929, 1947
PRECIP 1.59 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle