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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 5, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY AND HOT ON TOP OF THE GREAT BLUE HILL…

Temperatures continue to increase into 
the upper 80s yet again this afternoon 
along with dry conditions. Distant Hazy
was observed throughout the day keeping 
visibly at 35 miles. Winds were light 
this morning beginning to increase after 
the 10 A.M observation. The high so far 
today is 86F, which is 6 degrees above 
the average daily maximum of 80F. The 
low since midnight is 69F, 7 degrees 
above the daily normal minimum of 62F.     


PRELIMINARY STATS FOR JUNE 2019

TEMPERATURE, Deg. F
Avg. Max. 75.1 [+0.1]
Avg. Min. 57.3 [+0.2]
Mean      66.2 [+0.1]
24-hour corrected mean: 66.0
Max. for month: 88F on the 28th
Min. for month: 45F on the 4th

COOLING DEGREE DAYS
Total cooling units:    81 [-24]
Total for the season:   89 [-40]
Total for last season: 159

HEATING DEGREE DAYS
Total cooling units:     36  [-37]
Total for the season:  6254 [-122]
Total for last season: 5916

PRECIPITATION, Inches
Total: 4.08 [-0.23]
Greatest in 24 hrs: N/A 

WIND, mph
Avg. uncorrected wind speed: 9.9
Avg. corrected wind speed: 10.5
Prevailing wind direction: S at 17%
Peak gust and direction: 41 W on 3rd  

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


Today's Observations:

7 A.M.
Weather: Broken cirrus
Temperature: 75F; Dew Point: 61F; Wind: W at 7 kts,
Sea-level pressure: 29.89 ins. Hg, rising than, falling
Visibility: 35 miles, distant haze
6-hr Max temp: 78F
6-hr Min temp: 69F
24-hr Precip: 0.00 ins.
BHO SA 1155 E250 BKN 35 125/75/61/2607/989/ 
DNST HZ ALQDS/ 8/002 51007 10078 20069

10 A.M.
Weather: Broken cirrus 
Temperature: 85F; Dew Point: 64F; Wind: S at 6 kts,
Wind: Light
Sea-level pressure: 29.91 ins. Hg, falling than, more quickly
Visibility: 35 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 35 132/85/64/1806/991/ 
DSNT HZ ALQDS WND LGT/ 8/002 58003 

1 P.M.
Weather: Broken cirrus, few cumulus 
Temperature: 86F; Dew Point: 63F; Wind: SSW at 14 kts,
Sea-level pressure: 29.91 ins. Hg, falling than, more quickly
Visibility: 35 miles, distant haze
6-hr Max temp: 86F
6-hr Min temp: 75F
6-hr Precip: 0.00 ins. 
BHO SA 1755 E250 BKN 35 129/86/63/2014/991/ FEW CU DSNT HZ ALQDS/ 8/102 58008 10086 20075


SUMMARY FOR THURSDAY, JULY 4, 2019 

TEMPERATURE (DEGREES F)
MAX.....88   NORMAL.....80
MIN.....68   NORMAL.....62
MEAN....78   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL......................+7  
TOTAL DEPARTURE FOR THE MONTH.....................+19 [+4.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............13   DEPARTURE.........0
TOTAL COOLING UNITS FOR THE MONTH..............41   DEPARTURE........+17
TOTAL COOLING UNITS FOR THE SEASON............129   DEPARTURE........-24
TOTAL COOLING UNITS LAST SEASON TO DATE.......224   DEPARTURE........-95

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................17 SSW AT 11:23 P.M. 
                   AERO.........................MISSING 
                   ASOS.........................17 SW  AT 11:25 P.M
                   DAVIS........................16 S   A  8:03  P.M.  RMY 17
FASTEST MILE FOR YESTERDAY......................13 SSW AT 11:48 P.M
MAXIMUM 2-MINUTE ASOS AVERAGE...................13 SW  AT 11:53 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 WSW AT 1:41  A.M
AVERAGE WIND SPEED AND DIRECTION...............7.0 N
                   ASOS........................7.9
                   DAVIS.......................7.7 WNW [289 deg.]


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......-0.44
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........29.87  DEPARTURE......+2.46
                         ASOS.............29.77

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

06/01 71/54/63/+1/0.00/551/61               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/..../417/46               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/..../753/83               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/717/79               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/..../527/58               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/..../428/47               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/885/97               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/840/93               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/..../712/78               26 SSE AERO 25 SSE RMY 33 
06/11 73/58/66/+1/..../247/27               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/..../869/95               25 SSW AERO 25 S   RMY 28
06/13 55/49/52/-13/..../000/00              36 NE  AERO 35 NE  RMY 35
06/14 72/50/61/-5/0.00/.../..               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/.../..               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/..../.../..                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/..../.../..               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/..../.../..                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/..../.../..               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/..../.../..               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/..../.../..               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/..../.../..               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/..../.../..               30 NW  AERO 25 WNW RMY 29
06/24 84/61/73/+4/..../.../..               22 NW  AERO 21 NW  RMY 22
06/25 73/61/67/-2/0.18/.../..               35 S   AERO 37 S   RMY 37
06/26 77/64/71/+2/0.00/.../..               12 ENE AERO 18 SE  RMY N/A
06/27 81/57/69/0/0.00/.../..                21 NE  AERO 18 NE  RMY N/A
06/28 88/64/76/+6/.../.../..                16 SW  AERO 18 SW  RMY N/A
06/29 80/66/73/+3/.../.../..                25 W   AERO 25 W   RMY 26
06/30 75/59/67/-3/.../.../..                31 N   AERO 30 N   RMY 35

*Estimated

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

07/01 83/58/71/+1/0.00/.../..               21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/.../..               23 W   AERO 23 W   RMY 23
07/03 89/67/78/+7/0.00/.../..               18 S   AERO 18 S   RMY 18
07/04 88/68/78/+7/0.00/.../..               17 SSW AERO M  M   RMY 17
07/05 Low temp since midnight is 68F; normal low is 62F

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

RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 44e N IN 1944

RECORDS FOR JULY 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INS IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999

TODAY'S REPORT PREPARED BY: Nicholas Rousseau