Saturday, July 6, 2019

| July 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JULY 6, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY AND HOT WITH SOUTHWESTERLY WINDS….

Temperatures continue to increase into
the upper 80s yet again this afternoon
along with gradually drying conditions.
Haze limited visibility to 20 miles
throughout the day. Winds remain
southwesterly, with a max gust so far of
25 mph. The high so far today is 89F,
which is 9 degrees above the average
daily maximum of 80F. The low since midnight
is 71F, 9 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 cumulus
Temperature: 77F; Dew Point: 71F; Wind: SW at 11G16 kts,
Sea-level pressure: 29.97 ins. Hg, rising then falling
Visibility: 20 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 72F
24-hr Precip: 0.00 ins.
BHO SA 1155 E40 BKN 20 150/77/71/2311G16/997/ HAZY/
8/800 56008 10077 20072

10 A.M.
Weather: Broken cumulus
Temperature: 83F; Dew Point: 73F; Wind: WSW at 11G18 kts
Sea-level pressure: 29.92 ins. Hg, falling then more quickly
Visibility: 20 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 E30 BKN 20 133/83/73/2511G18/992/ HAZY/
8/800 58017

1 P.M.
Weather: Broken cumulus
Temperature: 88F; Dew Point: 73F; Wind: SW at 15G23 kts,
Sea-level pressure: 29.84 ins. Hg, falling then more quickly
Visibility: 20 miles, hazy
6-hr Max temp: 89F
6-hr Min temp: 77F
6-hr Precip: 0.00 ins.
BHO SA 1755 E30 BKN 20 104/88/73/2215G23/984/ HAZY/
8/800 58029 10089 20077

SUMMARY FOR FRIDAY, JULY 5, 2019

TEMPERATURE (DEGREES F)
MAX…..87   NORMAL…..80
MIN…..69   NORMAL…..62
MEAN….78   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL………………….+7
TOTAL DEPARTURE FOR THE MONTH………………….26 [+5.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13   DEPARTURE………+7
TOTAL COOLING UNITS FOR THE MONTH…………..54   DEPARTURE……..+23
TOTAL COOLING UNITS FOR THE SEASON…………142   DEPARTURE……..-18
TOTAL COOLING UNITS LAST SEASON TO DATE…….241   DEPARTURE……..-99

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 SW  AT 11:32 P.M.
AERO…………………….MISSING
ASOS…………………….23 SW  AT  7:22 A.M.
DAVIS……………………25 SW  AT 11:30 P.M.  RMY 21
FASTEST MILE FOR YESTERDAY………………….16 SW  AT 11:30 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 SW  AT 11:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 SW  AT 11:35 P.M.
AVERAGE WIND SPEED AND DIRECTION……………9.9 S
ASOS…………………….M
DAVIS…………………..9.8 SSW [213 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……-0.55
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….29.87  DEPARTURE……+2.35
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/-5/0.00/540/59               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/898/98               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/…./000/00                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/…./348/38               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/…./000/00                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/…./101/11               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/…./000/00               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/…./018/02               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/…./779/85               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/…./871/95               30 NW  AERO 25 WNW RMY 29
06/24 84/61/73/+4/…./779/85               22 NW  AERO 21 NW  RMY 22
06/25 73/61/67/-2/0.18/083/09               35 S   AERO 37 S   RMY 37
06/26 77/64/71/+2/0.00/559/61               12 ENE AERO 18 SE  RMY N/A
06/27 81/57/69/0/0.00/614/67                21 NE  AERO 18 NE  RMY N/A
06/28 88/64/76/+6/…/870/95                16 SW  AERO 18 SW  RMY N/A
06/29 80/66/73/+3/…/165/18                25 W   AERO 25 W   RMY 26
06/30 75/59/67/-3/…/430/47                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 87/69/78/+7/0.00/…/..               21 SW  AERO M  M   RMY 21

07/06 Low temp since midnight is 71F; normal low is 62F

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

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

RECORDS FOR JULY 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 55 MPH NW IN 1989

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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