Tuesday, July 2, 2019

| July 2, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 2, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH GOOD VISIBILITY IN THE
AFTERNOON….

We observed a good visibility of 70 miles today
with limited haze. Cloud cover has decreased
slightly since this morning, with the sun breaking
through around noontime. Wind has remained westerly,
blowing at an average speed around 10 mph. The high so
far today is 79F, which is the same as the average
daily normal. The low since midnight is 65F,
three 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: 64.8
Max. for month: 88F on the 28th
Min. for month: 45F on the 4th

HEATING DEGREE DAYS
Total heating units: 36 [-37]
Total for the season: 6254 [-122]
Total for last season: 69

COOLING DEGREE DAYS
Total cooling units:   80 [-25]
Total for the season:  88 [-41]
Total for last season: 159

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 altostratus
Temperature: 69F; Dew Point: 62F; Wind: W at 7 kts
Sea-level pressure: 29.81 ins. Hg, rising steadily
Visibility: 70 miles
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 E200 BKN 70 095/69/62/2807/981/ 8/010 53004
10069 20065

10 A.M.
Weather: Broken altostratus
Temperature: 73F; Dew Point: 61F; Wind: W at 8 kts
Sea-level pressure: 29.78 ins. Hg, falling steadily
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E200 BKN 70 087/73/61/2708/978/ 8/010 58008

1 P.M.
Weather: Scattered altostratus, broken cirrus
Temperature: 79F; Dew Point: 62F; Wind: W at 12G17 kts
Sea-level pressure: 29.75 ins. Hg, falling then more slowly
Visibility: 70 miles
6-hr Max temp: 79F
6-hr Min temp: 69F
6-hr Precip: 0.00 ins.
BHO SA 1755 150 SCT E250 BKN 70 079/79/62/2712G17/975/
8/012 58008 10079 20069

SUMMARY FOR MONDAY, JULY 1, 2019

TEMPERATURE (DEGREES F)
MAX…..83   NORMAL…..79
MIN…..58   NORMAL…..61
MEAN….71   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL………………….+1
TOTAL DEPARTURE FOR THE MONTH………………….+1 [+0.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH……………6   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE SEASON………….94   DEPARTURE……..-41
TOTAL COOLING UNITS LAST SEASON TO DATE…….177   DEPARTURE……..-83

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 NNW AT  6:13 A.M.
AERO…………………….21 NNW AT  6:15 A.M.
ASOS…………………….22 NNW AT  6:15 A.M.
DAVIS……………………21 NW  AT  6:10 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….16 NW  AT  2:21 A.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 W   AT  3:14 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 WNW AT  2:23 A.M
AVERAGE WIND SPEED AND DIRECTION……………8.8 NW
ASOS……………………9.7
DAVIS…………………..9.5 NW [309 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……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….29.87  DEPARTURE……+2.79
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/+1/0.00/879/96               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/…./…/..               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 88/64/75/+5/…/…/..                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 Low temp since midnight is 65F; normal low is 62F

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

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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