Wednesday, July 3, 2019

| July 3, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 3, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY AND HOT WITH CONDITIONS DRYING OUT IN
THE AFTERNOON….

We observed a visibility of 30 miles today with
significant haze. Conditions have dried throughout
the day, with a humidity below 40% at the 1 P.M.
observation. Wind has remained light, shifting
from north to northwest. The highest gust so far
today is 12 mph. The high so far today is 88F, which
is 8 degrees above the average daily maximum. The low
since midnight is 67F, five 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 cirrocumulus
Temperature: 74F; Dew Point: 64F; Wind: N at 9 kts
Sea-level pressure: 29.85 ins. Hg, rising steadily
Visibility: 30 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 67F
24-hr Precip: 0.00 ins.
BHO SA 1155 E260 BKN 30 108/74/64/3509/985/ HAZY/
8/009 51017 10074 20067

10 A.M.
Weather: Scattered altostratus, few cumulus
Temperature: 82F; Dew Point: 59F; Wind: NW at 5 kts,
Wind: Light
Sea-level pressure: 29.88 ins. Hg, rising steadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 220 SCT 30 118/82/59/3205/988/ FEW CU ALQDS
HAZY WND LGT/ 8/110 51010

1 P.M.
Weather: Scattered cumulus
Temperature: 88F; Dew Point: 56F; Wind: WNW at 7 kts
Sea-level pressure: 29.88 ins. Hg, steady
Visibility: 30 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 74F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 30 118/88/56/2907/988/ HAZY/ 8/100
58000 10088 20074

SUMMARY FOR TUESDAY, JULY 2, 2019

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..79
MIN…..65   NORMAL…..62
MEAN….74   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL………………….+4
TOTAL DEPARTURE FOR THE MONTH………………….+5 [+2.3 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9   DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH…………..15   DEPARTURE………+3
TOTAL COOLING UNITS FOR THE SEASON…………103   DEPARTURE……..-38
TOTAL COOLING UNITS LAST SEASON TO DATE…….191   DEPARTURE……..-88

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..23 W   AT  1:42 P.M.
AERO…………………….23 W   AT  1:43 P.M.
ASOS…………………….23 W   AT  1:44 P.M.
DAVIS……………………24 W   AT  1:34 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………….16 W   AT  2:03 P.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 W   AT  4:14 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 W   AT  2:03 P.M
AVERAGE WIND SPEED AND DIRECTION…………..10.2 W
ASOS…………………..10.6
DAVIS………………….11.1 W [269 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……-0.22
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….29.87  DEPARTURE……+2.68
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 88/64/76/+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 Low temp since midnight is 67F; normal low is 62F

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

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

RECORDS FOR JULY 4
HIGH 98F IN 1911, 1919, 1949
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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