Monday, July 1, 2019

| July 1, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH GOOD VISIBILITY IN THE
AFTERNOON….

We observed a good visibility of 65 miles this
afternoon following a hazy morning. Cloud cover
has consisted of scattered cumulus throughout the
day, with almost clear conditions this morning.
Wind has shifted from north to northwest after
noontime, blowing at an average speed around
10 mph. Yesterday’s rain totaled 0.13 inches,
due to some passing afternoon showers. The high so
far today is 78F, which is a degree below the
daily normal of 79F. The low since midnight is 58F,
three degrees below the daily normal minimum of 61F.

Today’s Observations:

7 A.M.
Weather: Clear, few distant stratus offshore
Temperature: 65F; Dew Point: 60F; Wind: N at 8G19 kts
Sea-level pressure: 29.87 ins. Hg, rising steadily
Visibility: 30 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 58F
24-hr Precip: 0.13 ins.
BHO SA 1155 CLR 30 114/65/60/3508G19/987/ FEW
DSNT ST OFFSHR HAZY/ 8/600 70013 50007 10065 20058

10 A.M.
Weather: Broken cumulus
Temperature: 73F; Dew Point: 59F; Wind: N at 7 kts
Sea-level pressure: 29.89 ins. Hg, rising steadily
Visibility: 40 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E40 BKN 40 120/73/59/3507/989/ 8/100
51006

1 P.M.
Weather: Scattered cumulus
Temperature: 76F; Dew Point: 60F; Wind: NW at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.86 ins. Hg, falling then more slowly
Visibility: 65 miles
6-hr Max temp: 78F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 65 113/76/60/3304/986/ WND L/V/
8/100 58007 10078 20065

SUMMARY FOR SUNDAY, JUNE 30, 2019

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..79
MIN…..59   NORMAL…..61
MEAN….67   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL………………….-3
TOTAL DEPARTURE FOR THE MONTH…………………+10 [+0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH…………..36   DEPARTURE……..-37
TOTAL HEATING UNITS FOR THE SEASON………..6255   DEPARTURE…….-121
TOTAL HEATING UNITS LAST SEASON TO DATE……5916   DIFFERENCE……+339

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH…………..80   DEPARTURE……..-25
TOTAL COOLING UNITS FOR THE SEASON………….88   DEPARTURE……..-41
TOTAL COOLING UNITS LAST SEASON TO DATE…….159   DEPARTURE……..-71

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..31 N   AT  6:24 P.M.
AERO…………………….30 N   AT  6:24 P.M.
ASOS…………………….33 N   AT  6:26 P.M.
DAVIS……………………32 NNW AT  6:25 P.M. RMY 35
FASTEST MILE FOR YESTERDAY………………….24 N   AT  6:26 P.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 N   AT  6:27 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 N   AT  6:26 P.M
AVERAGE WIND SPEED AND DIRECTION……………9.7 NW
ASOS…………………..10.2
DAVIS………………….10.3 NW [321 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.13  DEPARTURE……+0.02
ASOS…………..0.13
TOTAL PRECIPITATION FOR THE MONTH……….4.08  DEPARTURE……-0.23
ASOS…………..4.04
TOTAL PRECIPITATION FOR THE YEAR……….29.87  DEPARTURE……+2.90
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

07/01 Low temp since midnight is 58F; normal low is 61F

*Estimated

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

RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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