Saturday, July 3, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JULY 3, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0412E
SUNSET: 1924E
*PLEASE NOTE AS OF JULY 1, 2021, WE ARE USING 1991-2020
CLIMATOLOGICAL NORMALS (old set 1981-2010 is retired)*
COOLER WITH SOME MUCH-NEEDED RAINFALL AND FOGGY
CONDITIONS….
Today we’ve experienced lower than normal temperatures, which is
a relief from the heat wave earlier on this week. Overnight
rainfall totaled 0.41 inches, with an additional 0.27 inches
falling between 7 A.M. and 1 P.M. Wind is northeasterly at an
average speed of 15 mph and a max gust of 31 mph.
As far as the skies and visibility are concerned, we are socked
in fog. A 1/2 mile is the best we’ve “seen” so far. Intermittent light
rain has remained the theme.
Temperature has only varied 2 degrees over the course of the day
due to the new airmass, overcast skies, and the wind off the
ocean.
The high so far today is 56F, 25 degrees below the daily average
of 81F. This barely whiffs the low maximum record of 55F, set in
1914. The low so far today is 54F, 9 degrees below the daily
average of 63F.
PRELIMINARY STATS FOR JUNE 2021
TEMPERATURE, Deg. F
Avg. Max. 80.9 [+5.9]Avg. Min. 60.4 [+3.3]Mean 70.9 [+4.6]24-hour corrected mean: 70.0
Max. for month: 95F on the 29th
Min. for month: 50F on the 1st
HEATING DEGREE DAYS
Total heating units: 19 [-54]Total for the season: 5597 [-725]Total for last season: 5852
COOLING DEGREE DAYS
Total cooling units: 187 [+75]Total for the season: 197 [+82]Total for last season: 184
PRECIPITATION, Inches
Total: 2.72 [-1.59]Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 10.4 mph
Avg. corrected wind speed: 10.6 mph
Prevailing wind direction: SSW [22%]Peak gust and direction: 51 NW on the 30th
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A
Today’s Observations:
7 A.M.
Weather: Light Rain, Fog (Sky Obscured, Vertical Visibility 300 ft)
Temperature: 56F; Dew Point: 56F; Relative Humidity: 100%
Wind: ENE @ 11G22 kts
Sea-level pressure: 29.84 in. Hg; rising unsteadily
Visibility: 1/2 miles, fog
6-hr Max temp: 56F
6-hr Min temp: 55F
24-hr Precip: 0.41 ins.
BHO SA 1155 X W3 1/2R-F 105/56/56/0711G22/984/ 8//// 70041 52005
10056 20055
10 A.M.
Weather: Light Rain, Fog (Sky Obscured, Vertical Visibility 300 ft)
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: NE @ 12G21 kts
Sea-level pressure: 29.85 in Hg; steady, then rising
Visibility: 1/2 mile, fog
3-hr Precip: 0.14 ins.
BHO SA 1455 X W3 1/2R-F 108/55/55/0512G21/985/ 8//// 6014/ 53003
1 P.M.
Weather: Light Drizzle, Fog (Sky Obscured, Vertical Visibility 300 ft)
Temperature: 54F, Dew point: 54F; Relative Humidity: 100%
Wind: NE @ 16G31 kts Peak Wind: 31 MPH (27 kts) ENE @ 12:54 PM
Sea-level pressure: 29.83 in Hg; falling then steady
Visibility: 1/2 mile, fog
6-hr Max temp: 56F
6-hr Min temp: 54F
6-hr Precip: 0.27 ins.
BHO SA 1755 X W3 1/2L-F 100/54/54/0516G31/983/ PK WND 0527/54/ 8////
6027/ 55008 10056 20054
SUMMARY FOR FRIDAY, JULY 2, 2021
TEMPERATURE (DEGREES F)
MAX…….65 NORMAL…..80
MIN…….55 NORMAL…..62
MEAN……60 NORMAL…..71
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL………-11
TOTAL DEPARTURE FOR THE MONTH………………….-9 [-4.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………… 5 DEPARTURE…….+5
TOTAL HEATING UNITS FOR THE MONTH…………….5 DEPARTURE…….+4
TOTAL HEATING UNITS FOR THE SEASON……………5 DEPARTURE…….+4
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE…….+5
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE…….-7
TOTAL COOLING UNITS FOR THE MONTH…………….8 DEPARTURE…….-5
TOTAL COOLING UNITS FOR THE SEASON………….234 DEPARTURE……+82
TOTAL COOLING UNITS LAST SEASON TO DATE……..198 DEPARTURE……+36
PEAK WIND GUST (MPH):
420C/Official…………..37 NE @ 12:11 P.M.
AEROVANE (south tower)…..36 NE @ 11:52 P.M.
ASOS…………OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………………39 @ 12:11 P.M.
VECTOR #2 (south tower)….38 @ 12:11 P.M.
DAVIS #1……………….36 ENE @ 12:12 P.M.
DAVIS #2 (south tower)…..34 NE @ 12:12 P.M.
RMY……………………39 @ 12:11 P.M.
MERLIN…………………34
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 NE @ 12:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24 @ 12:12 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 ENE @ 12:13 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 ENE @ 12:13 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..23 E @ 12:12 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.8 NE [354 total miles] ASOS…………………OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…………….14.3
DAVIS #1……………..15.1 ENE
DAVIS #2……………..15.0 ENE
RMY………………….13.8 E
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.41 DEPARTURE….+0.30
TOTAL PRECIPITATION FOR THE MONTH………….2.44 DEPARTURE….+2.22
TOTAL PRECIPITATION FOR THE YEAR………….25.82 DEPARTURE….-1.37
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 74/50/62/0/0.00/425/47 20 WSW AERO 24 WSW RMY 22
06/02 80/55/68/+6/0.00/553/61 28 S AERO 25 S RMY 28
06/03 73/56/65/+3/0.01/073/08 29 SSW AERO 29 SSW RMY 29
06/04 77/61/69/+6/0.02/054/06 23 SW AERO 25 WSW RMY 25 TSTM
06/05 87/60/74/+11/0.00/801/88 32 SSW AERO 37 SSW RMY 35
06/06 91/69/80/+17/0.00/819/90 30 WSW AERO 31 WSW RMY 32
06/07 92/69/81/+17/0.00/838/92 31 SSW AERO 35 SSW RMY 34
06/08 92/69/81/+17/0.06/456/50 24 WSW AERO 25 WSW RMY 27 TSTM
06/09 88/70/79/+15/0.02/530/58 21 N AERO 23 NNW RMY 23
06/10 70/53/62/-3/0.00/795/87 28 NE AERO 28 NE RMY 28
06/11 70/51/61/-4/0.13/411/45 21 SSE AERO 22 SSE RMY 22
06/12 72/53/63/-2/0.43/430/47 20 WSW AERO 18 WSW RMY 20
06/13 82/56/69/+4/0.00/860/94 26 SSW AERO 29 SSW RMY 29
06/14 65/56/61/-5/0.63/027/03 28 S AERO 30 SSE RMY 29
06/15 77/61/69/+3/T/357/39 18 NE AERO 20 NE RMY 18 TSTM
06/16 73/56/65/-1/0.00/769/84 27 NNW AERO 31 NNW RMY 27
06/17 77/52/65/-2/0.00/880/96 21 WNW AERO 21 NW RMY 23
06/18 82/56/69/+2/T/789/86 26 WSW AERO 28 WSW RMY 30
06/19 86/63/75/+8/0.09/504/55 30 SW AERO 32 SW RMY 32
06/20 85/63/74/+6/0.00/816/89 24 S AERO 25 SSW RMY 25
06/21 83/65/74/+6/0.00/…/.. 37 SSW AERO 39 SSW RMY 39
06/22 84/58/71/+3/0.68/…/.. 30 NW AERO 31 NW RMY 31 TSTM
06/23 73/52/63/-5/0.00/…/.. 25 NW AERO 24 NW RMY 26
06/24 76/58/67/-2/T/…/.. 25 SE AERO 24 SE RMY 25
06/25 71/57/64/-5/0.11/…/.. 23 S AERO 23 S RMY 23
06/26 81/61/71/+2/0.00/…/.. 36 SSW AERO 37 SSW RMY 38
06/27 85/70/78/+9/0.00/…/.. 38 SW AERO 39 SW RMY 42
06/28 93/70/82/+12/0.00/…/.. 28 SW AERO 28 SW RMY 28
06/29 95/73/84/+14/T/…/.. 26 W AERO 30 W RMY 27 TSTM
06/30 94/69/82/+12/0.54/…/.. 51 NW AERO 53 NW RMY 56 TSTM
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 80/65/73/+2/…./…/.. 22 W AERO 20 WSW RMY 21
07/02 65/55/60/-11/…./…/.. 37 NE AERO 36 NE RMY 39
07/03 The low since midnight is 55F, the daily normal low is 63F
RECORDS FOR JUNE:
JUNE 7: Record high minimum temperature of 69F,
Surpasses previous record of 66F set in 1922 and 1953
JUNE 29: Record high maximum temperature of 95F,
Surpasses previous record of 94F set in 1933
JUNE 29: Record high minimum temperature of 73F,
Surpasses previous record of 71F set in 1999
JUNE 30: Record high maximum temperature of 94F,
Ties previous record of 94F set in 1964
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 99F IN 1911
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949
TODAY’S REPORT PREPARED BY: Benjamin Turner
