Sunday, August 1, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, AUGUST 1, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0435E
SUNSET: 1905E
GOOD VISIBILITY WITH SOME CLOUDS MOVING IN THIS
AFTERNOON….JULY WAS THE SECOND WETTEST ON RECORD…
We observed good visibility today, it being around 75 miles.
Skies became mostly cloudy by the 10 A.M. observation, with
almost clear skies being seen earlier this morning. Wind was
southerly for the most part, increasing slightly as the day
went on.
For a bit of perspective, current weather conditions are normal
for early to mid fall!
With today being the beginning of a new month, let’s dive into
precipitation. The monthly total for July is 11.59″ which is
only 0.09″ from breaking the all-time wettest July on record
here.
BHO Wettest Julys, inches (1885-2021)
1) 11.67 in 1938
2) 11.59 in 2021
3) 10.68 in 1988
4) 10.43 in 1921
5) 9.52 in 1915
6) 8.47 in 1889
7) 7.62 in 2009
8) 7.55 in 1916
The high so far today is 75F, 7 degrees below the daily
normal maximum of 82F. The low so far today is 58F, which
is 6 degrees below the daily normal minimum of 64F.
———————————————–
Today’s Observations:
7 A.M.
Weather: Few cirrus
Temperature: 64F; Dew Point: 50F; Relative Humidity: 60%
Wind: SW @ 6 kts
Sea-level pressure: 29.98 in. Hg; rising steadily
Visibility: 80 miles
6-hr Max temp: 64F
6-hr Min temp: 58F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 152/64/50/2206/998/ FEW CI ALQDS/ 8/001
53008 10064 20058
10 A.M.
Weather: Broken altostratus, few cumulus SE-NW,
break in overcast overhead
Temperature: 71F; Dew Point: 60F; Relative Humidity: 69%
Wind: SW @ 7 kts
Sea-level pressure: 29.96 in Hg; falling steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 90 BKN 75 146/71/60/2107/996/ FEW CU SE-W-NW
BINOVC OVHD/ 8/110 58006
1 P.M.
Weather: Broken altocumulus, few cumulus
Temperature: 75F, Dew point: 57F; Relative Humidity: 54%
Wind: S @ 11G15 kts
Sea-level pressure: 29.91 in Hg; falling steadily
Visibility: 75 miles
6-hr Max temp: 75F
6-hr Min temp: 64F
6-hr Precip: 0.00 ins.
BHO SA 1755 170 BKN 75 131/75/57/1811G15/991/ FEW CU ALQDS/
8/150 58015 10075 20064
SUMMARY FOR SATURDAY, JULY 31, 2021
TEMPERATURE (DEGREES F)
MAX…….74 NORMAL…..82
MIN…….52 NORMAL…..64
MEAN……63 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-10
TOTAL DEPARTURE FOR THE MONTH…………………-113 [-3.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….2 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………28 DEPARTURE…….+28
TOTAL HEATING UNITS FOR THE SEASON…………..28 DEPARTURE…….+28
TOTAL HEATING UNITS LAST SEASON TO DATE……….1 DEPARTURE…….+27
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-8
TOTAL COOLING UNITS FOR THE MONTH…………..153 DEPARTURE…….-95
TOTAL COOLING UNITS FOR THE SEASON………….379 DEPARTURE……..-8
TOTAL COOLING UNITS LAST SEASON TO DATE……..487 DEPARTURE……-108
PEAK WIND GUST (MPH):
Official……………….24 WNW @ 3:33 A.M.
AEROVANE (south tower)…..25 WNW @ 3:33 A.M.
VECTOR #2 (south tower)….27 @ 3:33 A.M.
DAVIS #2 (south tower)…..24 WNW @ 3:29 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY…………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 WNW @ 3:28 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 3:34 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 NW @ 3:30 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.9 W [237 total miles] VECTOR #2…………….10.7
DAVIS #2……………..10.7 WNW
RMY……………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.12
TOTAL PRECIPITATION FOR THE MONTH…………11.59 DEPARTURE….+8.12
TOTAL PRECIPITATION FOR THE YEAR………….34.97 DEPARTURE….+4.53
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/+2/0.74/155/17 22 W AERO 20 WSW RMY 21
07/02 65/55/60/-11/1.49/000/00 37 NE AERO 36 NE RMY 39
07/03 56/54/55/-17/1.98/000/00 41 NE AERO 44 NE RMY 45 TSTM
07/04 66/54/60/-12/0.16/191/21 26 ENE AERO 23 ENE RMY 26
07/05 74/53/64/-8/0.01/546/60 26 SSW AERO 28 SSW RMY 27
07/06 87/66/77/+5/0.26/255/28 37 W AERO 48 W RMY 38 TSTM
07/07 88/88/77/+5/0.77/699/77 63 NW AERO 75 NW RMY 70 TSTM
07/08 67/59/63/-9/0.38/109/12 46 W AERO 46 W RMY 51 TSTM
07/09 73/62/68/-5/3.02/163/18 40 WNW AERO 44 WNW RMY 43
07/10 71/63/67/-6/0.07/109/12 23 NE AERO 21 NNE RMY 22
07/11 81/61/71/-2/T/325/36 21 SW AERO 19 S RMY N/A
07/12 67/61/64/-9/1.01/000/00 31 ENE AERO 31 ENE RMY N/A
07/13 66/60/63/-10/0.02/000/00 19 E AERO 18 E RMY N/A
07/14 80/62/71/-2/0.01/216/24 19 S AERO 18 S RMY N/A
07/15 88/67/78/+5/0.00/844/94 19 WSW AERO 18 SSW RMY N/A
07/16 90/70/80/+7/0.04/609/68 36 NNW AERO 39 NNW RMY N/A TSTM
07/17 78/64/71/-2/0.34/394/44 26 ENE AERO 25 ENE RMY N/A TSTM
07/18 74/63/69/-4/0.15/000/00 22 NE AERO 22 NE RMY N/A TSTM
07/19 71/63/67/-6/0.07/027/03 17 ENE AERO 17 ENE RMY N/A
07/20 83/64/74/+1/0.00/730/82 23 NW AERO 23 NW RMY N/A
07/21 79/62/71/-2/0.16/577/65 26 NNW AERO 23 NNW RMY N/A TSTM
07/22 79/58/69/-4/T/656/74 20 WNW AERO 20 WNW RMY N/A
07/23 79/62/71/-2/0.00/708/80 22 S AERO 21 S RMY N/A TSTM
07/24 78/59/69/-4/0.00/830/94 19 S AERO 18 S RMY N/A
07/25 71/64/68/-5/0.08/009/01 40 SSW AERO 41 SSW RMY N/A
07/26 87/67/77/+4/0.01/765/87 27 WSW AERO 25 WNW RMY N/A
07/27 87/65/76/+3/0.56/…/.. 55 NW AERO 58 NW RMY N/A
07/28 72/61/67/-6/0.06/…/.. 18 NNE AERO 18 NNE RMY N/A
07/29 77/61/69/-4/0.19/…/… 39 S AERO 40 S RMY N/A
07/30 78/58/68/-5/0.01/…/.. 31 NW AERO 31 NW RMY N/A
07/31 74/52/63/-10/…./…/.. 24 WNW AERO 25 WNW RMY N/A
08/01 The low since midnight is 58F, the daily normal low is 64F
RECORDS FOR JULY:
JULY 2: Record daily precipitation of 1.49″,
Surpasses previous record of 1.42″ set in 1986
JULY 3: Record daily precipitation of 1.98″,
Surpasses previous record of 1.36″ set in 1985
JULY 7: Record peak gust of 63 MPH,
Surpasses previous record of 55 MPH set in 1989
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 1
HIGH 97F IN 1917
LOW 49F IN 1891
PRECIP 3.61 INCHES IN 1927
PEAK GUST 41 MPH NNW IN 1985
RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM – Tied with 8/10/1949]LOW 50F IN 1929, 1947
PRECIP 1.94 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006
TODAY’S REPORT PREPARED BY: Benjamin Turner
