Friday, August 4, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, AUGUST 4, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0440E
SUNSET: 1900E
OVERCAST SKIES AND WINDY CONDITIONS KEEP AUGUST FEELING
COOLER THAN NORMAL ON GREAT BLUE HILL…
Today has been mostly overcast and cloudy with only a brief
peek of the sun early this morning. A strong breeze out of the
SSW and the overcast skies have aided in keeping the temperature
just below normal. However, the higher dew points have made a
come back to the hill, but despite that it’s been a pleasant day
overall.
The dew point continues to increase and was in the mid to upper
60’s today. Although it’s starting to feel a bit sticky, the
overcast skies and breezy conditions have helped it not feel as
uncomfortable.
Wind has been very active today on the hill, with an average of
about 14 mph so far. Our highest gust was 29 mph during the
4am hour, but we have frequently had gusts in the mid 20’s
throughout the morning and afternoon. The wind has predominantly
been out of the SSW and S for much of the day.
The visibility has been limited today with the recent increase of
dew points to the area causing hazy conditions as well as some smoke
aloft this morning. We started off with 50 miles of visibility this
morning and have had about 30 miles for the remainder of the day.
The maximum temperature so far today is 79F, this is 3 degrees
below the normal high of 82F. The minimum temperature today is
62F, which is 2 degrees below the normal low of 64F.
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PRELIMINARY STATS FOR JULY 2023
TEMPERATURE, Deg. F
Avg. Max. 82.7 [+1.0]
Avg. Min. 65.7 [+1.9]
Mean 74.2 [+1.5]
24-hour corrected mean: 73.5
Max. for month: 92F on the 6th
Min. for month: 56F on the 30th
HEATING DEGREE DAYS
Total heating units: 0 [-007]
Total for the season: 0 [-007]
Total for last season: 0
COOLING DEGREE DAYS
Total cooling units: 294 [+046]
Total for the season: 422 [+035]
Total for last season: 507
PRECIPITATION, Inches
Total: 9.59 [+6.12]
Greatest in 24 hrs: 2.56 on the 16th
SNOWFALL, Inches
Total: 0.0 [0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 8.6 mph
Avg. corrected wind speed: 9.3 mph
Prevailing wind direction: South-southwest [23%]
Peak gust and direction: 61 WNW on the 27th
SUNSHINE:
Campbell-Stokes card minutes: 15312 of a possible 26682, or 57%
Astronomical total minutes: 15913 of a possible 27749, or 57%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Overcast, few stratus fractus all quadrants, thin smoke
layer aloft NE-E-SSE, sun dimly visible
Temperature: 65F; Dew Point: 62F; Relative Humidity: 90%
Wind: SSW @ 8G22 kts
Sea-level pressure: 1015.8 mb; 30.00 in. Hg: falling, then more
rapidly
Visibility: 50 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 62F
24-hr Precip: Trace
BHO SA 1155 E150 OVC 50 158/65/62/1908G22/000/ FEW STFRA ALQDS
THN K LYR ALF NE-E-SSE SUN DMLY VSBL HAZY/ 8/72/ 58006 6000/ 70000
10065 20062
10 A.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 72F; Dew Point: 66F; Relative Humidity: 81%
Wind: SSW @ 11G20 kts
Sea-level pressure: 1015.7 mb; 29.99 in. Hg: falling, then more
slowly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 25 SCT E220 BKN 30 157/72/66/2011G20/999/ HAZY/ 8/205/
56001
1 P.M.
Weather: Scattered cumulus, broken stratocumulus, broken altocumulus,
few stratus fractus NE-E-SE
Temperature: 75F; Dew Point: 64F; Relative Humidity: 70%
Wind: SSW @ 11G22 kts
Sea-level pressure: 1015.3mb; 29.98 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 65F
6-hr Precip: 0.00 inches
BHO SA 1755 30 SCT E40 BKN 90 BKN 220 BKN 30 153/75/64/2011G22/998/
FEW STFRA NE-E-SE HAZY/ 8/735 57004 10079 20065
————————————————————–
SUMMARY FOR THURSDAY, AUGUST 3, 2023
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..82
MIN…….59 NORMAL…..64
MEAN……69 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-4
TOTAL DEPARTURE FOR THE MONTH…………………-18 [-6.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….4 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………….6 DEPARTURE…….-18
TOTAL COOLING UNITS FOR THE SEASON………….428 DEPARTURE…….+17
TOTAL COOLING UNITS LAST SEASON TO DATE……..546 DEPARTURE……-118
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E32 SSW @ 03:53 P.M.
VECTOR #1 (1-Sec)……….34 SSW @ 04:54 P.M.
VECTOR #2 (1-Sec)……….35 SSW @ 04:55 P.M.
DAVIS #1……………….33 S @ 05:52 P.M.
DAVIS #2 ………………42 S @ 05:43 P.M.
RMY #1 (Instantaneous)…..34 SSW @ 03:54 P.M.
RMY #2 (Instantaneous)…..35 SSW @ 04:55 P.M.
MERLIN…………………31 S
RICHARDS (C5C) (Inst)……33 @ 03:54 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 SSW @ 05:44 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 05:45 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 04:00 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 S @ 03:27 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………26 S @ 01:45 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 SSW @ 04:14 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 SSW @ 04:00 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 05:45 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..12.4 SSW [297 total miles]
VECTOR #1…………………12.4
VECTOR #2…………………13.3
DAVIS #1………………….12.0 SSW
DAVIS #2………………….13.3 SSW
RMY #1……………………12.2 SSW
RMY #2……………………13.4 SSW
RICHARDS (C5C)…………….11.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.39
TOTAL PRECIPITATION FOR THE YEAR…………..34.77 DEPARTURE…..+3.68
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
7/1 80/61/71/0/0.00/567/62 17 SSE VEC1 16 SSE RMY 17
7/2 74/63/69/-2/0.34/027/03 35 S VEC1 35 S RMY 35
7/3 79/63/72/-1/0.40/265/29 18 NNW VEC1 18 NNW RMY 17 TSTM
7/4 71/65/68/-4/0.81/000/00 17 NE VEC1 18 NE RMY 17 TSTM
7/5 88/66/77/+5/0.00/720/79 17 S VEC1 16 SE RMY 15
7/6 92/69/81/+9/0.00/683/75 23 SSW VEC1 22 SSW RMY 23
7/7 87/70/78/+6/0.00/763/84 23 SW VEC1 22 SW RMY 23
7/8 84/70/77/+5/0.00/463/51 20 W VEC1 20 W RMY 19
7/9 81/69/75/+2/T/200/22 17 ESE VEC1 18 E RMY 17
7/10 71/66/69/-4/0.68/000/00 22 ESE VEC1 21 ESE RMY 22
7/11 85/62/74/+1/0.00/796/88 24 WNW VEC1 25 WNW RMY 25
7/12 91/70/81/+8/0.00/713/79 21 WSW VEC1 22 SSW RMY 20
7/13 88/67/78/+5/0.13/695/77 35 SSW VEC1 35 SSW RMY 38 TSTM
7/14 78/65/72/-1/0.18/342/38 29 SSW VEC1 32 SSW RMY 32 TSTM
7/15 86/70/78/+5/T/548/61 28 SSW VEC1 30 SSW RMY 29 TSTM
7/16 76/71/74/+1/2.56/000/00 40 S VEC1 41 SSW RMY 48 TSTM
7/17 86/71/79/+6/0.00/699/78 21 WSW VEC1 21 W RMY 23
7/18 84/70/77/+4/0.00/402/45 28 SSW VEC1 28 SSW RMY 27
7/19 83/68/76/+3/0.00/554/62 23 W VEC1 23 W RMY 22
7/20 82/64/73/+0/0.00/838/94 17 NNE VEC1 17 SE RMY 18
7/21 79/62/71/-2/1.99/178/20 30 NW VEC1 31 NW RMY 32 TSTM
7/22 81/64/73/0/0.00/656/74 15 W VEC1 14 W RMY 16
7/23 85/65/75/+2/0.00/805/91 21 NW VEC1 20 W RMY 21
7/24 85/67/76/+3/0.00/706/80 23 S VEC1 24 S RMY 24
7/25 85/64/75/+2/1.02/441/50 29 NNE VEC1 30 NNW RMY 29 TSTM
7/26 85/63/74/+1/0.00/817/93 23 W VEC1 23 W RMY 23
7/27 88/68/78/+5/0.43/368/42 61 WNW VEC1 63 WNW RMY 66 TSTM
7/28 88/68/78/+5/0.00/840/96 23 SW VEC1 23 SW RMY 23
7/29 88/62/75/+2/1.04/279/32 35 NNE VEC1 37 NNE RMY 36 TSTM
7/30 75/56/66/-7/0.00/827/95 24 N VEC1 24 NNW RMY 25
7/31 80/59/70/-3/0.01/721/83 35 WNW VEC1 34 WNW RMY 35
DAILY RECORDS
07/16/2023: NEW RECORD DAILY PRECIPITATION OF 2.56 INCHES;
SURPASSES THE PREVIOUS RECORD OF 0.98 INCHES IN 2014
07/16/2023: NEW RECORD HIGH DAILY MINIMUM TEMPERATURE OF 71F;
TIES THE RECORD OF 71F SET IN 1901, 1958, 1968, AND 2013
07/27/2023: NEW RECORD PEAK WIND GUST OF 61 MPH WNW;
BEATS THE OLD RECORD OF 47 MPH ENE SET IN 1984
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
8/1 76/58/67/-6/0.00/…/.. 24 NW VEC1 24 NW RMY 24
8/2 75/54/65/-8/0.00/…/.. 23 SSW VEC1 22 SSW RMY 23
8/3 79/59/69/-4/…/…/.. 32 SSW VEC1 34 SSW RMY 34
8/4 The low since midnight is 62F, the daily normal low is 64F
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 4
HIGH 96F IN 2022
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 67 MPH SSE IN 2020 [POST-TROPICAL STORM ISAIAS]
RECORDS FOR AUGUST 5
HIGH 98F IN 1955
LOW 48F IN 1929,1972
PRECIP 2.97 INCHES IN 1893
PEAK GUST 60e MPH SW 1977
TODAY’S REPORT PREPARED BY: Amanda Joly
