Friday, July 28, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, JULY 28, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0433E
SUNSET: 1908E
HAZY, VERY WARM, AND HUMID UNDER MAINLY SUNNY SKIES TODAY…
A severe thunderstorm rolled across the hill early yesterday
evening bringing with it strong wind gusts. An official gust
of 61mph (53kts) WNW was recorded at 5:14pm. Frequent lightning
and a brief period of heavy rain also accompanied the storm.
Total rainfall from the storm was only 0.43″, but this did
bring the monthly total to over 8.50″, which is over 5.50″ above
normal to date.
The peak gust set a new record peak wind gust for the date,
beating the old record of 47 mph ENE set back in 1984.
Today has been much quieter with abundant sunshine and only some
scattered cumulus clouds this afternoon. The temperature has
reached the upper 80s. So far, we have not recorded a 90F this
week, despite forecasts calling for low to mid 90s. As such,
there has not been, nor will there be a heatwave here at Blue
Hill this week.
The dew point continues to hover around the 70F degree mark,
making for a rather uncomfortable feel out there today. It is
also pushing the heat index into the low 90s, so while it hasn’t
reached 90F the last couple of days, it certainly has felt like
it.
The wind has been on the lighter side today with an average speed
of only around 8mph. The peak gust so far today has only been
around 20mph, occurring just after 7am this morning.
Visibility has been limited today due to haziness from the high
humidity levels. We’ve only been able to see 20-30 miles all
day.
The maximum temperature so far today is 87F, this is 5 degrees
above the normal high of 82F. The minimum temperature today is
68F, which is 4 degrees above the normal low of 64F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus S-W
Temperature: 73F; Dew Point: 71F; Relative Humidity: 93%
Wind: NW @ 8 kts
Sea-level pressure: 1016.0 mb; 30.00 in. Hg: rising, then more slowly
Visibility: 20 miles, thin fog
6-hr Max temp: 73F
6-hr Min temp: 68F
24-hr Precip: 0.43 inches
BHO SA 1155 CLR 20 160/73/71/3208/000/ FEW AC S-W THN F ALQDS/
8/050 51015 70043 10073 20068
10 A.M.
Weather: Clear, few small cumulus all quadrants, few altocumulus
distant SE-S
Temperature: 81F; Dew Point: 69F; Relative Humidity: 67%
Wind: Calm
Sea-level pressure: 1016.0 mb; 30.00 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 30 160/81/69/0000/000/ FEW SML CU ALQDS FEW AC DSNT SE-S
HAZY WND CALM/ 8/150 50000
1 P.M.
Weather: Scattered cumulus, few cirrus WNW-NNE
Temperature: 86F; Dew Point: 70F; Relative Humidity: 59%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1015.1mb; 29.98 in. Hg: rising, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 73F
6-hr Precip: 0.00 inches
BHO SA 1755 30 SCT 30 151/86/70/2706/998/ FEW CI WNW-NNE HAZY WND LGT/
8/201 58009 10087 20073
————————————————————–
SUMMARY FOR THURSDAY, JULY 27, 2023
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..82
MIN…….68 NORMAL…..64
MEAN……78 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+59 [+2.0 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……..-6
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-6
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………13 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………..265 DEPARTURE…….+50
TOTAL COOLING UNITS FOR THE SEASON………….393 DEPARTURE…….+39
TOTAL COOLING UNITS LAST SEASON TO DATE……..454 DEPARTURE…….-61
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)……….E61 WNW @ 05:14 P.M.
VECTOR #1 (1-Sec)……….63 WNW @ 05:15 P.M.
VECTOR #2 (1-Sec)……….63 WNW @ 05:15 P.M.
DAVIS #1……………….61 WNW @ 05:14 P.M.
DAVIS #2 ………………58 W @ 05:15 P.M.
RMY #1 (Instantaneous)…..66 WNW @ 05:15 P.M.
RMY #2 (Instantaneous)…..65 WNW @ 05:15 P.M.
MERLIN…………………55 W
RICHARDS (C5C) (Inst)……61 @ 05:15 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………46 WNW @ 05:15 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..40 @ 05:15 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..42 @ 05:10 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………40 W @ 05:16 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………42 WNW @ 05:15 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..38 WNW @ 05:15 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..41 WNW @ 05:15 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………40 @ 05:15 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..15.5 SW [373 total miles]
VECTOR #1…………………15.3
VECTOR #2…………………16.1
DAVIS #1………………….15.1 SW
DAVIS #2………………….16.1 SW
RMY #1……………………15.1 SW
RMY #2……………………16.2 SW
RICHARDS (C5C)…………….14.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.43 DEPARTURE…..+0.31
TOTAL PRECIPITATION FOR THE MONTH…………..8.54 DEPARTURE…..+5.54
TOTAL PRECIPITATION FOR THE YEAR…………..33.72 DEPARTURE…..+3.49
————————————————————–
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 The low since midnight is 68F, the daily normal low is 64F
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
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006
RECORDS FOR JULY 29
HIGH 97F IN 1949
LOW 53F IN 1888,1914
PRECIP 1.53 INS IN 1901
PEAK GUST 40e MPH E IN 1941
TODAY’S REPORT PREPARED BY: Matt Douglas
