Monday, July 10, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JULY 10, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0417E
SUNSET: 1922E
OVERCAST AND HUMID WITH PERIODS OF RAIN SHOWERS TODAY….
Clouds have dominated today with periods of rain showers which
started during the wee hours this morning. While the rain hasn’t
been steady all day, when it has rained it has been moderate to
heavy at times, especially late this morning and early this
afternoon. 0.02″ of water was in the gauge at 7am, with an
additional 0.58″ falling between 7am and 1pm. A moderate rain
shower was ongoing at the time of the 1pm observation, so some
additional rainfall will be measured.
With the cloud cover and onshore wind, the temperature has been
held in the upper 60s so far today. However with the dew point
also in the upper 60s, it’s been quite humid out there, as one
would expect with decent rainfall.
Winds have been a bit more vigorous than the past couple of days,
but that’s not really saying much. The average speed so far for
the day is around 9pmh. The peak gust so far is around 21mph. The
wind has been mainly out of the east-southeast today.
Visibility has of course been mostly limited today, although
there was a period during the late morning hours where it did
get as high as 30 miles, otherwise is been generally under 10
miles most of the day, and even under a 1/4 mile early this
morning.
The maximum temperature so far today is 70F, this is 12 degrees
below the normal high of 82F. The minimum since midnight is 67F,
which is 3 degrees above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light rain showers
Temperature: 68F; Dew Point: 68F; Relative Humidity: 100%
Wind: ESE @ 7 kts
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: falling, then rising
Visibility: 1/8 mile, fog
6-hr Max temp: 69F
6-hr Min temp: 67F
24-hr Precip: 0.02 inches
BHO SA 1155 X W2 1/8RW-F 106/68/68/1207/984/ RW-E18B31/ 8////
53006 6002/ 70002 10069 20067
10 A.M.
Weather: Overcast stratocumulus, few lower stratus fractus all
quadrants
Temperature: 69F; Dew Point: 69F; Relative Humidity: 99%
Wind: ESE @ 9 kts
Sea-level pressure: 1010.0 mb; 29.83 in. Hg: falling, then rising
Visibility: 30 miles, 10 miles SW-NW-NNE, thin fog
3-hr Precip: 0.12 inches
BHO SA 1455 E2 OVC 30 100/69/69/1209/983/ FEW LWR STFRA ALQDS
THN F ALQDS VIRGA SW-W-N VSBY 10 SW-NW-NNE/ 8/5// 55006 6012/
1 P.M.
Weather: Sky obscured, vertical visibility 300ft, rain showers,
few stratus fractus drifting over summit
Temperature: 69F; Dew Point: 69F; Relative Humidity: 100%
Wind: E @ 8 kts
Sea-level pressure: 1008.9mb; 29.79 in. Hg: falling, then more rapidly
Visibility: 1 mile, fog
6-hr Max temp: 70F
6-hr Min temp: 68F
6-hr Precip: 0.58 inches
BHO SA 1755 X W3 1RWF 089/69/69/0808/979/ FEW STFRA OCNLY DRFTG
OVR SMT/ 8//// 58011 6058/ 10070 20068
————————————————————–
SUMMARY FOR SUNDAY, JULY 9, 2023
TEMPERATURE (DEGREES F)
MAX…….81 NORMAL…..82
MIN…….69 NORMAL…..64
MEAN……75 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+2
TOTAL DEPARTURE FOR THE MONTH…………………+20 [+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……..-3
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-3
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………10 DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………82 DEPARTURE…….+17
TOTAL COOLING UNITS FOR THE SEASON………….210 DEPARTURE……..+6
TOTAL COOLING UNITS LAST SEASON TO DATE……..226 DEPARTURE…….-16
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)……….E17 ESE @ 02:47 P.M.
VECTOR #1 (1-Sec)……….18 E @ 02:41 P.M.
VECTOR #2 (1-Sec)……….18 ESE @ 02:46 P.M.
DAVIS #1……………….17 ESE @ 02:41 P.M.
DAVIS #2 ………………17 SE @ 10:58 P.M.
RMY #1 (Instantaneous)…..17 ESE @ 02:46 P.M.
RMY #2 (Instantaneous)…..18 ESE @ 02:45 P.M.
MERLIN…………………16 SE
RICHARDS (C5C) (Inst)……17 @ 02:46 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 ESE @ 02:46 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 02:47 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 11:01 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 ESE @ 02:47 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 SE @ 10:59 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 ESE @ 02:47 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 SE @ 11:01 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 @ 02:47 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..6.2 ESE [149 total miles]
VECTOR #1…………………6.6
VECTOR #2…………………6.8
DAVIS #1………………….6.4 ESE
DAVIS #2………………….6.6 SE
RMY #1……………………6.5 SE
RMY #2……………………6.8 SE
RICHARDS (C5C)…………….7.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..1.57 DEPARTURE…..+0.59
TOTAL PRECIPITATION FOR THE YEAR…………..26.75 DEPARTURE…..-1.46
————————————————————–
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/…/.. 17 S VEC1 16 SE RMY 15
7/6 92/69/81/+9/0.00/…/.. 23 SSW VEC1 22 SSW RMY 23
7/7 87/70/78/+6/0.00/…/.. 23 SW VEC1 22 SW RMY 23
7/8 84/70/77/+5/0.00/…/.. 20 W VEC1 20 W RMY 19
7/9 81/69/75/+2/T/…/.. 17 ESE VEC1 18 E RMY 17
7/10 The low since midnight is 67, 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 JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.95 INS IN 2015
WIND 75 MPH W IN 1985
RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988
TODAY’S REPORT PREPARED BY: Matt Douglas
