Saturday, July 8, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JULY 8, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0415E
SUNSET: 1923E
HAZY, HOT, AND HUMID CONDITIONS CONTINUE ON BLUE HILL….
The morning started off overcast with minimal breaks in the sky
and cleared up as the day progressed. Even with the clearing of
the clouds, the visibility still remained under 20 miles due to
the high dew points and hazy conditions.
Temperatures have been above average today, quickly reaching the
80’s by late morning. The dew points have remained in the low
70’s making for some very sticky conditions. The heat index has
hovered around the low 90’s for most of the day. It is a day to
stay hydrated and in the shade!
Winds have been light and variable for most of the day today. Our
average speed so far is about 5 mph with the peak gust of 20 mph
reported during the overnight hours. Winds have picked up in the
evenings over the last couple of days so hopefully that trend will
continue today.
Visibility improved from 10 miles this morning to only 15 miles
due to the hazy conditions.
The maximum temperature so far today is 84F, this is 3 degrees
above the normal high of 81F. The minimum since midnight is 70F,
which is 7 degrees above the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratocumulus, few higher clouds visible
Temperature: 74F; Dew Point: 71F; Relative Humidity: 93%
Wind: SW @ 4 kts, wind light and variable
Sea-level pressure: 1012.5 mb; 29.90 in. Hg: steady, then
rising
Visibility: 10 miles, thin fog
6-hr Max temp: 74F
6-hr Min temp: 70F
24-hr Precip: 0.00 inches
BHO SA 1155 E8 OVC 10 125/74/71/2304/990/ FEW BINOVC ALQDS HIER
CLDS VSBL THN F ALQDS WND L/V/ 8/4// 51005 10074 20070
10 A.M.
Weather: Broken cumulus all quadrants
Temperature: 79F; Dew Point: 70F; Relative Humidity: 80%
Wind: SSW @ 2 kts, wind light and variable
Sea-level pressure: 1012.3 mb; 29.89 in. Hg: falling, then steady
Visibility: 15 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E15 BKN 15 123/79/70/2002/989/ HAZY WND L/V/ 8/2//
56002
1 P.M.
Weather: Scattered cumulus all quadrants
Temperature: 81F; Dew Point: 75F; Relative Humidity: 75%
Wind: ENE @ 8 kts
Sea-level pressure: 1011.9mb; 29.88 in. Hg: falling, then more
rapidly
Visibility: 15 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 74F
6-hr Precip: 0.00 inches
BHO SA 1755 250 SCT 15 119/81/75/0608/988/ FEW CU ALQDS HAZY/
8/204 58004 10084 20074
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SUMMARY FOR FRIDAY, JULY 7, 2023
TEMPERATURE (DEGREES F)
MAX…….87 NORMAL…..81
MIN…….68 NORMAL…..63
MEAN……78 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+6
TOTAL DEPARTURE FOR THE MONTH…………………+13 [+1.7 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……..-2
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-2
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……………60 DEPARTURE…….+11
TOTAL COOLING UNITS FOR THE SEASON………….188 DEPARTURE………0
TOTAL COOLING UNITS LAST SEASON TO DATE……..212 DEPARTURE…….-24
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)……….E23 SW @ 04:46 P.M.
VECTOR #1 (1-Sec)……….23 SW @ 04:45 P.M.
VECTOR #2 (1-Sec)……….23 SSW @ 04:58 P.M.
DAVIS #1……………….22 S @ 03:35 P.M.
DAVIS #2 ………………23 S @ 03:45 P.M.
RMY #1 (Instantaneous)…..23 SW @ 04:45 P.M.
RMY #2 (Instantaneous)…..23 SSW @ 04:59 P.M.
MERLIN…………………22 SW
RICHARDS (C5C) (Inst)……21 @ 04:59 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 SSW @ 03:40 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 05:01 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 05:00 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 S @ 05:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 SSW @ 05:01 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SSW @ 05:01 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 SSW @ 05:00 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 @ 05:01 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 9.3 SSW [224 total miles]
VECTOR #1………………… 8.8
VECTOR #2………………… 9.2
DAVIS #1…………………. 9.1 SSW
DAVIS #2………………….10.2 SSW
RMY #1…………………… 8.6 SSW
RMY #2…………………… 9.3 SW
RICHARDS (C5C)……………. 9.5
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..1.55 DEPARTURE…..+0.78
TOTAL PRECIPITATION FOR THE YEAR…………..26.73 DEPARTURE…..-1.27
————————————————————–
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/+11/0.00/…/.. 23 SW VEC1 22 SW RMY 23
7/8 The low since midnight is 70, the daily normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941
RECORDS FOR JULY 9
HIGH 98F IN 1912
LOW 47F IN 1909
PRECIP 3.74 INS IN 1921
WIND 46 MPH NW IN 1992
TODAY’S REPORT PREPARED BY: Amanda Joly
