Friday, September 6, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, SEPTEMBER 6, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0515E
SUNSET: 1809E
DENSE MORNING FOG LOOMS OVER BLUE HILL FOR MUCH OF THE
MORNING TODAY….
While the weather at the bottom of the hill may have started
out a bit different than the top of the hill, thanks to our slight
elevation we were in the clouds all morning. The fog impacted our
overall visibility and kept temperatures below normal for much of
the day today. The fog did eventually move on and since then we
have had some thick stratocumulus clouds as well as some much needed
sunshine. This morning the hill had a very damp and cool feel and
now it is beginning to dry out and feel more seasonal.
Temperatures stayed on the cooler side today, mostly due to the
overcast and foggy conditions. Once the fog lifted and the sun
was able to warm the hill, temperatures warmed nicely to almost
near normal temperatures. Dew points have increased a bit from
yesterday, holding steady in the lower 60’s throughout the day.
The wind has been out of the ENE for most of the day, with some
slower speeds earlier this morning and becoming a bit more breezy
as the day progressed. The average speed for the day so far is
around 9mph. The peak gust thus far is 21mph, which occurred just
after 12:30pm once the sunshine finally appeared on the hill!
We were in the clouds all day with dense fog on the hill until about
12pm. Visibility was impacted greatly by this, as we ranged between
1/4 to 1/2 mile for all of the morning. By the final observation at
1pm we had ‘improved’ to 30 miles.
The maximum temperature so far today is 73F, which is 3 degrees below
the normal high of 76F. The minimum temperature since midnight is 59F,
which is equal to the normal low of 59F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200 ft
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1022.8 mb; 30.20 in. Hg: falling, unsteadily
Visibility: 1/4 mile, fog
6-hr Max temp: 63F
6-hr Min temp: 59F
24-hr Precip: 0.00 inches
BHO SA 1155 X W2 1/4F 228/63/63/0605/020/ WND LGT/ 8//// 57007
10063 20059
10 A.M.
Weather: Sky obscured, vertical visibility 200 ft
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: ESE @ 7 kts
Sea-level pressure: 1022.1 mb; 30.18 in. Hg: falling unsteadily
Visibility: 1/2 mile, fog
3-hr Precip: 0.00 inches
BHO SA 1455 X W2 1/2F 221/63/63/0607/018/ 8//// 57007
1 P.M.
Weather: Broken stratocumulus, thinly broken cirrus
Temperature: 75F; Dew Point: 47F; Relative Humidity: 59%
Wind: ESE @ 8 kts
Sea-level pressure: 1020.6 mb; 30.14 in. Hg: falling, then more
slowly
Visibility: 30 miles
6-hr Max temp: 73F
6-hr Min temp: 63F
6-hr Precip: 0.00 inches
BHO SA 1755 E6 BKN 250 -BKN 30 206/72/63/0708/014/ 8/401 56015
10073 20063
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SUMMARY FOR THURSDAY, SEPTEMBER 5, 2024
TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..77
MIN…….58 NORMAL…..59
MEAN……68 NORMAL…..68
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………0
TOTAL DEPARTURE FOR THE MONTH……………………..-1 [0.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….3 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………..14 DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+11
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………17 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE SEASON………….711 DEPARTURE…….+93
TOTAL COOLING UNITS LAST SEASON TO DATE……..605 DEPARTURE……+106
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E20 ESE @ 04:28 P.M.
VECTOR #1 (1-Sec)……….19 ESE @ 04:49 P.M.
VECTOR #2 (1-Sec)……….20 ESE @ 06:08 P.M.
DAVIS #1……………….18 S @ 03:47 A.M.
DAVIS #2 ………………19 S @ 03:47 A.M.
RMY #1 (Instantaneous)…..19 ESE @ 06:07 P.M.
RMY #2 (Instantaneous)…..20 ESE @ 04:29 P.M.
MERLIN…………………18 SE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 ESE @ 10:53 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 04:27 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 06:54 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 ESE @ 04:29 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 ESE @ 06:54 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 ESE @ 04:29 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 ESE @ 06:54 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..9.0 ESE [216 total miles]
VECTOR #1………………9.1
VECTOR #2………………9.6
DAVIS #1……………….9.1 SE
DAVIS #2……………….9.4 SSE
RMY #1…………………9.0 SSE
RMY #2…………………9.6 SE
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.58
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.21 DEPARTURE…..+6.02
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/…/.. 20 ESE VEC1 19 ESE RMY 19
9/6 The low since midnight is 58F, the daily normal low is 59F.
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SEPTEMBER DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 6
HIGH 92F IN 1900, 2018
LOW 39F IN 1888
PRECIP 3.19 INCHES IN 1890
PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)
RECORDS FOR SEPTEMBER 7
HIGH 92F IN 2007, 2015, 2023
LOW 40F IN 1888
PRECIP 2.91 INCHES IN 1891
PEAK GUST 58e MPH W IN 1941
TODAY’S REPORT PREPARED BY: Amanda Joly
