Monday, May 8, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, MAY 8, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0431E
SUNSET: 1851E
MAINLY SUNNY, WARM, AND DRY ONCE AGAIN WITH A NICE BREEZE…
Today has featured plenty of sunshine despite the advancement
of some high thin cirrus clouds as we moved into the afternoon
hours. Some fair weather cumulus have also been popping up
since late this morning into the afternoon.
Temperatures once again responded nicely with readings reaching
the upper 60s by the late morning hours, and then the low to
mid 70s early this afternoon.
Winds have been a bit busier than yesterday, but still nothing
that deters from the beauty of the day. The average speed for
the day has been around 10mph thus far. The highest gust so far
has been around 30mph, occurring just after the 1pm observation!
Visibility has been decent all day with views of 60-70 miles.
The maximum temperature so far today is 74F, this is 9 degrees
above the normal high of 65F. The low since midnight is 54F,
which is 8 degrees above the normal low of 46F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus distant NW-E
Temperature: 60F; Dew Point: 51F; Relative Humidity: 71%
Wind: NW @ 8 kts
Sea-level pressure: 1006.6 mb; 29.73 in. Hg: steady, then rising
Visibility: 60 miles
6-hr Max temp: 60F
6-hr Min temp: 54F
24-hr Precip: 0.04 ins.
BHO SA 1155 CLR 60 066/60/51/3208/973/ FEW AC DSNT NW-E/
8/050 53009 6002/ 70004 10060 20054
10 A.M.
Weather: Clear, few cumulus all quadrants, few cirrus distant NE-SSE
Temperature: 69F; Dew Point: 42F; Relative Humidity: 37%
Wind: NW @ 14G23 kts
Sea-level pressure: 1005.8 mb; 29.70 in. Hg: falling, then more rapidly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 70 058/69/42/3214G23/970/ FEW CU ALQDS
FEW CI DSNT NE-SSE/ 8/201 58008
1 P.M.
Weather: Thin broken cirrus, few cumulus all quadrants
Temperature: 73F; Dew Point: 36F; Relative Humidity: 26%
Wind: NW @ 15G24 kts
Sea-level pressure: 1005.5 mb; 29.69 in. Hg: falling, then steady
Visibility: 60 miles
6-hr Max temp: 74F
6-hr Min temp: 60F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 -BKN 60 055/73/36/3115G24/969/ FEW CU ALQDS/
8/201 56003 10074 20060
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SUMMARY FOR SUNDAY, MAY 7, 2023
TEMPERATURE (DEGREES F)
MAX…….78 NORMAL…..65
MIN…….52 NORMAL…..46
MEAN……65 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+10
TOTAL DEPARTURE FOR THE MONTH…………………-9 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE MONTH……………74 DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE SEASON…………5045 DEPARTURE……-920
TOTAL HEATING UNITS LAST SEASON TO DATE…….5455 DEPARTURE……-410
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON……………9 DEPARTURE……..+3
TOTAL COOLING UNITS LAST SEASON TO DATE……….0 DEPARTURE……..+9
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)……….E26 WNW @ 12:53 P.M.
VECTOR #1 (1-Sec)……….27 NW @ 12:31 P.M.
VECTOR #2 (1-Sec)……….30 NW @ 12:31 P.M.
DAVIS #1……………….27 WNW @ 12:31 P.M.
DAVIS #2 ………………26 WNW @ 12:52 P.M.
RMY #1 (Instantaneous)…..28 WSW @ 3:24 P.M.
RMY #2 (Instantaneous)…..28 WNW @ 12:30 P.M.
MERLIN…………………25 WNW
RICHARDS (C5C) (Inst)……27 @ 12:31 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 W @ 3:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 3:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 12:53 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 WSW @ 3:26 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 WNW @ 12:53 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 W @ 3:26 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 WNW @ 12:53 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 3:26 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………10.5 WNW [252 total miles]
VECTOR #1……………….10.5
VECTOR #2……………….11.2
DAVIS #1………………..10.8 W
DAVIS #2………………..11.0 WNW
RMY #1………………….10.1 WNW
RMY #2………………….10.9 WNW
RICHARDS (C5C)…………..10.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.04 DEPARTURE…..-0.08
TOTAL PRECIPITATION FOR THE MONTH…………..0.45 DEPARTURE…..-0.42
TOTAL PRECIPITATION FOR THE YEAR…………..18.65 DEPARTURE…..-1.00
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-34.8
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PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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
5/1 63/45/54/+1/0.04/0.0/540/64 44 SSE VEC1 46 SSE RMY 48
5/2 57/43/50/-4/0.22/0.0/144/17 33 S VEC1 34 S RMY 35
5/3 55/42/49/-5/0.01/0.0/093/11 25 E VEC1 25 E RMY 25
5/4 45/40/43/-11/0.07/0.0/009/01 29 NE VEC1 29 NE RMY 29
5/5 59/43/51/-4/0.07/0.0/367/43 18 NE VEC1 19 NE RMY 19
5/6 74/43/59/+4/0.00/0.0/847/99 25 NW VEC1 26 NW RMY 26
5/7 78/52/65/+10/0.01/0.0/…/.. 26 WNW VEC1 27 W RMY 28
5/8 The low since midnight is 54, the daily normal low is 46F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 8
HIGH 89F IN 2000
LOW 29F IN 1956
PRECIP 1.48 INCHES IN 1886
SNOWFALL TRACE IN 1898, 1947
PEAK GUST 68e MPH NNW IN 1943
RECORDS FOR MAY 9
HIGH 93F IN 2000
LOW 31F IN 1947
PRECIP 2.72 INCHES IN 1954
SNOWFALL 5.0 INS IN 1977 (RECORD FOR MAY)
PEAK GUST 70e MPH NE IN 1977
TODAY’S REPORT PREPARED BY: Matt Douglas
