Wednesday, May 10, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, MAY 10, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0428E
SUNSET: 1853E
SUNNY SKIES WITH CONTINUED SMOKE ALOFT ON BLUE HILL…
Clear, sunny skies have dominated the sky today, however, the
wildfires in Alberta, Canada continue to bring in a thin layer of
smoke aloft.
Temperatures are starting to recover from the last couple of colder
days. This morning brought a steep rise in temperature along with
very dry air.
The wind started off light this morning at 6 knots from the WNW and
has increased slightly throughout the day, with a gust reported this
afternoon from the West at around 24mph.
Visibility has been decent all day with views of around 60 miles.
The maximum temperature so far today is 69F, this is 4 degrees
above the normal high of 65F. The low since midnight is 42F,
which is 5 degrees below the normal low of 47F.
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Today’s Observations:
7 A.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 51F; Dew Point: 36F; Relative Humidity: 55%
Wind: WNW @ 6 kts, wind light
Sea-level pressure: 1021.2 mb; 30.16 in. Hg: rising, then more
slowly
Visibility: 60 miles
6-hr Max temp: 51F
6-hr Min temp: 42F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 60 212/51/36/2906/016/ THN K LYR ALF ALQDS WND LGT/
8/000 51012 10051 20042
10 A.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 65F; Dew Point: 28F; Relative Humidity: 25%
Wind: NW @ 7 kts
Sea-level pressure: 1020.6 mb; 30.14in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 60 206/65/28/3107/014/ THN K LYR ALF ALQDS/
8/000 58006
1 P.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 69F; Dew Point: 26F; Relative Humidity: 20%
Wind: WNW @ 8 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: falling, then more
rapidly
Visibility: 60 miles
6-hr Max temp: 69F
6-hr Min temp: 51F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 60 179/69/26/2908/006/ THN K LYR ALF ALQDS/
8/000 58027 10069 20051
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SUMMARY FOR TUESDAY, MAY 9, 2023
TEMPERATURE (DEGREES F)
MAX…….60 NORMAL…..65
MIN…….45 NORMAL…..46
MEAN……53 NORMAL…..56
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-3
TOTAL DEPARTURE FOR THE MONTH…………………-5 [-0.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………12 DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH……………89 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE SEASON…………5060 DEPARTURE……-925
TOTAL HEATING UNITS LAST SEASON TO DATE…….5492 DEPARTURE……-432
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……..-4
TOTAL COOLING UNITS FOR THE SEASON……………9 DEPARTURE……..+2
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)……….E24 NE @ 10:17 A.M.
VECTOR #1 (1-Sec)……….26 NE @ 10:17 A.M.
VECTOR #2 (1-Sec)……….22 NE @ 10:17 A.M.
DAVIS #1……………….23 ENE @ 10:17 A.M.
DAVIS #2 ………………24 S @ 07:54 P.M.
RMY #1 (Instantaneous)…..25 NE @ 10:17 A.M.
RMY #2 (Instantaneous)…..22 NE @ 10:17 A.M.
MERLIN…………………22 ENE
RICHARDS (C5C) (Inst)……22 @ 10:17 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 ENE @ 10:46 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 09:35 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 09:35 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 E @ 10:44 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S @ 07:58 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 E @ 10:44 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ENE @ 09:35 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 10:44 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.5 ESE [203 total miles]
VECTOR #1……………….8.6
VECTOR #2……………….9.1
DAVIS #1………………..8.8 ESE
DAVIS #2………………..9.0 ESE
RMY #1………………….8.7 E
RMY #2………………….9.0 E
RICHARDS (C5C)…………..9.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.45 DEPARTURE…..-0.65
TOTAL PRECIPITATION FOR THE YEAR…………..18.65 DEPARTURE…..-1.23
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
————————————————————–
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 74/49/62/+7/0.03/0.0/…/.. 32 NW VEC1 33 NW RMY 35
5/9 60/45/53/-3/0.00/0.0/…/.. 24 NE VEC1 25 NE RMY 25
5/10 The low since midnight is 42, the daily normal low is 47F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 10
HIGH 93F IN 1896
LOW 29F IN 1900
PRECIP 1.85 INS IN 1998
SNOW 2.8 INS 1977 (7.8 INS TOTAL 5/9-5/10 1977)
PEAK GUST 64 MPH S IN 1990
RECORDS FOR MAY 11
HIGH 90F IN 1993
LOW 28F IN 1900
PRECIP 1.28 INS IN 1957
SNOW 1.0 INS IN 1907 (LATEST MEASURABLE SNOW ON RECORD)
PEAK GUST 75e MPH NW IN 1945
TODAY’S REPORT PREPARED BY: Amanda Joly
