Wednesday, May 11, 2022
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, MAY 11, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0427E
SUNSET: 1855E
MOSTLY CLOUDY WITH DECENT VISIBILITY AND A COOL
EASTERLY WIND….
It may actually be a little less windy than days prior,
with easterly winds around 10 mph on average. Visibility
was 60 miles on average with some obstruction due to
pollen in the air. Conditions were still somewhat dry
today with dew points climbing into the mid 40’s by
the 1 P.M. observation. A change in air mass definitely
feels like it is on the way.
The high so far today is 58F, which is 8 degrees below the
normal maximum of 66F. The low since midnight is 43F, which
is 5 degrees below the normal minimum of 47F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus
Temperature: 48F; Dew Point: 39F; Relative Humidity: 70%
Wind: ENE @ 17G24 kts, peak wind ENE 34 mph at 6:01 A.M.
Sea-level pressure: 1028.3 mb; 30.37 in. Hg: rising, then
more slowly
Visibility: 60 miles
6-hr Max temp: 48F
6-hr Min temp: 44F
24-hr Precip: 0.00 ins.
BHO SA 1155 30 BKN 60 283/48/39/0717G24/037/ PK WND 0730/01/ 8/800
51012 10048 20044
10 A.M.
Weather: Broken stratocumulus and cirrostratus
Temperature: 52F; Dew Point: 40F; Relative Humidity: 63%
Wind: ENE @ 13G18 kts
Sea-level pressure: 1029.2 mb; 30.40 in Hg: rising steadily
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 30 BKN 250 BKN 60 292/52/40/0713G18/040/ 8/806 52009
1 P.M.
Weather: Broken stratocumulus and cirrostratus
Temperature: 56F, Dew point: 44F; Relative Humidity: 64%
Wind: ENE @ 11G18 kts
Sea-level pressure: 1028.5 mb; 30.38 in Hg, falling steadily
Visibility: 60 miles
6-hr Max temp: 58F
6-hr Min temp: 48F
6-hr Precip: 0.00 ins.
BHO SA 1755 30 BKN 250 BKN 60 285/56/44/0711G18/038/ 8/806
57007 10058 20048
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SUMMARY FOR TUESDAY, MAY 10, 2022
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..65
MIN…….43 NORMAL…..47
MEAN……50 NORMAL…..56
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…… -6
TOTAL DEPARTURE FOR THE MONTH………………-40 [-4.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY………….15 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………143 DEPARTURE…….+35
TOTAL HEATING UNITS FOR THE SEASON……….5507 DEPARTURE……-488
TOTAL HEATING UNITS LAST SEASON TO DATE…..5467 DEPARTURE…….+40
COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………..0 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE SEASON………….0 DEPARTURE……..-7
TOTAL COOLING UNITS LAST SEASON TO DATE……..0 DEPARTURE………0
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….43 ENE @ 9:44 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..46 @ 9:44 A.M.
DAVIS #2 ………………41 ENE @ 9:44 A.M.
RMY #2 (Instantaneous)…..46 ENE @ 9:44 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 ENE @ 11:29 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 @ 11:29 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 ENE @ 11:29 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 ENE @ 11:29 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..15.8 ENE [378 total miles]
VECTOR #2………………15.8
DAVIS #2……………….16.0 ENE
RMY #2…………………15.4 NE
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
ASOS…………OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
DAVIS #1……..OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH………….0.58 DEPARTURE…..-0.64
TOTAL PRECIPITATION FOR THE YEAR………….16.86 DEPARTURE…..-3.14
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
5/01 69/40/55/+2/0.00/786/93 25 SSE AERO 25 SSE RMY 27
5/02 58/42/50/-4/0.21/059/07 21 NE AERO 19 NE RMY 20
5/03 57/43/50/-4/0.23/229/27 23 ENE AERO 22 ENE RMY 24
5/04 52/45/49/-5/0.14/000/00 19 NW AERO 18 SE RMY 19
5/05 70/46/58/+3/0.00/666/78 23 NNW AERO 21 NNW RMY 23
5/06 63/49/56/+1/0.00/051/06 20 S AERO 18 S RMY 21
5/07 49/42/46/-9/0.00/112/13 48 ENE AERO 51 ENE RMY 50
5/08 51/40/46/-9/0.00/621/72 43 ENE AERO N/A RMY 47
5/09 54/39/47/-9/0.00/838/97 43 ENE AERO N/A RMY 46
5/10 57/43/50/-6/0.00/…/.. 44 ENE AERO N/A RMY 46
5/11 The low since midnight is 43F, 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 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
RECORDS FOR MAY 12
HIGH 88F IN 2001
LOW 29F IN 1907
PRECIP 1.49 INCHES IN 1968
SNOW TRACE IN 2019
PEAK GUST 76 MPH S IN 1974
TODAY’S REPORT PREPARED BY: Benjamin Turner
