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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, MAY 17, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0421E
SUNSET: 1901E
BREEZY AND COOLER TODAY WITH MUCH LESS HUMIDITY….
A brief thunderstorm moved through last evening along the
leading edge of cooler/drier air. Only 0.07″ of rain
resulted however, so the dry beat continues. For the month
we’re running a deficit of -1.21″ and for the year that
deficit is up to -3.71″.
Today started with clear skies and a boat load of sunshine,
however instability of the day leading to the development of
cumulus clouds which have grown into rain showers. A shower
was ongoing here on the hill at the 1 P.M. observation,
however only a trace of rain was realized.
Temperatures today briefly shot up to the mid 70s, but as
the clouds increased, they fell back a bit to around 70,
then dipped further to the mid 60s during the rain shower.
Dew point readings have been in the 40s today, making it feel
so much better than yesterday when the dew point was in the
low to mid 60s.
As mentioned, it’s been breezy today with gusty winds out of
the west the theme most of the day. The average speed for
the day is around 16mph. A peak gust of 43mph is the max so
far occuring before noon.
Visibility has been holding between 40-50 miles most of the
day.
The high so far today is 74F, which is 7 degrees above the
normal maximum of 67F. The low since midnight is 53F, which
is 4 degrees above the normal minimum of 49F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant WNW-NW
Temperature: 58F; Dew Point: 45F; Relative Humidity: 61%
Wind: W @ 12G20 kts
Sea-level pressure: 1004.7 mb; 29.67 in. Hg: rising, then more slowly
Visibility: 45 miles
6-hr Max temp: 58F
6-hr Min temp: 53F
24-hr Precip: 0.07 ins.
BHO SA 1155 CLR 45 047/58/45/2812G20/967/ FEW SC DSNT WNW-NW/
8/500 51023 70007 10058 20053
10 A.M.
Weather: Clear, few cumulus all quadrants
Temperature: 66F; Dew Point: 44F; Relative Humidity: 45%
Wind: W @ 17G29 kts, peak wind W 35mph at 9:40 A.M.
Sea-level pressure: 1004.0 mb; 29.65 in Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 40 040/66/44/2717G29/965/ FEW CU ALQDS HAZY
PK WND 2630/40/ 8/200 58007
1 P.M.
Weather: Broken cumulus, overcast stratocumulus, few breaks in overcast
all quadrants, light rain shower
Temperature: 63F, Dew point: 49F; Relative Humidity: 60%
Wind: NW @ 17G28 kts, peak wind W 39mph at 12:01 P.M.
Sea-level pressure: 1003.3 mb; 29.63 in Hg, falling, then rising
Visibility: 40 miles
6-hr Max temp: 74F
6-hr Min temp: 58F
6-hr Precip: Trace
BHO SA 1755 E60 BKN 75 OVC 40RW- 033/63/49/3117G28/963/
FEW BINOVC ALQDS RW-B30 PK WND 2634/01/ 8/4// 55007 6000/
10074 20058
————————————————————–
SUMMARY FOR MONDAY, MAY 16, 2022
TEMPERATURE (DEGREES F)
MAX…….83 NORMAL…..67
MIN…….58 NORMAL…..48
MEAN……71 NORMAL…..58
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……+13
TOTAL DEPARTURE FOR THE MONTH………………+11 [+0.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………..0 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH…………164 DEPARTURE……. +4
TOTAL HEATING UNITS FOR THE SEASON……….5528 DEPARTURE……-519
TOTAL HEATING UNITS LAST SEASON TO DATE…..5500 DEPARTURE…….+28
COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..6 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH………….24 DEPARTURE…….+16
TOTAL COOLING UNITS FOR THE SEASON…………24 DEPARTURE…….+13
TOTAL COOLING UNITS LAST SEASON TO DATE……..1 DEPARTURE…….+23
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….40 SSW @ 2:18 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..44 @ 2:18 P.M.
DAVIS #2 ………………43 S @ 2:18 P.M.
RMY #2 (Instantaneous)…..45 SSW @ 2:18 P.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………………33 SSW @ 3:14 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29 @ 2:18 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S @ 2:19 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 SSW @ 2:18 P.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……..12.7 SSW [305 total miles]
VECTOR #2………………13.1
DAVIS #2……………….13.0 SSW
RMY #2…………………13.3 SSW
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…….0.07 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH………….0.70 DEPARTURE…..-1.21
TOTAL PRECIPITATION FOR THE YEAR………….16.98 DEPARTURE…..-3.71
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/-6/0.00/866/100 44 ENE AERO N/A RMY 46
5/11 58/43/51/-5/0.00/182/21 36 NE AERO N/A RMY 38
5/12 68/48/58/+1/T/487/56 17 ENE AERO N/A RMY 18
5/13 82/56/69/+12/0.00/619/71 33 SSW AERO N/A RMY 34
5/14 85/63/74/+17/0.02/621/71 33 SW AERO N/A RMY 34
5/15 78/62/70/+13/0.03/394/45 23 SW AERO N/A RMY 24
5/16 83/58/71/+13/0.07/623/71 40 SSW AERO N/A RMY 45
5/17 The low since midnight is 53F, the daily normal low is 49F
DAILY RECORDS
05/14/2022: NEW HIGH MINIMUM TEMPERATURE RECORD OF 63F,
PREVIOUS RECORD WAS 60F SET IN 1944.
05/14/2022: TIED RECORD HIGH OF 85F, PREVIOUSLY SET IN 1961
05/15/2022: NEW RECORD HIGH MINIMUM WAS SET OF 62F,
PREVIOUS RECORD WAS 58F set in 1896, 1961, and 2004.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 17
HIGH 90F IN 2017
LOW 34F IN 1956, 1957
PRECIP 2.07 INS IN 1916
PEAK GUST 52 MPH SW IN 1967, W IN 1974
RECORDS FOR MAY 18
HIGH 96F IN 2017(RECORD FOR MAY)
LOW 35F IN 2002
PRECIP 1.93 INS IN 2007
SNOW TRACE IN 2002 (Ice pellets)
PEAK GUST 64 MPH SSW IN 2000
TODAY’S REPORT PREPARED BY: Matt Douglas
