Tuesday, May 31, 2022
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, MAY 31, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0410E
SUNSET: 1914E
HEAT AND HUMIDITY TAKING A BREAK AFTER SHARP FRONTAL PASSAGE….
With a warm overnight last night (overnight low was 70F) and
a rapid rise in temperatures early this morning, one would
have thought today was going to be a cooker, and ordinarily,
you’d be correct. However a strong backdoor cold front swept
through the area this morning between 8-9am EST bringing the
heat and humidity to a very abrupt end. At 8am we were
already at 80F and did manage to get to 81F just before the
front moved in. Frontal passage occurred here on the hill
at 8:07am with a 20 degree temperature drop by 9am when 61F
was measured.
The front was also accompanied by gusty winds out of the
ENE which reached values over 30mph. The dew point also
tumbled with a reading of 66F at 8am, but down to 47F at
the 1pm observation.
A cloud of pollen was kicked up by the front which temporarily
reduced visibility to under 10 miles. Otherwise visibility
hasn’t been great today anyway with generally 20-30 miles
being seen.
The dry stretch of weather continues with an overall lack of
any appreciable rainfall here at Blue Hill, and quite frankly
across southeastern Massachusetts. Our total for the month is
only 1.06″. This is 2.62″ below normal to date. For the year
to date we’re running a deficit of 5.12″. According to the
latest drought monitor report, much of eastern Massachusetts
is under moderate drought conditions.
The high so far today is 81F, which is 10 degrees above the
normal maximum of 71F. The low since midnight is 59F, which
is 6 degrees above the normal minimum of 53F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken altocumulus castellanus, broken cirrostratus,
thin broken cirrus
Temperature: 76F; Dew Point: 65F; Relative Humidity: 69%
Wind: WNW @ 9 kts
Sea-level pressure: 1013.0 mb; 29.91 in. Hg: rising, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 76F
6-hr Min temp: 70F
24-hr Precip: 0.00 ins.
BHO SA 1155 E130 BKN 180 BKN 250 -BKN 35 130/76/65/3009/991/
HAZY/ 8/086 51005 10076 20070
10 A.M.
Weather: Thin scattered cirrus
Temperature: 61F; Dew Point: 51F; Relative Humidity: 69%
Wind: ENE @ 14G23 kts, peak wind ENE 36mph at 9:01 A.M.
Sea-level pressure: 1014.8 mb; 29.97 in Hg: falling, then rising
Visibility: 20 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 250 -SCT 20 148/61/51/0714G23/997/ HAZY PK WND 0631/01/
8/001 53018
1 P.M.
Weather: Thin broken cirrus, few stratocumulus distant NE-SE
Temperature: 61F, Dew point: 47F; Relative Humidity: 59%
Wind: E @ 16G24 kts, peak wind E 30mph at 12:08 P.M.
Sea-level pressure: 1015.6 mb; 29.99 in Hg: rising, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 59F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 -BKN 30 156/61/47/0816G24/999/ FEW SC DSNT NE-SE
HAZY PK WND 0926/08/ 8/501 51008 10081 20059
————————————————————–
SUMMARY FOR MONDAY, MAY 30, 2022
TEMPERATURE (DEGREES F)
MAX…….86 NORMAL…..70
MIN…….57 NORMAL…..52
MEAN……72 NORMAL…..61
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……+11
TOTAL DEPARTURE FOR THE MONTH………………+83 [+2.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………..0 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………202 DEPARTURE…….-50
TOTAL HEATING UNITS FOR THE SEASON……….5566 DEPARTURE……-573
TOTAL HEATING UNITS LAST SEASON TO DATE…..5565 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..7 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH………….58 DEPARTURE…….+35
TOTAL COOLING UNITS FOR THE SEASON…………58 DEPARTURE…….+32
TOTAL COOLING UNITS LAST SEASON TO DATE…….29 DEPARTURE…….+29
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….28 WSW @ 11:50 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..30 @ 11:50 P.M.
DAVIS #2 ………………27 WSW @ 1:41 P.M.
RMY #2 (Instantaneous)…..29 WSW @ 11:50 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………………22 WSW @ 10:50 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 11:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 SW @ 11:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SW @ 11:23 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…….11.0 WSW [264 total miles]
VECTOR #2……………..11.9
DAVIS #2………………12.1 W
RMY #2………………..11.8 W
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…..-0.13
TOTAL PRECIPITATION FOR THE MONTH………….1.06 DEPARTURE…..-2.62
TOTAL PRECIPITATION FOR THE YEAR………….17.34 DEPARTURE…..-5.12
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 TSTM
5/17 74/53/64/+6/T/722/82 44 W AERO N/A RMY 47
5/18 73/49/61/+3/0.00/803/91 39 NW AERO N/A RMY 41
5/19 60/52/56/-2/T/000/00 26 S AERO N/A RMY 28
5/20 75/49/62/+3/0.05/390/44 27 S AERO N/A RMY 28
5/21 86/57/72/+13/0.03/426/48 32 SSW AERO N/A RMY 33
5/22 93/68/81/+22/T/792/89 40 NNW AERO N/A RMY 41 TSTM
5/23 73/56/65/+6/0.00/437/49 33 N AERO N/A RMY 34
5/24 62/48/55/-5/0.00/…/.. 30 ENE AERO N/A RMY 30
5/25 73/47/60/0/0.00/…/.. 25 S AERO N/A RMY 26
5/26 70/48/59/-1/0.00/…/.. 34 SSW AERO N/A RMY 38
5/27 79/57/68/+8/T/…/.. 39 SW AERO N/A RMY 39
5/28 73/59/66/+5/0.28/…/.. 27 SW AERO N/A RMY 27
5/29 77/53/65/+4/0.00/…/.. 21 S AERO N/A RMY 22
5/30 86/57/72/+11/0.00/…/.. 28 WSW AERO N/A RMY 29
5/31 The low since midnight is 59F, the daily normal low is 53F
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.
05/22/2022: NEW HIGH MINIMUM TEMPERATURE RECORD OF 68F,
PREVIOUS RECORD WAS 67F SET IN 1992.
05/22/2022: TIED RECORD HIGH OF 93F, PREVIOUSLY SET IN 1911
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 31
HIGH 92F IN 1944,1987,2013
LOW 35F IN 1961
PRECIP 5.02 INS 1984 (RECORD FOR MAY)
PEAK GUST 54e MPH WNW IN 1945
RECORDS FOR JUNE 1
HIGH 90F IN 1937,2013
LOW 36F IN 1945 [Record for month]
PRECIP 2.28 INS IN 1992
PEAK GUST 51e MPH SE IN 1952
TODAY’S REPORT PREPARED BY: Matt Douglas
