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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JUNE 29, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0410E
SUNSET: 1925E
MORE CLOUDS THAN SUN, BUT LESS RAIN, STILL ON THE HUMID SIDE…
The day started off with a brief shower between 4-5am which
amounted to an additional 0.02″ in the gauge, after showers and
thunderstorms last evening brought 0.09″ to the Hill. After
the shower this morning, low clouds and fog shrouded the summit
until just about the 7am observation when it started lifting.
Since then, more clouds than sun has been the theme, but
temperatures have warmed easily into the upper 70s and low 80s
nonetheless. The dew point has been gradually slipping from the
upper 60s this morning to mid 60s this afternoon. However, it
still feels sticky out there, especially with a lack of wind.
The wind has been light all day with each observation today only
having wind speeds of 4kts! The average speed so far for the
day is around 6mph. The peak gust so far is only around 16mph.
Visibility has been limited all day, generally running 10-25
miles.
The maximum temperature so far today is 81F, this is 1 degree
above the normal high of 80F. The minimum since midnight is 65F,
which is 3 degrees above the normal low of 62F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered stratus fractus, broken stratocumulus,
broken altocumulus, few lower stratus fractus SW-NW
Temperature: 68F; Dew Point: 67F; Relative Humidity: 95%
Wind: S @ 4 kts, wind light
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising, then more slowly
Visibility: 10 miles, 6 miles SW-NW, thin fog
6-hr Max temp: 68F
6-hr Min temp: 65F
24-hr Precip: 0.11 inches
BHO SA 1155 5 SCT 20 BKN 90 BKN 10 159/68/67/1904/000/
FEW LWR STFRA SW-NW THN F ALQDS VSBY 6 SW-NW WND LGT/
8/750 51015 6002/ 70011 10068 20065
10 A.M.
Weather: Broken cumulus, broken stratocumulus, towering cumulus
E-SE, virga distant SE
Temperature: 74F; Dew Point: 66F; Relative Humidity: 75%
Wind: SSW @ 4 kts, wind light
Sea-level pressure: 1016.7 mb; 30.02 in. Hg: rising, then falling
Visibility: 25 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 30 BKN 25 167/74/66/2004/002/ TCU E-SE
VIRGA DSNT SE HAZY WND LGT/ 8/800 50008
1 P.M.
Weather: Broken cumulus
Temperature: 80F; Dew Point: 65F; Relative Humidity: 60%
Wind: SSW @ 4 kts, wind light and variable
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling, then more slowly
Visibility: 20 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 68F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 20 161/80/65/2004/001/ HAZY WND L/V/
8/200 56006 10081 20068
————————————————————–
SUMMARY FOR WEDNESDAY, JUNE 28, 2023
TEMPERATURE (DEGREES F)
MAX…….78 NORMAL…..79
MIN…….66 NORMAL…..62
MEAN……72 NORMAL…..70
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+2
TOTAL DEPARTURE FOR THE MONTH………………..-50 [-2.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………99 DEPARTURE…….+34
TOTAL HEATING UNITS FOR THE SEASON…………5295 DEPARTURE……-914
TOTAL HEATING UNITS LAST SEASON TO DATE…….5610 DEPARTURE……-315
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….7 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH……………81 DEPARTURE…….-18
TOTAL COOLING UNITS FOR THE SEASON………….112 DEPARTURE…….-14
TOTAL COOLING UNITS LAST SEASON TO DATE……..141 DEPARTURE…….-29
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)……….E29 SSW @ 12:52 P.M.
VECTOR #1 (1-Sec)……….29 SSW @ 12:52 P.M.
VECTOR #2 (1-Sec)……….28 SSW @ 12:52 P.M.
DAVIS #1……………….26 S @ 10:34 A.M.
DAVIS #2 ………………32 S @ 10:34 A.M.
RMY #1 (Instantaneous)…..28 SSW @ 12:52 P.M.
RMY #2 (Instantaneous)…..29 SSW @ 12:52 P.M.
MERLIN…………………25 S
RICHARDS (C5C) (Inst)……27 @ 12:52 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW @ 12:54 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 12:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 12:53 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S @ 12:53 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 SSW @ 12:53 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SSW @ 12:53 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW @ 12:53 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 @ 12:53 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..10.6 SSW [254 total miles]
VECTOR #1…………………10.9
VECTOR #2…………………11.7
DAVIS #1………………….10.2 S
DAVIS #2………………….11.5 S
RMY #1……………………10.6 S
RMY #2……………………11.8 S
RICHARDS (C5C)…………….10.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.11 DEPARTURE…..-0.02
TOTAL PRECIPITATION FOR THE MONTH…………..4.43 DEPARTURE…..+0.06
TOTAL PRECIPITATION FOR THE YEAR…………..25.18 DEPARTURE…..-1.79
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
6/1 88/56/72/+10/0.00/859/95 21 WSW VEC1 21 WSW RMY 21
6/2 91/53/72/+10/0.53/634/70 37 ENE VEC1 39 ENE RMY 37 TSTM
6/3 53/43/48/-14/0.16/000/00 36 NE VEC1 38 NE RMY 36
6/4 52/43/48/-15/0.17/009/01 30 N VEC1 32 N RMY 29
6/5 58/47/53/-10/0.08/027/03 22 N VEC1 24 N RMY 23
6/6 72/50/61/-2/T/582/64 31 NNW VEC1 31 NNW RMY 26 TSTM
6/7 65/50/58/-6/0.00/301/33 28 NW VEC1 29 NW RMY 29
6/8 64/51/58/-6/T/191/21 13 WNW VEC1 13 WNW RMY 10
6/9 64/49/57/-7/0.47/210/23 20 WNW VEC1 21 ESE RMY 20 TSTM
6/10 67/51/59/-6/0.05/365/40 26 WNW VEC1 26 WNW RMY 26 TSTM
6/11 80/55/68/+3/0.00/823/90 23 S VEC1 24 S RMY 24
6/12 79/60/70/+5/0.15/439/48 32 SSE VEC1 33 SSE RMY 31
6/13 78/59/69/+3/0.03/421/46 26 SE VEC1 27 SE RMY 24
6/14 78/57/68/+2/0.06/448/49 38 S VEC1 39 S RMY 39 TSTM
6/15 77/56/67/+1/0.00/559/61 23 WNW VEC1 22 WNW RMY 22
6/16 81/61/71/+4/T/513/56 20 W VEC1 19 SSW RMY 19
6/17 64/55/60/-7/1.86/000/00 21 NE VEC1 21 NE RMY 21
6/18 70/56/63/-4/0.05/321/35 20 WNW VEC1 20 WNW RMY 20
6/19 67/54/61/-7/0.00/284/31 20 SE VEC1 20 SE RMY 18
6/20 71/53/62/-6/T/367/40 20 ESE VEC1 20 ESE RMY 20
6/21 69/53/61/-7/0.00/826/90 20 E VEC1 20 NE RMY 20
6/22 70/58/62/-7/0.01/789/86 22 ENE VEC1 23 NE RMY 22
6/23 80/58/69/+0/0.04/303/33 18 SSW VEC1 19 SSW RMY 19
6/24 77/66/72/+3/0.12/220/24 29 SW VEC1 29 SW RMY 31
6/25 85/67/76/+6/0.00/660/72 21 SSW VEC1 21 S RMY 21 TSTM
6/26 82/66/74/+4/T/385/42 23 S VEC1 27 S RMY 25
6/27 77/65/71/+1/0.38/275/30 38 SSW VEC1 39 SSW RMY 39 TSTM
6/28 78/66/72/+2/0.25/…/.. 29 SSW VEC1 29 SSW RMY 28 TSTM
6/29 The low since midnight is 65F, the daily normal low is 62F
DAILY RECORDS
06/02/2023: TIED RECORD HIGH MAXIMUM TEMPERATURE OF 91F,
ALSO SET IN 1895
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 29
HIGH 95F IN 2021
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957
RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957
TODAY’S REPORT PREPARED BY: Matt Douglas
