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Friday, June 23, 2023

June 23, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, JUNE 23, 2023 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

FRIDAY, JUNE 23, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET:  1925E

REBOUND OF VISIBILITY THIS AFTERNOON AFTER A FOGGY MORNING…

Blue Hill Observatory started in the clouds today, with poor
visibility for most of the morning. With the appearance of the
sun, came a rise in visibility as well as dew point and temperature.
The absence of wind has not made for an ideal climate for anything
too strenuous such as biking or running, but a nice hike in the shade
would still be a safe bet.

Temperatures are slightly below average, however, with dew points
in the low to mid 60’s it has felt like anything but below average.
The pressure is starting to fall as of the last observation which
means the unstable air has arrived. This pattern will unfortunately
hold for a few days.

The wind has been unusually calm for most of the day. Our average
speed has only reached 4 mph with a gust of about 12 mph during the
overnight hours. The lack of wind has not helped give us any relief
with the climbing dew points either, making for a very sticky feel.

Visibility was under 10 miles for most of the morning and rebounded
quite nicely with 60 miles at the 13E observation. Once the fog
lifted, a layer of stratocumulus and cirrus could be seen.

The high temperature so far today is 73F, which is 5 degrees
below the normal maximum of 78F. The low since midnight is 58F,
which is 2 degrees below the normal minimum of 60F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 60F; Dew Point: 60F; Relative Humidity: 98%
Wind: Calm
Sea-level pressure: 1020.1 mb; 30.12 in. Hg: rising, then more rapidly
Visibility: 2 miles, fog
6-hr Max temp: 60F
6-hr Min temp: 58F
24-hr Precip:  0.03 inches
BHO SA 1155 X W2 2F 201/60/60/0000/012 WND CALM/ 8//// 53008 70003 10060
20058

10 A.M.
Weather: Overcast
Temperature: 65F; Dew Point: 62F; Relative Humidity: 91%
Wind: Calm
Sea-level pressure: 1020.2 mb; 30.13 in. Hg: steady, then falling
Visibility: 10 miles, thin fog all quadrants
3-hr Precip: 0.00 inches
BHO SA 1455 E2 OVC 10 202/65/62/0000/013 THN F ALQDS WND CALM/ 8////
50001 6002

1 P.M.
Weather: Broken stratocumulus, broken thin cirrus
Temperature: 73F; Dew Point: 65F; Relative Humidity: 76%
Wind: S @ 2 kts
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 73F
6-hr Min temp: 60F
6-hr Precip:  0.00 inches
BHO SA 1755 E20 BKN 250 -BKN 60 185/73/65/1802/008/ WND L/V/ 8/501 58017
10073 20060

————————————————————–

SUMMARY FOR THURSDAY, JUNE 22, 2023

TEMPERATURE (DEGREES F)
MAX…….70   NORMAL…..78
MIN…….58   NORMAL…..60
MEAN……62   NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-7
TOTAL DEPARTURE FOR THE MONTH………………..-66 [-3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….3  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………99  DEPARTURE…….+38
TOTAL HEATING UNITS FOR THE SEASON…………5295  DEPARTURE……-910
TOTAL HEATING UNITS LAST SEASON TO DATE…….5607  DEPARTURE……-312

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH……………37  DEPARTURE…….-29
TOTAL COOLING UNITS FOR THE SEASON…………..68  DEPARTURE…….-26
TOTAL COOLING UNITS LAST SEASON TO DATE……..107  DEPARTURE…….-39

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)……….E22 ENE   @  01:37 P.M.
VECTOR #1 (1-Sec)……….23 NE    @  01:05 P.M.
VECTOR #2 (1-Sec)……….25 NE    @  01:39 P.M.
DAVIS #1……………….22 ENE   @  01:05 P.M.
DAVIS #2 ………………19 ESE   @  10:13 A.M.
RMY #1 (Instantaneous)…..22 NE    @  01:05 P.M.
RMY #2 (Instantaneous)…..24 NE    @  01:39 P.M.
MERLIN…………………21 ENE
RICHARDS (C5C) (Inst)……23       @  01:35 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 NE  @  01:38 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15     @  01:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16     @  01:37 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 ENE @  01:37 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 E   @  02:43 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 ENE @  01:37 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ENE @  01:37 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15     @  01:37 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………. 8.3 ENE [198 total miles] VECTOR #1……………….. 7.6
VECTOR #2……………….. 8.0
DAVIS #1………………… 8.7 E
DAVIS #2………………… 8.6 E
RMY #1………………….. 7.5 NE
RMY #2………………….. 7.8 NE
RICHARDS (C5C)…………… 8.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.03 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..3.64 DEPARTURE…..+0.25
TOTAL PRECIPITATION FOR THE YEAR…………..24.39 DEPARTURE…..-1.60

————————————————————–

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/…/..             20 E    VEC1 20 NE  RMY 20
6/22  70/58/62/-7/0.03/…/..             22 ENE  VEC1 23 NE  RMY 22

6/23  The low since midnight is 58F, the daily normal low is 60F

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 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.76 INS IN 1893
PEAK GUST 63 MPH SE IN 1972 (AGNES)

RECORDS FOR JUNE 24
HIGH 91F IN 1914, 1976, 2013
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 54 MPH WNW IN 2010

TODAY’S REPORT PREPARED BY: Amanda Joly
Jun

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
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