Sunday, June 25, 2023

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

SUNDAY, JUNE 25, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0409E
SUNSET:  1925E

VERY WARM AND HUMID TODAY ON BLUE HILL WITH A MIX OF CLOUDS AND SUN…

It certainly feels like summer today. The perfect beach day that
many have been longing for all month. Early morning stratus and
fog burned off pretty quickly this morning, yielding a mix of sun
and clouds. Once the sun started coming out, temperatures quickly
rose from the upper 60s to the low 80s by late this morning.

Meanwhile the dew point has been hovering around 70F making for
a very sticky day out there. This is the first day so far this
early summer season where we’ve had the dynamic duo of warmth
and high humidity together! I’m not a fan!

The wind has been on the light side, which is definitely not
helping with the sticky feel of the air as there is a lack of
ventilation. The average speed so far for the day is only around
8mph. The peak gust so far occurred way back at midnight of
around 20mph.

Visibility improved from 20 miles early this morning in thin fog
to around 50 miles late this morning and this afternoon, limited
by haziness from the high humidity levels.

The maximum temperature so far today is 84F, this is 5 degrees
above the normal high of 79F. The minimum since midnight is 67F,
which is 6 degrees above the normal low of 61F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus
Temperature: 71F; Dew Point: 68F; Relative Humidity: 91%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1011.2 mb; 29.86 in. Hg: rising, then more slowly
Visibility: 20 miles, thin fog
6-hr Max temp: 71F
6-hr Min temp: 67F
24-hr Precip:  0.09 inches
BHO SA 1155 E7 BKN 20 112/71/68/2306/986/ THN F ALQDS WND LGT/
8/500 51009 70009 10071 20067

10 A.M.
Weather: Broken cumulus
Temperature: 79F; Dew Point: 69F; Relative Humidity: 73%
Wind: SSW @ 4 kts, wind light
Sea-level pressure: 1011.2 mb; 29.86 in. Hg: rising, then falling
Visibility: 50 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E25 BKN 50 112/79/69/2104/986/ HAZY WND LGT/ 8/200 50000

1 P.M.
Weather: Broken cumulus, moderate cumulus all quadrants,
towering cumulus WNW-NNE, virga distant WNW and NNE
Temperature: 82F; Dew Point: 70F; Relative Humidity: 67%
Wind: S @ 7 kts
Sea-level pressure: 1010.8 mb; 29.85 in. Hg: rising, then falling
Visibility: 50 miles, hazy
6-hr Max temp: 83F
6-hr Min temp: 71F
6-hr Precip:  0.00 inches
BHO SA 1755 E40 BKN 50 108/82/70/1907/985/ MDT CU ALQDS TCU WNW-NNE
VIRGA DSNT WNW AND NNE HAZY/ 8/200 58004 10083 20071

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SUMMARY FOR SATURDAY, JUNE 24, 2023

TEMPERATURE (DEGREES F)
MAX…….77   NORMAL…..78
MIN…….66   NORMAL…..60
MEAN……72   NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+3
TOTAL DEPARTURE FOR THE MONTH………………..-63 [-2.8 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…….+37
TOTAL HEATING UNITS FOR THE SEASON…………5295  DEPARTURE……-912
TOTAL HEATING UNITS LAST SEASON TO DATE…….5607  DEPARTURE……-312

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….7  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………48  DEPARTURE…….-28
TOTAL COOLING UNITS FOR THE SEASON…………..79  DEPARTURE…….-25
TOTAL COOLING UNITS LAST SEASON TO DATE……..113  DEPARTURE…….-34

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 SW    @  04:19 P.M.
VECTOR #1 (1-Sec)……….29 SW    @  04:19 P.M.
VECTOR #2 (1-Sec)……….30 SW    @  08:10 P.M.
DAVIS #1……………….28 SSW   @  04:19 P.M.
DAVIS #2 ………………30 WSW   @  04:19 P.M.
RMY #1 (Instantaneous)…..31 SW    @  05:54 P.M.
RMY #2 (Instantaneous)…..31 SW    @  04:19 P.M.
MERLIN…………………29 SW
RICHARDS (C5C) (Inst)……31       @  04:19 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 SW  @  05:20 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23     @  04:20 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23     @  04:20 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 SW  @  04:20 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 SW  @  04:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 SW  @  04:20 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SW  @  04:20 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19     @  04:20 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….11.1 SSW [266 total miles] VECTOR #1………………..11.3
VECTOR #2………………..12.0
DAVIS #1…………………10.7 SSW
DAVIS #2…………………11.9 SSW
RMY #1…………………..11.1 SSW
RMY #2…………………..12.1 SW
RICHARDS (C5C)……………10.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.05
TOTAL PRECIPITATION FOR THE MONTH…………..3.78 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE YEAR…………..24.43 DEPARTURE…..-1.89

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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/-7/0.01/…/..             22 ENE  VEC1 23 NE  RMY 22
6/23  80/58/69/+0/0.04/…/..             18 SSW  VEC1 19 SSW RMY 19
6/24  77/66/72/+3/0.12/…/..             29 SW   VEC1 29 SW  RMY 31

6/25  The low since midnight is 67F, the daily normal low is 61F

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 25
HIGH 93F IN 1943, 1980, 2005
LOW 47F IN 1903
PRECIP 1.38 INS IN 2012
PEAK GUST 51 MPH W IN 1960

RECORDS FOR JUNE 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.22 INS IN 1938
PEAK GUST 48 MPH N IN 1998

TODAY’S REPORT PREPARED BY: Matt Douglas