Monday, June 24, 2024

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

MONDAY, JUNE 24, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET:  1925E

A MIX OF SUN AND CLOUDS, WARM WITH DECREASING HUMIDITY LEVELS….

The sky has featured a mix of sun and clouds through the day with
a nice westerly breeze and lowering humidity levels. It has really
turned into a very fine day after the very humid weekend.

Temperatures didn’t really cool off much overnight with the low
only getting down to 70F (69.6F). Should this reading hold through
midnight tonight (unlikely), it would tie the record high minimum
for the date with 1909. Readings have warm into the upper 70s to
near 80F by early this afternoon. The dew point, which was around
70F early this morning, has dropped into the upper 50s early this
afternoon, making for a much more pleasant feel to the air today.

The wind has been on the busy side today averaging at around 15mph
for the day so far. The direction veered from the southwest to
west-northwest as a boundary moved through the area between 7-8am
this morning. The peak gust so far is 34mph, which occurred just
after midnight.

Visibility has been excellent today with the drier air mass moving
in. The view has been 60-70 miles since early this morning.

The maximum temperature so far today is 80F, which is 2 degrees
above the normal high of 78F. The minimum temperature since
midnight is 70F, which is 10 degrees above the normal low of 60F.

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Today’s Observations:

7 A.M.
Weather: Scattered cumulus, scattered altocumulus, scattered cirrus
Temperature: 74F; Dew Point: 70F; Relative Humidity: 86%
Wind: W at 12G19 kts
Sea-level pressure: 1000.0 mb; 29.53 in. Hg: rising, then steady
Visibility: 60 miles, 25 miles NNE-SE-SSW, thin fog NNE-SE-SSW
6-hr Max temp: 74F
6-hr Min temp: 70F
24-hr Precip:  0.09 inches
BHO SA 1155 15 SCT 100 SCT 250 SCT 60 000/74/70/2712G19/953/
THN F NNE-SE-SSW VSBY 25 NNE-SE-SSW/ 8/251 51001 70009 10074 20070

10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 76F; Dew Point: 62F; Relative Humidity: 62%
Wind: W @ 14G21 kts
Sea-level pressure: 1000.8 mb; 29.55 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip:  0.00 ins.
BHO SA 1455 40 SCT 250 SCT 70 008/76/62/2814G21/955/ 8/201 51008

1 P.M.
Weather: Scattered cumulus, broken altocumulus, broken cirrus,
virga distant W-NW
Temperature: 75F; Dew Point: 57F; Relative Humidity: 54%
Wind: WNW @ 15G24 kts
Sea-level pressure: 1000.9 mb; 29.56 in. Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 80F
6-hr Min temp: 74F
6-hr Precip:  0.00 ins.
BHO SA 1755 40 SCT 65 BKN 250 BKN 70 009/75/57/2915G24/056/
VIRGA DSNT W-NW/ 8/261 50001 10080 20074

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SUMMARY FOR SUNDAY, JUNE 23, 2024

TEMPERATURE (DEGREES F)
MAX…….84  NORMAL…..78
MIN…….59  NORMAL…..60
MEAN……72  NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+3
TOTAL DEPARTURE FOR THE MONTH…………………….+78 [+3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………12  DEPARTURE…….-50
TOTAL HEATING UNITS FOR THE SEASON…………5391  DEPARTURE……-815
TOTAL HEATING UNITS LAST SEASON TO DATE…….5295  DEPARTURE…….+96

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….7  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………98  DEPARTURE…….+27
TOTAL COOLING UNITS FOR THE SEASON………….135  DEPARTURE…….+36
TOTAL COOLING UNITS LAST SEASON TO DATE………72  DEPARTURE…….+63

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated

F420C (Official)……….E38 SSW  @   11:04 P.M.
VECTOR #1 (1-Sec)……….38 SSW  @   11:04 P.M.
VECTOR #2 (1-Sec)……….36 SSW  @   06:44 P.M.
DAVIS #1……………….38 S    @   06:44 P.M.
DAVIS #2 ………………39 S    @   01:58 P.M.
RMY #1 (Instantaneous)…..38 SSW  @   05:13 P.M.
RMY #2 (Instantaneous)…..39 SSW  @   06:44 P.M.
MERLIN…………………33 SSW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 SSW  @   10:51 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27      @   02:46 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28      @   02:45 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 S    @   02:46 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 SSW  @   02:46 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 SSW  @   02:46 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 SSW  @   02:45 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.0 SSW [335 total miles] VECTOR #1…………….13.9
VECTOR #2…………….14.8
DAVIS #1……………..13.5 S
DAVIS #2……………..14.8 S
RMY #1……………….13.6 S
RMY #2……………….15.0 S
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.05
TOTAL PRECIPITATION FOR THE MONTH…………..2.80 DEPARTURE…..-0.88
TOTAL PRECIPITATION FOR THE YEAR (2024)…….33.62 DEPARTURE…..+7.34

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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   79/53/66/+4/0.00/878/97             18 WNW VEC1 20 NW  RMY 20
6/2   83/52/68/+6/0.00/780/86             21 W   VEC1 21 W   RMY 21
6/3   78/57/68/+6/0.00/626/69             22 NE  VEC1 22 NE  RMY 21
6/4   75/55/65/+2/0.00/817/90             20 SSW VEC1 19 SSW RMY 19
6/5   84/56/70/+7/T/564/62                29 SW  VEC1 28 SW  RMY 29
6/6   74/60/67/+4/0.01/064/07             20 SSE VEC1 20 SSE RMY 20
6/7   80/60/70/+6/0.14/410/45             26 WNW VEC1 27 WNW RMY 27
6/8   73/54/64/0/T/767/84                 48 W   VEC1 49 W   RMY 47
6/9   67/55/61/-3/0.25/292/32             29 WNW VEC1 28 WNW RMY 26
6/10  75/54/65/0/T/868/95                 28 W   VEC1 27 W   RMY 27
6/11  71/53/62/-3/0.00/320/35             16 WNW VEC1 15 WNW RMY 15
6/12  76/59/68/+3/0.00/531/58             16 S   VEC1 16 SSE RMY 17
6/13  82/57/70/+4/0.00/869/95             28 SW  VEC1 27 SW  RMY 28
6/14  84/63/74/+9/0.75/476/52             50 NW  VEC1 50 NW  RMY 53 TSTM
6/15  75/54/66/0/0.23/824/90              23 NNW VEC1 27 NW  RMY 26
6/16  72/51/62/-5/0.00/815/89             22 SSE VEC1 23 S   RMY 23
6/17  80/56/68/+1/0.00/596/65             30 SSW VEC1 31 SSW RMY 31
6/18  92/64/78/+11/0.00/853/93            24 SW  VEC1 23 SSW RMY 23
6/19  93/66/80/+12/0.00/642/70            24 SW  VEC1 24 SW  RMY 25
6/20  94/68/81/+13/0.10/706/77            36 NNW VEC1 37 NNW RMY 36 TSTM
6/21  83/61/72/+4/0.90/…/..             28 ENE VEC1 28 ENE RMY 28 TSTM
6/22  69/59/64/-5/0.27/…/..             19 NE  VEC1 21 NE  RMY 21
6/23  84/59/72/+3/0.15/…/..             38 SSW VEC1 38 SSW RMY 38

6/24  The low since midnight is 70F, the daily normal low is 60F.

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JUNE DAILY RECORDS TO DATE

6/19 RECORD MAXIMUM TEMPERATURE OF 93F,
BEATING THE PREVIOUS RECORD OF 92F SET IN 1923

6/20 RECORD MAXIMUM TEMPERATURE OF 94F,
TIED WITH PREVIOUS RECORD SET IN 1953

6/20 RECORD HIGH MINIMUM TEMPERATURE OF 68F,
TIED WITH PREVIOUS RECORD SET IN 1923 AND 1931

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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

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

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

TODAY’S REPORT PREPARED BY: Matt Douglas