Saturday, August 31, 2024

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

SATURDAY, AUGUST 31, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0509E
SUNSET:  1819E

PLEASANT WITH MIX OF CLOUDS SUNSHINE TO WRAP UP AUGUST….

The skies were quite gray as we began the day, with clouds of all
heights present. As we progressed through the morning hours, the
mid-level clouds mostly departed. Cumulus and cirrus remain, leading
to a mix of clouds and filtered sun.

The temperature dropped into the upper 50s early this morning before
rising to the low 80s by the early afternoon. The dew point has risen a
touch but remains in the low 60s, making it a bit stickier out there
than yesterday.

Winds have been steady but remain on the lighter side, with an average
so far of approximately 10mph. The flow is primarily out of the
south. Our peak gust thus far is only 18mph, occurring around 11:45am.

Visibility was poor this morning due to thin fog and low clouds, limited
to 15 miles at the first observation at 7am. Since then, it has improved to
40 miles.

The maximum temperature so far today is 82F, which is 4 degrees
above the normal high of 78F. The minimum temperature since
midnight is 58F, which is 2 degrees below the normal low of 60F.

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Today’s Observations:

7 A.M.
Weather: Broken altocumulus, broken cirrus,
few stratus distant S-W-NNW
Temperature: 62F; Dew Point: 61F; Relative Humidity: 97%
Wind: S @ 6 kts, wind light
Sea-level pressure: 1022.6 mb ; 30.20 in. Hg: falling, then rising
Visibility: 15 miles, thin fog all quadrants
6-hr Max temp: 62F
6-hr Min temp: 58F
24-hr Precip:  0.00 inches
BHO SA 1155 E65 BKN 250 BKN 15 226/62/61/1906/020/ FEW ST DSNT S-W-NNW
THN F ALQDS WND LGT/ 8/651 55000 10062 20058

10 A.M.
Weather: Broken cumulus, broken altocumulus/altostratus,
broken cirrus
Temperature: 74F; Dew Point: 63F; Relative Humidity: 68%
Wind: S @ 8 kts
Sea-level pressure: 1021.7 mb; 30.17 in. Hg: falling unsteadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E35 BKN 70 BKN 250 BKN 30 217/74/63/1708/017/ HAZY/
8/271 57009

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 80F; Dew Point: 62F; Relative Humidity: 55%
Wind: SSW @ 8 kts
Sea-level pressure: 1019.0 mb; 30.09 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 82F
6-hr Min temp: 62F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 250 BKN 40 190/80/62/2008/009/ HAZY/ 8/201 58027
10082 20062

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SUMMARY FOR FRIDAY, AUGUST 30, 2024

TEMPERATURE (DEGREES F)
MAX…….73  NORMAL…..78
MIN…….56  NORMAL…..61
MEAN……65  NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-4
TOTAL DEPARTURE FOR THE MONTH…………………….-16 [-0.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………11  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE SEASON…………..11  DEPARTURE……..-6
TOTAL HEATING UNITS LAST SEASON TO DATE……….1  DEPARTURE…….+10

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………..192  DEPARTURE…….-12
TOTAL COOLING UNITS FOR THE SEASON………….689  DEPARTURE…….+98
TOTAL COOLING UNITS LAST SEASON TO DATE……..570  DEPARTURE……+119

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)……….E20 E    @   01:11 P.M.
VECTOR #1 (1-Sec)……….19 ENE  @   01:49 P.M.
VECTOR #2 (1-Sec)……….21 ENE  @   01:11 P.M.
DAVIS #1……………….20 E    @   10:27 A.M.
DAVIS #2 ………………20 E    @   01:11 P.M.
RMY #1 (Instantaneous)…..20 E    @   01:10 P.M.
RMY #2 (Instantaneous)…..22 ENE  @   01:11 P.M.
MERLIN…………………19 E
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 ENE  @   01:12 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13      @   01:20 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15      @   01:12 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 E    @   01:12 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 E    @   01:12 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 ENE  @   01:12 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 ENE  @   01:12 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.4 ENE [201 total miles] VECTOR #1……………..8.5
VECTOR #2……………..9.1
DAVIS #1………………8.9 E
DAVIS #2………………9.0 E
RMY #1………………..8.4 E
RMY #2………………..9.0 E
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..2.96 DEPARTURE…..-0.84
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.21 DEPARTURE…..+6.71

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PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1   92/71/82/+9/T/779/90                24 W   VEC1 24 W   RMY 23
8/2   94/73/84/+11/0.01/579/67            31 SSW VEC1 31 SSW RMY 30 TSTM
8/3   92/75/84/+11/0.00/612/71            29 W   VEC1 28 W   RMY 28
8/4   85/68/77/+4/0.20/318/37             29 WSW VEC1 29 WSW RMY 31 TSTM
8/5   90/67/79/+6/T/686/80                28 SSW VEC1 28 SSW RMY 29
8/6   73/60/67/-6/0.56/009/01             26 ENE VEC1 26 ENE RMY 26
8/7   69/57/63/-10/0.18/119/14            25 NE  VEC1 23 NE  RMY 23
8/8   72/58/65/-7/0.09/187/22             20 ESE VEC1 20 ESE RMY 19
8/9   82/62/72/0/0.48/127/15              50 SSW VEC1 48 S   RMY 50
8/10  85/68/77/+5/0.37/659/78             41 SSW VEC1 41 SSW RMY 43
8/11  81/63/72/0/0.00/741/88              30 W   VEC1 29 SW  RMY 30
8/12  77/59/68/-4/0.15/638/76             35 WNW VEC1 34 WNW RMY 36
8/13  80/58/69/-3/0.00/787/94             21 NW  VEC1 22 NW  RMY 21
8/14  82/62/72/0/0.00/676/81              16 NNW VEC1 15 NNW RMY 15
8/15  84/62/73/+1/0.57/491/59             44 N   VEC1 42 N   RMY 46 TSTM
8/16  74/61/68/-4/0.00/415/50             13 ESE VEC1 13 ESE RMY 13
8/17  75/60/68/-4/0.00/323/39             17 SE  VEC1 16 SE  RMY 15
8/18  71/62/67/-4/0.09/008/01             18 SE  VEC1 19 SE  RMY 17
8/19  78/66/72/+1/0.19/164/20             23 SSW VEC1 23 SSW RMY 22 TSTM
8/20  69/54/62/-9/0.07/238/29             32 NW  VEC1 32 NW  RMY 33
8/21  73/51/62/-9/0.00/752/92             20 WNW VEC1 19 WNW RMY 20
8/22  73/52/63/-8/0.00/766/94             20 W   VEC1 20 WNW RMY 20
8/23  81/58/70/-1/0.00/788/97             22 WNW VEC1 21 WNW RMY 22
8/24  84/61/73/+2/0.00/735/91             20 WNW VEC1 19 WNW RMY 18
8/25  84/62/73/+3/0.00/540/67             17 W   VEC1 17 W   RMY 17
8/26  80/64/72/+2/T/546/68                18 NE  VEC1 18 NE  RMY 17
8/27  83/61/72/+2/0.00/705/88             20 SW  VEC1 20 WSW RMY 20
8/28  88/64/76/+6/0.00/575/72             30 WNW VEC1 30 WNW RMY 30
8/29  71/57/64/-6/0.00/…/..             24 ENE VEC1 23 ENE RMY 23
8/30  73/56/65/-4/0.00/…/..             20 E   VEC1 19 ENE RMY 20

8/31  The low since midnight is 58F, the daily normal low is 60F.

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AUGUST DAILY RECORDS TO DATE

8/3  RECORD HIGH MINIMUM TEMPERATURE OF 75F,
TIED THE PREVIOUS RECORD SET IN 2020

8/15 PEAK GUST 44 MPH N,
TIED THE PREVIOUS RECORD SET IN 1941

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

RECORDS FOR AUGUST 31
HIGH 94F IN 1953
LOW 42F IN 1976
PRECIP 2.46 INCHES IN 1954
PEAK GUST 125 MPH SE IN 1954 [CAROL – RECORD FOR MONTH]

RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975, 2017
PRECIP 2.32 INCHES IN 2013
PEAK GUST 59e MPH S IN 1945, SSW IN 1965

TODAY’S REPORT PREPARED BY: Joshua Polen