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Sunday, August 18, 2024

August 18, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, AUGUST 18, 2024 ALL TIMES ARE…

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

SUNDAY, AUGUST 18, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0455E
SUNSET:  1840E

OVERCAST WITH AN OCCASIONAL RAIN SHOWER AND LIGHT WIND….

Today we observed foggy and overcast conditions with 5 miles of
visibility, maximum. Overnight rain amounted to 0.06 inches, and
an additional 0.03 fell since the 7 o’clock observation. Skies
were overcast with stratus clouds, and wind was from the east.
The average wind speed for the day was an unimpressive 5 mph!

The maximum temperature so far today is 68F, which is 12 degrees
below the normal high of 80F. The minimum temperature since
midnight is 62F, which is a degree below the normal low of 63F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Fog, vertical visibility 300ft
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: ENE @ 7 kts
Sea-level pressure: 1015.8 mb ; 29.99 in. Hg: rising then falling
Visibility: 1/2 mile, fog
6-hr Max temp: 64F
6-hr Min temp: 62F
24-hr Precip:  0.06 inches
BHO SA 1155 X W3 1/2RWF 158/63/63/0707/999/ RWB30E55/ 8//// 55002
70006 10064 20062

10 A.M.
Weather: Overcast stratus, light rain shower
Temperature: 67F; Dew Point: 65F; Relative Humidity: 93%
Wind: ESE @ 3 kts, wind light
Sea-level pressure: 1016.0 mb; 30.00 in. Hg: rising then falling
Visibility: 5 miles, fog
3-hr Precip: 0.00 inches
BHO SA 1455 5 OVC 5RW-F 160/67/65/1103/000/ RW-B30E50 WND L/V/ 8/6//
50002 6002/

1 P.M.
Weather: Overcast stratus, light rain shower
Temperature: 68F; Dew Point: 66F; Relative Humidity: 93%
Wind: E @ 3 kts, wind light
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: falling, then more rapidly
Visibility: 5 miles, fog
6-hr Max temp: 68F
6-hr Min temp: 63F
6-hr Precip: 0.03 inches
BHO SA 1755 5 OVC 5RW-F 147/68/66/0903/996/ RW-B30E50 WND L/V/ 8/6//
58013 6003/ 10068 20063

————————————————————–

SUMMARY FOR SATURDAY, AUGUST 17, 2024

TEMPERATURE (DEGREES F)
MAX…….75  NORMAL…..80
MIN…….60  NORMAL…..63
MEAN……68  NORMAL…..72

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-4
TOTAL DEPARTURE FOR THE MONTH……………………..+9 [+0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….2  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON……………2  DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE……….0  DEPARTURE……..+2

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….3  DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………..137  DEPARTURE…….+10
TOTAL COOLING UNITS FOR THE SEASON………….634  DEPARTURE……+120
TOTAL COOLING UNITS LAST SEASON TO DATE……..519  DEPARTURE……+115

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)……….E17 SE   @   07:13 P.M.
VECTOR #1 (1-Sec)……….16 SE   @   07:02 P.M.
VECTOR #2 (1-Sec)……….16 SSE  @   05:07 P.M.
DAVIS #1……………….14 SE   @   05:07 P.M.
DAVIS #2 ………………16 S    @   04:15 P.M.
RMY #1 (Instantaneous)…..15 SE   @   07:47 P.M.
RMY #2 (Instantaneous)…..17 ESE  @   05:08 P.M.
MERLIN…………………14 SE
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 SE   @   07:10 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..11      @   07:13 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12      @   05:08 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………11 SSE  @   07:47 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 SE   @   05:08 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..10 SSE  @   07:47 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 SE   @   05:08 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….5.4 SSE [130 total miles] VECTOR #1……………..6.5
VECTOR #2……………..6.7
DAVIS #1………………6.0 SE
DAVIS #2………………6.1 SSE
RMY #1………………..6.1 SSE
RMY #2………………..6.8 SE
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.06 DEPARTURE…..-0.06
TOTAL PRECIPITATION FOR THE MONTH…………..2.67 DEPARTURE…..+0.46
TOTAL PRECIPITATION FOR THE YEAR (2024)…….40.92 DEPARTURE…..+8.01

————————————————————–

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/…/..             44 N   VEC1 42 N   RMY 46 TSTM
8/16  74/61/68/-4/0.00/…/..             13 ESE VEC1 13 ESE RMY 13
8/17  75/60/68/-4/…./…/..             17 SE  VEC1 16 SE  RMY 15

8/18  The low since midnight is 63F, the daily normal low is 63F.

————————————————————–

AUGUST DAILY RECORDS TO DATE

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

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

————————————————————–

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

RECORDS FOR AUGUST 18
HIGH 93F IN 2002
LOW 49F IN 1918, 1941
PRECIP 4.64 INCHES IN 1955 [DIANE] PEAK GUST 46 MPH WNW IN 2007

RECORDS FOR AUGUST 19
HIGH 92F IN 2019
LOW 48F IN 1958
PRECIP 8.07 INCHES IN 1955 [DIANE – RECORD FOR MONTH] PEAK GUST 78 MPH ENE IN 1991 – HURRICANE BOB

TODAY’S REPORT PREPARED BY: Benjamin Turner

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

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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