Wednesday, August 23, 2023

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

WEDNESDAY, AUGUST 23, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0500E
SUNSET:  1833E

ANOTHER FANTASTIC DAY ON BLUE HILL WITH CLEAR SKIES, LOWER
DEW POINTS, AND BEAUTIFUL VIEWS ALL AROUND…

The lower temperatures and clear skies continue from yesterday
giving us a beautiful almost fall-like day. With temperatures
starting in the low 60’s and rising to the mid 70’s, it’s been
a fantastic day to get out and enjoy the weather. Dry conditions
with dew points in the lower 50’s and winds from the North bring
a refreshing, cool feel to the air.

The wind has been very quiet today, with an average of only about
7 mph. The peak gust for the day so far occurred shortly after
midnight at around 20 mph.

Visibility continues to be pretty high today from the lower dew
points and stable atmospheric conditions. We have seen upwards of
70 miles through most of the day.

The maximum temperature so far today has been 75F, which is
5 degrees below the normal high of 80F. The minimum temperature
since midnight is 56F, which is 6 degrees below the normal low
of 62F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few cumulus distant NNE-SE, few cirrostratus
SE-S-SW
Temperature: 60F; Dew Point: 53F; Relative Humidity: 77%
Wind: N @ 6 kts, wind light
Sea-level pressure: 1022.1 mb; 30.18 in. Hg: rising steadily
Visibility: 70 miles
6-hr Max temp: 60F
6-hr Min temp: 56F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 221/60/53/0006/018/ FEW CU DSNT NNE-SE
FEW CS SE-S-SW WND LGT/ 8/108 52012 10060 20056

10 A.M.
Weather: Clear, few cumulus E-SSE few cumulus distant W-NW
Temperature: 70F; Dew Point: 48F; Relative Humidity: 45%
Wind: ENE @ 4 kts, wind light and variable
Sea-level pressure: 1021.8 mb; 30.17 in. Hg: steady, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 218/70/48/0604/017/ FEW CU E-SSE FEW CU DSNT
W-NW WND L/V/ 8/100 58003

1 P.M.
Weather: Clear, few cumulus SSE-W-N
Temperature: 73F; Dew Point: 53F; Relative Humidity: 49%
Wind: Calm
Sea-level pressure: 1020.4 mb; 30.13 in. Hg: falling, then more
slowly
Visibility: 70 miles
6-hr Max temp: 75F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 70 204/73/53/0000/013/ FEW CU SSE-W-N WND CALM/
8/100 56014 10075 20060

————————————————————–

SUMMARY FOR TUESDAY, AUGUST 22, 2023

TEMPERATURE (DEGREES F)
MAX…….75   NORMAL…..80
MIN…….59   NORMAL…..62
MEAN……67   NORMAL…..71

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-4
TOTAL DEPARTURE FOR THE MONTH…………………-38 [-1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0  DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE…….-13
TOTAL HEATING UNITS LAST SEASON TO DATE……….0  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….2  DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………..118  DEPARTURE…….-42
TOTAL COOLING UNITS FOR THE SEASON………….540  DEPARTURE……..-6
TOTAL COOLING UNITS LAST SEASON TO DATE……..750  DEPARTURE……-210

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 NNE  @  02:22 A.M.
VECTOR #1 (1-Sec)……….29 NNE  @  02:21 A.M.
VECTOR #2 (1-Sec)……….29 NE   @  03:27 A.M.
DAVIS #1……………….27 NNE  @  02:22 A.M.
DAVIS #2 ………………26 NE   @  03:27 A.M.
RMY #1 (Instantaneous)…..29 NNE  @  02:21 A.M.
RMY #2 (Instantaneous)…..28 NNE  @  02:21 A.M.
MERLIN…………………23 NNE
RICHARDS (C5C) (Inst)……27      @  02:22 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL……………….20 NNE @  02:22 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE……………20     @  02:22 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE……………20     @  02:22 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………….20 NNE @  02:23 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….19 NNE @  02:23 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE………………19 NNE @  02:22 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE………………20 NNE @  02:22 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……….19     @  02:22 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….8.4 NNE [201 total miles] VECTOR #1………………..8.7
VECTOR #2………………..9.0
DAVIS #1…………………8.7 NNE
DAVIS #2…………………8.7 NE
RMY #1…………………..8.0 NNE
RMY #2…………………..8.3 NNE
RICHARDS (C5C)……………9.1

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..3.80 DEPARTURE…..+0.97
TOTAL PRECIPITATION FOR THE YEAR…………..38.57 DEPARTURE…..+5.04

————————————————————–

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   76/58/67/-6/0.00/763/88             24 NW  VEC1 24 NW  RMY 24
8/2   75/54/65/-8/0.00/830/96             23 SSW VEC1 22 SSW RMY 23
8/3   79/59/69/-4/0.00/725/84             32 SSW VEC1 34 SSW RMY 34
8/4   77/62/70/-3/T/172/20                29 SSW VEC1 29 SSW RMY 29
8/5   83/66/75/+2/0.00/523/61             18 NW  VEC1 16 WNW RMY 17
8/6   82/60/71/-2/0.00/839/98             20 W   VEC1 19 W   RMY 19
8/7   72/65/69/-4/0.14/034/04             29 SSE VEC1 30 SSE RMY 29
8/8   82/68/75/+3/0.47/187/22             39 S   VEC1 42 S   RMY 42
8/9   82/66/74/+2/0.00/756/89             39 WNW VEC1 38 WNW RMY 38
8/10  83/64/74/+2/0.02/254/30             28 SSW VEC1 27 SSW RMY 28
8/11  80/63/72/+0/0.07/810/96             36 W   VEC1 36 W   RMY 38
8/12  84/61/73/+1/0.00/733/87             26 SSW VEC1 26 SSW RMY 26
8/13  84/68/76/+4/0.07/629/75             26 SSW VEC1 26 SSW RMY 27 TSTM
8/14  82/63/73/+1/T/536/64                25 W   VEC1 24 W   RMY 29
8/15  70/64/67/-5/0.70/000/00             28 NE  VEC1 27 NE  RMY 28
8/16  68/64/66/-6/T/000/00                18 ESE VEC1 19 ENE RMY 18
8/17  70/62/66/-6/T/116/14                15 E   VEC1 14 E   RMY 14
8/18  79/61/70/-1/1.48/298/36             32 W   VEC1 34 W   RMY 33 TSTM
8/19  72/57/65/-6/0.00/371/45             29 W   VEC1 30 W   RMY 30
8/20  81/59/70/-1/0.00/764/93             23 W   VEC1 22 W   RMY 21
8/21  84/64/74/+3/0.85/…/..             29 NE  VEC1 30 ENE RMY 29
8/22  75/59/67/-4/0.00/…/..             29 NNE VEC1 29 NNE RMY 29

8/23 The low since midnight is 56F, the daily normal low is 62F

————————————————————–

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

RECORDS FOR AUGUST 23
HIGH 89F IN 2020
LOW 45F IN 1923
PRECIP 2.21 INCHES IN 2020
PEAK GUST 60e MPH NW IN 1940, 60 WNW IN 2020* [*THUNDERSTORM]

RECORDS FOR AUGUST 24
HIGH 92F IN 1947
LOW 43F IN 1971
PRECIP 2.40 INCHES IN 2010
PEAK GUST 54 MPH W IN 1986

TODAY’S REPORT PREPARED BY: Amanda Joly