Thursday, August 24, 2023

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

THURSDAY, AUGUST 24, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0501E
SUNSET:  1832E

WARMER TEMPERATURES MOVE IN, LIMITED VISIBILITY AND
INCREASING CLOUDS BY THE EARLY AFTERNOON…

Warmer temperatures moved in quickly today, along with dew
points in the upper 50’s which was quite a dramatic shift
from the past couple of days. With the temperatures warming
up closer to average, increasing cumulus clouds began to move
in by early afternoon. Still, a beautiful day, but it has felt
more like a summer day than the fall-like vibes we were
experiencing earlier this week.

There was a slight breeze from the WSW this morning that
changed to the SSW this afternoon. The average wind speed is
about 8 mph so far for today with a peak gust occurring shortly
before noontime at around 18 mph.

The warmer temperatures and dew points impacted our visibility,
as we were only able to see around 40 miles for the majority of
the day.

The maximum temperature so far today has been 77F, which is
2 degrees below the normal high of 79F. The minimum temperature
since midnight is 58F, which is 4 degrees below the normal low
of 62F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few cirrostratus SSW-W
Temperature: 61F; Dew Point: 58F; Relative Humidity: 89%
Wind: WSW @ 5 kts, wind light
Sea-level pressure: 1020.4 mb; 30.13 in. Hg: rising steadily
Visibility: 40 miles, hazy
6-hr Max temp: 61F
6-hr Min temp: 58F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 40 204/61/58/2505/013/ FEW CS SSW-W HAZY WND LGT/
8/005 52008 10061 20058

10 A.M.
Weather: Clear, few cumulus all quadrants
Temperature: 72F; Dew Point: 59F; Relative Humidity: 63%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1020.0 mb; 30.12 in. Hg: rising, then falling
Visibility: 40 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 40 200/72/59/2006/012/ FEW CU ALQDS WND LGT/
8/100 50004

1 P.M.
Weather: Clear, few cumulus all quadrants, few altocumulus SSE-S-W
Temperature: 77F; Dew Point: 56F; Relative Humidity: 48%
Wind: SSW @ 7 kts
Sea-level pressure: 1019.3 mb; 30.10 in. Hg: steady, then falling
Visibility: 40 miles
6-hr Max temp: 77F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 40 193/77/56/2107/010/ FEW CU ALQDS FEW AC SSE-S-W
8/150 58007 10077 20061

————————————————————–

SUMMARY FOR WEDNESDAY, AUGUST 23, 2023

TEMPERATURE (DEGREES F)
MAX…….76   NORMAL…..79
MIN…….56   NORMAL…..62
MEAN……66   NORMAL…..71

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-5
TOTAL DEPARTURE FOR THE MONTH…………………-43 [-2.1 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…………….1  DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………..119  DEPARTURE…….-47
TOTAL COOLING UNITS FOR THE SEASON………….541  DEPARTURE…….-12
TOTAL COOLING UNITS LAST SEASON TO DATE……..755  DEPARTURE……-214

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)……….E20 NNE  @  12:28 A.M.
VECTOR #1 (1-Sec)……….20 NNE  @  12:28 A.M.
VECTOR #2 (1-Sec)……….23 NNE  @  12:28 A.M.
DAVIS #1……………….18 NNE  @  12:28 A.M.
DAVIS #2 ………………21 NE   @  12:28 A.M.
RMY #1 (Instantaneous)…..20 NNE  @  12:28 A.M.
RMY #2 (Instantaneous)…..22 NNE  @  12:28 A.M.
MERLIN…………………16 S
RICHARDS (C5C) (Inst)……19      @  12:28 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL……………….13 SSE @  07:39 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE……………13     @  12:46 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE……………14     @  12:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………….13 NNE @  12:46 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….15 S   @  08:23 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE………………13 NNE @  12:46 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE………………14 S   @  07:35 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……….13     @  12:46 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….6.9 N    [166 total miles] VECTOR #1………………..7.5
VECTOR #2………………..7.9
DAVIS #1…………………7.2 NE
DAVIS #2…………………7.5 ENE
RMY #1…………………..7.4 N
RMY #2…………………..7.7 N
RICHARDS (C5C)……………7.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..3.80 DEPARTURE…..+0.85
TOTAL PRECIPITATION FOR THE YEAR…………..38.57 DEPARTURE…..+4.92

————————————————————–

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  76/56/66/-5/0.00/…/..             20 NNE VEC1 20 NNE RMY 20

8/24 The low since midnight is 58F, 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 24
HIGH 92F IN 1947
LOW 43F IN 1971
PRECIP 2.40 INCHES IN 2010
PEAK GUST 54 MPH W IN 1986

RECORDS FOR AUGUST 25
HIGH 93F IN 1947, 1948, 2007
LOW 41F IN 1940
PRECIP 2.69 INCHES IN 2010
PEAK GUST 60e MPH SSW IN 1941

TODAY’S REPORT PREPARED BY: Amanda Joly