Saturday, August 19, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, AUGUST 19, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0455E
SUNSET: 1839E
COOL DAY STARTING WITH SUN AND ENDING IN CLOUDS WITH INCREASING
VISIBILITY…
Cloud cover from 7 AM through 1 PM increased significantly with
only scattered clouds observed in the morning and an overcast sky
by the early afternoon. Visibility, however, increased as the day
went on, starting at 40 miles and increasing to 70 miles by the
10 o’clock observation.
Temperatures have been relatively cool in the area today. The
maximum temperature so far today has been 72F, which is 8
degrees below the normal high for today of 80F. The minimum
temperature since midnight is 57F, which is 5 degrees above the
normal low of 63F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 61F; Dew Point: 53F; Relative Humidity: 76%
Wind: SW @ 9 kts
Sea-level pressure: 1012.6 mb; 29.90 in. Hg: rising unsteadily
Visibility: 40 miles
6-hr Max temp: 61F
6-hr Min temp: 57F
24-hr Precip: 1.46 inches
BHO SA 1155 15 SCT 250 SCT 40 126/61/53/2209/990/ 8/203 52026
70146 10061 20057
10 A.M.
Weather: Broken stratocumulus
Temperature: 67F; Dew Point: 55F; Relative Humidity: 64%
Wind: W @ 10 kts
Sea-level pressure: 1013.7 mb; 29.93 in. Hg: falling, then rising
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E15 BKN 70 137/67/55/2610/993/ 8/400 53011
1 P.M.
Weather: Overcast stratocumulus
Temperature: 67F; Dew Point: 55F; Relative Humidity: 65%
Wind: W @ 13 kts
Sea-level pressure: 1012.8 mb; 29.91 in. Hg: steady then falling
Visibility: 70 miles
6-hr Max temp: 72F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 E15 OVC 70 128/67/55/2613/991/ 8/4// 58009 10072 20061
————————————————————–
SUMMARY FOR FRIDAY, AUGUST 18, 2023
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..80
MIN…….61 NORMAL…..63
MEAN……70 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-1
TOTAL DEPARTURE FOR THE MONTH…………………-30 [-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……..-4
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE…….-11
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….5 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH…………..102 DEPARTURE…….-32
TOTAL COOLING UNITS FOR THE SEASON………….524 DEPARTURE……..+3
TOTAL COOLING UNITS LAST SEASON TO DATE……..707 DEPARTURE……-183
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 W @ 03:10 P.M.
VECTOR #1 (1-Sec)……….34 W @ 03:10 P.M.
VECTOR #2 (1-Sec)……….34 W @ 06:41 P.M.
DAVIS #1……………….31 W @ 03:10 P.M.
DAVIS #2 ………………30 W @ 09:39 P.M.
RMY #1 (Instantaneous)…..33 W @ 03:10 P.M.
RMY #2 (Instantaneous)…..32 W @ 06:41 P.M.
MERLIN…………………30 W
RICHARDS (C5C) (Inst)……32 @ 03:10 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL……………….22 W @ 03:10 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE……………21 @ 03:11 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE……………22 @ 07:04 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………….22 WSW @ 03:11 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….22 W @ 09:40 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE………………21 W @ 03:11 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE………………22 W @ 07:04 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……….20 @ 03:10 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.9 SSW [237 total miles]
VECTOR #1………………10.0
VECTOR #2………………10.6
DAVIS #1……………….10.1 SW
DAVIS #2……………….10.4 WSW
RMY #1………………….9.7 SW
RMY #2…………………10.5 SW
RICHARDS (C5C)………….10.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..1.46 DEPARTURE…..+1.34
TOTAL PRECIPITATION FOR THE MONTH…………..4.41 DEPARTURE…..+0.62
TOTAL PRECIPITATION FOR THE YEAR…………..39.18 DEPARTURE…..+4.69
————————————————————–
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/…/.. 15 E VEC1 14 E RMY 14
8/18 79/61/70/-1/1.48/…/.. 29 W VEC1 34 W RMY 33 TSTM
8/19 The low since midnight is 57F, the daily normal low is 63F
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR AUGUST 20
HIGH 94F IN 2022
LOW 48F IN 1896, 1905, 1949
PRECIP 2.71 INCHES IN 1970
PEAK GUST 47 MPH W IN 1983, 47 SSW IN 2010
TODAY’S REPORT PREPARED BY: Samantha Richard
