Thursday, September 28, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, SEPTEMBER 28, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0538E
SUNSET: 1731E
A MIX OF SUN AND CLOUDS, BUT SEASONABLY COOL TODAY AT BLUE HILL…
Today has featured varying amounts of cloud cover, including
low hanging clouds (fog) this morning off to the south through
north-northwest. These clouds were so low that the tops of them
were below the elevation of Blue Hill, thus it was considered a
broken undercast. Otherwise, a combination of low stratocumulus
and high thin cirrus clouds have been the theme. Also a thin
smoke layer aloft from western wildfires has been moving
across our sky.
Temperatures are slightly below normal with readings reaching
the mid 60s early this afternoon, after bottoming out around
50 this morning. The dew point has been gradually increasing
however, with values rising from the upper 40s early this
morning to the mid 50s early this afternoon.
The wind has been steady, but not a big deal today. The average
speed for the day so far is only around 8mph out of the
northeast and east-northeast. The peak gust thus far has only
been around 18mph.
Visibility has improved from around 10-15 miles early this
morning to around 30 miles this afternoon.
The maximum temperature so far today has been 65F, which is
3 degrees below the normal high of 68F. The minimum temperature
since midnight is 50F, which is 1 degree below the normal low
of 51F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken undercast stratus, broken stratocumulus, thin broken cirrus
Temperature: 52F; Dew Point: 51F; Relative Humidity: 97%
Wind: NE @ 10 kts
Sea-level pressure: 1028.0 mb; 30.36 in. Hg: steady, then rising
Visibility: 12 miles, thin fog
6-hr Max temp: 53F
6-hr Min temp: 50F
24-hr Precip: 0.00 inches
BHO SA 1155 ///BKN E20 BKN 250 -BKN 12 280/52/51/0410/036/ UNDERCAST S-NNW
THN F ALQDS THN K LYR ALF ALQDS/ 8/601 53005 10053 20050
10 A.M.
Weather: Borken stratocumulus, thin broken cirrus
Temperature: 60F; Dew Point: 54F; Relative Humidity: 80%
Wind: ENE @ 8G16 kts
Sea-level pressure: 1028.5 mb; 30.37 in. Hg: rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E15 BKN 250 -BKN 30 285/60/54/0608G16/037/ THN K LYR ALF ALQDS
HAZY/ 8/501 50005
1 P.M.
Weather: Scattered stratocumulus, thin scattered cirrus
Temperature: 64F; Dew Point: 55F; Relative Humidity: 71%
Wind: ENE @ 6 kts, wind light
Sea-level pressure: 1027.6 mb; 30.35 in. Hg: steady, then falling
Visibility: 30 miles
6-hr Max temp: 65F
6-hr Min temp: 52F
6-hr Precip: 0.00 inches
BHO SA 1755 20 SCT 250 -SCT 30 276/64/55/0706/035/ THN K LYR ALF ALQDS
HAZY WND LGT/ 8/501 58009 10065 20052
————————————————————–
SUMMARY FOR WEDNESDAY, SEPTEMBER 27, 2023
TEMPERATURE (DEGREES F)
MAX…….63 NORMAL…..68
MIN…….46 NORMAL…..51
MEAN……55 NORMAL…..60
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-5
TOTAL DEPARTURE FOR THE MONTH…………………+54 [+1.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………10 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH……………71 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………..72 DEPARTURE…….-25
TOTAL HEATING UNITS LAST SEASON TO DATE………72 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………..119 DEPARTURE…….+47
TOTAL COOLING UNITS FOR THE SEASON………….689 DEPARTURE…….+21
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-195
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)……….E18 ENE @ 12:03 P.M.
VECTOR #1 (1-Sec)……….18 E @ 11:17 A.M.
VECTOR #2 (1-Sec)……….20 ENE @ 09:57 A.M.
DAVIS #1……………….18 ENE @ 10:57 A.M.
DAVIS #2 ………………19 E @ 09:57 A.M.
RMY #1 (Instantaneous)…..18 ENE @ 12:02 P.M.
RMY #2 (Instantaneous)…..21 ENE @ 10:58 A.M.
MERLIN…………………17 E
RICHARDS (C5C) (Inst)……17 @ 11:55 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 NNE @ 05:24 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 01:29 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 10:29 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 E @ 10:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 E @ 10:30 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 E @ 10:29 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 E @ 10:29 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14 @ 10:30 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.5 ENE [228 total miles]
VECTOR #1……………….9.3
VECTOR #2………………10.4
DAVIS #1……………….10.1 ENE
DAVIS #2……………….10.2 ENE
RMY #1………………….9.6 NE
RMY #2…………………10.2 ENE
RICHARDS (C5C)…………..9.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..6.17 DEPARTURE…..+2.57
TOTAL PRECIPITATION FOR THE YEAR…………..46.62 DEPARTURE…..+8.41
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 73/52/63/-6/0.00/774/98 23 SSW VEC1 22 SSW RMY 21
9/2 79/56/68/-1/0.00/708/90 25 SW VEC1 24 SW RMY 26
9/3 85/61/73/+5/T/674/86 21 SW VEC1 21 SW RMY 21
9/4 85/68/77/+9/0.00/719/92 17 NW VEC1 16 NW RMY 16
9/5 86/68/77/+9/0.00/647/83 16 NNE VEC1 16 ENE RMY 16
9/6 89/70/80/+12/0.00/722/93 17 WSW VEC1 17 SSW RMY 18
9/7 92/72/82/+15/0.00/726/94 20 SSW VEC1 21 SSW RMY 21
9/8 86/70/78/+11/0.00/293/38 30 SSW VEC1 31 SSW RMY 32 TSTM
9/9 86/68/77/+10/0.49/291/38 30 S VEC1 31 S RMY 29 TSTM
9/10 78/67/73/+7/0.25/008/01 17 NE VEC1 17 NE RMY 15 TSTM
9/11 74/67/71/+5/0.64/023/03 15 E VEC1 15 E RMY 14 TSTM
9/12 79/65/72/+6/T/250/33 18 E VEC1 17 E RMY 18
9/13 76/64/70/+5/1.92/242/32 35 SSW VEC1 35 SSW RMY 36 TSTM
9/14 75/57/66/+1/0.00/670/89 24 NW VEC1 24 NW RMY 24
9/15 66/53/60/-5/0.00/465/62 36 N VEC1 35 N RMY 35
9/16 68/54/61/-3/0.21/022/03 44 WNW VEC1 44 WNW RMY 47
9/17 76/53/65/+1/0.00/685/92 26 WNW VEC1 25 WNW RMY 24
9/18 64/60/62/-1/1.56/000/00 33 WNW VEC1 33 WNW RMY 35 TSTM
9/19 70/56/63/0/0.00/665/90 35 WNW VEC1 37 WNW RMY 36
9/20 72/53/63/0/0.00/714/97 21 WNW VEC1 21 WNW RMY 22
9/21 71/52/62/0/0.00/661/90 17 NNW VEC1 17 NNW RMY 17
9/22 68/54/61/-1/0.00/570/78 23 E VEC1 21 E RMY 22
9/23 58/54/56/-6/0.24/000/00 30 NE VEC1 30 NE RMY 27
9/24 60/56/58/-3/0.73/000/00 30 ENE VEC1 30 ENE RMY 29
9/25 60/55/58/-3/0.13/000/00 38 ENE VEC1 40 ENE RMY 41
9/26 57/47/52/-8/T/209/29 36 NE VEC1 37 NE RMY 39
9/27 63/46/55/-5/0.00/654/91 18 ENE VEC1 18 E RMY 18
9/28 The low since midnight is 50F, the daily normal low is 51F
————————————————————–
SEPTEMBER DAILY RECORDS
09/07/2023: NEW RECORD HIGH DAILY MINIMUM TEMPERATURE OF 72F;
BEATS THE RECORD OF 70F SET IN 1999
09/07/2023: RECORD HIGH TEMPERATURE OF 92F;
TIES THE RECORD OF 92F SET IN 2007 AND 2015
09/08/2023: RECORD HIGH DAILY MINIMUM TEMPERATURE OF 70F;
TIES THE RECORD OF 70F SET IN 2015
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962
RECORDS FOR SEPTEMBER 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005
TODAY’S REPORT PREPARED BY: Matt Douglas
