Monday, September 23, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 23, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
HOT AND HUMID TODAY ON THIS FIRST DAY OF ASTRONOMICAL FALL,
COULD REALLY USE SOME RAIN…
The main story of today is the very warm to hot temperatures
and high dew points (especially for this time of year). We
have reached the upper 80s so far this afternoon with a max
through 1pm EST of 88F. Dew points have risen into the upper
60s making it feel rather uncomfortable outside. The only
saving grace has been the breeze which has gusted as high as
26 mph so far.
The other story is the lack of rainfall this month, with
only 0.98″ for the month to date, we are running almost 2
inches below normal for the month. The dry conditions are
starting to show stress on the trees. Those that are showing
color changes already are rather dull looking. Hopefully we
can get a little rain over the next few weeks to help brighten
the colors in time for peak foliage mid to late next month.
Our normal high temperature for today is 69F, thus the 88F
so far today is 19 degrees above normal. Our low since
midnight was 65F, which is 13 degrees above our normal low
of 52F.
Today’s Observations:
7 A.M.
Weather: Scattered Altocumulus, scattered Cirrocumulus, broken cirrus;
few stratocumulus distant E-SE
Temperature: 69F; Dew Point: 65F; Wind: SSW at 14 kts, gusting to 20 kts
Sea-level pressure: 29.89 ins. Hg, falling, then more slowly
Visibility: 30 miles, Hazy
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 70 SCT E200 BKN 250 BKN 30 121/69/65/2014G20/989/
FEW SC DSNT E-SE HAZY/ 8/539 55003 10069 20065
10 A.M.
Weather: Scattered cirrocumulus, broken cirrus; few altocumulus distant E-SE-SW and W
Temperature: 79F; Dew Point: 66F; Wind: SW at 15 kts, gusting to 23 kts
Sea-level pressure: 29.85 ins. Hg, falling, then more rapidly
Visibility: 25 miles, Hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 180 SCT E250 BKN 25 108/79/66/2215G23/985/
FEW AC E-SE-SW AND W HAZY/ 8/039 58013
1 P.M.
Weather: Scattered cirrocumulus, Thin scattered cirrus, few cumulus distant W
Temperature: 86F; Dew Point: 68F; Wind: SSW at 13 kts, gusting to 22 kts
Sea-level pressure: 29.78 ins. Hg, falling, then more rapidly
Visibility: 30 miles, Hazy
6-hr Max temp: 88F
6-hr Min temp: 69F
6-hr Precip: 0.00 ins.
BHO SA 1755 200 SCT 250 –SCT 30 083/86/68/2014G22/978/
FEW CU DSNT NW HAZY/ 8/209 58025 10088 20069
SUMMARY FOR SUNDAY, SEPTEMBER 22, 2019
TEMPERATURE (DEGREES F)
MAX…..85 NORMAL…..69
MIN…..62 NORMAL…..52
MEAN….74 NORMAL…..61
DEPARTURE FROM 30-YEAR NORMAL…………………+13
TOTAL DEPARTURE FOR THE MONTH…………………-16 [-0.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON AUG TO JUL)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH…………..64 DEPARTURE………+2
TOTAL HEATING UNITS FOR THE SEASON………….76 DEPARTURE………+1
TOTAL HEATING UNITS LAST SEASON TO DATE……..33 DEPARTURE……..+43
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9 DEPARTURE………+8
TOTAL COOLING UNITS FOR THE MONTH…………..41 DEPARTURE……..-12
TOTAL COOLING UNITS FOR THE SEASON…………660 DEPARTURE……..+70
TOTAL COOLING UNITS LAST SEASON TO DATE…….855 DEPARTURE…….-195
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 SW AT 3:05 P.M.
AERO…………………….23 SW AT 3:04 P.M.
ASOS…………………….24 SW AT 3:05 P.M.
DAVIS……………………23 SW AT 12:21 P.M. RMY 25
FASTEST MILE FOR YESTERDAY………………….17 SW AT 12:26 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 SW AT 12:24 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 SW AT 12:26 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….11.5 SSW
ASOS…………………….11.8
DAVIS……………………11.2 SW [220 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.98 DEPARTURE……-1.89
ASOS…………..0.96
TOTAL PRECIPITATION FOR THE YEAR……….38.13 DEPARTURE……+0.23
ASOS………….37.99
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
9/01 73/56/65/-3/0.00/…/.. 21 ENE AERO 14 ENE RMY 18
9/02 75/57/66/-2/0.37/…/.. 39 W AERO 41 W RMY 41
9/03 77/61/69/+2/0.00/…/.. 18 S AERO 16 S RMY N/A
9/04 83/61/72/+5/0.00/…/.. 30 SW AERO 28 SW RMY 30
9/05 68/54/61/-6/0.00/…/.. 23 NW AERO 17 NW RMY N/A
9/06 65/56/61/-6/0.03/…/.. 37 ENE AERO 36 ENE RMY 36
9/07 70/51/61/-5/0.27/…/.. 37 N AERO 37 N RMY N/A
9/08 73/53/63/-3/0.00/…/.. 25 W AERO 21 W RMY N/A
9/09 71/54/63/-3/0.00/…/.. 17 SE AERO 16 SE RMY 16
9/10 73/57/65/0/0.00/…/.. 25 S AERO 25 S RMY N/A
9/11 83/63/73/+8/0.00/…/.. 31 SW AERO 32 SW RMY N/A
9/12 70/52/61/-4/0.11/…/.. 29 ENE AERO 28 ENE RMY 28
9/13 65/49/57/-7/0.00/…/.. 29 ENE AERO 27 ENE RMY 27
9/14 69/49/59/-5/0.19/…/.. 36 S AERO 37 S RMY 37
9/15 78/62/70/+6/0.00/…/.. 24 W AERO 23 W RMY 22
9/16 72/54/63/0/0.00/…/.. 25 WNW AERO 23 WNW RMY 25
9/17 67/49/58/-5/0.00/…/.. 23 NW AERO 23 N RMY N/A
9/18 61/49/55/-7/0.00/…/.. 26 NE AERO 25 NE RMY 25
9/19 67/43/55/-7/0.00/…/.. 17 NE AERO 18 NE RMY N/A
9/20 78/50/64/+2/0.00/…/.. 21 W AERO 18 W RMY 20
9/21 83/60/72/+11/0.00/…/.. 21 WNW AERO 18 WNW RMY N/A
9/22 85/62/74/+13/0.00/…/.. 24 SW AERO 23 SW RMY 25
9/23 The low since midnight is 65F, normal daily minimum is 52F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989
RECORDS FOR SEPTEMBER 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940
TODAY’S REPORT PREPARED BY: Matt Douglas
