Sunday, October 22, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 22, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
ANOTHER SUNNY, DRY, AND WARM DAY ON TOP OF
GREAT BLUE HILL
High pressure continues to stall in the area bringing
clear and dry conditions. The sky remained mostly
sunny with scattered cirrostratus and cirrocumulus
overhead at 7:00 AM EST, scattered cirrostratus
and a few altocumulus at 10:00 AM EST and then
scattered cirrus at 1:00 PM.
The air has remained very dry overnight and continues
to be dry today with humidities remaining below 55%.
The visibility today was 70 miles at each observation
due to a distant haze which remained in the area all day.
Winds have been light and variable today shifting from
the west overnight to the NE by 1:00 PM EST. Temperatures
continue to be above average with a high of 73F by 1:00 PM
EST. This is 15 degrees above the normal of 58F for this
day. So far this October is among the five warmest in
Observatory history.
Today’s Observations:
7 A.M.
Weather: Broken cirrostratus, patches of cirrocumulus overhead
Temperature: 61F; Dew Point: 41F; Wind: N at 7 kts
Sea-level pressure: 30.41 ins. Hg, rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 61F
6-hr Min temp: 59F
24-hr precip: 0.00 ins.
BHO SA 1155 E250 BKN 70 298/61/41/3507/041/ PTCHS CC OVHD
8/002 53015 10061 20059
10 A.M.
Weather: Scattered cirrostratus, few altocumulus in
all directions
Temperature: 69F; Dew Point: 45F; Wind: E at 4 kts,
Wind: Light
Sea-level pressure: 30.43 ins. Hg, rising then falling
Visibility: 70 miles distant haze in all directions
BHO SA 1455 250 SCT 70 305/69/45/1004/043/ FEW AC ALQDS DSNT
HZ ALQDS/ 8/056 50007
1 P.M.
Weather: Scattered cirrus
Temperature: 70F; Dew Point: 52F; Wind: NE at 8 kts
Sea-level pressure: 30.41 ins. Hg, falling, then more slowly
Visibility: 70 miles distant haze in all directions
6-hr Max temp: 73F
6-hr Min temp: 62F
BHO SA 1755 250 SCT 70 298/70/52/0508/041/ DSNT HZ ALQDS/ 8/020
58007 10073 20062
SUMMARY FOR SATURDAY, OCTOBER 21, 2017
TEMPERATURE (DEGREES F)
MAX…..77 NORMAL…..59
MIN…..52 NORMAL…..41
MEAN….65 NORMAL…..50
DEPARTURE FROM 30-YEAR NORMAL……………………+15
TOTAL DEPARTURE FOR THE MONTH…………………..+163 [+7.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..20 DEPARTURE………+15
TOTAL COOLING UNITS FOR THE SEASON…………727 DEPARTURE……..+125
TOTAL COOLING UNITS LAST SEASON TO DATE…….901 DEPARTURE……..-174
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE………-15
TOTAL HEATING UNITS FOR THE MONTH………….102 DEPARTURE……..-149
TOTAL HEATING UNITS FOR THE SEASON…………195 DEPARTURE……..-198
TOTAL HEATING UNITS LAST SEASON TO DATE…….229 DEPARTURE………-34
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 NW AT 3:12 A.M.
AERO……………………20 NW AT 3:12 A.M.
ASOS……………………21 NW AT 3:12 A.M.
DAVIS…………………..20 NW AT 3:11 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………16 NW AT 3:09 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 NW AT 3:13 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 NW AT 3:12 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.1 WSW
ASOS…………………..9.5
DAVIS………………….8.8 W [278 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.50 DEPARTURE……-2.63
ASOS…………..0.50
TOTAL PRECIPITATION FOR THE YEAR……….42.36 DEPARTURE……+0.15
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
10/1 65/42/54/-3/0.00/697/99 18 WNW AERO 16 NW RMY N/A
10/2 65/46/56/-1/0.00/687/98 21 NNW AERO 21 NNW RMY 21
10/3 67/50/59/+3/0.00/677/97 21 S AERO 21 S RMY N/A
10/4 75/50/63/+7/0.00/660/95 30 SSW AERO 30 SW RMY 32
10/5 79/60/70/+14/0.00/429/62 28 SW AERO 26 SW RMY N/A
10/6 73/57/65/+10/T/352/51 15 NW AERO 14 NW RMY 15
10/7 75/59/67/+12/T/344/50 29 S AERO 30 SSW RMY N/A
10/8 71/67/69/+15/0.23/007/01 33 S AERO 36 SSW RMY 37
10/9 71/68/70/+16/0.22/000/00 43 S AERO 41 S RMY 45
10/10 76/61/69/+15/0.00/637/94 21 WNW AERO 20 WNW RMY 21
10/11 68/55/62/+9/0.00/122/18 29 ENE AERO 25 ENE RMY 29
10/12 58/48/50/0/T/…/.. 30 NE AERO 28 ENE RMY 30
10/13 64/48/56/+3/0.00/…/.. 20 E AERO 16 E RMY 17
10/14 66/54/60/+8/…/…/.. 15 SSE AERO 13 SSE RMY 13
10/15 72/58/65/+13/…/…/.. 39 SSW AERO 36 SSW RMY 40
10/16 66/39/53/+2/…/…/.. 28 NNW AERO 25 NNW RMY 29
10/17 57/35/46/-5/0.00/…/.. 25 S AERO 22 S RMY 25
10/18 70/45/58/+7/0.00/…/.. 25 SW AERO 23 SW RMY 22
10/19 72/52/62/+12/0.00/…/.. 31 SSW AERO 30 SSW RMY 32
10/20 68/53/61/+11/0.00/…/.. 28 WNW AERO 25 WNW RMY 29
10/21 77/52/65/+15/0.00/…/.. 21 NW AERO 20 NW RMY 18
10/22 Low temp since midnight is 59F; normal low is now 41F
DAILY RECORDS FOR OCTOBER
10/8/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 67F,
BREAKS PREVIOUS RECORD OF 60F SET IN 1944
10/9/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
BREAKS PREVIOUS RECORD OF 61F SET IN 2011
10/9/17: MONTHLY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
BREAKS PREVIOUS RECORD OF 67F SET ON OCTOBER 13, 1990
AND TIED ON OCTOBER 8, 2017
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 22
HIGH 85F IN 1979
LOW 22F IN 1940
PRECIP 2.38 INCHES IN 2014
SNOWFALL TRACE IN 1969, 2010
PEAK GUST 67 MPH ESE IN 1988
RECORDS FOR OCTOBER 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
