Saturday, October 28, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, OCTOBER 28, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
BEAUTIFUL PARTLY SUNNY FALL DAY…
After a relatively warm morning low of 47F, the temperature
climbed into the middle 60s today. There was plenty of
sunshine this morning, which became more filtered during the
day by low cumulus and thin high cirrus. The visibility has
been lower than yesterday due to a persistent haze, which
allowed the visibility to climb only from about 30 miles at
7 AM EST to about 45 miles at the 1 PM EST observation.
Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant SW, patchy ground fog ESE-NW,
hazy
Temperature: 50F; Dew Point: 46F; Wind: S at 10 kts
Sea-level pressure: 30.11 ins. Hg, rising unsteadily
Visibility: 30 miles, ESE-NW 20 miles, WNW 40 miles above haze layer
6-hr Max temp: 50F
6-hr Min temp: 47F
24-hr precip: 0.00 ins.
BHO SA 1155 CLR 30 195/50/46/1810/011/ FEW CI DSNT SW PTCHY GF ESE-NW
VSBY WSW-NW 20 VSBY WNW 40 ABV HZ LYR HAZY/ 8/001 52006 10050 20047
10 A.M.
Weather: Scattered cumulus, scattered cirrus, hazy
Temperature: 61F; Dew Point: 51F; Wind: S at 10 kts
Sea-level pressure: 30.11 ins. Hg, rising slightly
Visibility: 35 miles
BHO SA 1455 25 SCT 250 SCT 35 196/61/51/1810/011/ HAZY/ 8/101 50001
1 P.M.
Weather: Scattered cumulus, thin broken cirrus, few altocumulus SSE-SW,
hazy
Temperature: 65F; Dew Point: 48F; Wind: S at 13G21kts,
Sea-level pressure: 30.04 ins. Hg, falling unsteadily
Visibility: 45 miles
6-hr Max temp: 66F
6-hr Min temp: 50F
BHO SA 1755 35 SCT 250 –BKN 45 173/65/48/1813G21/004/ FEW AC SSE-SW
HAZY/ 8/101 57023 10066 20050
SUMMARY FOR FRIDAY, OCTOBER 27, 2017
TEMPERATURE (DEGREES F)
MAX…..60 NORMAL…..57
MIN…..42 NORMAL…..39
MEAN….51 NORMAL…..48
DEPARTURE FROM 30-YEAR NORMAL…………………….+3
TOTAL DEPARTURE FOR THE MONTH…………………..+230 [+8.3 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..24 DEPARTURE………+19
TOTAL COOLING UNITS FOR THE SEASON…………731 DEPARTURE……..+129
TOTAL COOLING UNITS LAST SEASON TO DATE…….901 DEPARTURE……..-170
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH………….137 DEPARTURE……..-213
TOTAL HEATING UNITS FOR THE SEASON…………230 DEPARTURE……..-262
TOTAL HEATING UNITS LAST SEASON TO DATE…….349 DEPARTURE……..-119
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 W AT 1:06 A.M.
AERO……………………25 W AT 1:06 A.M.
ASOS……………………28 W AT 1:07 A.M.
DAVIS…………………..28 W AT 1:07 A.M. RMY 25
FASTEST MILE FOR YESTERDAY…………………29 W AT 1:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………29 W AT 1:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..28 W AT 1:17 A.M.
AVERAGE WIND SPEED AND DIRECTION………….12.0 WSW
ASOS………………….11.2
DAVIS…………………11.1 WSW [256 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……….2.82 DEPARTURE……-1.24
ASOS…………..2.93
TOTAL PRECIPITATION FOR THE YEAR……….44.68 DEPARTURE……+1.54
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/169/25 30 NE AERO 28 ENE RMY 30
10/13 64/48/56/+3/0.00/545/81 20 E AERO 16 E RMY 17
10/14 66/54/60/+8/…/637/94 15 SSE AERO 13 SSE RMY 13
10/15 72/58/65/+13/…/067/10 39 SSW AERO 36 SSW RMY 40
10/16 66/39/53/+2/…/146/22 28 NNW AERO 25 NNW RMY 29
10/17 57/35/46/-5/0.00/007/01 25 S AERO 22 S RMY 25
10/18 70/45/58/+7/0.00/659/100 25 SW AERO 23 SW RMY 22
10/19 72/52/62/+12/0.00/649/99 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 73/54/64/+15/0.00/…/.. 21 ENE AERO 16 ENE RMY 17
10/23 69/50/60/+11/0.00/…/.. 24 SSE AERO 24 SSE RMY N/A
10/24 73/64/69/+20/…/…/.. 50 SSE AERO 51 S RMY N/A
10/25 69/57/63/+14/…/…/.. 50 SSW AERO 50 SSW RMY N/A
10/26 60/44/52/+4/…/…/.. 40 W AERO 41 W RMY 39
10/27 60/42/51/+3/0.00/…/.. 28 W AERO 25 W RMY N/A
10/28 Low temp since midnight is 47F; normal low is now 39F
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
10/24/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 64F,
BREAKS PREVIOUS RECORD OF 61F SET IN 2001
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 28
HIGH 81F IN 1919
LOW 23F IN 1914
PRECIP 2.46 INCHES IN 2006
SNOWFALL TRACE IN 1934,1957,1979
PEAK GUST 71 MPH SSW IN 1995
RECORDS FOR OCTOBER 29
HIGH 74F IN 1989
LOW 23F IN 1891
PRECIP 2.42 INCHES IN 2012
SNOWFALL 4.0 INCHES IN 2011
PEAK GUST 76 E IN 2012
TODAY’S REPORT PREPARED BY: Mike Iacono / Rob Millette
