Thursday, October 29, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, OCTOBER 29, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
ANOTHER RAINY, CHILLY AND FOGGY DAY….
Fog and light rainfall are again the main features
today, amounting to 0.17 inches since it started this
morning around 9 A.M. We were able to see 4 miles at
the 7 A.M. observation, but could see only a mile by
10 A.M. Wind is light and variable, at an
average speed of around 5 mph.
Temperatures have been on the cool side only reaching the
mid 40’s this afternoon.
The high so far today is 45F, this is 12 degrees below the
daily normal maximum of 57F. The low since midnight is 43F,
which is 4 degrees above the daily normal minimum of 39F.
Today’s Observations:
7 A.M.
Weather: Overcast stratus, patchy fog
Temperature: 44F; Dew Point: 44F; Relative Humidity: 100%
Wind: W at 4 kts, light and variable
Sea-level pressure: 29.93 ins. Hg: falling steadily
Visibility: 4 miles, fog
6-hr Max temp: 44F
6-hr Min temp: 43F
24-hr Precip: 0.23 ins.
BHO SA 1155 25 OVC 4F 137/44/44/2804/993/ PTCHY F ALQDS
WND L/V/ 8/6// 70023 58007 10044 20043
10 A.M.
Weather: Light rain
Temperature: 45F; Dew Point: 45F; Relative Humidity: 100%
Wind: SSE at 3 kts, light and variable
Sea-level pressure: 29.91 ins. Hg: falling steadily
Visibility: 1 mile, fog
3-hr Precip: 0.02 ins.
BHO SA 1455 25 OVC 1R-F 129/45/45/1503/991/ R-CTD WND L/V/
8/6// 6002/ 58008
1 P.M.
Weather: Light rain
Temperature: 44F; Dew Point: 44F; Relative Humidity: 100%
Wind: NNE at 5 kts, light and variable
Sea-level pressure: 29.84 ins. Hg: falling, then more rapidly
Visibility: 2 miles, fog
6-hr Max temp: 45F
6-hr Min temp: 44F
6-hr Precip: 0.17 ins.
BHO SA 1755 25 OVC 2R-F 105/44/44/0205/984/ R-CTD WND L/V/ 8/6//
6017/ 56024 10045 20044
SUMMARY FOR WEDNESDAY, OCTOBER 28, 2020
TEMPERATURE (DEGREES F)
MAX…..49 NORMAL…..57
MIN…..42 NORMAL…..39
MEAN….46 NORMAL…..48
DEPARTURE FROM 30-YEAR NORMAL……………. -2
TOTAL DEPARTURE FOR THE MONTH…………….+92 [+3.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….19 DEPARTURE….. +2
TOTAL HEATING UNITS FOR THE MONTH…………269 DEPARTURE…..-98
TOTAL HEATING UNITS FOR THE SEASON………..367 DEPARTURE….-142
TOTAL HEATING UNITS LAST SEASON TO DATE……417 DEPARTURE…..-50
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 0 DEPARTURE…… 0
TOTAL COOLING UNITS FOR THE MONTH…………. 1 DEPARTURE….. -4
TOTAL COOLING UNITS FOR THE SEASON………..831 DEPARTURE….+229
TOTAL COOLING UNITS LAST SEASON TO DATE……682 DEPARTURE….+149
PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official……………18 W AT 10:36 P.M.
AEROVANE (south tower)……18 W AT 10:36 P.M.
ASOS……………………18 W AT 10:30 P.M
DAVIS #1………………..18 W AT 10:29 P.M
DAVIS #2 (south tower)……16 SE AT 10:20 P.M
VECTOR………………….19
RMY…………………….18
MERLIN………………….18
FASTEST MILE FOR YESTERDAY…………………14 W AT 10:36 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 W AT 10:36 P.M
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..14 W AT 11:17 P.M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..13 W AT 11:53 P.M
AVERAGE WIND SPEED AND DIRECTION…………. 6.7 ESE [161 total miles]
ASOS…………………. 7.1
DAVIS #1……………… 7.4 ENE [77 deg.]
DAVIS #2……………… 7.3 ENE [60 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.23 DEPARTURE….+0.07
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE MONTH……….4.55 DEPARTURE….+0.33
ASOS…………..4.52
TOTAL PRECIPITATION FOR THE YEAR……….38.97 DEPARTURE….-4.33
ASOS………….39.73
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
10/01 75/56/66/+9/0.00/591/84 28 SW AERO 28 SW RMY N/A
10/02 63/49/56/-1/0.02/203/29 20 NW AERO 21 NW RMY 20
10/03 65/45/55/-1/0.00/676/97 19 WNW AERO 19 WNW RMY 19
10/04 65/45/55/-1/0.00/659/95 17 ESE AERO 18 ESE RMY 18
10/05 62/52/57/+1/0.00/277/40 17 ENE AERO 17 ENE RMY N/A
10/06 69/51/60/+5/0.00/503/73 28 S AERO 28 S RMY 29
10/07 73/50/62/+7/0.14/316/46 76 W AERO 74 W RMY 70 TSTM
10/08 61/42/52/-2/0.00/676/99 41 W AERO 41 W RMY N/A
10/09 60/37/49/-5/0.00/646/95 25 SSW AERO 28 SSW RMY N/A
10/10 75/52/64/+10/0.00/549/81 40 SSW AERO 40 SSW RMY 38
10/11 64/47/56/+3/0.00/574/85 32 NNW AERO 35 NNW RMY N/A
10/12 52/48/50/-3/T/000/00 28 E AERO 27 E RMY N/A
10/13 57/49/53/0/1.74/000/00 32 E AERO 33 E RMY N/A
10/14 67/47/57/+5/0.00/…/.. 23 WNW AERO 25 WNW RMY N/A
10/15 71/50/61/+9/0.00/…/.. 43 S AERO 46 S RMY 42
10/16 68/48/58/+7/1.00/…/.. 28 S AERO 30 S RMY N/A
10/17 56/39/48/-3/1.24/…/.. 35 WNW AERO 40 WNW RMY 37
10/18 60/46/53/+2/0.00/…/.. 20 ESE AERO 21 ESE RMY 20
10/19 61/46/54/+4/0.00/…/.. 16 ESE AERO 16 SSE RMY N/A
10/20 66/49/58/+8/0.00/…/.. 22 S AERO 22 S RMY 22
10/21 71/56/64/+14/0.06/…/.. 26 SSW AERO 26 SSW RMY 26
10/22 70/54/62/+13/0.00/…/.. 18 SSW AERO 17 SSW RMY N/A
10/23 68/52/60/+11/0.00/…/.. 18 ESE AERO 18 ESE RMY 18
10/24 68/42/55/+6/0.00/…/.. 32 NNW AERO 32 NNW RMY 32
10/25 50/40/45/-4/0.00/…/.. 19 NNW AERO 19 NNW RMY N/A
10/26 52/43/48/0/0.02/…/.. 20 E AERO 18 ESE RMY 20
10/27 52/43/48/0/0.00/…/.. 22 NNW AERO 22 NNW RMY N/A
10/28 49/42/46/-2/…./…/.. 18 W AERO 18 W RMY 18
10/29 The low since midnight is 43F, the daily normal low is 39F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
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
RECORDS FOR OCTOBER 30
HIGH 75F IN 1946,1989
LOW 21F IN 1928
PRECIP 1.85 INCHES IN 1917
SNOWFALL 2.0 INCHES IN 2011
PEAK GUST 66 NW IN 1963
TODAY’S REPORT PREPARED BY: Benjamin Turner
