Wednesday, October 28, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, OCTOBER 28, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
RAINY, FOGGY, AND COLD ATOP GREAT BLUE HILL….
Fog and some light rainfall have been the main features
today, amounting to 0.29 inches since it started early
this morning. We were able to see 3 miles at the 7 A.M.
observation, but could see only a 1/16th mile by 1 P.M.
Wind is easterly, only reaching 14 mph so far today.
Temperatures have been on the cool side only reaching the
upper 40’s this afternoon.
The high so far today is 48F, this is 9 degrees below the
daily normal maximum of 57F. The low since midnight is 41F,
which is 2 degrees above the daily normal minimum of 39F.
Today’s Observations:
7 A.M.
Weather: Overcast stratus, light rain
Temperature: 42F; Dew Point: 42F; Relative Humidity: 100%
Wind: E at 7 kts
Sea-level pressure: 30.13 ins. Hg: falling steadily
Visibility: 3 miles, fog
6-hr Max temp: 42F
6-hr Min temp: 42F
24-hr Precip: 0.10 ins.
BHO SA 1155 30 OVC 3R-F 202/42/42/1007/013/ R-CTD/ 8////
70010 58010 10042 20042
10 A.M.
Weather: Fog, light rain
Temperature: 44F; Dew Point: 44F; Relative Humidity: 100%
Wind: E at 7 kts
Sea-level pressure: 30.08 ins. Hg: fallng steadily
Visibility: 1/2th mile, fog
3-hr Precip: 0.09 ins.
BHO SA 1455 X W3 1/2R-F 187/44/44/1007/008/ R-CTD/ 8////
6009/ 58015
1 P.M.
Weather: Fog, light rain
Temperature: 47F; Dew Point: 47F; Relative Humidity: 100%
Wind: ESE at 8 kts
Sea-level pressure: 30.00 ins. Hg: falling, then more rapidly
Visibility: 1/16th mile, fog
6-hr Max temp: 48F
6-hr Min temp: 41F
6-hr Precip: 0.19 ins.
BHO SA 1755 X W3 1/16R-F 157/47/47/1108/000/ R-CTD/ 8//// 6019/
58030 10048 20041
SUMMARY FOR TUESDAY, OCTOBER 27, 2020
TEMPERATURE (DEGREES F)
MAX…..52 NORMAL…..57
MIN…..43 NORMAL…..39
MEAN….48 NORMAL…..48
DEPARTURE FROM 30-YEAR NORMAL……………. 0
TOTAL DEPARTURE FOR THE MONTH…………….+94 [+3.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….17 DEPARTURE….. 0
TOTAL HEATING UNITS FOR THE MONTH…………250 DEPARTURE….-100
TOTAL HEATING UNITS FOR THE SEASON………..348 DEPARTURE….-144
TOTAL HEATING UNITS LAST SEASON TO DATE……402 DEPARTURE…..-55
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……………22 NNW AT 7:58 A.M.
AEROVANE (south tower)……22 NNW AT 7:58 A.M.
ASOS……………………22 N AT 6:48 A.M
DAVIS #1………………..21 N AT 6:48 A.M
DAVIS #2 (south tower)……21 N AT 6:20 A.M
VECTOR………………….23
RMY…………………….N/A
MERLIN………………….N/A
FASTEST MILE FOR YESTERDAY…………………15 N AT 6:18 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 N AT 7:00 A.M
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..17 N AT 6:50 A.M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..15 N AT 6:20 A.M
AVERAGE WIND SPEED AND DIRECTION…………. 7.8 NNW [186 total miles]
ASOS…………………. 8.5
DAVIS #1……………… 8.2 NNW [332 deg.]
DAVIS #2……………… 8.2 NNW [335 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.10 DEPARTURE….-0.05
ASOS…………..0.09
TOTAL PRECIPITATION FOR THE MONTH……….4.32 DEPARTURE….+0.26
ASOS…………..4.29
TOTAL PRECIPITATION FOR THE YEAR……….38.74 DEPARTURE….-4.40
ASOS………….39.50
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 The low since midnight is 42F, 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 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: Benjamin Turner
