Tuesday, October 13, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, OCTOBER 13, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
FINALLY, A SOAKING RAINFALL ACROSS THE AREA!…
We’ve longed to say it, and we finally can, today has
been a wet day! Rain started shortly after 2:30 A.M.
this morning and has continued at varying rates through
the day. At times its just a light drizzle while at other
times we get a bit of a downpour. All in all it’s the
perfect kind of rain where it comes somewhat slow and
steady, which allows it to soak in nicely.
Through 1 P.M. this afternoon we’ve measured a total of
0.79″. With some heavier elements having moved through
since the observation, we’ve likely approached, if not
exceeded an inch since then. A good soaking that is
much needed!
It has also been breezy most of the day with a gradually
backing wind from east this morning to northeast this
afternoon. The peak gust for the day thus far is 32 mph.
The high so far today is 57, 4 degrees below the daily
normal of 61F. The low since midnight is 50F, which is
6 degrees above the normal low of 44F.
PRELIMINARY STATS FOR SEPTEMBER 2020
TEMPERATURE, Deg. F
Avg. Max. 73.2 [+1.6]
Avg. Min. 54.9 [+0.3]
Mean 64.1 [+1.0]
24-hour corrected mean: 63.6
Max. for month: 82F on the 8th
Min. for month: 39F on the 22nd
HEATING DEGREE DAYS
Total heating units: 95 [-22]
Total for the season: 98 [-44]
Total for last season: 93
COOLING DEGREE DAYS
Total cooling units: 73 [+13]
Total for the season: 830 [+233]
Total for last season: 680
PRECIPITATION, Inches
Total: 1.61 [-2.45]
Greatest in 24 hrs: 1.02 ins. on 29th-30th
WIND, mph
Avg. uncorrected wind speed: 10.6 mph
Avg. corrected wind speed: 11.1 mph
Prevailing wind direction: S [20%]
Peak gust and direction: 71 S on the 30th
SUNSHINE:
Campbell-Stokes card minutes: 12150 minutes of a possible 21582 or 56%
Astronomical total minutes: 12593 minutes of a possible 22403 or 56%
Today’s Observations:
7 A.M.
Weather: Overcast stratus, light drizzle
Temperature: 53F; Dew Point: 51F; Relative Humidity: 93%
Wind: E at 17 kts, peak wind E 26 kts at 6:01 A.M.
Sea-level pressure: 30.06 ins. Hg: falling, then more slowly
Visibility: 2 miles, fog
6-hr Max temp: 53F
6-hr Min temp: 50F
24-hr Precip: 0.32 ins.
BHO SA 1155 E1 OVC 2L-F 178/53/51/0817/006/ PK WND 0826/01/ 8/6//
56014 6032 70032 10053 20050
10 A.M.
Weather: Sky obscured, vertical visibility 300 feet, light rain
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: ENE at 15G21 kts
Sea-level pressure: 30.01 ins. Hg: falling, then more rapidly
Visibility: 1 mile, fog
3-hr Precip: 0.22 ins.
BHO SA 1455 X W3 1R-F 163/55/55/0715G21/001/ 8//// 58015 6022
1 P.M.
Weather: Sky obscured, vertical visibility 200 feet, light drizzle
Temperature: 56F; Dew Point: 56F; Relative Humidity: 100%
Wind: ENE at 13 kts
Sea-level pressure: 29.89 ins. Hg: falling, then more rapidly
Visibility: 1/2 mile, fog
6-hr Max temp: 57F
6-hr Min temp: 53F
6-hr Precip: 0.47
BHO SA 1755 X W2 1/2L-F 122/56/56/0613/989/ 8//// 58041 6047
10057 20053
SUMMARY FOR MONDAY, OCTOBER 12, 2020
TEMPERATURE (DEGREES F)
MAX…..52 NORMAL…..62
MIN…..48 NORMAL…..44
MEAN….50 NORMAL…..53
DEPARTURE FROM 30-YEAR NORMAL……………. -3
TOTAL DEPARTURE FOR THE MONTH…………….+22 [+1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….15 DEPARTURE….. +3
TOTAL HEATING UNITS FOR THE MONTH………….99 DEPARTURE…..-26
TOTAL HEATING UNITS FOR THE SEASON………..197 DEPARTURE…..-70
TOTAL HEATING UNITS LAST SEASON TO DATE……225 DEPARTURE…..-28
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 0 DEPARTURE…… 0
TOTAL COOLING UNITS FOR THE MONTH…………. 1 DEPARTURE….. -3
TOTAL COOLING UNITS FOR THE SEASON………..831 DEPARTURE….+230
TOTAL COOLING UNITS LAST SEASON TO DATE……682 DEPARTURE….+149
PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official……………28 E AT 4:52 P.M.
AEROVANE………………..27 E AT 9:11 P.M.
ASOS……………………29 ENE AT 4:53 P.M.
DAVIS #1………………..29 E AT 4:52 P.M.
DAVIS #2………………..27 E AT 9:44 A.M.
RMY N/A MERLIN N/A
FASTEST MILE FOR YESTERDAY…………………23 ENE AT 11:44 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 ENE AT 11:45 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..22 E AT 11:45 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..21 ENE AT 11:45 A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.0 ENE (337 total miles)
ASOS………………….13.8
DAVIS #1………………14.7 E [093 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.32 DEPARTURE….+0.17
ASOS…………..0.33
TOTAL PRECIPITATION FOR THE MONTH……….0.48 DEPARTURE….-1.31
ASOS…………..0.45
TOTAL PRECIPITATION FOR THE YEAR……….34.90 DEPARTURE….-5.97
ASOS………….35.66
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
09/01 76/59/68/0/0.00/698/88 22 SSE AERO 21 SE RMY 20
09/02 69/59/64/-4/0.18/102/13 23 SSE AERO 23 SSE RMY 24
09/03 75/66/71/+4/0.04/000/00 22 SSW AERO 21 SSW RMY N/A
09/04 82/62/72/+5/0.00/763/98 26 WNW AERO 26 WNW RMY 25
09/05 76/55/66/-1/0.00/760/98 25 W AERO 25 W RMY 24
09/06 78/58/68/+1/0.00/356/46 24 W AERO 24 W RMY N/A
09/07 79/61/70/+4/0.00/632/82 27 SSE AERO 30 SSE RMY 28
09/08 82/61/72/+6/0.00/545/71 17 S AERO 16 S RMY 17
09/09 80/62/71/+5/0.00/214/28 16 S AERO 15 S RMY 16
09/10 81/69/75/+10/0.28/015/02 21 SSW AERO 21 SSW RMY N/A
09/11 72/55/64/-1/0.01/152/20 25 N AERO 25 N RMY N/A
09/12 68/51/60/-5/0.00/666/88 21 ENE AERO 21 ENE RMY 21
09/13 74/53/64/0/0.00/611/81 26 SSW AERO 26 SSW RMY 26
09/14 74/50/62/-2/0.00/511/68 29 NNW AERO 33 NNW RMY 30
09/15 64/44/54/-10/0.00/583/78 18 S AERO 18 S RMY N/A
09/16 72/49/61/-2/0.00/603/81 31 SSW AERO 31 SSW RMY 31
09/17 76/57/67/+4/0.00/453/61 26 WSW AERO 28 W RMY N/A
09/18 64/48/56/-6/0.00/163/22 28 NE AERO 30 NNW RMY N/A
09/19 59/42/51/-11/0.00/722/98 23 N AERO 23 N RMY N/A
09/20 58/40/49/-13/0.00/602/82 25 NE AERO 25 NE RMY 27
09/21 61/41/51/-10/0.00/694/95 29 NE AERO 27 NE RMY 29
09/22 63/39/51/-10/0.00/022/03 28 NNW AERO 30 NNW RMY 29
09/23 78/50/64/+4/0.00/617/85 31 NW AERO 32 WNW RMY 32
09/24 76/57/67/+7/0.00/347/48 20 SW AERO 18 WSW RMY 19
09/25 77/57/67/+7/0.00/655/91 18 ENE AERO 18 WSW RMY N/A
09/26 77/57/67/+8/0.00/516/72 21 S AERO 21 S RMY 21
09/27 79/64/72/+13/0.01/121/17 24 S AERO 25 S RMY 24
09/28 78/64/71/+13/0.07/199/28 24 SSE AERO 24 S RMY 25
09/29 76/62/69/+11/0.01/234/33 30 S AERO 30 S RMY N/A
09/30 72/56/64/+6/1.01/395/56 71 S AERO 88 S RMY N/A
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/…/.. 28 SW AERO 28 SW RMY N/A
10/02 63/49/56/-1/0.02/…/.. 20 NW AERO 21 NW RMY 20
10/03 65/45/55/-1/0.00/…/.. 19 WNW AERO 19 WNW RMY 19
10/04 65/45/55/-1/0.00/…/.. 17 ESE AERO 18 ESE RMY 18
10/05 62/52/57/+1/0.00/…/.. 17 ENE AERO 17 ENE RMY N/A
10/06 69/51/60/+5/0.00/…/.. 28 S AERO 28 S RMY 29
10/07 73/50/62/+7/0.14/…/.. 76 W AERO 74 W RMY 70 TSTM
10/08 61/42/52/-2/0.00/…/.. 41 W AERO 41 W RMY N/A
10/09 60/37/49/-5/0.00/…/.. 25 SSW AERO 28 SSW RMY N/A
10/10 75/52/64/+10/0.00/…/.. 40 SSW AERO 40 SSW RMY 38
10/11 64/47/56/+3/0.00/…/.. 32 NNW AERO 35 NNW RMY N/A
10/12 52/48/50/-3/T/…/.. 28 E AERO 27 E RMY N/A
10/13 The low since midnight is 50F, the daily normal low is 44F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.92 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950
RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976
TODAY’S REPORT PREPARED BY: Matt Douglas
