Tuesday, October 5, 2021

| October 5, 2021 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

TUESDAY, OCTOBER 5, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0546E
SUNSET:  1718E

ANOTHER DAMP AND COOL DAY, BUT FINALLY SOME SIGNS OF DRYING….

Low clouds, drizzle and fog have been the theme all morning into
early this afternoon, however some drying is finally taking place
as the fog has lifted and visibility has improved to around 20
miles at the 1 P.M. observation.

Rain and drizzle overnight amounted to an impressive 1.24″ as
measured at 7 A.M. An additional 0.04″ of drizzle was measured
for the 6 hours ending at 1 P.M. Storm total for the event that
started Sunday evening stands at 2.07″!!

The wind has been considerably lighter than it was yesterday only
averaging 7-10mph since this morning. The peak gust for the day
is only 22mph which occurred back around midnight.

The high so far today is 56F, 9 degrees below the normal max of
65F. The low since midnight is 50F, 2 degrees above the normal low of 48F.

PRELIMINARY STATS FOR SEPTEMBER 2021

TEMPERATURE, Deg. F
Avg. Max. 73.2 [+0.5]
Avg. Min. 57.4 [+1.8]
Mean      65.3 [+1.1]
24-hour corrected mean: 64.8
Max. for month: 82F on the 15th
Min. for month: 45F on the 29th

HEATING DEGREE DAYS
Total heating units:     46 [-54]
Total for the season:    74 [+25]
Total for last season:   98

COOLING DEGREE DAYS
Total cooling units:      62 [-12]
Total for the season:    712 [+42]
Total for last season:   830

PRECIPITATION, Inches
Total: 6.64 [+2.58]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed:  10.5 mph
Avg. corrected wind speed:    10.7 mph
Prevailing wind direction:   NW [11%]
Peak gust and direction:     43 ENE on the 2nd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A


Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: N @ 9G16 kts
Sea-level pressure: 1023.8 mb; 30.23 in. Hg: rising, then more rapidly
Visibility: 1/8th mile, fog  
6-hr Max temp: 52F
6-hr Min temp: 50F
24-hr Precip: 1.24 ins.
BHO SA 1155 X W2 1/8L-F 238/52/52/0109G16/023/ 8//// 53016 6016/ 70124
10052 20050

10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: N @ 6 kts
Sea-level pressure: 1025.1 mb; 30.27 in Hg; rising, then more rapidly
Visibility: 1/8th mile, fog
3-hr Precip: 0.02 ins.
BHO SA 1455 X W2 1/8L-F 251/55/55/0106/027/ 8//// 53013 6002/

1 P.M.
Weather: Broken stratus fractus, overcast stratus, few breaks in overcast
distant ENE-E, higher clouds visible distant ENE-E
Temperature: 55F, Dew point: 55F; Relative Humidity: 100%
Wind: NNE @ 7 kts
Sea-level pressure: 1024.8 mb; 30.26 in Hg; rising, then falling
Visibility: 20 miles
6-hr Max temp: 56F
6-hr Min temp: 52F
6-hr Precip: 0.04 ins.
BHO SA 1755 E12 BKN 20 OVC 20 248/55/55/0307/026/ FEW BINOVC DSNT ENE-E
HIER CLDS VSBL DSNT ENE-E L-E15/ 8/6// 58003 6004/ 10056 20052

SUMMARY FOR MONDAY, OCTOBER 4, 2021

TEMPERATURE (DEGREES F)
MAX…….59     NORMAL…..66
MIN…….51     NORMAL…..49
MEAN……55     NORMAL…..57

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………. -2
TOTAL DEPARTURE FOR THE MONTH……………………. -1 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………10  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH……………31  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON………….105  DEPARTURE…….-45
TOTAL HEATING UNITS LAST SEASON TO DATE……..127  DEPARTURE…….-22

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON………….712  DEPARTURE…….+39
TOTAL COOLING UNITS LAST SEASON TO DATE……..831  DEPARTURE……-119

PEAK WIND GUST (MPH):
                     Official……………….30 E   @  7:28 A.M.
                     AEROVANE (south tower)…..30 E   @  7:28 A.M.
                     VECTOR #2 (south tower)….32     @  7:28 A.M.
                     DAVIS #2 (south tower)…..29 E   @  6:41 A.M.
                     ASOS………..OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
                     RMY…………OUT OF SERVICE D/T RENOVATIONS  
                     MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 E    @  6:52 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22      @  6:42 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 E    @  6:42 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……..13.1 ENE [315 total miles]
                     VECTOR #2………………13.5
                     DAVIS #2……………….13.7 E
                     RMY……………..OUT OF SERVICE D/T RENOVATIONS
                     ASOS…………….OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS   

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….1.24  DEPARTURE….+1.08
TOTAL PRECIPITATION FOR THE MONTH………….2.03  DEPARTURE….+1.37
TOTAL PRECIPITATION FOR THE YEAR………….49.01  DEPARTURE….+9.94

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   68/56/62/-7/1.47/000/00          34 NNE AERO 37 NNE RMY N/A    
09/02   71/55/63/-6/2.53/322/41          49 ENE AERO 52 ENE RMY N/A
09/03   72/52/62/-6/0.00/735/94          23 NW  AERO 23 NW  RMY N/A
09/04   76/55/66/-2/0.00/757/97          22 WNW AERO 21 WNW RMY N/A
09/05   72/60/66/-2/0.04/008/01          27 S   AERO 29 S   RMY N/A
09/06   80/61/71/+3/0.00/557/72          24 WNW AERO 25 WNW RMY N/A
09/07   78/57/68/+1/0.00/732/95          23 WSW AERO 22 WSW RMY N/A
09/08   81/61/71/+4/0.00/646/84          43 S   AERO 45 S   RMY N/A
09/09   71/64/68/+1/0.90/000/00          33 S   AERO 36 S   RMY N/A
09/10   74/55/65/-1/0.04/595/78          31 NW  AERO 32 WNW RMY N/A
09/11   75/51/63/-3/0.00/730/96          24 SW  AERO 24 SW  RMY N/A
09/12   79/60/70/+4/0.00/591/78          33 SW  AERO 32 SW  RMY N/A
09/13   77/62/70/+5/0.06/559/74          22 NW  AERO 23 NW  RMY N/A
09/14   75/59/67/+2/0.00/444/59          23 S   AERO 25 S   RMY N/A
09/15   82/65/74/+9/T/539/72             32 SSW AERO 35 SSW RMY N/A
09/16   69/61/65/+1/0.27/037/05          24 ENE AERO 24 ENE RMY N/A TSTM      
09/17   66/60/63/-1/0.02/000/00          22 NE  AERO 23 NE  RMY N/A
09/18   74/62/68/+5/0.04/207/28          17 WNW AERO 18 WNW RMY N/A TSTM
09/19   71/57/64/+1/0.15/619/84          23 NNE AERO 24 NNE RMY N/A
09/20   71/55/63/0/0.00/647/88           20 SE  AERO 20 SE  RMY N/A
09/21   75/55/65/+3/0.00/490/67          19 SSE AERO 20 SSE RMY N/A
09/22   75/65/70/+8/0.02/153/21          30 S   AERO 30 S   RMY N/A
09/23   78/65/72/+10/0.08/298/41         36 SSE AERO 37 SSE RMY N/A
09/24   75/62/69/+8/0.02/007/01          43 SSE AERO 45 SSE RMY N/A
09/25   74/59/67/+6/0.02/303/42          14 N   AERO 14 NNW RMY N/A
09/26   73/54/64/+4/0.57/510/71          33 WNW AERO 32 WNW RMY N/A
09/27   73/52/63/+3/T/…/..             30 SW  AERO 30 SW  RMY N/A
09/28   67/52/60/+1/0.40/…/..          27 SSW AERO 25 SSW RMY N/A TSTM
09/29   63/45/54/-5/0.00/…/..          25 NNW AERO 25 NNW RMY N/A
09/30   60/46/53/-6/0.01/…/..          22 NNW AERO 21 NNW 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   64/44/54/-4/0.00/…/..          20 WNW AERO 20 WNW RMY N/A
10/02   73/47/60/+2/0.00/…/..          24 WSW AERO 23 WSW RMY N/A
10/03   65/55/60/+3/0.09/…/..          19 E   AERO 19 E   RMY N/A
10/04   59/51/55/-2/1.69/…/..          30 E   AERO 30 E   RMY N/A

10/05   The low since midnight is 50F, the daily normal low is 48F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR OCTOBER 5
HIGH 86F IN 2007
LOW 29F IN 1965
PRECIP 3.17 INCHES IN 1962
PEAK GUST 64e MPH S IN 1979

RECORDS FOR OCTOBER 6
HIGH 83F IN 1990, 2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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