Wednesday, June 9, 2021

| June 9, 2021 | Reply

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

WEDNESDAY, JUNE 9, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0406E
SUNSET:  1920E

SLIGHTLY LESS HOT WITH SOME CUMULUS BUILDING IN THE
AFTERNOON….

Today was hot and humid especially in the morning hours,
where the humidity was 97% with a temperature of 72F at
7 A.M. Visibility cleared up a little bit, giving us a
maximum visibility of 40 miles so far today. Wind is light
and northwesterly with a max gust of 19 mph.

We observed some building cumulus to the north and west
at the 1 P.M. observation, but not to the extent that
we had yesterday at the same time.

The high so far today is 87F, which is 14 degrees above the
normal high of 73F. The low since midnight is 70F, which is
15 degrees above the daily normal low of 55F.


PRELIMINARY STATS FOR MAY 2021

TEMPERATURE, Deg. F
Avg. Max. 68.1 [+1.8]
Avg. Min. 48.0 [+0.2]
Mean      58.1 [+1.0]
24-hour corrected mean: 57.7
Max. for month: 87F on the 22nd, 23rd
Min. for month: 38F on the 1st

HEATING DEGREE DAYS
Total heating units:    237 [-31]
Total for the season:  5578 [-725]
Total for last season: 5812

PRECIPITATION, Inches
Total: 5.60 [+1.49]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed:   11.4 mph
Prevailing wind direction:   WNW [16%]
Peak gust and direction:     44 ENE on the 29th

SUNSHINE:
Campbell-Stokes card minutes: 14478 minutes of a possible 26226 or 55%
Astronomical total minutes: 14977 minutes of a possible 27188 or 55%

 

Today’s Observations:

7 A.M.
Weather: Broken cumulus, altocumulus and cirrus
Temperature: 72F; Dew Point: 71F; Relative Humidity: 97%
Wind: W @ 7 kts
Sea-level pressure: 29.94 in. Hg; falling unsteadily
Visibility: 15 miles, thin fog
6-hr Max temp: 72F
6-hr Min temp: 70F
24-hr Precip: 0.08 ins.
BHO SA 1155 40 BKN 100 BKN 250 BKN 15 140/72/71/2807/994/ THN F ALQDS/
8/881 70008 56005 10072 20070

10 A.M.
Weather: Broken cumulus, altocumulus and cirrus
Temperature: 81F; Dew Point: 72F; Relative Humidity: 74%
Wind: NW @ 9G15 kts
Sea-level pressure: 29.96 in Hg; falling then rising
Visibility: 40 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 40 BKN 100 BKN 250 BKN 40 146/81/72/3109G15/996/
8/881 51006

1 P.M.
Weather: Broken cumulus congestus and cirrocumulus
Temperature: 84F, Dew point: 71F; Relative Humidity: 66%
Wind: NW @ 6 kts, light
Sea-level pressure: 29.95 in Hg; falling steadily
Visibility: 35 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 72F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 BKN 250 BKN 35 143/84/71/3106/995/ HAZY WND LGT/
8/209 58003 10087 20072

SUMMARY FOR TUESDAY, JUNE 8, 2021

TEMPERATURE (DEGREES F)
MAX…….92     NORMAL…..73
MIN…….69     NORMAL…..55
MEAN……81     NORMAL…..64

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL…….+17
TOTAL DEPARTURE FOR THE MONTH……………….+77 [+9.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 0  DEPARTURE…….-4
TOTAL HEATING UNITS FOR THE MONTH…………… 3  DEPARTURE……-30
TOTAL HEATING UNITS FOR THE SEASON…………5581  DEPARTURE…..-755
TOTAL HEATING UNITS LAST SEASON TO DATE…….5835  DEPARTURE…..-254

COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………16  DEPARTURE……+14
TOTAL COOLING UNITS FOR THE MONTH……………63  DEPARTURE……+47
TOTAL COOLING UNITS FOR THE SEASON…………..92  DEPARTURE……+52
TOTAL COOLING UNITS LAST SEASON TO DATE………59  DEPARTURE……+33

PEAK WIND GUST (MPH):
                     420C/Official…………..24 WSW @  5:06 P.M.
                     AEROVANE (south tower)…..25 WSW @  5:07 P.M.
                     ASOS…………………..25 SW  @  5:06 P.M.
                     DAVIS #1……………….26 SW  @  5:05 P.M.
                     DAVIS #2 (south tower)…..26 SW  @  5:05 P.M.
                     RMY……………………27     @  5:04 P.M.
                     VECTOR…………………32     @  5:05 P.M.
                     MERLIN…………………28

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 WSW @  5:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 SW  @  5:07 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 WSW @  5:05 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 SW  @  5:06 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..17 WSW @  5:04 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..20     @  5:04 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……9.5 WSW [228 total miles]
                     ASOS…………………9.4
                     DAVIS #1…………….10.0 WSW
                     DAVIS #2…………….10.0 WSW
                     RMY………………….9.4 WSW
                     VECTOR……………….9.8


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.08  DEPARTURE….-0.09
                             ASOS………….0.05
TOTAL PRECIPITATION FOR THE MONTH………….0.11  DEPARTURE….-1.22
                             ASOS………….0.08
TOTAL PRECIPITATION FOR THE YEAR………….20.77  DEPARTURE….-3.22
                              ASOS………..20.94


PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

05/01   62/38/50/-3/0.06/0.0/659/78       31 WNW  AERO 35 WNW  RMY 40
05/02   76/48/62/+9/0.01/0.0/220/26       41 SW   AERO 41 SW   RMY 46
05/03   67/48/58/+5/0.07/0.0/400/47       21 E    AERO 20 E    RMY 20
05/04   50/44/47/-7/0.78/0.0/000/00       36 NNE  AERO 32 NNE  RMY 37
05/05   48/44/46/-8/0.47/0.0/000/00       18 ESE  AERO 14 ESE  RMY 17
05/06   64/45/55/+1/0.00/0.0/780/91       33 NW   AERO 38 NNW  RMY 39
05/07   61/43/52/-3/0.00/0.0/516/60       28 ESE  AERO 22 ESE  RMY 26
05/08   54/40/47/-8/0.00/0.0/069/08       24 SSW  AERO 23 SSW  RMY 25
05/09   66/42/54/-1/T/0.0/579/67          30 SW   AERO 29 SW   RMY 34
05/10   60/45/53/-2/0.39/0.0/078/09       21 W    AERO 20 W    RMY 20
05/11   63/45/54/-2/0.00/0.0/764/88       38 WNW  AERO 41 WNW  RMY 41
05/12   65/41/53/-3/0.00/0.0/722/83       28 NW   AERO M  M    RMY 31
05/13   69/45/57/+1/0.00/0.0/759/87       22 WNW  AERO 21 WNW  RMY 21
05/14   76/49/63/+8/0.00/0.0/725/83       23 WNW  AERO 23 WNW  RMY 25
05/15   75/55/65/+8/0.01/0.0/569/65       24 SSE  AERO 26 SSE  RMY 26
05/16   78/54/66/+9/0.01/0.0/483/55       36 W    AERO 37 W    RMY 42
05/17   77/52/65/+8/0.00/0.0/722/82       20 SSW  AERO 21 SSW  RMY 21
05/18   81/54/68/+10/T/0.0/600/68         32 W    AERO 30 W    RMY 32
05/19   75/55/65/+7/0.00/0.0/778/88       25 NE   AERO 23 NNE  RMY 27
05/20   75/52/64/+6/0.00/0.0/842/95       18 ESE  AERO 18 ESE  RMY 19
05/21   78/50/64/+5/T/0.0/524/59          23 S    AERO 22 S    RMY 26
05/22   87/56/72/+13/T/0.0/285/32         25 WNW  AERO 21 WNW  RMY 24
05/23   87/58/73/+14/T/0.0/687/77         38 NNW  AERO 37 NNW  RMY 40
05/24   70/49/60/+1/0.00/0.0/839/94       30 S    AERO 35 S    RMY 33
05/25   75/47/61/+1/0.00/0.0/761/85       31 SW   AERO 35 SW   RMY 34
05/26   86/57/72/+12/0.21/0.0/736/82      30 S    AERO 36 S    RMY 35 TSTM
05/27   79/57/68/+8/0.02/0.0/691/77       25 N    AERO 25 WNW  RMY 27
05/28   58/43/51/-10/1.00/0.0/162/18      28 ENE  AERO 32 ENE  RMY 27
05/29   46/42/44/-17/1.50/0.0/000/00      44 ENE  AERO 47 ENE  RMY 50
05/30   46/45/46/-15/0.87/0.0/000/00      37 NE   AERO 40 NE   RMY 40
05/31   57/46/52/-9/0.20/0.0/027/03       22 NNE  AERO 25 WNW  RMY 25

RECORDS FOR THE MONTH:

Low maximum on the 30th of 46F, beating the old record of
51F set in 1996


PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

06/01   74/50/62/0/0.00/…/..            20 WSW  AERO 24 WSW  RMY 22
06/02   80/55/68/+6/0.00/…/..           28 S    AERO 25 S    RMY 28
06/03   73/56/65/+3/0.01/…/..           29 SSW  AERO 29 SSW  RMY 29
06/04   77/61/69/+6/0.02/…/..           23 SW   AERO 25 WSW  RMY 25 TSTM
06/05   87/60/74/+11/0.00/…/..          32 SSW  AERO 37 SSW  RMY 35
06/06   91/69/80/+17/0.00/…/..          30 WSW  AERO 31 WSW  RMY 32
06/07   92/69/81/+17/0.00/…/..          31 SSW  AERO 35 SSW  RMY 34
06/08   92/69/81/+17/…./…/..          24 WSW  AERO 25 WSW  RMY 27

06/09   The low since midnight is 70F, the daily normal low is 55F
 
RECORDS FOR THE MONTH:

06/07: NEW RECORD DAILY HIGH MINIMUM TEMPERATURE OF 69F,
SURPASSES PREVIOUS RECORD OF 66F SET IN 1922 AND 1953  

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

RECORDS FOR JUNE 9
HIGH 94F IN 2008
LOW 40F IN 1980
PRECIP 2.08 INCHES IN 1931
PEAK GUST 67 MPH NW IN 1973

RECORDS FOR JUNE 10
HIGH 98F IN 2008
LOW 42F IN 1913, 1920
PRECIP 2.51 INCHES IN 1931
PEAK GUST 60e MPH NW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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