Thursday, June 17, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JUNE 17, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0406E
SUNSET: 1924E
ANOTHER NICE DAY WITH EVEN BETTER VISIBILITY AND
A COOL NORTHWESTERLY BREEZE….
Today has been almost clear with some cumulus and
cirrus clouds. Temperatures are on the cooler side,
and the visibility is up to 80 miles.
Humidity is low with a value of 35% being measured at
the 1 P.M. observation.
Wind is northwesterly with frequent gusts near 20 mph.
This is keeping the region cool and dry, yielding
incredible weather for outdoor recreation.
The high so far today is 74F, which is 2 degrees below
the normal high of 76F. The low since midnight is 52F,
which is 6 degrees below the daily normal low of 58F.
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: 2.50 ins. on the 28th-29th
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: Few cirrus
Temperature: 60F; Dew Point: 47F; Relative Humidity: 61%
Wind: WNW @ 7 kts
Sea-level pressure: 29.94 in. Hg; rising steadily
Visibility: 80 miles
6-hr Max temp: 60F
6-hr Min temp: 52F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 138/60/47/2907/994/ FEW CI ALQDS/ 8/002
53009 10060 20052
10 A.M.
Weather: Few cumulus, cirrus
Temperature: 70F; Dew Point: 45F; Relative Humidity: 40%
Wind: W @ 9G15 kts
Sea-level pressure: 29.95 in Hg; rising steadily
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 80 140/70/45/2709G15/995/ FEW CU/CI ALQDS/
8/102 50002
1 P.M.
Weather: Few cumulus and cirrostratus
Temperature: 73F, Dew point: 44F; Relative Humidity: 35%
Wind: NNW @ 8G16 kts
Sea-level pressure: 29.93 in Hg; falling, then steady
Visibility: 75 miles
6-hr Max temp: 74F
6-hr Min temp: 60F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 75 133/73/44/3308G16/993/ FEW CU/CS ALQDS/
8/108 58007 10074 20060
SUMMARY FOR WEDNESDAY, JUNE 16, 2021
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..73
MIN…….56 NORMAL…..56
MEAN……65 NORMAL…..65
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..-1
TOTAL DEPARTURE FOR THE MONTH……………….+84 [+5.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 0 DEPARTURE…….-2
TOTAL HEATING UNITS FOR THE MONTH……………16 DEPARTURE……-40
TOTAL HEATING UNITS FOR THE SEASON…………5594 DEPARTURE…..-765
TOTAL HEATING UNITS LAST SEASON TO DATE…….5851 DEPARTURE…..-258
COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE…….-3
TOTAL COOLING UNITS FOR THE MONTH……………85 DEPARTURE……+45
TOTAL COOLING UNITS FOR THE SEASON………….114 DEPARTURE……+50
TOTAL COOLING UNITS LAST SEASON TO DATE………74 DEPARTURE……+40
PEAK WIND GUST (MPH):
420C/Official…………..27 NNW @ 5:16 A.M.
AEROVANE (south tower)…..31 NNW @ 6:30 A.M.
ASOS…………………..27 NNW @ 4:35 A.M.
VECTOR…………………28 @ 6:04 A.M.
DAVIS #1……………….26 NNW @ 5:15 A.M.
DAVIS #2 (south tower)…..27 NNW @ 6:30 A.M.
RMY……………………27 @ 4:33 A.M.
MERLIN…………………N/A
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 NNW @ 5:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 NNW @ 5:16 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..18 @ 5:15 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 NNW @ 5:15 A.M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 NW @ 1:16 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..17 N @ 5:15 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.8 NW [260 total miles] ASOS…………………10.7
VECTOR……………….10.9
DAVIS #1……………..11.2 NW
DAVIS #2……………..11.3 NW
RMY………………….10.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.15
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….1.30 DEPARTURE….-1.28
ASOS………….1.25
TOTAL PRECIPITATION FOR THE YEAR………….21.96 DEPARTURE….-3.28
ASOS………..22.11
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 74/50/62/0/0.00/425/47 20 WSW AERO 24 WSW RMY 22
06/02 80/55/68/+6/0.00/553/61 28 S AERO 25 S RMY 28
06/03 73/56/65/+3/0.01/073/08 29 SSW AERO 29 SSW RMY 29
06/04 77/61/69/+6/0.02/054/06 23 SW AERO 25 WSW RMY 25 TSTM
06/05 87/60/74/+11/0.00/801/88 32 SSW AERO 37 SSW RMY 35
06/06 91/69/80/+17/0.00/819/90 30 WSW AERO 31 WSW RMY 32
06/07 92/69/81/+17/0.00/519/57 31 SSW AERO 35 SSW RMY 34
06/08 92/69/81/+17/0.06/…/.. 24 WSW AERO 25 WSW RMY 27 TSTM
06/09 88/70/79/+15/0.02/…/.. 21 N AERO 23 NNW RMY 23
06/10 70/53/62/-3/0.00/…/.. 28 NE AERO 28 NE RMY 28
06/11 70/51/61/-4/0.13/…/.. 21 SSE AERO 22 SSE RMY 22
06/12 72/53/63/-2/0.43/…/.. 20 WSW AERO 18 WSW RMY 20
06/13 82/56/69/+4/0.00/…/.. 26 SSW AERO 29 SSW RMY 29
06/14 65/56/61/-5/0.63/…/.. 28 S AERO 30 SSE RMY 29
06/15 77/61/69/+3/T/…/.. 18 NE AERO 20 NE RMY 18 TSTM
06/16 73/56/65/-1/0.00/…/.. 27 NNW AERO 31 NNW RMY 27
06/17 The low since midnight is 52F, the daily normal low is 58F
RECORDS FOR THE MONTH:
High minimum on the 7th of 69F, beating the old 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 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977
RECORDS FOR JUNE 18
HIGH 93F IN 1929, 1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943
TODAY’S REPORT PREPARED BY: Benjamin Turner
