Monday, June 7, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JUNE 7, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0408E
SUNSET: 1919E
ANOTHER HOT AND HUMID DAY ON TOP BLUE HILL, BUT STILL
NO OFFICIAL HEAT WAVE UP HERE, YET….
The hazy, hot, and humid conditions continue today with
readings getting into the low 90s for the second day in
row. Unlike many other nearby stations, we failed to
reach 90 on Saturday, as such we have not officially
reached the 3 consecutive days required to be called a
heat wave. Tomorrow will likely seal the deal!
We have likely set a new record high minimum for today’s
date. The low so far today is 69F, the previous record
was 66F set back in 1922 and 1953.
The humidity has definitely been more noticeable today
with the dew point reaching 70F for a time this morning,
and again rising to the 70F degree mark by mid afternoon.
Mixing along with a WSW wind for a time early this
afternoon allowed the dew point to drop to the low 60s.
The wind has now shifted to the S and SSW, thus the dew
point has risen once again.
Winds started off light this morning, but have increased
as we progressed through mid and late morning with gusts
reaching upwards of 30 mph.
Visibility has been limited all day due to haziness, only
averaging 20-25 miles.
The record high for today is 93F set in 1999, however we
have fallen short of that mark today.
The high so far today is 92F, which is 19 degrees above the
normal high of 73F. The low since midnight is 69F, which is
14 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: Clear, few cirrus distant NE-E
Temperature: 75F; Dew Point: 65F; Relative Humidity: 72%
Wind: SW @ 7 kts
Sea-level pressure: 30.09 in. Hg; rising, then more rapidly
Visibility: 20 miles, hazy
6-hr Max temp: 75F
6-hr Min temp: 69F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 20 188/75/65/2307/009/ FEW CI DSNT NE-E HAZY/
8/001 53010 10075 20069
10 A.M.
Weather: Clear, few cumulus SW-NW-N, few altocumulus
distant E-SE, few cirrus distant N-NE
Temperature: 86F; Dew Point: 70F; Relative Humidity: 59%
Wind: SW @ 7 kts
Sea-level pressure: 30.09 in Hg; rising, then falling
Visibility: 20 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 20 189/86/70/2307/009/ FEW CU SW-NW-N
FEW AC DSNT E-SE FEW CI DSNT N-NE HAZY/ 8/231 50001
1 P.M.
Weather: Scattered cumulus
Temperature: 91F, Dew point: 63F; Relative Humidity: 40%
Wind: WSW @ 14G21 kts
Sea-level pressure: 30.04 in Hg; falling, then more rapidly
Visibility: 25 miles, hazy
6-hr Max temp: 91F
6-hr Min temp: 75F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 25 172/91/63/2414G21/004/ HAZY/
8/200 58017 10091 20075
SUMMARY FOR SUNDAY, JUNE 6, 2021
TEMPERATURE (DEGREES F)
MAX…….91 NORMAL…..72
MIN…….69 NORMAL…..54
MEAN……80 NORMAL…..63
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL…….+17
TOTAL DEPARTURE FOR THE MONTH……………….+43 [+7.0 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……-19
TOTAL HEATING UNITS FOR THE SEASON…………5581 DEPARTURE…..-744
TOTAL HEATING UNITS LAST SEASON TO DATE…….5830 DEPARTURE…..-249
COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………15 DEPARTURE……+13
TOTAL COOLING UNITS FOR THE MONTH……………31 DEPARTURE……+20
TOTAL COOLING UNITS FOR THE SEASON…………..60 DEPARTURE……+25
TOTAL COOLING UNITS LAST SEASON TO DATE………59 DEPARTURE…….+1
PEAK WIND GUST (MPH):
420C/Official…………..30 WSW @ 1:21 P.M.
AEROVANE (south tower)…..31 WSW @ 1:17 P.M.
ASOS…………………..28 WSW @ 1:17 P.M.
DAVIS #1……………….30 W @ 1:17 P.M.
DAVIS #2 (south tower)…..29 W @ 1:17 P.M.
RMY……………………32 @ 1:19 P.M.
VECTOR…………………31 @ 1:20 P.M.
MERLIN…………………28
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WSW @ 1:21 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 W @ 12:50 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………24 W @ 12:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 W @ 1:37 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..21 W @ 1:19 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..22 @ 12:47 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……12.3 WSW [296 total miles] ASOS…………………12.5
DAVIS #1……………..12.8 W
DAVIS #2……………..12.6 WSW
RMY………………….11.9 WSW
VECTOR……………….12.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.16
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….0.03 DEPARTURE….-0.96
ASOS………….0.03
TOTAL PRECIPITATION FOR THE YEAR………….20.69 DEPARTURE….-2.96
ASOS………..20.89
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 The low since midnight is 69F, the daily normal low is 55F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982
RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.11 INS IN 1923
PEAK GUST 86e MPH WNW IN 1946 [Record for month]
TODAY’S REPORT PREPARED BY: Matt Douglas
