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

SUNDAY, AUGUST 8, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0444E
SUNSET:  1855E

COOLER, BUT STILL HUMID UNDER CLOUDY SKIES....

After two days of heat and humidity, today has been much cooler
thanks to an overcast sky. The temperature has spent most of the
day in the upper 70s although we did briefly touch 80F late this
morning. A few light sprinkles have been observed early this
afternoon, but hasn't amounted to anything more than a trace.

The dew point continues on the high side with readings in the
upper 60s to around 70. As such it still feels rather
uncomfortable out there.

Adding to the discomfort is the very light wind today. The wind
has only been averaging around 6 mph since 7 A.M., so there
really isn't much of any ventilation outside.

Visibility has been limited to only 20-30 miles all day thanks to
haziness in the humid air.

The high so far today is 80F, 1 degree below the daily normal
maximum of 81F. The low so far today is 69F, which is 5 degrees
above the daily normal minimum of 64F.

-----------------------------------------------

PRELIMINARY STATS FOR JULY 2021

TEMPERATURE, Deg. F
Avg. Max. 76.3 [-5.4]
Avg. Min. 60.4 [-2.5]
Mean      68.8 [-3.9]
24-hour corrected mean: 67.9
Max. for month: 90F on the 16th
Min. for month: 52F on the 31st

HEATING DEGREE DAYS
Total heating units:     28 [+21]
Total for the season:    28 [+21]
Total for last season:    1

COOLING DEGREE DAYS
Total cooling units:     153 [-95]
Total for the season:    379 [-8]
Total for last season:   487

PRECIPITATION, Inches
Total: 11.59 [+8.12]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed:  9.0 mph
Avg. corrected wind speed:    9.7 mph
Prevailing wind direction:   NE [14%]
Peak gust and direction:     63 NW on the 7th

SUNSHINE:
Campbell-Stokes card minutes: 11574 minutes of a possible 26682 or 43%
Astronomical total minutes: 12005 minutes of a possible 27732 or 43%


-----------------------------------------------

Today's Observations:

7 A.M.
Weather: Overcast cirrostratus, few altocumulus all quadrants
Temperature: 70F; Dew Point: 65F; Relative Humidity: 84%
Wind: W @ 6kts
Sea-level pressure: 30.08 in. Hg; rising, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 71F
6-hr Min temp: 69F
24-hr Precip: 0.00 ins.
BHO SA 1155 E180 OVC 30 187/70/65/2606/008/ FEW AC ALQDS HAZY/
8/077 51012 10071 20069

10 A.M.
Weather: Scattered altocumulus/castellanus, broken cirrostratus,
thin overcast cirrus
Temperature: 77F; Dew Point: 67F; Relative Humidity: 72%
Wind: W  @ 4 kts, wind light
Sea-level pressure: 30.11 in Hg; rising, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 130 SCT E200 BKN 250 -OVC 30 197/77/67/2704/011/
FEW CU ALQDS SUN DMLY VSBL HAZY WND LGT/ 8/288 53010


1 P.M.
Weather: Broken altocumulus/castellanus, overcast cirrostratus,
few cumulus distant WNW-N
Temperature: 78F, Dew point: 70F; Relative Humidity: 77%
Wind: WSW @ 2 kts, wind light
Sea-level pressure: 30.12 in Hg; rising, then falling
Visibility: 20 miles, hazy
6-hr Max temp: 80F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins.
BHO SA 1755 E130 BKN 220 OVC 20 199/78/70/2502/012/ FEW CU DSNT WNW-N
RW-B35E55 HAZY WND LGT/ 8/288 50002 6000/ 10080 20070


SUMMARY FOR SATURDAY, AUGUST 7, 2021

TEMPERATURE (DEGREES F)
MAX.......88     NORMAL.....81
MIN.......66     NORMAL.....64
MEAN......77     NORMAL.....73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...........+4
TOTAL DEPARTURE FOR THE MONTH......................-21 [-3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE.........0
TOTAL HEATING UNITS FOR THE MONTH................0  DEPARTURE........-1
TOTAL HEATING UNITS FOR THE SEASON..............28  DEPARTURE.......+20
TOTAL HEATING UNITS LAST SEASON TO DATE..........1  DEPARTURE.......+27

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY...............12  DEPARTURE........+4
TOTAL COOLING UNITS FOR THE MONTH...............35  DEPARTURE.......-20
TOTAL COOLING UNITS FOR THE SEASON.............414  DEPARTURE.......-28
TOTAL COOLING UNITS LAST SEASON TO DATE........572  DEPARTURE......-158

PEAK WIND GUST (MPH):
                     Official...................23 SW  @  4:29 P.M.
                     AEROVANE (south tower).....23 SW  @  6:30 P.M.
                     VECTOR #2 (south tower)....25     @  4:28 P.M.
                     DAVIS #2 (south tower).....22 SW  @  4:22 P.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..................15 SW  @  4:39 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............16     @  4:22 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............17 SW  @  4:23 P.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......10.0 SW [239 total miles]
                     VECTOR #2................10.8
                     DAVIS #2.................10.8 WSW
                     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.......0.00  DEPARTURE....-0.13
TOTAL PRECIPITATION FOR THE MONTH.............2.39  DEPARTURE....+1.46
TOTAL PRECIPITATION FOR THE YEAR.............37.36  DEPARTURE....+5.99


PRELIMINARY CLIMATE SUMMARY FOR JULY 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


07/01   80/65/73/+2/0.74/155/17           22 W   AERO 20 WSW  RMY 21
07/02   65/55/60/-11/1.49/000/00          37 NE  AERO 36 NE   RMY 39
07/03   56/54/55/-17/1.98/000/00          41 NE  AERO 44 NE   RMY 45 TSTM
07/04   66/54/60/-12/0.16/191/21          26 ENE AERO 23 ENE  RMY 26
07/05   74/53/64/-8/0.01/546/60           26 SSW AERO 28 SSW  RMY 27
07/06   87/66/77/+5/0.26/255/28           37 W   AERO 48 W    RMY 38 TSTM
07/07   88/88/77/+5/0.77/699/77           63 NW  AERO 75 NW   RMY 70 TSTM
07/08   67/59/63/-9/0.38/109/12           46 W   AERO 46 W    RMY 51 TSTM
07/09   73/62/68/-5/3.02/163/18           40 WNW AERO 44 WNW  RMY 43
07/10   71/63/67/-6/0.07/109/12           23 NE  AERO 21 NNE  RMY 22
07/11   81/61/71/-2/T/325/36              21 SW  AERO 19 S    RMY N/A
07/12   67/61/64/-9/1.01/000/00           31 ENE AERO 31 ENE  RMY N/A
07/13   66/60/63/-10/0.02/000/00          19 E   AERO 18 E    RMY N/A
07/14   80/62/71/-2/0.01/216/24           19 S   AERO 18 S    RMY N/A
07/15   88/67/78/+5/0.00/844/94           19 WSW AERO 18 SSW  RMY N/A
07/16   90/70/80/+7/0.04/609/68           36 NNW AERO 39 NNW  RMY N/A TSTM
07/17   78/64/71/-2/0.34/394/44           26 ENE AERO 25 ENE  RMY N/A TSTM
07/18   74/63/69/-4/0.15/000/00           22 NE  AERO 22 NE   RMY N/A TSTM
07/19   71/63/67/-6/0.07/027/03           17 ENE AERO 17 ENE  RMY N/A
07/20   83/64/74/+1/0.00/730/82           23 NW  AERO 23 NW   RMY N/A
07/21   79/62/71/-2/0.16/577/65           26 NNW AERO 23 NNW  RMY N/A TSTM
07/22   79/58/69/-4/T/656/74              20 WNW AERO 20 WNW  RMY N/A
07/23   79/62/71/-2/0.00/708/80           22 S   AERO 21 S    RMY N/A TSTM
07/24   78/59/69/-4/0.00/830/94           19 S   AERO 18 S    RMY N/A
07/25   71/64/68/-5/0.08/009/01           40 SSW AERO 41 SSW  RMY N/A
07/26   87/67/77/+4/0.01/765/87           27 WSW AERO 25 WNW  RMY N/A
07/27   87/65/76/+3/0.56/754/86           55 NW  AERO 58 NW   RMY N/A TSTM
07/28   72/61/67/-6/0.06/446/51           18 NNE AERO 18 NNE  RMY N/A
07/29   77/61/69/-4/0.19/323/37           39 S   AERO 40 S    RMY N/A
07/30   78/58/68/-5/0.01/714/82           31 NW  AERO 31 NW   RMY N/A
07/31   74/52/63/-10/0.00/851/98          24 WNW AERO 25 WNW  RMY N/A

RECORDS FOR JULY:
JULY 2: Record daily precipitation of 1.49",
        Surpasses previous record of 1.42" set in 1986

JULY 3: Record daily precipitation of 1.98",
        Surpasses previous record of 1.36" set in 1985

JULY 7: Record peak gust of 63 MPH,
        Surpasses previous record of 55 MPH set in 1989


PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

08/01   77/58/68/-5/T/.../..             23 SSW AERO 24 SSW RMY N/A
08/02   78/61/70/-3/T/.../..             28 WNW AERO 28 WNW RMY N/A
08/03   76/60/68/-5/0.00/.../..          15 N   AERO 16 N   RMY N/A
08/04   75/61/68/-5/0.71/.../..          21 ESE AERO 21 ESE RMY N/A
08/05   68/61/65/-8/1.68/.../..          28 NE  AERO 28 NE  RMY N/A
08/06   85/62/74/+1/0.00/.../..          19 S   AERO 20 WSW RMY N/A
08/07   88/66/77/+4/0.00/.../..          23 SW  AERO 23 SW  RMY N/A

08/08 The low since midnight is 69F, the daily normal low is 64F


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

RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958

RECORDS FOR AUGUST 9
HIGH 100F IN 1949
LOW 49F IN 1899
PRE 2.65 INS IN 1976
PEAK GUST 90 MPH SW IN 1968

TODAY'S REPORT PREPARED BY: Matt Douglas