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

TUESDAY, AUGUST 3, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0439E
SUNSET:  1901E

CLOUDS INCREASING, BUT STILL EXCELLENT VISIBILITY AND COMFORTABLE
AIR....

Clouds have been on the increase during the day as a frontal
system lurks off to the southeast of the region. Despite all the
cloud cover, which has been mainly of the high variety, some
dim sunshine has been enough the warm temperatures into the
mid-upper 70s.

Visibility has been excellent yet again today topping out around
80 miles this morning, but slipping back to around 65 miles this
afternoon. Definitely a treat for this time of year.

The visibility has been aided by the relatively low dew points
for this time of year. Readings have been hanging in the mid
50s most of the day, however an upward trend has start as we
approach late afternoon.

With all the talk about how wet July was, the monthly total
ended up being 11.59", which was only 0.09" away from breaking
the all-time wettest July on record. Instead we have to settle
with July 2021 coming in at 2nd place on the rankings.

BHO Wettest Julys, inches (1885-2021)
1) 11.67 in 1938
2) 11.59 in 2021
3) 10.68 in 1988
4) 10.43 in 1921
5) 9.52 in 1915
6) 8.47 in 1889
7) 7.62 in 2009
8) 7.55 in 1916

The high so far today is 76F, 6 degrees below the daily normal
maximum of 82F. The low so far today is 60F, which is 4 degrees
below the daily normal minimum of 64F.

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

Today's Observations:

7 A.M.
Weather: Broken cirrostratus, thin broken cirrus
Temperature: 65F; Dew Point: 56F; Relative Humidity: 72%
Wind: NNE @ 4 kts, wind light
Sea-level pressure: 30.13 in. Hg; rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 60F
24-hr Precip: 0.00 ins.
BHO SA 1155 E220 BKN 250 -BKN 80 203/65/56/0204/013/ WND LGT/
8/006 51009 10065 20060

10 A.M.
Weather: Overcast cirrostratus, few breaks in overcast distant W-N-NNE
Temperature: 72F; Dew Point: 56F; Relative Humidity: 57%
Wind: Calm, wind light and variable
Sea-level pressure: 30.16 in Hg; rising, then more rapidly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E220 OVC 80 212/72/56/0000/016/ FEW BINOVC DSNT W-N-NNE
SUN DMLY VSBL WND L/V/ 8/007 53009


1 P.M.
Weather: Overcast cirrostratus, few breaks in overcast distant N-NNE,
few stratocumulus/cumulus all quadrants
Temperature: 75F, Dew point: 57F; Relative Humidity: 53%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 30.13 in Hg; falling, then more rapidly
Visibility: 65 miles
6-hr Max temp: 76F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 E200 OVC 65 203/75/57/2006/013/ FEW BINOVC DSNT N-NNE
FEW SC/CU ALQDS SUN DMLY VSBL WND LGT/ 8/807 58009 10076 20065


SUMMARY FOR MONDAY, AUGUST 2, 2021

TEMPERATURE (DEGREES F)
MAX.......78     NORMAL.....82
MIN.......61     NORMAL.....64
MEAN......70     NORMAL.....73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...........-3
TOTAL DEPARTURE FOR THE MONTH.......................-8 [-4.2 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.........0
TOTAL HEATING UNITS FOR THE SEASON..............28  DEPARTURE.......+21
TOTAL HEATING UNITS LAST SEASON TO DATE..........1  DEPARTURE.......+27

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY................5  DEPARTURE........-3
TOTAL COOLING UNITS FOR THE MONTH................8  DEPARTURE....... -8
TOTAL COOLING UNITS FOR THE SEASON.............387  DEPARTURE.......-16
TOTAL COOLING UNITS LAST SEASON TO DATE........511  DEPARTURE......-124

PEAK WIND GUST (MPH):
                     Official...................28 WNW @  2:00 P.M.
                     AEROVANE (south tower).....28 WNW @  2:04 P.M.
                     VECTOR #2 (south tower)....30     @  2:00 P.M.
                     DAVIS #2 (south tower).....25 NW  @  2:01 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..................19 WNW @  2:07 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............20     @  2:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............20 NW  @  2:02 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...... 8.7 WNW [208 total miles]
                     VECTOR #2................ 9.5
                     DAVIS #2................. 9.3 NW
                     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............TRACE  DEPARTURE....-0.26
TOTAL PRECIPITATION FOR THE YEAR.............34.97  DEPARTURE....+4.27


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/.../..           55 NW  AERO 58 NW   RMY N/A TSTM
07/28   72/61/67/-6/0.06/.../..           18 NNE AERO 18 NNE  RMY N/A
07/29   77/61/69/-4/0.19/.../...          39 S   AERO 40 S    RMY N/A
07/30   78/58/68/-5/0.01/.../..           31 NW  AERO 31 NW   RMY N/A
07/31   74/52/63/-10/0.00/.../..          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/-3/0.00/.../..          28 WNW AERO 28 WNW  RMY N/A

08/03 The low since midnight is 60F, 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 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]

RECORDS FOR AUGUST 4
HIGH 95F IN 1928
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 67 MPH SSE IN 2020 [POST-TROPICAL STORM ISAIAS]

TODAY'S REPORT PREPARED BY: Matt Douglas