Sunday, August 9, 2020

| August 9, 2020 | Reply

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

SUNDAY, AUGUST 9, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY WITH LIMITED VISIBILITY
AND WIND PICKING UP AROUND NOONTIME….

Today was hazy, with the majority of the sky
cover being clouds. Visibility was limited to
35 miles at best, being observed at the 1 P.M.
observation. Wind this morning was light, but
reached 20 mph from the southwest by noontime.
The average wind speed is currently 15 mph.
Humidity has dropped to 50%, and dew points have
held in the mid to upper 60’s. Another great day
for a tour, we are open until 4 P.M. EDT.

We are looking at another dry month so far, with
a rain deficit of almost an inch. The yearly
departure is 2.87 inches below the normal.

The high so far today is 89F, which is 9 degrees
below the daily normal high of 80F. The low since
midnight is 65F, which is 2 degrees above the
daily normal low of 63F.

PRELIMINARY STATS FOR JULY 2020

TEMPERATURE, Deg. F
Avg. Max. 83.5 [+2.7]
Avg. Min. 66.0 [+3.1]
Mean      74.8 [+2.9]
24-hour corrected mean: 73.6
Max. for month: 95F on the 28th
Min. for month: 57F on the 16th

COOLING DEGREE DAYS
Total cooling units:    303  [+81]
Total for the season:   487  [+136]
Total for last season:  411

PRECIPITATION, Inches
Total: 1.72 [-2.30]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 9.1 mph
Avg. corrected wind speed:   9.8 mph
Prevailing wind direction:   S [12%]
Peak gust and direction:     39 S on the 11th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrostratus
Temperature: 70F; Dew Point: 67F; Relative Humidity: 89%
Wind: NE at 7 kts
Sea-level pressure: 30.13 ins. Hg: Rising then falling
Visibility: 20 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 90 SCT 250 BKN 20 204/70/67/2207/013/ FEW CU
ALQDS HAZY/ 8/236 50003 10070 20065

10 A.M.
Weather: Scattered cumulus and altocumulus, broken
cirrus
Temperature: 83F; Dew Point: 68F; Relative Humidity: 61%
Wind: SSW at 7 kts
Sea-level pressure: 30.11 ins. Hg: falling steadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 60 SCT 100 SCT 250 30 198/83/68/2207/011/
HAZY/ 8/152 58006

1 P.M.
Weather: Broken cumulus and altocumulus
Temperature: 87F; Dew Point: 64F; Relative Humidity: 48%
Wind: SSW at 12G16 kts
Sea-level pressure: 30.06 ins. Hg: falling, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 89F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 BKN 100 BKN 35 183/87/64/2012G16/006/ HAZY/
8/250 58015 10089 20070

SUMMARY FOR SATURDAY, AUGUST 8, 2020

TEMPERATURE (DEGREES F)
MAX…..79   NORMAL…..80
MIN…..65   NORMAL…..63
MEAN….72   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL……………..+2
TOTAL DEPARTURE FOR THE MONTH……………..+38 [+4.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………………9  DEPARTURE…….+2
TOTAL COOLING UNITS FOR THE MONTH……………..94  DEPARTURE……+37
TOTAL COOLING UNITS FOR THE SEASON……………581  DEPARTURE…..+173
TOTAL COOLING UNITS LAST SEASON TO DATE……….479  DEPARTURE…..+102

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..20 S   AT  9:28 P.M.
AERO…………………….20 S   AT  9:30 P.M.
ASOS…………………….20 SSW AT  9:32 P.M.
DAVIS……………………19 NE  AT  1:18 P.M
RMY 19  MERLIN 19
FASTEST MILE FOR YESTERDAY………………….15 S   AT  9:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 S   AT  9:32 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 ENE AT  1:18 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.0 E
ASOS……………………7.3
DAVIS…………………..7.2 ESE [121 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.23  DEPARTURE……-0.95
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….29.30  DEPARTURE……-2.87
ASOS………….30.04

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  76/63/70/0/0.00/228/25              16 E    AERO 14 E    RMY 14  TSTM
07/02  86/61/74/+4/0.00/803/88            30 WSW  AERO 25 WSW  RMY 33
07/03  73/60/67/-4/0.00/091/10             30 NE   AERO 28 NE   RMY 30
07/04  79/60/70/-1/0.00/565/62             16 S    AERO 16 S    RMY 16
07/05  83/63/73/+2/0.54/373/41             24 NW   AERO 30 NW   RMY 26  TSTM
07/06  73/60/67/-4/0.00/482/53             20 ENE  AERO 16 NNE  RMY 18
07/07  78/60/69/-2/0.00/454/50             25 S    AERO 25 S    RMY 26
07/08  83/64/74/+2/0.00/227/25             32 SSW  AERO 32 SSW  RMY 32
07/09  89/70/80/+8/0.00/834/92             24 S    AERO 23 S    RMY 22
07/10  83/70/77/+5/0.05/109/12             30 SSE  AERO 32 SSE  RMY N/A
07/11  85/70/78/+6/0.00/614/68             39 S    AERO 39 S    RMY 38
07/12  86/70/78/+6/0.00/830/92             28 WSW  AERO 28 WSW  RMY 29
07/13  82/69/76/+4/0.23/306/34             30 SSE  AERO 31 SSE  RMY 30  TSTM
07/14  78/63/71/-1/0.00/369/41             26 ENE  AERO 25 ENE  RMY 26
07/15  72/59/66/-6/0.00/539/60             21 NE   AERO 21 NE   RMY N/A
07/16  73/57/65/-7/0.00/815/91             21 E    AERO 21 E    RMY 19
07/17  71/57/64/-8/0.19/027/03             24 SSW  AERO 24 SSW  RMY 25
07/18  89/66/78/+6/0.00/822/92             18 W    AERO 17 W    RMY 19
07/19  92/69/81/+9/0.00/722/81             28 S    AERO 28 S    RMY 26
07/20  91/72/82/+10/T/481/54               25 SSW  AERO 25 SSW  RMY N/A
07/21  88/68/78/+6/0.00/799/90             25 W    AERO 25 W    RMY 24
07/22  80/67/74/+2/…./275/31             16 ENE  AERO M  M    RMY 16
07/23  88/68/78/+6/0.48/203/23             31 N    AERO 32 N    RMY 31  TSTM
07/24  81/68/75/+3/0.00/476/54             15 ENE  AERO 15 ENE  RMY 16
07/25  88/67/78/+6/0.00/845/96             18 W    AERO 18 WNW  RMY N/A
07/26  89/70/80/+8/0.00/632/72             27 W    AERO 28 W    RMY 27
07/27  94/72/83/+11/0.00/823/94            23 SW   AERO 25 SW   RMY N/A
07/28  95/74/85/+13/0.01/…/..            28 WSW  AERO 25 WSW  RMY 25
07/29  90/68/79/+7/0.00/…/..             23 SSW  AERO 25 SSW  RMY 24
07/30  88/71/80/+8/0.00/…/..             29 W    AERO 28 W    RMY 29
07/31  84/69/77/+5/0.00/…/..             14 ENE  AERO 14 ENE  RMY 15

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  87/66/77/+5/0.00/…/..             18 S    AERO 21 S    RMY 19
08/02  85/69/77/+5/0.02/…/..             36 S    AERO 37 S    RMY 38
08/03  91/75/83/+11/0.00/…/..            36 WSW  AERO 38 SW   RMY 36
08/04  83/71/77/5/0.21/…/..              67 SSE  AERO 71 S    RMY 70
08/05  90/68/79/+7/0.00/…/..             28 SW   AERO 30 SW   RMY 29
08/06  84/65/75/3/0.00/…/..   20 W    AERO 17 W    RMY 19
08/07  79/65/72/0/T/…/..                 16 NE   AERO 16 NE   RMY N/A
08/08  83/64/74/+2/0.00/…/..             20 S    AERO 20 S    RMY 19

08/09  The low since midnight is 65F, the daily normal low is 63F

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

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

RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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