Sunday, July 5, 2020

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

SUNDAY, JULY 5, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

LIMITED VISIBILITY WITH DECENT SUMMER WEATHER
FOLLOWING INDEPENDENCE DAY….

Haze limited visibility to only 25 miles
today, with cloud cover changing from
stratus to cumulus as the day went on.
Wind was very light, only reaching a max
of 13 mph. Wind is almost calm at this
point in time, with the average speed
being less than 10 mph.

The high so far today is 82 degrees,
this is 2 degrees above the daily normal
high of 80F. The low since midnight is 63F,
which is a degree above the daily normal
low of 62F.

PRELIMINARY STATS FOR JUNE 2020

TEMPERATURE, Deg. F
Avg. Max. 78.0 [+3.0] Avg. Min. 59.1 [+2.0] Mean      68.6 [+2.5] 24-hour corrected mean: 67.5
Max. for month: 90F on the 20th
Min. for month: 42F on the 1st

HEATING DEGREE DAYS
Total heating units:     40 [-33] Total for the season:  5852 [-402] Total for last season: 6254

COOLING DEGREE DAYS
Total cooling units:    152  [+47] Total for the season:   184  [+55] Total for last season:  89

PRECIPITATION, Inches
Total: 7.56 [+3.25] 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 [15%] Peak gust and direction:     55 SW on the 6th

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

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 68F; Dew Point: 65F; Relative Humidity: 92%
Wind: SSW at 4 kts, light and variable
Sea-level pressure: 29.96 ins. Hg: rising unsteadily
Visibility: 10 miles, fog
6-hr Max temp: 68F
6-hr Min temp: 63F
24-hr Precip: 0.00 ins.
BHO SA 1155 E10 OVC 10 147/68/65/2204/996/ DSNT FG ALQDS WND
L/V/ 8/6// 52008 10068 20063

10 A.M.
Weather: Broken stratocumulus
Temperature: 73F; Dew Point: 65F; Relative Humidity: 77%
Wind: W at 6 kts, light
Sea-level pressure: 29.96 ins. Hg: falling, then more slowly
Visibility: 25 miles, hazy
3-hr Precip:  0.00 ins.
BHO SA 1455 E10 BKN 25 146/73/65/2706/996/ HAZY WND LGT/
8/800 58001
1 P.M.
Weather: Scattered cumulus and cirrus
Temperature: 80F; Dew Point: 62F; Relative Humidity: 54%
Wind: NE at 3 kts, light and variable
Sea-level pressure: 29.93 ins. Hg: falling, then steady
Visibility: 25 miles, hazy
6-hr Max temp: 82F
6-hr Min temp: 68F
6-hr Precip:  0.00 ins.
BHO SA 1755 10 SCT 250 SCT 25 135/80/62/0403/993/ HAZY WND
L/V/ 8/802 58009 10082 20068

SUMMARY FOR SATURDAY, JULY 4, 2020

TEMPERATURE (DEGREES F)
MAX…..79   NORMAL…..80
MIN…..60   NORMAL…..62
MEAN….70   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL…………….. -1
TOTAL DEPARTURE FOR THE MONTH…………….. -1 [+/- 0.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………………5  DEPARTURE……. -1
TOTAL COOLING UNITS FOR THE MONTH……………..21  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON………….. 205  DEPARTURE…….+52
TOTAL COOLING UNITS LAST SEASON TO DATE……….130  DEPARTURE…….+75

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..16 S   AT  9:27 P.M.
AERO…………………….16 S   AT  9:27 P.M.
ASOS…………………….15 S   AT 10:14 P.M.
DAVIS……………………16 SSE AT 10:28 P.M RMY 16
FASTEST MILE FOR YESTERDAY………………….11 SE  AT  8:30 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….12 SSE AT  8:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………12 SSE AT  8:28 P.M.
AVERAGE WIND SPEED AND DIRECTION……………5.5 N
ASOS……………………5.8
DAVIS…………………..5.9 ENE [71 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.10
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.43
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE YEAR……….27.35  DEPARTURE……-0.05
ASOS………….28.02

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  64/42/53/-9/T/0.0/000/00            28 WNW  AERO 29 WNW RMY 28
06/02  72/45/59/-3/…./0.0/689/76         28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/0.0/400/44            29 W    AERO 28 W   RMY 26
06/04  87/62/75/+12/…./0.0/673/74        26 W    AERO 25 S   RMY N/A
06/05  80/65/73/+10/…./0.0/300/33        28 SSW  AERO 28 SSW RMY N/A TSTM
06/06  86/57/72/+9/…./0.0/301/33         55 SW   AERO 59 SW  RMY 59  TSTM
06/07  68/54/61/-3/0.00/0.0/255/28         24 NW   AERO 24 NW  RMY N/A
06/08  77/51/64/0/0.00/0.0/866/95          25 W    AERO 24 W   RMY 25
06/09  77/60/69/+5/T/0.0/110/12            23 E    AERO 21 E   RMY N/A
06/10  70/58/64/-1/T/0.0/658/72            25 E    AERO 24 E   RMY N/A
06/11  71/64/68/+3/0.62/0.0/165/18         40 S    AERO 40 S   RMY 42
06/12  82/63/73/+8/0.00/0.0/705/77         26 W    AERO 25 W   RMY 27
06/13  71/53/62/-3/0.00/0.0/669/73         21 WNW  AERO 20 WNW RMY N/A
06/14  67/49/58/-8/0.00/0.0/852/93         21 E    AERO 21 ENE RMY 21
06/15  67/53/60/-6/5/0/0.0/705/77          21 NE   AERO 16 ENE RMY 20
06/16  73/54/64/-2/0.00/0.0/889/97         18 E    AERO 18 E   RMY 18
06/17  78/57/68/+1/0.00/0.0/889/97         20 S    AERO 20 S   RMY 20
06/18  86/59/73/+6/0.00/0.0/715/78         22 S    AERO 22 SSW RMY 22
06/19  86/66/76/+9/0.00/0.0/789/86         22 S    AERO 22 S   RMY 21
06/20  90/65/78/+10/0.00/0.0/834/91        22 S    AERO 21 S   RMY 21
06/21  90/66/78/+10/0.83/0.0/514/56        33 ESE  AERO 35 ESE RMY 33  TSTM
06/22  77/65/71/+3/0.00/0.0/…/..         15 E    AERO 17 S   RMY 14
06/23  85/65/75/+7/0.00/0.0/…/..         27 S    AERO 24 S   RMY 26
06/24  84/66/75/+6/0.00/0.0/…/..         25 S    AERO 24 S   RMY 25
06/25  84/63/74/+5/0.00/0.0/…/..         29 W    AERO 29 W   RMY 29
06/26  83/65/74/+5/0.02/0.0/…/..         25 S    AERO 25 S   RMY 27
06/27  82/65/74/+5/0.05/0.0/…/..         21 S    AERO 20 S   RMY 20
06/28  84/62/73/+3/3.27/0.0/…/..         35 W    AERO 33 N   RMY 37  TSTM
06/29  71/61/66/-4/…./0.0/…/..         18 NE   AERO 18 NE  RMY 18  TSTM
06/30  68/62/65/-5/…./…/…/..         14 ENE  AERO 14 ENE RMY 13

Record rainfall on the 28th of 3.27″. Old record 2.09″ in 1938

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/…/…/..          16 E    AERO 14 E   RMY 14
07/02  86/61/74/4/0.00/…/…/..          30 WSW  AERO 25 WSW RMY 33
07/03  73/60/67/-4/0.00/…/…/..         30 NE   AERO 28 NE  RMY 30
07/04  79/60/70/-1/0.00/…/..             16 S    AERO 16 S   RMY 16

07/05 The low since midnight is 63F, the daily normal low is 62F

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

RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 44e N IN 1944

RECORDS FOR JULY 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INS IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999

TODAY’S REPORT PREPARED BY: Benjamin Turner