Thursday, August 6, 2020

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

THURSDAY, AUGUST 6, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY CLOUDY IN THE AFTERNOON HOURS,
WARM YET DRY….

The summit of Blue Hill experienced a nice
summer day, with good visibility and dew
points in the mid to upper 50’s. Wind has
been on the lighter side for most of the
day, only reaching 15 mph from the west
this morning. Visibility was 70 miles on
average, and weather was almost overcast
with a thin cirrostratus layer at the
1 P.M. observation.

The high so far today is 83F, which is 2 degrees
above the daily normal high of 81F. 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 AND WSW [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: 69F; Dew Point: 55F; Relative Humidity: 60%
Wind: NW at 7 kts
Sea-level pressure: 30.13 ins. Hg: Rising steadily
Visibility: 65 miles
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 70 SCT 250 SCT 70 203/69/55/3107/013/ 8/058
51011 10069 20065

10 A.M.
Weather: Broken altocumulus and cirrostratus
Temperature: 78F; Dew Point: 54F; Relative Humidity: 44%
Wind: W at 7 kts
Sea-level pressure: 30.15 ins. Hg: rising steadily
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 120 BKN 250 BKN 70 209/78/54/2707/015/ 8/078
53006

1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 82F; Dew Point: 59F; Relative Humidity: 46%
Wind: W at 5 kts, light
Sea-level pressure: 30.12 ins. Hg: falling steadily
Visibility: 65 miles
6-hr Max temp: 83F
6-hr Min temp: 69F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 250 BKN 65 200/82/59/2605/012/ SUN
DMLY VSBL WND LGT/ 8/108 56009 10083 20069

SUMMARY FOR WEDNESDAY, AUGUST 5, 2020

TEMPERATURE (DEGREES F)
MAX…..90   NORMAL…..81
MIN…..68   NORMAL…..63
MEAN….79   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL……………..+7
TOTAL DEPARTURE FOR THE MONTH……………..+33 [+6.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………..14  DEPARTURE……+7
TOTAL COOLING UNITS FOR THE MONTH……………..68  DEPARTURE……+32
TOTAL COOLING UNITS FOR THE SEASON……………555  DEPARTURE…..+168
TOTAL COOLING UNITS LAST SEASON TO DATE……….453  DEPARTURE…..+102

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 SW  AT  3:02 P.M.
AERO…………………….30 SW  AT  2:36 P.M.
ASOS…………………….29 SW  AT  3:05 P.M.
DAVIS……………………29 SW  AT  3:04 P.M
RMY 29  MERLIN 29
FASTEST MILE FOR YESTERDAY………………….22 SW  AT  3:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 SW  AT  3:06 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 SW  AT  3:06 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.4 SW
ASOS…………………..11.0
DAVIS………………….11.3 WSW [238 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.23  DEPARTURE……-0.52
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….29.30  DEPARTURE……-2.44
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  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 6
HIGH 95F IN 1931
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940

RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975

TODAY’S REPORT PREPARED BY: Benjamin Turner