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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 2, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
LIGHTNING SPOTTED FROM BHO AT 1:00PM EST
Distant showers and lightning southwest of the observatory
were spotted during the 1:00PM EST observation. The storm
appeared to be moving northeast with no precip. measured
as of 1:00PM. Temperatures had reached 86F and dew points
were in the upper 60s before falling with the approaching
storm. Wind speeds increased to a peak gust of 21 MPH
out of the south after a morning of light winds.
The morning hours saw thick fog in the region with the
increase in moisture. Visibility slightly increased as fog
dissipated, but hazy conditions were still in place to limit
visibility to 20-30 miles.
PRELIMINARY STATS FOR JULY 2017
TEMPERATURE, Deg. F
Avg. Max. 79.8 [-1.0]
Avg. Min. 62.3 [-0.6]
Mean 71.1 [-0.8]
24-hour corrected mean: 70.2
Max. for month: 90F on 19th, 20th, and 21st
Min. for month: 54F on 24th and 25th
HEATING DEGREE DAYS
Total heating units: 24 [+15]
Total for the season: 24 [+15]
Total for last season: 10
COOLING DEGREE DAYS
Total cooling units: 220 [-2]
Total for the season: 421 [+70]
Total for last season: 474
PRECIPITATION, Inches
Total: 3.39 [-0.63]
Greatest in 24 hrs: 1.76 in on 24th-25th
WIND, mph
Avg. uncorrected wind speed: 9.4
Avg. corrected wind speed: 10.0
Prevailing wind direction: W at 13%
Peak gust and direction: 38 NE on 24th
SUNSHINE:
Campbell-Stokes card minutes: 15,564 minutes of possible 26,268 or 58%
Astronomical total minutes: 16,175 minutes of possible 27,735 or 58%
Today’s Observations:
7 A.M.
Weather: Dissipating fog, few stratus fractus NE-WNW, broken cirrus
Temperature: 71F; Dew Point: 68F; Wind: S at 4 kts,
Wind speed: Light
Sea-level pressure: 30.08 ins. Hg, rising, then more quickly
Visibility: 5 miles, except 10 miles NNW-NNE
6-hr Max temp: 71F
6-hr Min temp: 67F
24-hr precip: Trace
BHO SA 1155 E250 BKN 5F 187/71/68/1904/008/ FEW STFRA NE-WNW
VSBY NNW-NNE 10 FG DSPTNG WND LGT/ 8/701 53012 10071 20067
10 A.M.
Weather: Few cumulus NNE, scattered altostratus, broken cirrostratus
Temperature: 78F; Dew Point: 69F; Wind: S at 4 kts,
Wind speed: Light
Sea-level pressure: 30.10 ins. Hg, rising then steady
Visibility: 20 miles, hazy
BHO SA 1455 200 SCT E250 BKN 20 192/78/69/1804/010/ FEW CU NNE HAZY
WND LGT/ 8/116 51005
1 P.M.
Weather: Scattered cumulus, towering cumulus W-SSW, scattered altostratus,
broken cirrostratus, distant showers and distant lightning SW
Temperature: 83F; Dew Point: 65F; Wind: S at 7 kts
Sea-level pressure: 30.07 ins. Hg, steady then falling
Visibility: 30 miles, except 10 miles SW, distant haze in all directions
6-hr Max temp: 86F
6-hr Min temp: 70F
BHO SA 1755 44 SCT 100 SCT E200 BKN 30 182/83/65/1707/007/ TCU W-SSW
VSBY SW 10 DSNT HZ ALQDS DSNT SHWRS SW LTG DSNT SW/ 8/216 58010 10086 20070
SUMMARY FOR TUESDAY, AUGUST 1, 2017
TEMPERATURE (DEGREES F)
MAX…..87 NORMAL…..81
MIN…..65 NORMAL…..63
MEAN….76 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH…………………….+4 [+4 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..11 DEPARTURE……….+4
TOTAL COOLING UNITS FOR THE MONTH…………..11 DEPARTURE……….+4
TOTAL COOLING UNITS FOR THE SEASON…………432 DEPARTURE………+74
TOTAL COOLING UNITS LAST SEASON TO DATE…….479 DEPARTURE………-47
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….16 ESE AT 5:04 P.M.*
AERO……………………16 NNW AT 4:50 A.M.
ASOS……………………17 ESE AT 5:03 P.M.
DAVIS…………………..15 ESE AT 4:34 P.M. RMY 16
FASTEST MILE FOR YESTERDAY…………………11 ESE AT 5:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13 ESE AT 5:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..10 SW AT 12:22 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.2 S
ASOS…………………..7.2
DAVIS………………….5.6 SSW [208 DEG.]
*last of multiple occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….34.76 DEPARTURE……+3.62
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
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
7/1 85/67/76/+6/T/439/48 35 S AERO 37 S RMY 38
7/2 87/69/78/+8/T/785/86 25 W* AERO 28 W* RMY 27
7/3 85/67/76/+5/0.00/894/98 28 W* AERO 29 W RMY 30
7/4 84/62/73/+2/0.00/783/86 17 W AERO 17 W RMY 18
7/5 82/62/72/+1/0.00/855/94 20 S AERO 20 ENE RMY 20
7/6 82/60/71/+0/0.00/664/73 21 SSW AERO 22 SSW RMY 21
7/7 71/60/66/-5/0.63/000/00 28 ENE AERO 28 ENE RMY 27
7/8 84/61/73/+1/0.15/463/51 30 SW* AERO 32 SSW RMY 33 TSTM
7/9 81/60/71/-1/0.00/897/99 26 W AERO 26 W RMY 26
7/10 85/63/74/+2/T/751/83 25 SW AERO 25 S RMY 26
7/11 82/66/74/+2/0.25/253/28 24 S AERO 24 S RMY N/A
7/12 85/68/77/+5/0.43/325/36 23 NE AERO 22 NE RMY 23 TSTM
7/13 68/55/62/-10/0.03/000/00 28 NNE AERO 28 NE RMY 29
7/14 63/56/60/-12/0.02/000/00 15 E AERO 14 E RMY 14
7/15 80/60/70/-2/0.00/296/33 18 S AERO 16 S RMY 18
7/16 87/64/76/+4/0.00/852/95 18 SSE AERO 16 E RMY 17
7/17 84/68/76/+4/0.00/680/76 25 S AERO 25 S* RMY 25
7/18 85/68/77/+5/0.07/500/56 23 S AERO 23 S RMY 23
7/19 90/70/80/+8/0.00/794/89 22 SW AERO 22 SW* RMY 22
7/20 90/70/80/+8/0.00/623/70 21 WSW AERO 22 WSW RMY 21
7/21 90/68/79/+7/0.00/844/95 26 W AERO 26 W RMY 27
7/22 87/70/79/+7/T/266/30 20 WNW AERO 20 WNW RMY N/A
7/23 72/61/67/-5/T/681/77 33 NE AERO 32 NE RMY 33
7/24 62/54/58/-14/1.74/000/00 38 NE AERO 37 ENE RMY 38
7/25 63/54/59/-13/0.03/203/23 23 NNE AERO 21 NNE RMY N/A
7/26 79/55/67/-5/0.00/703/80 21 S* AERO 22 SSE RMY N/A
7/27 72/59/66/-6/0.04/044/05 21 SSW AERO 23 SW RMY 22
7/28 82/64/73/+1/0.00/674/77 16 W AERO 17 N RMY N/A
7/29 67/56/62/-10/0.00/166/19 30 NNE AERO 32 NNE RMY 33
7/30 76/55/66/-6/0.00/871/100 18 SSW*AERO 18 SSW RMY 19
7/31 85/60/73/+1/0.00/869/100 18 SSW AERO 20 SSW RMY 20
DAILY RECORDS FOR JULY
7/24/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 62F,
TIES PREVIOUS RECORD SET IN 1904 AND TIED IN 1964
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
8/1 87/65/76/+4/0.00/…/.. 16 ESE*AERO 16 NNW RMY 16
8/2 Low temp since midnight is 67F; normal low is now 63F
DAILY RECORDS FOR AUGUST
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM – Tied with 8/10/1949]
LOW 50 IN 1929, 1947
PRECIP 1.59 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006
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]
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
