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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 6, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
SKIES CLEAR AND TRANQUIL AND COOLER WEATHER
MOVES INTO THE REGION
Clear skies and a cooler patterned allowed for an
overnight low 59F this morning just before sunrise.
Extremely sharp and clear visibility was noted at
this morning’s 7:00 AM EST observation at approximately
85 miles in all directions.
By the 1:00 PM EST observation mostly clear skies had
become partly cloudy with scattered cumulus and broken
thin cirrus above. A maximum of 79F was reached by that
time as well.
PRELIMINARY STATS FOR JULY 2015
TEMPERATURE, Deg. F
Avg. Max. 82.2 [+1.4]
Avg. Min. 63.6 [+0.7]
Mean 72.9 [+1.0]
Corrected mean: 72.4
Max. for month: 92 on 29th
Min. for month: 56 on 16th, 17th
HEATING DEGREE DAYS
Total heating units: 1 [-8]
Total for the season: 1 [-8]
Total for last season: 0
COOLING DEGREE DAYS
Total cooling units: 256 [+34]
Total for the season: 394 [+43]
Total for last season: 337
PRECIPITATION, Inches
Total: 3.09 [-0.93]
Greatest in 24 hrs: 2.03, 9-10th
WIND, mph
Avg. uncorrected wind speed: 9.6
Avg. corrected wind speed: 10.2
Prevailing wind direction: S @ 14%
Peak gust and direction: 35 S on the 7th
SUNSHINE:
Campbell-Stokes card minutes: 16452 / 26682 or 62%
Astronomical total minutes: 17101 / 27760 or 62%
Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant E-W
Temperature: 65F; Dew Point: 55F; Wind: WNW at 7 kts
Sea-level pressure: 29.93 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 59F
24-hr precip: 0.00
BHO SA 1155 CLR 80 135/65/55/3007/993/ FEW CI DSNT E-W/
8/001 51007 10065 20059
10 A.M.
Weather: Scattered cirrus, few small cumulus in all directions
Temperature: 75F; Dew Point 54F; Wind: NW at 7 kts
Sea-level pressure: 29.94 ins. Hg, rising, then falling but higher
Visibility: 80 miles
BHO SA 1455 250 SCT 80 140/75/54/3107/994/ FEW SML CU ALQDS/
8/101 50005
1 P.M.
Weather: Scattered cumulus, thin broken cirrus
Temperature: 78F; Dew Point: 54F; Wind: estimated W at 9 kts,
Wind Direction: W varying NW
Sea-level pressure: 29.93 ins. Hg, falling, then rising but lower still
Visibility: 80 miles
6-hr Max temp: 79F
6-hr Min temp: 65F
BHO SA 1755 60 SCT E250 -BKN 80 135/78/54/E2809/993/
WND 26V32/ 8/101 55005 10079 20065
SUMMARY FOR WEDNESDAY, AUGUST 6, 2015
TEMPERATURE (DEGREES F)
MAX…..84 NORMAL…..81
MIN…..64 NORMAL…..63
MEAN….74 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………………+2
TOTAL DEPARTURE FOR THE MONTH…………………..+21 [+3.3 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..56 DEPARTURE………+20
TOTAL COOLING UNITS FOR THE SEASON…………450 DEPARTURE………+63
TOTAL COOLING UNITS LAST SEASON TO DATE…….369 DIFFERENCE……..+81
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 WNW AT 1:34 P.M.
ASOS……………………27 WSW AT 12:28 P.M. .
DAVIS…………………..26 W AT 12:27 P.M. RMY 27
FASTEST MILE FOR YESTERDAY…………………20 W AT 12:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 W AT 2:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 W AT 12:29 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.1 WNW
ASOS………………….10.8
DAVIS………………….9.6 WNW [286 deg.]
* Last of several occurrences…
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………..0.37 DEPARTURE…..-0.38
ASOS……………0.38
TOTAL PRECIPITATION FOR THE YEAR………..27.73 DEPARTURE…..-4.01
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JULY-AUGUST CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
7/1 80/63/72/+2/0.59/466/51 30 SSE RMY 33 TSTM
7/2 78/60/69/-1/0.00/721/79 23 WNW RMY N/A
7/3 79/58/69/-2/0.00/867/95 17 SSW RMY 17
7/4 74/61/68/-3/T/109/12 16 S RMY N/A
7/5 82/58/70/-1/0.00/865/95 20 WSW RMY 20
7/6 85/64/75/+4/0.00/755/83 20 S RMY 21
7/7 84/65/75/+4/0.02/445/49 35 S RMY 40
7/8 87/68/78/+6/T/372/41 23 NE RMY N/A
7/9 73/61/67/-5/0.08/390/43 24 NE RMY 25
7/10 80/59/70/-2/1.95/535/59 18 W RMY N/A TSTM
7/11 84/61/73/+1/0.00/868/96 21 NW RMY 19
7/12 88/67/78/+6/0.00/813/90 20 W RMY 17
7/13 82/66/74/+2/0.00/424/47 21 E RMY 20
7/14 81/64/73/+1/0.04/396/44 25 S RMY 27
7/15 84/61/73/+1/0.14/297/33 24 ENE RMY 26
7/16 72/56/64/-8/0.00/852/95 25 NNE RMY 24
7/17 79/56/68/-4/0.00/708/79 21 S RMY N/A
7/18 76/63/70/-2/0.16/027/03 29 SSW RMY 30 TSTM
7/19 89/68/79/+7/0.01/509/57 25 SSW RMY 27
7/20 90/73/82/+10/0.00/793/89 24 W RMY 26
7/21 87/70/79/+7/T/267/30 24 W RMY 25
7/22 82/64/73/+1/T/727/82 24 WNW RMY 26
7/23 81/62/72/+0/0.00/753/85 22 W RMY 23
7/24 80/60/70/-2/T/663/75 23 N RMY 25
7/25 71/59/65/-7/0.00/265/30 20 ENE RMY N/A
7/26 78/59/69/-3/T/018/02 24 SSE RMY 25 TSTM
7/27 84/67/76/+4/T/378/43 24 S RMY N/A TSTM
7/28 89/68/79/+7/0.00/604/69 18 S RMY N/A
7/29 92/70/81/+9/0.00/830/95 21 W RMY N/A
7/30 89/72/81/+9/0.10/514/59 31 S RMY N/A
7/31 87/68/78/+6/0.00/870/100 28 W RMY N/A
8/1 88/68/78/+6/0.06/…/.. 28 WNW RMY N/A
8/2 86/62/74/+2/0.00/…/.. 24 SW RMY N/A
8/3 89/68/79/+7/0.00/…/.. 31 S RMY N/A
8/4 86/66/76/+4/0.31/…/.. 45 W RMY 50 TSTM
8/5 84/64/74/+2/0.00/…/.. 28 WNW RMY 27
8/6 low since midnight is 59F; normal low is now 63F
DAILY RECORDS FOR JULY 2015
7/10 – RECORD DAILY PRECIPITATION OF 1.95 INCHES,
surpasses previous record of 1.68 in. in 1933
7/20 – RECORD DAILY HIGH MINIMUM TEMPERATURE OF 73F,
ties previous record of 73F in 1977
DAILY RECORDS FOR AUGUST 2015
None so far.
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: Brian Fitzgerald
