Sunday, July 2, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 2, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
ANOTHER WARM BUT LESS HUMID DAY,
AFTERNOON SKIES BECOME MOSTLY SUNNY
Somewhat drier air has moved into the region following a
cold front. Dew points fell into the upper 50s this after-
noon, while temperatures rose to 86F by the 1:00PM EST
observation. The southerly winds which helped to bring
hazy and humid conditions became westerly this morning.
Visibility cleared enough to reach 70 miles during the
last ob. The drier air has also helped clear the skies.
Mid- and high-level clouds from the morning have dis-
sipated, leaving just a few cumulus this afternoon.
PRELIMINARY STATS FOR JUNE 2017
TEMPERATURE, Deg. F
Avg. Max. 77.2 [+2.2]
Avg. Min. 57.8 [+0.7]
Mean 67.5 [+1.4]
24-hour corrected mean: 67.0
Max. for month: 94F on 12th
Min. for month: 45F on 6th
HEATING DEGREE DAYS
Total heating units: 63 [-10]
Total for the season: 5725 [-651]
Total for last season: 5282
COOLING DEGREE DAYS
Total cooling units: 145 [+40]
Total for the season: 201 [+72]
Total for last season: 157
PRECIPITATION, Inches
Total: 6.03 [+1.72]
Greatest in 24 hrs: 2.19 in on 5th-6th
WIND, mph
Avg. uncorrected wind speed: 11.7
Avg. corrected wind speed: 12.1
Prevailing wind direction: W at 15%
Peak gust and direction: 48 N on 9th
SUNSHINE:
Campbell-Stokes card minutes: 15,030 minutes of possible 26,376 or 57%
Astronomical total minutes: 15,613 minutes of possible 27,417 or 57%
Today’s Observations:
7 A.M.
Weather: Few cumulus SW-NNE, scattered altocumulus, scattered cirrus,
few cirrocumulus WSW
Temperature: 72F; Dew Point: 69F; Wind: W at 8 kts
Sea-level pressure: 29.93 ins. Hg, rising unsteadily
Visibility: 30 miles, distant haze in all directions
6-hr Max temp: 72F
6-hr Min temp: 69F
24-hr precip: Trace
BHO SA 1155 150 SCT 250 SCT 30 135/72/69/2608/993/ FEW CU SW-NNW
FEW CC WSW DSNT HZ ALQDS/ 8/139 52012 10072 20069
10 A.M.
Weather: Few cumulus WSW-NNE, few altocumulus NE-SE, few cirrus ENE-SSE
Temperature: 80F; Dew Point: 62F; Wind: W at 12G19 kts
Sea-level pressure: 30.93 ins. Hg, steady then falling slightly
Visibility: 60 miles, distant haze in all directions
BHO SA 1455 CLR 60 136/80/62/2712G19/993/ FEW CU WSW-NNE FEW AC NE-SE
FEW CI ENE-SSE DSNT HZ ALQDS/ 8/134 51001
1 P.M.
Weather: Few cumulus in all directions, few distant cirrus ENE-SSE
Temperature: 85F; Dew Point: 59F; Wind: W at 12G19 kts
Sea-level pressure: 29.91 ins. Hg, falling then steady
Visibility: 70 miles
6-hr Max temp: 86F
6-hr Min temp: 72F
BHO SA 1755 CLR 70 129/85/59/2612G19/991/ FEW CU ALQDS
FEW DSNT CI ENE-SSE/ 8/101 56007 10086 20072
SUMMARY FOR SATURDAY, JULY 1, 2017
TEMPERATURE (DEGREES F)
MAX…..85 NORMAL…..79
MIN…..67 NORMAL…..61
MEAN….76 NORMAL…..70
DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH…………………….+6 [+6.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..11 DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH…………..11 DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE SEASON…………212 DEPARTURE………+77
TOTAL COOLING UNITS LAST SEASON TO DATE…….168 DEPARTURE………+44
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….35 S AT 2:12 P.M.
AERO……………………37 S AT 2:13 P.M.
ASOS……………………38 S AT 2:13 P.M.
DAVIS…………………..34 S AT 2:58 P.M. RMY 38
FASTEST MILE FOR YESTERDAY…………………27 S AT 2:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………26 S AT 3:02 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24 S AT 6:08 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.6 SSW
ASOS………………….15.0
DAVIS…………………13.5 SSW [197 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00 DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….31.37 DEPARTURE……+4.29
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
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
6/1 78/55/67/+5/0.06/706/78 39 NW AERO 39 NW RMY 41
6/2 70/50/60/-2/T/652/72 32 WNW AERO 35 WNW RMY 34
6/3 66/47/57/-5/0.01/472/52 23 NW AERO 25 NW RMY 24
6/4 71/49/60/-3/0.28/490/54 21 SSE*AERO 21 SW RMY N/A
6/5 55/49/52/-11/1.20/000/00 32 NE AERO 35 NE RMY N/A
6/6 49/45/47/-16/1.36/000/00 40 ENE AERO 43 ENE RMY 43
6/7 65/47/56/-8/0.05/519/57 21 NNE AERO 18 NE* RMY 20
6/8 76/52/64/0/0.00/602/66 21 SSE AERO 21 SSE RMY 18
6/9 78/53/66/+2/0.16/438/48 48 N AERO 54 N RMY 52 TSTM
6/10 83/59/71/+6/0.00/722/79 25 SSW AERO 28 SSW RMY 27
6/11 89/64/77/+12/0.00/704/77 29 SW AERO 32 WSW RMY 30
6/12 94/69/82/+17/0.00/851/93 28 W AERO 29 W RMY 28
6/13 92/67/80/+15/0.03/796/87 25 W AERO 28 WNW RMY 28
6/14 78/56/67/+1/0.02/889/97 20 S AERO 20 S RMY 20
6/15 75/54/65/-1/0.00/870/95 25 SSW AERO 29 S RMY 30
6/16 70/56/63/-3/2.14/073/08 28 S AERO 29 S RMY N/A
6/17 70/58/64/-3/0.01/000/00 18 S AERO 18 S RMY N/A
6/18 82/65/74/+7/T/394/43 33 SSW*AERO 35 SSW RMY 37
6/19 82/67/75/+8/0.05/312/34 40 S AERO 43 S RMY 43
6/20 84/66/75/+7/0.25/651/71 38 SW AERO 44 SW RMY 40
6/21 83/64/74/+6/0.00/734/80 29 W AERO 30 W RMY 30
6/22 83/59/71/+3/0.00/779/85 23 W AERO 22 W RMY 21
6/23 88/66/77/+9/0.00/413/45 33 S AERO 36 S RMY 36
6/24 84/68/76/+7/0.19/413/45 28 WNW AERO 31 WNW RMY 32
6/25 83/61/72/+3/T/688/75 29 WNW AERO 35 WNW RMY 34
6/26 79/57/68/-1/0.00/843/92 24 W AERO 24 W RMY 23
6/27 74/55/65/-4/0.11/421/46 43 S AERO 45 S RMY 45
6/28 76/52/64/-6/0.00/897/98 28 W AERO 28 W RMY 28
6/29 78/60/69/-1/0.00/055/06 30 SSW AERO 30 SSW RMY 32
6/30 82/65/74/+4/0.11/229/25 30 SSW AERO 32 SSW RMY 32
DAILY RECORDS FOR JUNE
6/12/17: DAILY RECORD MAXIMUM TEMPERATURE OF 94F,
BREAKS PREVIOUS RECORD OF 92F SET IN 1973
6/12/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
TIES PREVIOUS RECORD SET IN 1942
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/…/.. 35 S AERO 37 S RMY 38
7/2 Low temp since midnight is 69F; normal low is now 62F
DAILY RECORDS FOR JULY
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999
RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
