Wednesday, July 5, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 5, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
WINDS SHIFT NE AS INCREASING HIGH PRESSURE MOVES EAST
High pressure continued to build and provide clear
skies and warm temperatures today. Few cumulus and
cirrus were spotted at each observation. Winds have
remained light but have shifted out of the northeast
as high pressure moves offshore. Today saw another
day of dew points in the low 50s with visibility at
70 miles.
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 cirrus SSE-SW
Temperature: 69F; Dew Point: 53F; Wind: NE at 4 kts,
Wind speed: Light
Sea-level pressure: 30.22 ins. Hg, rising, then more quickly
Visibility: 70 miles, thin smoke layer along horizon
6-hr Max temp: 69F
6-hr Min temp: 62F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 235/69/53/0504/022/ FEW CI SSE-SW THN K LYR ALG HRZN
WND LGT/ 8/001 53019 10069 20062
10 A.M.
Weather: Few cumulus in all directions, few cirrus SE-SW
Temperature: 78F; Dew Point: 50F; Wind: NE at 6 kts,
Wind speed: Light
Sea-level pressure: 30.24 ins. Hg, rising then steady
Visibility: 70 miles
BHO SA 1455 CLR 70 241/78/50/0406/024/ FEW CU ALQDS FEW CI SE-SW
WND LGT/ 8/101 51006
1 P.M.
Weather: Few cumulus ESE-N, few cirrus SE-SSW
Temperature: 80F; Dew Point: 52F; Wind: NE at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.22 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 82F
6-hr Min temp: 69F
BHO SA 1755 CLR 70 235/80/52/0506/022/ FEW CU ESE-N FEW CI SE-SSW
WND LGT/ 8/101 58006 10082 20069
SUMMARY FOR TUESDAY, JULY 4, 2017
TEMPERATURE (DEGREES F)
MAX…..84 NORMAL…..80
MIN…..62 NORMAL…..62
MEAN….73 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL…………………….+2
TOTAL DEPARTURE FOR THE MONTH……………………+21 [+5.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………8 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..43 DEPARTURE………+19
TOTAL COOLING UNITS FOR THE SEASON…………244 DEPARTURE………+91
TOTAL COOLING UNITS LAST SEASON TO DATE…….186 DEPARTURE………+58
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….17 W AT 2:51 P.M.
AERO……………………17 W AT 2:28 P.M.
ASOS……………………18 W AT 2:52 P.M.
DAVIS…………………..16 W AT 2:51 P.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………11 NW AT 3:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13 NW AT 3:02 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 NW AT 3:02 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.7 WNW
ASOS…………………..7.3
DAVIS………………….5.4 NW [309 DEG.]
*last of multiple occurrences
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…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….31.37 DEPARTURE……+3.97
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 TSTM
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 TSTM
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 87/69/78/+8/T/…/.. 25 W* AERO 28 W* RMY 27
7/3 85/67/76/+5/0.00/…/.. 28 W* AERO 29 W RMY 30
7/4 84/62/73/+2/0.00/…/.. 17 W AERO 17 W RMY 18
7/5 Low temp since midnight is 62F; 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 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: Cecilia Borries-Strigle
