Sunday, July 16, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 16, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
TYPICAL SUMMER WEATHER RETURNS
Warm temperatures have returned to the region under
high pressure. Yesterday’s temps. reached 80F and
fell to an overnight low of 64F. The max. by 1:00PM
EST today was 85F. Lower humidities have also returned
with relative humidity reaching 46% and dew points
falling into the low 60s during the 1:00PM ob.
Today saw another day of light and variable winds. Skies
were mostly clear in the morning except for some distant
cirrus clouds to the southeast. Diurnal cumulus had begun
to form by late morning, and skies were partly cloudy in
the afternoon. Horizontal visibility returned to 60-70
miles.
Today’s Observations:
7 A.M.
Weather: Few distant cirrus ESE-S
Temperature: 70F; Dew Point: 65F; Wind: NW at 6 kts,
Wind speed: Light
Sea-level pressure: 29.94 ins. Hg, rising steadily
Visibility: 70 miles
6-hr Max temp: 70F
6-hr Min temp: 64F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 139/70/65/3106/994/ FEW CI DSNT ESE-S WND LGT/
8/001 52015 10070 20064
10 A.M.
Weather: Few cumulus in all directions
Temperature: 78F; Dew Point: 61F; Wind: NW at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.95 ins. Hg,
Visibility: 60 miles
BHO SA 1455 CLR 60 143/78/61/3104/995/ FEW CU ALQDS WND L/V/
8/100 53004
1 P.M.
Weather: Scattered cumulus
Temperature: 84F; Dew Point: 61F; Wind: WSW at 5 kts,
Wind: Light and variable
Sea-level pressure: 29.94 ins. Hg, steady then falling
Visibility: 70 miles
6-hr Max temp: 85F
6-hr Min temp: 70F
BHO SO 1755 50 SCT 70 138/84/61/2505/994/ WND L/V/ 8/100 56005
10085 20070
SUMMARY FOR SATURDAY, JULY 15, 2017
TEMPERATURE (DEGREES F)
MAX…..80 NORMAL…..81
MIN…..60 NORMAL…..63
MEAN….70 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH…………………….+2 [-0.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………5 DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH………….106 DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE SEASON…………307 DEPARTURE………+78
TOTAL COOLING UNITS LAST SEASON TO DATE…….262 DEPARTURE………+45
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 S AT 7:25 P.M.
AERO……………………16 S AT 7:25 P.M.
ASOS……………………19 S AT 7:25 P.M.
DAVIS…………………..15 SSW AT 6:42 P.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………12 S AT 7:23 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13 S AT 8:03 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 SSW AT 6:47 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..4.5 S
ASOS…………………..5.4
DAVIS………………….3.4 SSW [201 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.51 DEPARTURE……-0.29
ASOS…………..1.48
TOTAL PRECIPITATION FOR THE YEAR……….32.88 DEPARTURE……+4.11
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/…/.. 15 E AERO 14 E RMY 14
7/15 80/60/70/-2/0.00/…/.. 18 S AERO 16 S RMY 18
7/16 Low temp since midnight is 64F; normal low is now 63F
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 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.97 INS IN 2014
WIND 48e MPH SW 1944
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
