Sunday, July 14, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 14, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
WARM, FAIR WEATHER DAY WITH DROPPING HUMIDITY AND INCREASING
VISIBILITY….
Today has been warmer than average, with a high temperature
so far of 87F, which is 6 degrees warmer than our normal high
temperature, and a low temperature so far of 68F, which
is 5 degrees greater than our normal minimum temperature.
Weather today has been fair, with almost clear skies early
this morning, and only some scattered clouds as
the day progresses. Visibility has been increasing through
the day as humidity decreases and haze begins to dissipate.
PRELIMINARY STATS FOR JUNE 2019
TEMPERATURE, Deg. F
Avg. Max. 75.1 [+0.1]
Avg. Min. 57.3 [+0.2]
Mean 66.2 [+0.1]
24-hour corrected mean: 66.0
Max. for month: 88F on the 28th
Min. for month: 45F on the 4th
COOLING DEGREE DAYS
Total cooling units: 81 [-24]
Total for the season: 89 [-40]
Total for last season: 159
HEATING DEGREE DAYS
Total cooling units: 36 [-37]
Total for the season: 6254 [-122]
Total for last season: 5916
PRECIPITATION, Inches
Total: 4.08 [-0.23]
Greatest in 24 hrs: 1.30 ins. on the 10th-11th
WIND, mph
Avg. uncorrected wind speed: 9.9
Avg. corrected wind speed: 10.5
Prevailing wind direction: S at 17%
Peak gust and direction: 41 W on 3rd
SUNSHINE:
Campbell-Stokes card minutes: 14118 minutes of possible 26376 or 54%
Astronomical total minutes: 14674 minutes of possible 27416 or 54%
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus in all directions
Temperature: 75F; Dew Point: 66F; Wind: W at 7 kts
Sea-level pressure: 29.88 ins. Hg, falling then rising
Visibility: 30 miles, distant haze
6-hr Max temp: 75F
6-hr Min temp: 68F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 30 118/75/66/2607/988/ FEW AC ALQDS DSNT HZ ALQDS/
8/060 53004 10075 20068
10 A.M.
Weather: Scattered cumulus, few cirrostratus in all directions
Temperature: 82F; Dew Point: 67F; Wind: W at 5 kts,
Wind: Light
Sea-level pressure: 29.87 ins. Hg, steady then falling
Visibility: 40 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 45 SCT 40 114/82/67/2705/987/ FEW CS ALQDS
DSNT HZ ALQDS WND LGT/ 8/105 58004
1 P.M.
Weather: Scattered cumulus
Temperature: 84F; Dew Point: 63F; Wind: W at 7 kts
Sea-level pressure: 29.84 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze
6-hr Max temp: 87F
6-hr Min temp: 75F
6-hr Precip: 0.00 ins.
BHO SA 1755 45 SCT 70 107/84/63/2707/984/ DSNT HZ ALQDS/
8/100 58007 10087 20075
SUMMARY FOR SATURDAY, JULY 13, 2019
TEMPERATURE (DEGREES F)
MAX…..85 NORMAL…..81
MIN…..65 NORMAL…..63
MEAN….75 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL………………….+3
TOTAL DEPARTURE FOR THE MONTH…………………+50 [+3.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..10 DEPARTURE………+3
TOTAL COOLING UNITS FOR THE MONTH………….132 DEPARTURE……..+54
TOTAL COOLING UNITS FOR THE SEASON…………221 DEPARTURE………+7
TOTAL COOLING UNITS LAST SEASON TO DATE…….286 DEPARTURE……..-65
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 W AT 2:59 P.M.
AERO…………………….20 WSW AT 3:01 P.M.
ASOS…………………….21 NW AT 2:37 A.M.
DAVIS……………………20 NW AT 2:37 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………….15 NW AT 4:11 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 NW AT 4:19 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 W AT 3:02 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….8.7 NW
ASOS…………………….9.5
DAVIS……………………9.2 WNW [282 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……….1.45 DEPARTURE……-0.08
ASOS…………..1.45
TOTAL PRECIPITATION FOR THE YEAR……….31.32 DEPARTURE……+2.82
ASOS………….31.22
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
06/01 71/54/63/+1/0.00/551/61 21 E AERO 20 E RMY 18
06/02 75/51/63/+1/0.02/417/46 23 S AERO 21 S RMY N/A
06/03 69/50/60/-2/0.02/753/83 41 W AERO 39 W RMY 43
06/04 70/45/58/-5/0.00/717/79 29 W AERO 23 W RMY N/A
06/05 81/57/69/+6/0.03/527/58 33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/0.06/428/47 28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76 23 S AERO 23 S RMY 22
06/08 78/57/68/+4/0.00/885/97 23 ENE AERO 21 SW RMY 21
06/09 78/55/67/+3/0.00/840/93 22 S AERO 21 S RMY 21
06/10 79/54/67/+2/0.29/712/78 26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/1.03/247/27 32 NW AERO 30 NW RMY 35
06/12 75/52/64/-1/0.00/869/95 25 SSW AERO 25 S RMY 28
06/13 55/49/52/-13/0.81/000/00 36 NE AERO 35 NE RMY 35
06/14 72/50/61/-5/0.00/540/59 38 W AERO 39 W RMY 38
06/15 79/54/67/+1/0.00/879/96 38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/0.13/000/00 32 SW AERO 35 SW RMY N/A
06/17 74/62/68/+1/0.00/348/38 12 SSE AERO 18 NW RMY 17
06/18 71/62/67/0/0.10/000/00 17*S AERO 17 S RMY 16
06/19 74/61/68/+1/0.00/101/11 16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/0.26/000/00 26 S AERO 26 S RMY 29
06/21 68/58/63/-5/0.75/018/02 32 NW AERO 28 NW RMY 33
06/22 77/56/67/-1/T/779/85 33 NW AERO 32 NW RMY 35
06/23 82/59/71/+3/0.00/871/95 30 NW AERO 25 WNW RMY 29
06/24 84/61/73/+4/0.00/779/85 22 NW AERO 21 NW RMY 22
06/25 73/61/67/-2/0.18/083/09 35 S AERO 37 S RMY 37
06/26 77/64/71/+2/0.00/559/61 12 ENE AERO 18 SE RMY N/A
06/27 81/57/69/0/0.00/614/67 21 NE AERO 18 NE RMY N/A
06/28 88/64/76/+6/0.00/870/95 16 SW AERO 18 SW RMY N/A
06/29 80/66/73/+3/0.29/165/18 25 W AERO 25 W RMY 26
06/30 75/59/67/-3/0.13/430/47 31 N AERO 30 N RMY 35
*Estimated
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
07/01 83/58/71/+1/0.00/…/.. 21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/…/.. 23 W AERO 23 W RMY 23
07/03 89/67/78/+7/0.00/…/.. 18 S AERO 18 S RMY 18
07/04 88/68/78/+7/0.00/…/.. 17 SSW AERO M M RMY 17
07/05 87/69/78/+7/0.00/…/.. 21 SW AERO M M RMY 21
07/06 90/71/81/+10/0.83/…/.. 26 WNW AERO M M RMY N/A
07/07 78/64/71/0/0.00/…/.. 30 NE AERO M M RMY N/A
07/08 79/59/69/-3/0.00/…/.. 16 N AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/…/.. 18 NW AERO 16 NW RMY 18
07/10 88/69/79/+7/0.00/…/.. 20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/…./…/.. 35 S AERO 33 S RMY 36
07/12 84/68/76/+4/…./…/.. 31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/…/.. 21 W AERO 20 WSW RMY 20
07/13 Low temp since midnight is 68F; normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 1.97 INS IN 1960
WIND 110e MPH NW IN 1942 [THUNDERSTORM GUST; RECORD FOR MONTH]
RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002
TODAY’S REPORT PREPARED BY: Samantha Richard
