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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 23, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME
HUMID DAY WITH CLOUDY SKIES AND INTERMITTENT RAIN SHOWERS…
The overnight low of 71F is 8 degrees above the daily
normal of 63F. So far max temperatures have been close
to normal with a max of 79F so far today. This is 2
degrees below the daily normal of 81F degrees. The air
was very humid today with dew points in the low 70’s
throughout the day. With high humidity, visibility was
obscured today with a max of 20 miles by 1:00 P.M. The
intermittent rain showers began yesterday and we have
had a few showers so far today. Since 10:00 A.M. yesterday
we have measured 0.33 inches of rainfall. With the rain
showers the past couple days we are now 0.25 ins. of above
normal for precipitation for the month of July. Even though
the past couple of days have been below normal for temperature,
with a warm beginning, July is still running about 2 degrees
above normal for temperature. Wind from the south was moderate
today with frequent gust over 22 kts (25 MPH) and a peak gust
so far of 28 kts (32 MPH).
Today’s Observations:
7 A.M.
Weather: Scattered stratus fractus, overcast stratus
Temperature: 73F; Dew Point: 72F; Wind: SSE at 11G21 kts
Sea-level pressure: 30.22 ins. Hg, rising, then more slowly
Visibility: 15 miles, distant fog in all directions
6-hr Max temp: 73F
6-hr Min temp: 71F
24-hr Precip: 0.27 ins.
BHO SA 1155 9 SCT E11 OVC 15 233/73/72/1611G21/022/ DSNT
FG ALQDS/ 8/6// 51013 MANUAL 70027 ASOS 70028 10073 20071
10 A.M.
Weather: Very light drizzle, scattered stratus fractus,
broken stratocumulus, overcast nimbostratus
Temperature: 76F; Dew Point: 73F; Wind: SSE at 11G19 kts,
Peak Wind: 28 kts (32 MPH) SSE at 9:03 A.M.
Sea-level pressure: 30.25 ins. Hg, steady then rising
Visibility: 15 miles, except 5 miles WNW-ENE fog. Distant
fog ENE-WNW
3-hr Precip: 0.01 ins.
BHO SA 1455 9 SCT E21 BKN E26 OVC 15L- 243/76/73/1611G19/025/
PCPN VRY LGT L-B45 VSBY 5F WNW-ENE DSNT FG ENE-WNW PK WND
1628/03/ 8/52/ 51010 MANUAL 6001/ ASOS 60001
1 P.M.
Weather: Scattered stratus fractus, broken stratocumulus,
broken stratus, broken cirrus
Temperature: 79F; Dew Point: 73F; Wind: S at 15G25 kts
Sea-level pressure: 30.24 ins. Hg, falling then rising
Visibility: 20 miles, distant fog in all directions
6-hr Max temp: 79F
6-hr Min temp: 73F
6-hr precip: 0.06 ins.
BHO SA 1755 11 SCT E26 BKN E55 BKN E250 BKN 20 241/79/73/1815G25/024/
PK WND 1826/24/ 8/601 55002 MANUAL 6006/ ASOS 60005 10079 20073
SUMMARY FOR SUNDAY, JULY 22, 2018
TEMPERATURE (DEGREES F)
MAX…..76 NORMAL…..81
MIN…..62 NORMAL…..63
MEAN….69 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………+46 [+1.9 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………4 DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE MONTH………….191 DEPARTURE………+38
TOTAL COOLING UNITS FOR THE SEASON…………350 DEPARTURE………+68
TOTAL COOLING UNITS LAST SEASON TO DATE…….399 DEPARTURE………-49
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..29 ESE AT 6:57 A.M.
AERO…………………….28 ESE AT 6:40 A.M.
ASOS…………………….28 ESE AT 7:34 A.M.
DAVIS……………………30 S AT 11:43 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….21 ESE AT 6:58 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 ESE AT 6:55 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 ESE AT 7:00 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..13.0 SSE
ASOS…………………..12.7
DAVIS………………….13.0 SE [143 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.27 DEPARTURE……+0.14
ASOS…………..0.28
TOTAL PRECIPITATION FOR THE MONTH……….2.97 DEPARTURE……+0.25
ASOS…………..3.01
TOTAL PRECIPITATION FOR THE YEAR……….33.14 DEPARTURE……+3.63
ASOS………….34.74
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
7/01 94/72/83/+13/0.00/667/73 21 ESE AERO 18 ESE RMY 19
7/02 90/68/79/+9/0.00/858/94 21 S AERO 21 S RMY 22
7/03 94/69/82/+11/0.00/657/72 20 SSW AERO 18 SW RMY 19 TSTM
7/04 89/73/81/+10/0.00/884/97 17 NE AERO 15 NE RMY 16
7/05 91/73/82/+11/0.00/865/95 29 SSW AERO 28 SSW RMY N/A
7/06 80/59/70/-1/0.56/018/02 37 NNW AERO 38 SW RMY 40 TSTM
7/07 78/54/66/-5/0.00/900/99 22 N AERO 18 N RMY N/A
7/08 83/57/70/-2/0.00/890/98 23 S AERO 21 S RMY 22
7/09 88/60/74/+2/0.00/852/94 23 SW AERO 23 SW RMY 24
7/10 91/63/77/+5/0.10/751/83 24 W AERO 22 W RMY N/A
7/11 73/62/68/-4/0.63/705/78 28 NE AERO 25 NE RMY 27 TSTM
7/12 77/56/67/-5/0.00/867/96 16 NW AERO 15 NW RMY N/A
7/13 84/61/73/+1/0.00/568/63 23 SSE AERO 23 SSE RMY 24
7/14 80/61/71/-1/0.00/540/60 18 S AERO 16 S RMY 19
7/15 84/65/75/+3/T/521/58 16 S AERO 15 S RMY 14
7/16 83/67/75/+3/0.00/682/76 23 S AERO 23 S RMY 23
7/17 88/67/78/+6/1.34/430/48 31 SW AERO 30 SW RMY 32 TSTM
7/18 81/63/72/0/0.02/769/86 21 NW AERO 22 NW RMY 23
7/19 80/56/68/-4/0.00/…/.. 21 S AERO 17 SSE RMY 19
7/20 83/62/73/1/0.00/…/.. 21 SE AERO 17 ESE RMY 19
7/21 76/59/68/-4/…./…/.. 23 ENE AERO 20 ENE RMY N/A
7/22 76/63/69/-3/…./…/.. 29 ESE AERO 28 ESE RMY N/A
7/23 Low temp since midnight is 71F; normal low is now 63F
DAILY RECORDS FOR JULY 2018
07/01/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 72F,
TIES PREVIOUS RECORD OF 72F SET IN 1968
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 23
HIGH 99F IN 1952
LOW 51F IN 1923,1977
PRECIP 1.82 INS IN 1953
PEAK GUST 54e MPH S IN 1946
RECORDS FOR JULY 24
HIGH 96F IN 1987
LOW 49F IN 1893,1912
PRECIP 2.27 INS IN 2008
PEAK GUST 46 MPH NE IN 2009
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
