Saturday, August 25, 2018

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 25, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

WIND FROM THE SOUTH BRINGS BACK ABOVE NORMAL TEMPERATURES…

With wind from the south temperatures returned to above
normal with a max so far today of 80F. This is two degrees
above the daily normal of 78F. The low so far today since
midnight is 63F also 2 degrees above the daily normal of
61F. The pressure began to drop this afternoon and we saw
the cloud cover increase of cirrostratus clouds and an
increase of cumulus clouds throughout the day. Wind from
the south was light for most of the day. So far today has
been dry, without precipitation and relative humidities
were mostly in the 60’s today making for fairly comfortable
warm but not sticky air.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrostratus,
few stratocumulus distant SSE-S
Temperature: 67F; Dew Point: 62F; Wind: SSW at 6 kts,
Wind: Light
Sea-level pressure: 30.33 ins. Hg, rising, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 67F
6-hr Min temp: 63F
24-hr Precip: 0.00 ins.
BHO SA 1155 110 SCT E250 BKN 30 272/67/62/2006/033/ FEW SC DSNT
SSE-S HAZY WND LGT/ 8/458 53013 10067 20063

10 A.M.
Weather: Scattered altocumulus, broken cirrostratus,
few cumulus distant SSE-SW
Temperature: 76F; Dew Point: 62F; Wind: S at 7G12 kts
Sea-level pressure: 30.33 ins. Hg, rising then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 110 SCT E250 BKN 30 272/76/62/1907G12/033/ FEW CU
DSNT SSE-SW HAZY/ 8/158 50000

1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 79F; Dew Point: 61F; Wind: S at 5 kts,
Wind: Light
Sea-level pressure: 30.22 ins. Hg, falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 80F
6-hr Min temp: 67F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT E250 BKN 30 253/79/61/1905/022/ HAZY WND
LGT/ 8/206 56018 10080 20067

SUMMARY FOR FRIDAY, AUGUST 24, 2018

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..78
MIN…..59   NORMAL…..61
MEAN….71   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL…………………….+1
TOTAL DEPARTURE FOR THE MONTH……………………+77 [+3.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6  DEPARTURE……….+1
TOTAL COOLING UNITS FOR THE MONTH………….224  DEPARTURE………+70
TOTAL COOLING UNITS FOR THE SEASON…………679  DEPARTURE……..+174
TOTAL COOLING UNITS LAST SEASON TO DATE…….604  DEPARTURE………+75

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………………20 SSE AT  5:59 P.M.
AERO……………………..18 SSE AT  5:59 P.M.
ASOS……………………..21 S   AT  6:00 P.M.
DAVIS…………………….19 M   AT  5:59 P.M.** RMY 20
FASTEST MILE FOR YESTERDAY…………………..13 SSE AT  5:57 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………..14 S   AT  6:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………….14 M   AT 10:05 P.M.**
AVERAGE WIND SPEED AND DIRECTION…………….8.9 W
ASOS…………………….9.6
DAVIS……………………8.8 M**
** DAVIS DIRECTION MALFUNCTIONING

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.95  DEPARTURE……+0.70
ASOS…………..3.94
TOTAL PRECIPITATION FOR THE YEAR……….37.96  DEPARTURE……+3.90
ASOS………….39.52

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  82/66/74/+2/T/199/23           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/761/88       30 SW  AERO 28 SW  RMY 31
8/3  88/74/81/+9/0.19/492/57        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/301/35        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/815/95        20 W   AERO 18 W   RMY 19
8/6  92/71/82/+10/0.00/822/96       20 W   AERO 16 WSW RMY N/A
8/7  92/73/83/+11/0.00/682/80       25 S   AERO 23 S   RMY 26
8/8  88/71/80/+8/0.70/460/54        25 SSW AERO 25 SSW RMY N/A TSTM
8/9  86/70/78/+6/0.07/509/60        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/T/651/77           17 NW  AERO 16 NW  RMY N/A
8/11 70/66/68/-3/…./000/00        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/…./000/00        23 NNE AERO 18 NNE RMY 21
8/13 69/64/67/-4/0.17/000/00        23 ENE AERO 21 ENE RMY 21
8/14 83/69/76/+5/0.00/502/60        25 S   AERO 23 S   RMY 24
8/15 86/68/77/+6/0.00/509/61        20 W   AERO 17 W   RMY 19
8/16 87/70/79/+8/0.00/…/..        20 W   AERO 18 W   RMY 20
8/17 83/67/75/+4/…./…/..        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/…./…/..        31 NE  AERO 30 NE  RMY 33 TSTM
8/19 68/62/65/-5/…./…/..        30 NE  AERO 30 NE  RMY 32
8/20 72/61/67/-3/0.00/…/..        28 ENE AERO 25 ENE RMY 27
8/21 69/61/65/-5/T/…/..           20 ESE AERO 17 ESE RMY N/A
8/22 82/62/72/+2/…./…/..        35 WNW AERO 35 WNW RMY 35
8/23 76/60/68/-2/…./…/..        25 NW  AERO 23 NW  RMY 27
8/24 82/59/71/+1/0.00/…/..        20 SSE AERO 18 SSE RMY 20

8/25 Low temp since midnight is 63F; normal low is now 61F

DAILY RECORDS FOR AUGUST 2018

08/03/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
BREAKS PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

08/07/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
BREAKS PREVIOUS RECORD OF 72F SET IN 1988

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR AUGUST 25
HIGH 93F IN 1947, 1948, 2007
LOW 41F IN 1940
PRECIP 2.69 INCHES IN 2010
PEAK GUST 60e MPH SSW IN 1941

RECORDS FOR AUGUST 26
HIGH 96F IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947

TODAY’S REPORT PREPARED BY: Samantha Richard and Kaitlin Geagan