Friday, August 31, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 31, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

NORTHEASTERLY WIND BRINGS COOLER TEMPERATURES TO
GREAT BLUE HILL…

Pressure rose greatly overnight and the day began
with mostly cloudy skies but cleared throughout
the day. By 10:00 A.M we had a mixture of clouds
with cumulus, altocumulus and cirrostratus. With
low humidity today visibility remained consistent
at 60 miles with a distant lingering haze.
Wind from the Northeast was breezy in the early hours
but became lighter mid-morning then picked up
again throughout the afternoon.
Temperatures dropped overnight to below seasonable
with a max so far of 72F by 1:00 P.M. This is 5
degrees below the daily normal of 77F. Overnight
temperatures were above normal though with a low
of 63 since midnight. This is 3 degrees above the
daily normal of 60F.

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus, broken stratcumulus,
broken stratus
Temperature: 64F; Dew Point: 61F; Wind: NNE at 6G14 kts,
Wind: Light
Sea-level pressure: 30.32 ins. Hg, rising, then more rapidly
Visibility: 60 miles, distant fog in all directions
6-hr Max temp: 66F
6-hr Min temp: 63F
24-hr Precip: 0.00 ins.
BHO SA 1155 20 SCT E26 BKN 40 BKN 60 268/64/61/0306G14/032/
DSNT FG ALQDS WND LGT/ 8/600 53020 10066 20063

10 A.M.
Weather: Scattered stratocumulus, scattered cumulus,
scattered altocumulus, scattered cirrostratus
Temperature: 71F; Dew Point: 57F; Wind: ENE at 11G17 kts
Sea-level pressure: 30.35 ins. Hg, rising then falling
Visibility: 60 miles, distant haze in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 27 SCT 50 SCT 130 SCT 250 SCT 60 277/71/57/0611G17/035/
DSNT HZ ALQDS/ 8/378 51009

1 P.M.
Weather: Scattered stratocumulus and cumulus, scattered
altocumulus, scattered cirrostratus
Temperature: 71F; Dew Point: 56F; Wind: ENE at 11G18 kts
Sea-level pressure: 30.33 ins. Hg, falling, then more rapidly
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 72F
6-hr Min temp: 64F
6-hr Precip: 0.00 ins.
BHO SA 1755 30 SCT 110 SCT 220 SCT 60 272/71/56/0611G18/033/
DSNT HZ ALQDS/ 8/838 58005 10072 20064

SUMMARY FOR THURSDAY, AUGUST 30, 2018

TEMPERATURE (DEGREES F)
MAX…..88   NORMAL…..77
MIN…..67   NORMAL…..60
MEAN….78   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL……………………+10
TOTAL DEPARTURE FOR THE MONTH…………………..+127 [+4.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13  DEPARTURE……….+9
TOTAL COOLING UNITS FOR THE MONTH………….297  DEPARTURE……..+115
TOTAL COOLING UNITS FOR THE SEASON…………752  DEPARTURE……..+219
TOTAL COOLING UNITS LAST SEASON TO DATE…….605  DEPARTURE……..+147

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………………23 ENE AT 11:42 P.M.
AERO……………………..21 ENE AT 11:42 P.M.
ASOS……………………..25 NE  AT 11:42 P.M.
DAVIS…………………….25 NE  AT 11:41 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………..17 NE  AT  1:57 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………..20 ENE AT 11:45 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………….19 ENE AT 11:45 P.M.
AVERAGE WIND SPEED AND DIRECTION……………10.1 ENE
ASOS…………………….9.9
DAVIS…………………..10.4 N [348 DEG] * LAST OF MULTIPLE OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.95  DEPARTURE……+0.03
ASOS…………..3.94
TOTAL PRECIPITATION FOR THE YEAR……….37.96  DEPARTURE……+3.23
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/+5/0.00/651/77        17 NW  AERO 16 NW  RMY N/A
8/11 70/66/68/-3/0.34/000/00        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/0.39/000/00        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/+8/0.00/515/62        20 W   AERO 18 W   RMY 20
8/17 83/67/75/+4/…./531/64        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/…./165/20        31 NE  AERO 30 NE  RMY 33 TSTM
8/19 68/62/65/-5/…./527/64        30 NE  AERO 30 NE  RMY 32
8/20 72/61/67/-3/0.00/591/72        28 ENE AERO 25 ENE RMY 27
8/21 69/61/65/-5/T/155/19           20 ESE AERO 17 ESE RMY N/A
8/22 82/62/72/+2/…./326/40        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 80/59/70/+1/0.00/…/..        20 S   AERO 18 S   RMY 20
8/26 81/59/70/+1/0.00/…/..        21 SSW AERO 20 SSW RMY 21
8/27 86/67/77/+8/0.00/…/..        21 WNW AERO 18 WNW RMY 18
8/28 93/72/83/+14/0.00/…/..       25 WSW AERO 25 WSW RMY 28
8/29 94/75/85/+16/0.00/…/..       25 SW  AERO 24 SW  RMY 27
8/30 88/67/78/+10/0.00/…/..       23 ENE AERO 21 ENE RMY N/A

8/31 Low temp since midnight is 63F; normal low is now 60F

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

08/29/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 74F SET IN 1948

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

RECORDS FOR AUGUST 31
HIGH 94F IN 1953
LOW 42F IN 1976
PRECIP 2.46 INCHES IN 1954
PEAK GUST 125 MPH SE IN 1954 [CAROL – RECORD FOR MONTH]

RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975, 2017
PRECIP 2.32 INCHES IN 2013
PEAK GUST 59e MPH S IN 1945, SSW IN 1965

TODAY’S REPORT PREPARED BY: Kaitlin Geagan