Sunday, August 27, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 27, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER COOL BUT PLEASANT DAY

With high pressure still over the region, low dew points and
mostly sunny skies persist at Great Blue Hill. The clear night
skies allowed temperatures to fall to an overnight low of 55F.
Temperatures had again reached 75F by 1:00PM EST, and dew
points measured in the low 50s and upper 40s for most of the
day. Distant haze limited visibility to 60 miles during each
observation. Winds were light and out of the north to northeast.

Today’s Observations:

7 A.M.
Weather: Few distant cumulus NE
Temperature: 58F; Dew Point: 48F; Wind: N at 8 kts
Sea-level pressure: 30.30 ins. Hg, rising then steady
Visibility: 50 miles
6-hr Max temp: 58F
6-hr Min temp: 55F
24-hr Precip: 0.00 in.
BHO SA 1155 CLR 60 260/58/48/3608/030/ FEW CU DSNT NE/
8/100 51009 10058 20055

10 A.M.
Weather: Few cumulus SE-N, few cirrus SE-SW
Temperature: 69F; Dew Point: 51F; Wind: NNE at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.31 ins. Hg, rising then steady
Visibility: 60 miles, distant haze in all directions
BHO SA 1455 CLR 60 264/69/51/0304/031/ FEW CU SE-N FEW CI
SE-SW DSNT HZ ALQDS WND L/V/ 8/101 51004

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 73F; Dew Point: 44F; Wind: NE at 8 kts
Sea-level pressure: 30.29 ins. Hg, falling, then more slowly
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 75F
6-hr Min temp: 58F
BHO SA 1755 69 SCT 250 SCT 60 257/73/44/0507/029/ DSNT
HZ ALQDS/ 8/101 56007 10075 20058

SUMMARY FOR SATURDAY, AUGUST 26, 2017

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..78
MIN…..55   NORMAL…..61
MEAN….65   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………+29 [+0.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE MONTH………….184   DEPARTURE………+20
TOTAL COOLING UNITS FOR THE SEASON…………605   DEPARTURE………+90
TOTAL COOLING UNITS LAST SEASON TO DATE…….744   DEPARTURE……..-139

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….16 WNW AT 10:40 A.M.
AERO……………………16 SSE AT  9:38 P.M.
ASOS……………………17  NW AT 10:50 A.M.
DAVIS…………………..16 WNW AT 10:03 A.M. RMY 17
FASTEST MILE FOR YESTERDAY…………………11  NW AT 10:53 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13  NW AT 10:54 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 WNW AT 10:53 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.8  NW
ASOS…………………..7.9
DAVIS………………….6.6  NW [314 DEG.]

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……….1.44  DEPARTURE……-2.04
ASOS…………..1.43
TOTAL PRECIPITATION FOR THE YEAR……….36.20  DEPARTURE……+1.73
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

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  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29
8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/831/98               18 S   AERO 18 S   RMY 19
8/10 86/63/75/+4/T/643/76                  20 S   AERO 18 S   RMY 20
8/11 82/63/73/+2/0.00/666/79               17 S   AERO 16 S   RMY 17
8/12 75/57/66/-5/0.17/294/35               22 SSW*AERO 22 SSW RMY 23
8/13 84/67/76/+5/0.00/796/95               26 WNW AERO 24 WNW RMY 26
8/14 82/67/75/+4/0.00/359/43               14 SSW*AERO 14 S   RMY 15
8/15 79/64/72/+1/T/058/07                  21 S   AERO 21 S   RMY 23
8/16 83/64/74/+3/0.00/698/84               23 NW* AERO 23 NW  RMY 25
8/17 81/58/70/-1/0.00/…/..               15 SSW AERO 14 SSW RMY N/A
8/18 79/63/71/0/0.01/…/..                33 S   AERO 35 S   RMY 35
8/19 89/65/77/+7/0.00/…/..               23 WSW AERO 23 WSW RMY 25
8/20 84/66/75/+5/0.00/…/..               23 NW  AERO 25 NW  RMY 27
8/21 85/63/74/+5/0.00/…/..               18 SW  AERO 20 SW  RMY 20
8/22 88/68/78/+8/0.00/…/..               31 S   AERO 35 S   RMY 34
8/23 83/64/74/+4/0.04/…/..               24 WNW*AERO 25 WNW RMY 27
8/24 80/59/70/0/0.00/…/..                18 WNW*AERO 17 WNW RMY 21
8/25 75/57/66/-3/T/…/..                  21 NW  AERO 21 NW  RMY 23
8/26 75/55/65/-4/0.00/…/..               16 WNW AERO 16 SSE RMY 17

8/27 Low temp since midnight is 55F; normal low is now 60F

DAILY RECORDS FOR AUGUST

None so far.

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

RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983

RECORDS FOR AUGUST 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE IN 1971 (DORIA)

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle