Monday, August 28, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 28, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

HIGH PRESSURE REMAINS IN PLACE, MILD WEATHER CONTINUES

Ground fog developed early this morning to create partial
undercast conditions at 6:00AM EST.  Most of the fog had
dissipated by the 7:00AM observation.  Distant fog and haze
kept visibility between 35-50 miles today despite low
humidity and winds out of the northeast.  Dew points fell
to the mid-40s in the afternoon.  Temperatures had risen
to 74F by 1:00PM.

Today’s Observations:

7 A.M.
Weather: Few cumulus SE-S, few cirrus in all directions,
patches of radiation fog below summit to the northeast
Temperature: 61F; Dew Point: 51F; Wind: NNE at 5 kts,
Wind speed: Light
Sea-level pressure: 30.34 ins. Hg, rising, then more quickly
Visibility: 40 miles, except for 35 miles S,
distant fog in all directions
6-hr Max temp: 61F
6-hr Min temp: 56F
24-hr Precip: 0.00 in.
BHO SA 1155 CLR 40 274/61/51/0305/034/ FEW CU DSNT SE-S
FEW CI ALQDS VSBY S 35 PTCHS GF BLO SMT NE DSNT FG ALQDS
WND LGT/ 8/101 53021 10061 20056

10 A.M.
Weather: Few cumulus ESE-NNE, few cirrus SSW-NE
Temperature: 70F; Dew Point: 50F; Wind: ENE at 7 kts
Sea-level pressure: 30.37 ins. Hg, rising, then more slowly
Visibility: 40 miles, distant haze in all directions
BHO SA 1455 CLR 40 286/70/50/0607/037/ FEW CU ESE-NNE
FEW CI SSE-NW DSNT HZ ALQDS/ 8/101 51012

1 P.M.
Weather: Few cumulus E-NE, few cirrus in all directions
Temperature: 73F; Dew Point: 45F; Wind: NE at 9G14 kts,
Wind directions: variable N to E
Sea-level pressure: 30.33 ins. Hg, falling, then more slowly
Visibility: 50 miles, distant haze in all directions
6-hr Max temp: 74F
6-hr Min temp: 61F
BHO SA 1755 CLR 50 270/73/45/0509G14/033/ FEW CU E-NE FEW CI
ALQDS DSNT HZ ALQDS WND 36V09/ 8/101 56016 10074 20061

SUMMARY FOR SUNDAY, AUGUST 27, 2017

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..78
MIN…..55   NORMAL…..60
MEAN….65   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………+25 [+0.7 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………+15
TOTAL COOLING UNITS FOR THE SEASON…………605   DEPARTURE………+85
TOTAL COOLING UNITS LAST SEASON TO DATE…….755   DEPARTURE……..-150

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….17 ENE AT 3:53 P.M.*
AERO……………………16 ENE AT 2:50 P.M.*
ASOS……………………19 ENE AT 3:35 P.M.
DAVIS…………………..17 ENE AT 2:45 P.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………14 ENE AT 3:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 ENE AT 3:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 ENE AT 2:50 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.3  N
ASOS…………………..8.7
DAVIS………………….6.7 NE [036 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……….1.44  DEPARTURE……-2.15
ASOS…………..1.43
TOTAL PRECIPITATION FOR THE YEAR……….36.20  DEPARTURE……+1.62
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 75/55/65/-4/0.00/…/..               17 ENE*AERO 16 ENE*RMY 18

8/28 Low temp since midnight is 56F; 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 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE IN 1971 (DORIA)

RECORDS FOR AUGUST 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S IN 1949

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle