Friday, August 11, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 11, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
MIX OF CLOUDS AS CUMULUS MOVE IN FROM THE WEST
Skies have been mostly cloudy all morning and early
afternoon with dissipating altocumulus and broken
cirrus. Distant cumulus clouds ahead of low pressure
in the west moved into the region by the 1:00PM ob.
Early morning fog had cleared for 40 miles of visibility
at 7:00AM. Visibility had reached 60 miles by 1:00PM.
Temperatures remain warm with a max. of 81F by 1:00PM.
The morning minimum temperature of 63F makes the day’s
average temperature just slightly above the normal temp.
Today’s Observations:
7 A.M.
Weather: Few distant cumulus E-S, scattered altocumulus,
broken altocumulus, broken cirrus
Temperature: 67F; Dew Point: 62F; Wind: S at 4 kts,
Wind speed: Light
Sea-level pressure: 30.19 ins. Hg, falling then rising
Visibility: 40 miles, distant fog in all directions
6-hr Max temp: 67F
6-hr Min temp: 63F
24-hr precip: 0.00 in.
BHO SA 1155 130 SCT E170 BKN 250 BKN 40 224/67/62/1904/019/
FEW CU DSNT E-S DSNT FG ALQDS WND LGT/ 8/131 55000 10067 20063
10 A.M.
Weather: Few distant cumulus E-NW, few altocumulus in all directions,
broken cirrus
Temperature: 76F; Dew Point: 52F; Wind: S at 6 kts,
Wind speed: Light
Sea-level pressure: 30.18 ins. Hg, falling then steady
Visibility: 40 miles
BHO SA 1455 E250 BKN 40 221/76/52/1806/018/ FEW CU DSNT E-NW
FEW AC ALQDS WND LGT/ 8/131 58003
1 P.M.
Weather: Few cumulus ENE-W, scattered altocumulus, broken cirrostratus
Temperature: 80F; Dew Point: 51F; Wind: S at 6 kts,
Wind speed: Light
Sea-level pressure: 30.15 ins. Hg, falling, then more quickly
Visibility: 60 miles
6-hr Max temp: 81F
6-hr Min temp: 66F
BHO SA 1755 150 SCT E280 BKN 60 211/80/51/1806/015/
FEW CU ENE-W WND LGT/ 8/137 58010 10081 20066
SUMMARY FOR THURSDAY, AUGUST 10, 2017
TEMPERATURE (DEGREES F)
MAX…..86 NORMAL…..80
MIN…..63 NORMAL…..63
MEAN….75 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH…………………….-1 [-0.3 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..10 DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE MONTH…………..68 DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON…………489 DEPARTURE………+67
TOTAL COOLING UNITS LAST SEASON TO DATE…….559 DEPARTURE………-70
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20 S AT 4:59 P.M.
AERO……………………18 S AT 4:59 P.M.
ASOS……………………20 S AT 4:59 P.M.
DAVIS…………………..18 SSW AT 4:49 P.M. RMY 20
FASTEST MILE FOR YESTERDAY…………………13 S AT 4:58 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 S AT 5:13 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 SSW AT 5:03 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.2 S
ASOS…………………..7.9
DAVIS………………….5.5 SSW [201 DEG.]
*last of multiple occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.22 DEPARTURE……-0.23
ASOS…………..1.22
TOTAL PRECIPITATION FOR THE YEAR……….35.98 DEPARTURE……+3.54
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/…/.. 16 ESE*AERO 16 NNW RMY 16
8/2 86/65/76/+4/1.09/…/.. 32 W AERO 36 W RMY 34 TSTM
8/3 83/65/74/+2/0.00/…/.. 22 S AERO 23 S RMY 24
8/4 84/66/75/+3/0.00/…/.. 26 S AERO 30 S RMY 29
8/5 75/63/69/-3/0.10/…/.. 23 NW AERO 28 NW RMY 29
8/6 76/57/67/-5/0.00/…/.. 30 NW AERO 32 NW RMY 31
8/7 76/60/68/-4/…./…/.. 28 SSW AERO 28 SSW RMY 29
8/8 74/60/67/-5/…./…/.. 17 S AERO 16 SSE RMY 16
8/9 83/58/71/-1/0.00/…/.. 18 S AERO 18 S RMY 19
8/10 86/63/75/+4/0.00/…/.. 20 S AERO 18 S RMY 20
8/11 Low temp since midnight is 63F; normal low is now 63F
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 11
HIGH 97F IN 1944
LOW 49F IN 1972
PRECIP 3.13 INCHES IN 1990
PEAK GUST 44 MPH SW IN 1971
RECORDS FOR AUGUST 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
