Saturday, August 14, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, AUGUST 14, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0451E
SUNSET: 1846E
HOT AND HUMID WEATHER CONTINUES, BUT RELIEF EXPECTED TO ARRIVE
OVERNIGHT…
Thanks to some cloud cover that moved through this morning, temperatures
were tempered a bit, but it’s still hot. While surrounding areas did
make it to 90F today, here on the summit we only managed the upper 80s,
as such we have not had an official heat-wave up here this week as we
only had 2 days that made it to 90+F.
Regardless of missing out on an official heat-wave, the humidity levels
have been oppressive for the last 4 days with dew points into the low
to mid 70s. Relief from the oppressive humidity is forecast to arrive
overnight with tomorrow promising to be a much nicer day with dry air
and cooler temperatures (low to mid 80s).
Visibility has been on the lower side thanks to considerable water vapor
in the air. A measly 30 miles is the average for the day.
The wind has once again been mainly on the light side, but not as
non-existent as it was yesterday. A westerly breeze has been averaging
5-10mph most of the day so far, with an occasional gust around 20mph.
The high so far today is 87F, 6 degrees above the daily normal maximum
of 81F. The low so far today is 74F, which is 11 degrees above the daily
normal minimum of 63F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus/castellanus
Temperature: 77F; Dew Point: 72F; Relative Humidity: 85%
Wind: W @ 7 kts
Sea-level pressure: 30.03 in. Hg; rising, then more slowly
Visibility: 25 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 69F
24-hr Precip: 0.00 ins.
BHO SA 1155 120 SCT 25 169/77/72/2607/003/ THN K LYR ALNG HRZN ALQDS HAZY/
8/080 51012 10077 20069
10 A.M.
Weather: Scattered cumulus, broken altocumulus/castellanus, cumulonimbus distant S-SW
Temperature: 84F; Dew Point: 73F; Relative Humidity: 70%
Wind: W @ 8 kts
Sea-level pressure: 30.03 in Hg; rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 60 SCT 120 BKN 30 169/84/73/2608/003/ CB DSNT S-SW HAZY/ 8/380 50000
1 P.M.
Weather: Scattered altocumulus/castellanus, broken cirrostratus,
few cumulus all quadrants
Temperature: 83F, Dew point: 74F; Relative Humidity: 75%
Wind: W @ 8 kts
Sea-level pressure: 30.02 in Hg; falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 77F
6-hr Precip: Trace
BHO SA 1755 120 SCT 220 BKN 35 166/83/74/2808/002/ FEW CU ALQDS HAZY/
8/288 58003 6000/ 10087 20077
SUMMARY FOR FRIDAY, AUGUST 13, 2021
TEMPERATURE (DEGREES F)
MAX…….92 NORMAL…..81
MIN…….73 NORMAL…..63
MEAN……83 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+11
TOTAL DEPARTURE FOR THE MONTH…………………..+6 [+0.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………..28 DEPARTURE…….+18
TOTAL HEATING UNITS LAST SEASON TO DATE……….1 DEPARTURE…….+27
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY……………18 DEPARTURE…….+11
TOTAL COOLING UNITS FOR THE MONTH…………..104 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….483 DEPARTURE……..-3
TOTAL COOLING UNITS LAST SEASON TO DATE……..662 DEPARTURE……-179
PEAK WIND GUST (MPH):
Official……………….18 WSW @ 12:47 A.M.
AEROVANE (south tower)…..18 WSW @ 12:28 A.M.
VECTOR #2 (south tower)….20 @ 12:47 A.M.
DAVIS #2 (south tower)…..18 WSW @ 12:26 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY…………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 WSW @ 12:28 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 12:26 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 WSW @ 12:27 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 7.1 WSW [170 total miles]
VECTOR #2……………. 8.3
DAVIS #2…………….. 8.0 W
RMY……………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.12
TOTAL PRECIPITATION FOR THE MONTH………….2.76 DEPARTURE….+1.06
TOTAL PRECIPITATION FOR THE YEAR………….37.73 DEPARTURE….+5.59
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
08/01 77/58/68/-5/T/589/68 23 SSW AERO 24 SSW RMY N/A
08/02 78/61/70/-3/T/821/95 28 WNW AERO 28 WNW RMY N/A
08/03 76/60/68/-5/0.00/302/35 15 N AERO 16 N RMY N/A
08/04 75/61/68/-5/0.71/077/09 21 ESE AERO 21 ESE RMY N/A
08/05 68/61/65/-8/1.68/000/00 28 NE AERO 28 NE RMY N/A
08/06 85/62/74/+1/0.00/727/85 19 S AERO 20 WSW RMY N/A
08/07 88/66/77/+4/0.00/520/61 23 SW AERO 23 SW RMY N/A
08/08 80/67/74/+2/T/128/15 16 SW AERO 16 WNW RMY N/A
08/09 75/64/70/-2/0.25/076/09 22 ENE AERO 21 NE RMY N/A
08/10 78/63/71/-1/0.12/…/.. 19 S AERO 20 S RMY N/A
08/11 89/70/80/+8/0.00/…/.. 29 SSW AERO 28 SSW RMY N/A
08/12 91/71/81/+9/0.00/…/.. 36 WSW AERO 37 WSW RMY N/A
08/13 92/73/83/+11/0.00/…/.. 18 WSW AERO 18 WSW RMY N/A
08/14 The low since midnight is 74F, the daily normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963
RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011
PEAK GUST 44e MPH S IN 1941
TODAY’S REPORT PREPARED BY: Matt Douglas
