Wednesday, August 10, 2022
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, AUGUST 10, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0446E
SUNSET: 1852E
6 DAY HEAT WAVE FINALLY ENDS, MUCH COOLER AND LESS HUMID TODAY….
Much cooler and less humid weather has arrived in the wake of
the brutal six-day heat wave that ended yesterday. Something that
really made this heat wave spectacular is the fact that all six
days registered a maximum temperature of 95F or higher! Pretty
amazing considering our elevation keeps us a bit cooler than
surrounding areas.
This was the first time on record of having two separate heat
waves of six days or longer in a single year.
BHO Longest Heat Waves (1885-2022):
1) 9 days, Aug 11-19, 2002
2) 8 days, Aug 10-17, 1944
3) 7 days, Jul 22-28, 2016
4) 6 days, Aug 28 – Sep 2, 1953
6 days, Jul 24-29, 1963
6 days, Jul 16-21, 1977
6 days, Jul 6-11, 1988
6 days, Jul 16-21, 1991
6 days, Jul 15-20, 2013
6 days, Jul 19-24, 2022
6 days, Aug 4-9, 2022
The humidity also crested yesterday, especially for a few hours
following the round of thunderstorms that rolled through. Here
at Blue Hill, a maximum dew point of 79F was calculated around
2:20pm EST (3:20pm EDT) yesterday afternoon. Definitely one of
the highest values measured here. We’ll be researching to see
if this was indeed the highest.
Speaking of thunderstorms, some much needed rainfall finally
fell on the hill with a total of 0.26″ measured. Some of that
was also from some light rain and drizzle that fell overnight
into early this morning. Despite the rain, the monthly deficit
still sits at 0.79″ below normal. The yearly deficit is at 10.30″
below normal. As such severe drought remains.
Several temperature records were set or tied during the heat
wave. Here they are…
8/4: High max of 96F, this beat the old record of 95F set in 1928
8/6: High max of 95F, this tied the record with 1931
High min of 72F, this tied the record with 1918 and 1924
8/7: High max of 96F, this beat the old record of 95F set in 1924
High min of 73F, this tied the record with 2018
8/8: High max of 97F, this beat the old record of 93F set in 1909
and 1949
High min of 75F, this beat the old record of 74F set in 2001
The high so far today is 74F, which is 7 degrees below the normal
maximum of 81F. The low since midnight is 62F, which is 1 degree
below the normal minimum of 63F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Overcast stratus, few stratus fractus all quadrants
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1018.6 mb; 30.08 in. Hg: rising, then more rapidly
Visibility: 25 miles, thin fog
6-hr Max temp: 63F
6-hr Min temp: 62F
24-hr Precip: 0.26 ins.
BHO SA 1155 E25 OVC 25 186/63/63/0605/008/ FEW STFRA ALQDS
THN F ALQDS R-B33E49 WND LGT/ 8/6// 53011 6003/ 70026 10063 20062
10 A.M.
Weather: Overcast stratus
Temperature: 67F; Dew Point: 64F; Relative Humidity: 90%
Wind: E @ 6 kts, wind light
Sea-level pressure: 1018.5 mb; 30.08 in Hg: rising then falling
Visibility: 25 miles, thin fog
3-hr Precip: 0.00 ins.
BHO SA 1455 E10 OVC 25 185/67/64/0806/008/ VSBY 8 E THN F ALQDS
WND LGT/ 8/6// 50001
1 P.M.
Weather: Broken stratocumulus, broken altocumulus
Temperature: 72F, Dew point: 61F; Relative Humidity: 68%
Wind: NNE @ 4 kts, wind light
Sea-level pressure: 1017.8 mb; 30.06 in Hg: falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 63F
6-hr Precip: 0.00 ins.
BHO SA 1755 E20 BKN 150 BKN 35 178/72/61/0204/006/ HAZY WND LGT/
8/570 58007 10074 20063
————————————————————–
SUMMARY FOR TUESDAY, AUGUST 9, 2022
TEMPERATURE (DEGREES F)
MAX…….97 NORMAL…..81
MIN…….63 NORMAL…..64
MEAN……80 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+8
TOTAL DEPARTURE FOR THE MONTH………………..+80 [+8.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE………28 DEPARTURE…….-28
COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY……………15 DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE MONTH…………..150 DEPARTURE…….+80
TOTAL COOLING UNITS FOR THE SEASON………….657 DEPARTURE……+200
TOTAL COOLING UNITS LAST SEASON TO DATE……..428 DEPARTURE……+229
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….33 NW @ 1:52 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..35 @ 1:55 P.M.
DAVIS #2 ………………31 NNW @ 1:53 P.M.
RMY #2 (Instantaneous)…..34 NW @ 1:55 P.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 #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 NNW @ 1:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 @ 1:56 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NNW @ 1:56 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 NW @ 1:56 P.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 #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………11.0 WSW [263 total miles]
VECTOR #2……………….11.7
DAVIS #2………………..11.6 WSW
RMY #2………………….11.6 WSW
RMY #1……….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……..0.26 DEPARTURE…..+0.13
TOTAL PRECIPITATION FOR THE MONTH (JULY)…….0.40 DEPARTURE…..-0.79
TOTAL PRECIPITATION FOR THE YEAR…………..21.59 DEPARTURE….-10.30
————————————————————–
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 85/66/76/+3/0.05/494/57 24 S AERO N/A RMY 26
8/2 93/66/80/+7/0.00/588/68 27 WSW AERO N/A RMY 29
8/3 88/68/78/+5/0.00/836/97 22 NNW AERO N/A RMY 23
8/4 96/68/82/+9/0.00/808/94 29 SSW AERO N/A RMY 31
8/5 96/72/84/+11/0.01/438/51 42 NW AERO N/A RMY 42 TSTM
8/6 95/72/84/+11/0.00/822/96 30 SSW AERO N/A RMY 31
8/7 96/73/85/+12/0.08/589/69 36 SW AERO N/A RMY 38 TSTM
8/8 97/75/86/+14/T/740/87 37 WSW AERO N/A RMY 39
8/9 97/63/80/+8/0.23/…/.. 33 NW AERO N/A RMY 34 TSTM
8/10 The low since midnight is 62F, the daily normal low is 63F
DAILY RECORDS
08/04/2022: NEW HIGH MAXIMUM TEMPERATURE RECORD OF 96F,
PREVIOUS RECORD WAS 95F SET IN 1928.
08/06/2022: TIED RECORD HIGH MAXIMUM OF 95F, ALSO SET IN 1931
TIED RECORD HIGH MINIMUM OF 72F, ALSO SET IN 1918 AND 1924
08/07/2022: NEW HIGH MAXIMUM TEMPERATURE RECORD OF 96F,
PREVIOUS RECORD WAS 95F SET IN 1924
TIED RECORD HIGH MINIMUM OF 73F, ALSO SET IN 2018
08/08/2022: NEW HIGH MAXIMUM TEMPERATURE RECORD OF 97F,
PREVIOUS RECORD WAS 93F SET IN 1909 AND 1949
NEW HIGH MINIMUM TEMPERATURE RECORD OF 75F,
PREVIOUS RECORD WAS 74F SET IN 2001
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976
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
TODAY’S REPORT PREPARED BY: Matt Douglas
