Wednesday, July 31, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JULY 31, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0436E
SUNSET: 1904E
MAINLY CLOUDY, WARM, AND VERY HUMID WITH SCATTERED SHOWERS….
Clouds have been dominating for the most part, but peeks of sun
have occurred here and there as well. Scattered showers have
developed and have been moving through the area. One such shower
passed over the Hill just after the 10am observation leaving
0.02″ of water in the rain gauge. Additional showers and even
a thunderstorm are expected through the balance of the afternoon.
Temperatures have warmed into the low-mid 80s by early this
afternoon with humidity holding near oppressive levels. The dew
point has been in the low to mid 70s all day. So there is plenty
of available moisture for some showers and thunderstorms to
produce locally heavy rainfall.
The wind has been on the busy side again today with the south-
southwest flow averaging at around 15mph for the day so far.
Frequent gusts of 25-35mph have been occurring most of the day.
The peak gust for today so far is 45mph which occurred during the
1pm observation.
Visibility has been limited all day to mainly around 20-30 miles,
except occasionally lower due to passing rain showers.
The maximum temperature so far today is 83F, which is 1 degree
above the normal high of 82F. The minimum temperature since midnight
is 71F, which is 9 degrees above the normal low of 62F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratus fractus, overcast stratocumulus, few breaks
in overcast all quadrants
Temperature: 75F; Dew Point: 72F; Relative Humidity: 92%
Wind: SSW @ 12G20 kts
Sea-level pressure: 1015.7 mb; 29.99 in. Hg: steady, then rising
Visibility: 20 miles, thin fog
6-hr Max temp: 75F
6-hr Min temp: 71F
24-hr Precip: Trace
BHO SA 1155 E9 BKN 20 OVC 20 157/75/72/2012G20/999/ FEW BINOVC ALQDS
THN F ALQDS/ 8/7// 53002 6000/ 70000 10075 20071
10 A.M.
Weather: Broken cumulus, broken altocumulus, thin broken cirrus,
few towering cumulus all quadrants, rain showers in vicinity of
station WNW-NNW and E-SE, virga all quadrants
Temperature: 80F; Dew Point: 73F; Relative Humidity: 79%
Wind: S @ 14G22 kts
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: falling, then more slowly
Visibility: 20 miles, 7 miles WNW-NNW, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E37 BKN 85 BKN 250 -BKN 20 146/80/73/1914G22/996/
TCU ALQDS RW VCNTY WNW-NNW AND E-SE VIRGA ALQDS VSBY 7 WNW-NNW
HAZY/ 8/251 56011
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, scattered
cirrostratus, thin broken cirrus, few lower cumulus fractus all
quadrants
Temperature: 82F; Dew Point: 72F; Relative Humidity: 71%
Wind: S @ 23G39 kts, peak wind S 45 mph at 12:52 P.M.
Sea-level pressure: 1013.3 mb; 29.92 in. Hg: falling, then steady
Visibility: 30 miles, hazy
6-hr Max temp: 83F
6-hr Min temp: 75F
6-hr Precip: 0.02 inches
BHO SA 1755 25 SCT 85 SCT 200 SCT E250 -BKN 30 133/82/72/1923G39/992/
FEW LWR CUFRA ALQDS HAZY PK WND 1939/52/ 8/256 56013 6002/ 10083 20075
————————————————————–
SUMMARY FOR TUESDAY, JULY 30, 2024
TEMPERATURE (DEGREES F)
MAX…….87 NORMAL…..82
MIN…….67 NORMAL…..64
MEAN……77 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….+77 [+2.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-7
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………12 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH…………..307 DEPARTURE…….+67
TOTAL COOLING UNITS FOR THE SEASON………….485 DEPARTURE……+106
TOTAL COOLING UNITS LAST SEASON TO DATE……..417 DEPARTURE…….+68
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E29 SW @ 04:54 P.M.
VECTOR #1 (1-Sec)……….29 SW @ 01:16 P.M.
VECTOR #2 (1-Sec)……….30 SSW @ 01:45 P.M.
DAVIS #1……………….33 S @ 01:45 P.M.
DAVIS #2 ………………34 S @ 01:47 P.M.
RMY #1 (Instantaneous)…..30 SW @ 04:44 P.M.
RMY #2 (Instantaneous)…..31 SSW @ 09:23 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 SW @ 04:56 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 01:46 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 04:44 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 SSW @ 01:46 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 S @ 06:31 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 SW @ 01:17 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SSW @ 04:44 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.5 SSW [347 total miles]
VECTOR #1…………….14.4
VECTOR #2…………….15.5
DAVIS #1……………..14.1 SSW
DAVIS #2……………..15.8 SSW
RMY #1……………….14.1 SSW
RMY #2……………….15.7 SSW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..2.51 DEPARTURE…..-0.84
TOTAL PRECIPITATION FOR THE YEAR (2024)…….38.19 DEPARTURE…..+7.61
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
7/1 77/63/70/-1/0.07/722/79 29 N VEC1 27 N RMY 28 TSTM
7/2 80/60/70/-1/0.00/886/97 20 N VEC1 20 N RMY 19
7/3 84/62/73/+1/0.00/856/94 25 S VEC1 25 S RMY 26
7/4 85/62/74/+2/0.04/392/43 28 SSW VEC1 28 SSW RMY 28
7/5 84/68/76/+4/0.22/146/16 29 SSW VEC1 29 SSW RMY 29
7/6 77/71/74/+2/0.10/009/01 31 SW VEC1 33 SSW RMY 33
7/7 88/72/80/+8/0.00/345/38 15 SW VEC1 15 SW RMY 14
7/8 91/71/81/+9/0.00/780/86 17 NW VEC1 18 NW RMY 18
7/9 88/72/80/+7/T/534/59 26 SSW VEC1 27 SSW RMY 29
7/10 88/72/80/+7/0.00/552/61 38 SSW VEC1 37 SSW RMY 38
7/11 87/71/79/+6/0.01/470/52 41 SSW VEC1 40 SSW RMY 41
7/12 85/69/77/+4/0.05/478/53 32 SW VEC1 32 SW RMY 32
7/13 80/72/76/+3/0.64/234/26 28 SW VEC1 25 SW RMY 26
7/14 88/69/79/+6/0.00/809/90 18 SW VEC1 18 SW RMY 19
7/15 92/70/81/+8/0.07/539/60 28 WSW VEC1 27 WSW RMY 28 TSTM
7/16 92/72/82/+9/T/797/89 33 SW VEC1 34 SW RMY 34
7/17 89/71/80/+7/0.37/599/67 38 W VEC1 36 W RMY 37 TSTM
7/18 85/68/77/+4/0.55/429/48 37 W VEC1 37 W RMY 38 TSTM
7/19 82/61/72/-1/0.00/864/97 24 N VEC1 24 NNW RMY 23
7/20 85/63/74/+1/T/747/84 30 WSW VEC1 31 WSW RMY 32
7/21 86/68/77/+4/T/630/71 18 WSW VEC1 18 WSW RMY 18
7/22 83/66/75/+2/T/452/51 24 SSW VEC1 23 SSW RMY 23
7/23 75/65/70/-3/0.02/027/03 17 ESE VEC1 17 SSE RMY 17
7/24 70/64/67/-6/0.09/009/01 16 ESE VEC1 16 ESE RMY 15
7/25 80/64/72/-1/0.12/…/.. 28 WNW VEC1 28 WNW RMY 29 TSTM
7/26 83/59/71/-2/0.00/…/.. 25 N VEC1 25 N RMY 26
7/27 84/63/74/+1/0.00/…/.. 17 SE VEC1 17 SE RMY 16
7/28 82/62/72/-1/0.04/…/.. 18 ESE VEC1 18 SE RMY 18
7/29 73/61/67/-6/0.12/…/.. 21 S VEC1 21 SSE RMY 20
7/30 87/67/77/+4/0.00/…/.. 29 SW VEC1 29 SW RMY 30
7/31 The low since midnight is 71F, the daily normal low is 64F.
————————————————————–
JULY DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 31
HIGH 95F IN 1917
LOW 50F IN 1895
PRECIP 1.34 INS IN 1892
PEAK GUST 43e MPH WNW SW IN 1953, 43 SW IN 1971
RECORDS FOR AUGUST 1
HIGH 97F IN 1917
LOW 49F IN 1891
PRECIP 3.61 INCHES IN 1927
PEAK GUST 41 MPH NNW IN 1985
TODAY’S REPORT PREPARED BY: Matt Douglas
