Tuesday, July 23, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 23, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0428E
SUNSET: 1912E
OVERCAST AND COOLER WITH OFF AND ON LIGHT RAIN SHOWERS….
Today has featured plenty of cloud cover with periods of mainly
very light rain showers occurring off and on since last evening.
Despite the duration, only 0.02″ of rain has been measured. A
good indication that it’s indeed been mainly very light.
Thanks to the overcast skies, temperatures are considerably
cooler today with readings just reaching the mid 70s early this
afternoon. The dew point however remains on the higher side
with values in the mid 60s, so it does still feel muggy out
there today.
The wind has been on the light side once again with an average
speed of around 7mph. The peak gust for the day so far is 17mph,
which occurred just after 2:30am this morning.
Visibility has been limited today of course with the thin fog
and rain shower activity. The view has generally been around
20-30 miles, but has dipped under 10 miles for brief periods
of time in the vicinity of some of the rain showers.
The maximum temperature so far today is 74F, which is 8 degrees
below the normal high of 82F. The minimum temperature since
midnight is 67F, which is 3 degrees above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Overcast altostratus, cumulonimbus distant SE, few lower
stratus fractus distant S-W and distant NNE, few cumulus all quadrants
Temperature: 67F; Dew Point: 66F; Relative Humidity: 96%
Wind: SE @ 6 kts, wind light
Sea-level pressure: 1017.6 mb; 30.05 in. Hg: rising, then steady
Visibility: 25 miles, thin fog
6-hr Max temp: 70F
6-hr Min temp: 67F
24-hr Precip: 0.02 inches
BHO SA 1155 E65 OVC 25 176/67/66/1306/005/ CB DSNT SE FEW LWR STFRA
DSNT S-W AND DSNT NNE FEW CU ALQDS RW-E42 THN F ALQDS WND LGT/ 8/32/
51006 6002/ 70002 10070 20067
10 A.M.
Weather: Overcast nimbostratus, few cumulus/cumulus fractus all
quadrants, very light rain showers
Temperature: 70F; Dew Point: 65F; Relative Humidity: 85%
Wind: ESE @ 7 kts
Sea-level pressure: 1018.4 mb; 30.07 in. Hg: rising, then more rapidly
Visibility: 20 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E55 OVC 20RW- 184/70/65/1107/007/ FEW CU/CUFRA ALQDS
THN F ALQDS RW-B11 PCPN VRY LGT/ 8/22/ 53008 6000/
1 P.M.
Weather: Overcast altostratus, few cumulus/cumulus fractus all
quadrants
Temperature: 73F; Dew Point: 64F; Relative Humidity: 74%
Wind: SE @ 4 kts, wind light
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: rising, then steady
Visibility: 30 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 67F
6-hr Precip: Trace
BHO SA 1755 E60 OVC 30 187/73/64/1304/008/ FEW CU/CUFRA ALQDS
HAZY WND LGT/ 8/22/ 51003 6000/ 10074 20067
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SUMMARY FOR MONDAY, JULY 22, 2024
TEMPERATURE (DEGREES F)
MAX…….83 NORMAL…..82
MIN…….66 NORMAL…..64
MEAN……75 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+2
TOTAL DEPARTURE FOR THE MONTH…………………….+91 [+3.9 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……..-5
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-5
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………10 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH…………..257 DEPARTURE…….+84
TOTAL COOLING UNITS FOR THE SEASON………….435 DEPARTURE……+123
TOTAL COOLING UNITS LAST SEASON TO DATE……..340 DEPARTURE…….+95
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)……….E24 SSW @ 04:00 P.M.
VECTOR #1 (1-Sec)……….23 SSW @ 03:31 P.M.
VECTOR #2 (1-Sec)……….24 SSW @ 03:59 P.M.
DAVIS #1……………….23 S @ 04:00 P.M.
DAVIS #2 ………………26 S @ 04:10 P.M.
RMY #1 (Instantaneous)…..23 SSW @ 03:31 P.M.
RMY #2 (Instantaneous)…..24 SSW @ 03:59 P.M.
MERLIN…………………22 SSW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 SSW @ 04:02 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 04:00 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 04:00 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 S @ 04:00 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 SSW @ 04:00 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SSW @ 04:00 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SSW @ 04:00 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….7.0 SSW [169 total miles]
VECTOR #1……………..7.7
VECTOR #2……………..8.1
DAVIS #1………………7.3 S
DAVIS #2………………7.6 S
RMY #1………………..7.6 SSE
RMY #2………………..8.1 SE
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..2.14 DEPARTURE…..-0.30
TOTAL PRECIPITATION FOR THE YEAR (2024)…….37.82 DEPARTURE…..+8.15
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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/…/.. 18 WSW VEC1 18 WSW RMY 18
7/22 83/66/75/+2/T/…/.. 24 SSW VEC1 23 SSW RMY 23
7/23 The low since midnight is 67F, the daily normal low is 64F.
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JULY DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 23
HIGH 99F IN 1952
LOW 51F IN 1923,1977
PRECIP 1.82 INS IN 1953
PEAK GUST 54e MPH S IN 1946
RECORDS FOR JULY 24
HIGH 99F IN 2022
LOW 49F IN 1893,1912
PRECIP 2.27 INS IN 2008
PEAK GUST 46 MPH NE IN 2009
TODAY’S REPORT PREPARED BY: Matt Douglas
