Tuesday, July 25, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 25, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0430E
SUNSET: 1911E
WARM AND HUMID WITH BUILDING CONVECTIVE CLOUDS THIS AFTERNOON…
Early morning clouds and fog burned off rather quickly with a
period of sunshine taking it’s place. However, the clear sky
was short-lived as cumulus clouds quickly started to develop.
These cumulus have now built into towering cumulus and cumulo-
nimbus this afternoon with thunderstorms firing off to the
west and northwest of the hill at this time.
Temperatures have warmed into the mid 80s early this afternoon,
and with the dew point around 70F, there is plenty of fuel for
any thunderstorms that do develop. Not to mention, it feels
quite sticky out there as well.
The wind has been mainly on the light side today. The average
speed for the day so far is only around 9mph. A peak gust of
around 20mph occurred way back around midnight.
Visibility has been limited thanks to hazy conditions due to
the higher moisture content in the air. The view has been
holding between 20-30 miles, once the fog burned off early
this morning.
The maximum temperature so far today is 85F, this is 3 degrees
above the normal high of 82F. The minimum temperature today is
67F, which is 3 degrees above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus W-WNW
Temperature: 72F; Dew Point: 69F; Relative Humidity: 91%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: rising, then falling
Visibility: 20 miles, thin fog
6-hr Max temp: 72F
6-hr Min temp: 67F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 20 196/72/69/2306/011/ FEW SC ALQDS FEW CI W-WNW
THN F ALQDS WND LGT/ 8/501 50003 10072 20067
10 A.M.
Weather: Broken cumulus
Temperature: 79F; Dew Point: 70F; Relative Humidity: 75%
Wind: SW @ 7 kts
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: rising, then falling
Visibility: 20 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 20 196/79/70/2307/011/ HAZY/ 8/200 50000
1 P.M.
Weather: Broken cumulus, cumulonimbus distant W-NNW, towering
cumulus all quadrants, virga distant W-NW
Temperature: 82F; Dew Point: 69F; Relative Humidity: 65%
Wind: SSW @ 8G15 kts
Sea-level pressure: 1017.8mb; 30.06 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 72F
6-hr Precip: 0.00 inches
BHO SA 1755 E35 BKN 30 178/82/69/2108G15/006/ CB DSNT W-NNW
TCU ALQDS VIRGA DSNT W-NW HAZY/ 8/360 58018 10085 20072
————————————————————–
SUMMARY FOR MONDAY, JULY 24, 2023
TEMPERATURE (DEGREES F)
MAX…….85 NORMAL…..82
MIN…….67 NORMAL…..64
MEAN……76 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+3
TOTAL DEPARTURE FOR THE MONTH…………………+51 [+1.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-6
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………11 DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH…………..233 DEPARTURE…….+43
TOTAL COOLING UNITS FOR THE SEASON………….361 DEPARTURE…….+32
TOTAL COOLING UNITS LAST SEASON TO DATE……..419 DEPARTURE…….-58
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E23 S @ 03:22 P.M.
VECTOR #1 (1-Sec)……….24 S @ 03:22 P.M.
VECTOR #2 (1-Sec)……….24 S @ 03:18 P.M.
DAVIS #1……………….25 S @ 03:56 P.M.
DAVIS #2 ………………29 S @ 03:22 P.M.
RMY #1 (Instantaneous)…..24 S @ 03:26 P.M.
RMY #2 (Instantaneous)…..25 S @ 03:18 P.M.
MERLIN…………………22 S
RICHARDS (C5C) (Inst)……22 @ 03:26 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 SSW @ 04:32 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 04:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 04:57 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 S @ 04:57 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S @ 04:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SSW @ 04:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SSW @ 04:57 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 @ 02:06 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 9.5 SSW [228 total miles]
VECTOR #1………………… 9.7
VECTOR #2…………………10.4
DAVIS #1…………………. 9.4 SW
DAVIS #2………………….10.2 SW
RMY #1…………………… 9.6 SW
RMY #2……………………10.4 SW
RICHARDS (C5C)……………. 9.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..7.09 DEPARTURE…..+4.43
TOTAL PRECIPITATION FOR THE YEAR…………..32.27 DEPARTURE…..+2.38
————————————————————–
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 80/61/71/0/0.00/567/62 17 SSE VEC1 16 SSE RMY 17
7/2 74/63/69/-2/0.34/027/03 35 S VEC1 35 S RMY 35
7/3 79/63/72/-1/0.40/265/29 18 NNW VEC1 18 NNW RMY 17 TSTM
7/4 71/65/68/-4/0.81/000/00 17 NE VEC1 18 NE RMY 17 TSTM
7/5 88/66/77/+5/0.00/720/79 17 S VEC1 16 SE RMY 15
7/6 92/69/81/+9/0.00/683/75 23 SSW VEC1 22 SSW RMY 23
7/7 87/70/78/+6/0.00/763/84 23 SW VEC1 22 SW RMY 23
7/8 84/70/77/+5/0.00/463/51 20 W VEC1 20 W RMY 19
7/9 81/69/75/+2/T/200/22 17 ESE VEC1 18 E RMY 17
7/10 71/66/69/-4/0.68/000/00 22 ESE VEC1 21 ESE RMY 22
7/11 85/62/74/+1/0.00/796/88 24 WNW VEC1 25 WNW RMY 25
7/12 91/70/81/+8/0.00/713/79 21 WSW VEC1 22 SSW RMY 20
7/13 88/67/78/+5/0.13/695/77 35 SSW VEC1 35 SSW RMY 38 TSTM
7/14 78/65/72/-1/0.18/342/38 29 SSW VEC1 32 SSW RMY 32 TSTM
7/15 86/70/78/+5/T/548/61 28 SSW VEC1 30 SSW RMY 29 TSTM
7/16 76/71/74/+1/2.56/000/00 40 S VEC1 41 SSW RMY 48 TSTM
7/17 86/71/79/+6/0.00/699/78 21 WSW VEC1 21 W RMY 23
7/18 84/70/77/+4/0.00/402/45 28 SSW VEC1 28 SSW RMY 27
7/19 83/68/76/+3/0.00/…/.. 23 W VEC1 23 W RMY 22
7/20 82/64/73/+0/0.00/…/.. 17 NNE VEC1 17 SE RMY 18
7/21 79/62/71/-2/1.99/…/.. 30 NW VEC1 31 NW RMY 32 TSTM
7/22 81/64/73/0/0.00/…/.. 15 W VEC1 14 W RMY 16
7/23 85/65/75/+2/0.00/…/.. 21 NW VEC1 20 W RMY 21
7/24 85/67/76/+3/0.00/…/.. 23 S VEC1 24 S RMY 24
7/24 The low since midnight is 67, the daily normal low is 64F
DAILY RECORDS
07/16/2023: NEW RECORD DAILY PRECIPITATION OF 2.56 INCHES;
SURPASSES THE PREVIOUS RECORD OF 0.98 INCHES IN 2014
07/16/2023: RECORD HIGH DAILY MINIMUM TEMPERATURE OF 71F;
TIES THE RECORD OF 71F SET IN 1901, 1958, 1968, AND 2013
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 25
HIGH 96F IN 2016
LOW 51F IN 1901,1953
PRECIP 2.25 INS IN 1990
PEAK GUST 88 MPH NW IN 1972
RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940
TODAY’S REPORT PREPARED BY: Matt Douglas
