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Saturday, July 13, 2024

July 13, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, JULY 13, 2024 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

SATURDAY, JULY 13, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0420E
SUNSET:  1920E

SHOWERS TO START, BREAKS OF SUN, THEN MORE SHOWERS….

The morning started dry with overcast skies, but it was not long
before showers began moving through. There was a break in the precipitation
and clouds late morning, during which the sun was able to peek through for a
short while. Heading into the early afternoon, showers have returned. So far
today, we have received sixty-two hundredths of an inch of rainfall.

The temperatures this morning held in the low to mid 70s, before rising
to the upper 70s just after the sun came out. The dew point remains high,
holding in the low to mid 70s.

Winds were steady overnight, but have dropped off quite a bit since. The
average speed so far is 11mph, primarily out of the southwest. The peak gust
took place just after midnight, with a value of approximately 25mph.

Visibility has varied a lot today with the showers coming through, but has
ranged from 1/4 of a mile at worst to up to 30 miles at best.

The maximum temperature so far today is 78F, which is 4 degrees
below the normal high of 82F. The minimum temperature since
midnight is 72F, which is 8 degrees above the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus
Temperature: 73F; Dew Point: 72F; Relative Humidity: 96%
Wind: SW @ 9 kts
Sea-level pressure: 1022.5 mb; 30.19 in. Hg: rising, then steady
Visibility: 30 miles, thin fog all quadrants
6-hr Max temp: 73F
6-hr Min temp: 72F
24-hr Precip:  0.05 inches
BHO SA 1155 E8 OVC 30 225/73/72/2209/019/ THN F ALQDS/ 8/5// 51003
70005 10073 20072

10 A.M.
Weather: Light rain shower, fog, sky obscured, vertical visibility 200ft
Temperature: 74F; Dew Point: 74F; Relative Humidity: 100%
Wind: SW @ 7 kts
Sea-level pressure: 1022.1 mb; 30.18 in. Hg: steady, then falling
Visibility: 1/4 mile, fog
3-hr Precip: 0.46 inches
BHO SA 1455 X W2 1/4RW-F 221/74/74/2307/018/ 8//// 58004 6046/

1 P.M.
Weather: Light rain shower, fog, broken stratocumulus,
overcast nimbostratus, few lower stratus fractus
Temperature: 74F; Dew Point: 74F; Relative Humidity: 100%
Wind: SSW @ 9 kts
Sea-level pressure: 1020.3 mb; 30.13 in. Hg: falling unsteadily
Visibility: 5 miles, fog, 2 miles SW-W, 1 mile W-N-NE, 5 miles NE-ESE,
15 miles ESE-SW
6-hr Max temp: 78F
6-hr Min temp: 73F
6-hr Precip: 0.62 inches
BHO SA 1755 E45 BKN 75 OVC 5RW-F 203/74/74/2009/013/ FEW LWR STFRA ALQDS
VSBY 2 SW-W 1 W-N-NE 5 NE-ESE 15 ESE-SW/ 8/72/ 57018 6062/ 10078 20073

————————————————————–

SUMMARY FOR FRIDAY, JULY 12, 2024

TEMPERATURE (DEGREES F)
MAX…….85  NORMAL…..82
MIN…….69  NORMAL…..64
MEAN……77  NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….+48 [+3.8 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……..-3
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE……..-3
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…………..134  DEPARTURE…….+45
TOTAL COOLING UNITS FOR THE SEASON………….312  DEPARTURE…….+84
TOTAL COOLING UNITS LAST SEASON TO DATE……..239  DEPARTURE…….+73

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)……….E32 SW   @   08:10 P.M.
VECTOR #1 (1-Sec)……….32 SW   @   08:10 P.M.
VECTOR #2 (1-Sec)……….34 SSW  @   08:10 P.M.
DAVIS #1……………….31 S    @   08:07 P.M.
DAVIS #2 ………………31 SSW  @   08:10 P.M.
RMY #1 (Instantaneous)…..32 SW   @   08:10 P.M.
RMY #2 (Instantaneous)…..37 SSW  @   08:10 P.M.
MERLIN…………………28 W
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SW   @   08:10 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21      @   08:10 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22      @   08:10 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 SSW  @   08:10 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 SSW  @   08:10 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 SW   @   08:10 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSW  @   08:10 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……11.3 SW [273 total miles] VECTOR #1…………….11.6
VECTOR #2…………….12.1
DAVIS #1……………..11.1 SW
DAVIS #2……………..11.9 SW
RMY #1……………….11.4 SW
RMY #2……………….12.1 SSW
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.05 DEPARTURE…..-0.07
TOTAL PRECIPITATION FOR THE MONTH…………..0.49 DEPARTURE…..-0.84
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.17 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/…/…/..              32 SW  VEC1 32 SW  RMY 32

7/13  The low since midnight is 72F, 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 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996

RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 2.28 INS IN 1948
WIND 110e MPH NW IN 1942 [THUNDERSTORM GUST; RECORD FOR MONTH]

TODAY’S REPORT PREPARED BY: Joshua Polen

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Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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