Monday, May 13, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, MAY 13, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0424E
SUNSET: 1857E
WARMER AND DRY TODAY UNDER A MIX OF SUN AND CLOUDS….
Today has been quite a nice spring day across the area. A mix
of sun and clouds has been the theme all day with temperatures
finally getting back to and even a bit above normal.
Temperatures have risen into the upper 60s early this afternoon
with a dew point holding in the mid 40s. This is a very
delightful combination for any outdoor activities.
The wind was light and variable all morning, even going calm at
times. However it has finally settled out of the southeast early
this afternoon and has increased a bit in speed. The average
speed so far for the day is only around 7mph. The peak gust so
far for the day is 20mph, which occurred right around noon.
Visibility has been decent today, topping out at around 70 miles
during the mid to late morning hours, however it has slipped a
bit this afternoon as haziness has increased, due mainly to
high amounts of pollen in the air. The haze actually has a bit
of a greenish tinge to it, which is typical of pollen induced
haziness.
The maximum temperature so far today is 68F degrees, which is
2 degrees above the normal high of 66F. The minimum temperature
since midnight is 45F degrees, which is 2 degrees below the
normal low of 47F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus castellanus, thin broken cirrus
Temperature: 51F; Dew Point: 45F; Relative Humidity: 81%
Wind: WNW @ 5 kts, wind light
Sea-level pressure: 1018.0 mb; 30.06 in. Hg: rising, then more slowly
Visibility: 65 miles
6-hr Max temp: 51F
6-hr Min temp: 45F
24-hr Precip: Trace
BHO SA 1155 E65 BKN 250 -BKN 65 180/51/45/3005/006/ WND LGT/ 8/081
51014 10051 20045
10 A.M.
Weather: Scattered cumulus, thin scattered cirrus
Temperature: 62F; Dew Point: 45F; Relative Humidity: 52%
Wind: E @ 2 kts, wind light and variable
Sea-level pressure: 1018.0 mb; 30.06 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 50 SCT 250 -SCT 70 180/62/45/0802/006/ WND L/V/ 8/201 58000
1 P.M.
Weather: Broken cumulus
Temperature: 64F; Dew Point: 44F; Relative Humidity: 47%
Wind: ESE @ 9G16 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: falling, then steady
Visibility: 65 miles
6-hr Max temp: 68F
6-hr Min temp: 51F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 65 179/64/44/1209G16/006/ 8/200 56001 10068 20051
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SUMMARY FOR SUNDAY, MAY 12, 2024
TEMPERATURE (DEGREES F)
MAX…….60 NORMAL…..66
MIN…….41 NORMAL…..47
MEAN……51 NORMAL…..57
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-6
TOTAL DEPARTURE FOR THE MONTH……………………-22 [-2.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………..144 DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE SEASON…………5301 DEPARTURE……-712
TOTAL HEATING UNITS LAST SEASON TO DATE…….5073 DEPARTURE……+228
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….2 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON……………2 DEPARTURE……..-6
TOTAL COOLING UNITS LAST SEASON TO DATE………17 DEPARTURE…….-15
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)……….E16 WSW @ 07:42 P.M.
VECTOR #1 (1-Sec)……….15 SW @ 07:45 P.M.
VECTOR #2 (1-Sec)……….16 SW @ 07:44 P.M.
DAVIS #1……………….16 S @ 07:31 P.M.
DAVIS #2 ………………18 S @ 04:01 P.M.
RMY #1 (Instantaneous)…..15 WSW @ 07:42 P.M.
RMY #2 (Instantaneous)…..16 SW @ 07:44 P.M.
MERLIN…………………14 SSE
RICHARDS (C5C) (Inst)……17 @ 07:42 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 SW @ 07:50 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 07:46 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12 @ 07:45 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………11 SW @ 07:46 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 S @ 04:35 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..11 SW @ 07:47 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..12 SW @ 07:44 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………11 @ 07:46 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….5.4 SSW [129 total miles]
VECTOR #1……………..5.9
VECTOR #2……………..6.0
DAVIS #1………………5.5 SSW
DAVIS #2………………5.7 SSW
RMY #1………………..5.8 SSW
RMY #2………………..6.0 SSW
RICHARDS (C5C)…………6.3
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..1.26 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE YEAR (2024)…….26.22 DEPARTURE…..+5.99
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-42.9
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PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
5/1 53/42/48/-5/0.06/0.0/177/21 18 ESE VEC1 18 ESE RMY 18
5/2 69/44/57/+3/0.21/0.0/535/63 35 NE VEC1 36 NE RMY 35 TSTM
5/3 57/44/51/-3/0.02/0.0/408/48 24 NE VEC1 24 NE RMY 25
5/4 55/44/50/-4/0.00/0.0/589/69 22 ENE VEC1 21 NE RMY 21
5/5 51/42/47/-8/0.35/0.0/000/00 21 S VEC1 22 S RMY 21
5/6 75/46/61/+6/0.02/0.0/343/40 20 SW VEC1 18 SW RMY 20
5/7 78/55/67/+12/0.00/0.0/851/99 23 NW VEC1 24 NE RMY 23
5/8 62/49/56/+1/0.60/0.0/078/09 30 S VEC1 31 S RMY 31 TSTM
5/9 63/45/54/-2/0.00/0.0/…/.. 33 NW VEC1 33 NW RMY 34
5/10 56/42/49/-7/0.00/0.0/…/.. 28 ENE VEC1 27 ENE RMY 27
5/11 55/39/47/-9/0.00/0.0/…/.. 26 ENE VEC1 26 NE RMY 27
5/12 60/41/51/-6/T/0.0/…/.. 16 WSW VEC1 15 SW RMY 15
5/13 The low since midnight is 45F, the daily normal low is 47F.
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MAY 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 MAY 13
HIGH 85F IN 1947
LOW 32F IN 2020
PRECIP 2.39 INCHES IN 2006
PEAK GUST 49 MPH NNW IN 1965
RECORDS FOR MAY 14
HIGH 85F IN 1961,2022
LOW 33F IN 1895
PRECIP 1.93 INCHES IN 2006
PEAK GUST 53 MPH S IN 2009
TODAY’S REPORT PREPARED BY: Matt Douglas
