Thursday, May 9, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, MAY 9, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0429E
SUNSET: 1853E
MAINLY CLOUDY, BUT DRY TODAY WITH SEASONABLE TEMPERATURES….
Despite the sky featuring more clouds than sun today, it is
still quite a nice day out there. It feels rather refreshing
as the air is dry and temperatures are near seasonal levels.
The temperature has reached the low to mid 60s with a dew
point that has been holding in the mid 40s. This is very
delightful air, what I’ve coined as Canadian summer!
The wind was gusty for a time this morning out of the northwest.
Speeds were averaging around 15-20mph with gusts over 30mph.
The wind has settled back as we move into the afternoon hours
with speeds averaging around 10mph. The overall average for the
day so far is around 10mph. The peak gust, which occurred just
before 7am, is 33mph.
Visibility has been decent all day with a view of 60-70 miles
being the theme all day.
The maximum temperature so far today is 63F degrees, which is
2 degrees below the normal high of 65F. The minimum temperature
since midnight is 49F degrees, which is 3 degrees above the
normal low of 46F.
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Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, scattered altocumulus,
scattered cirrus
Temperature: 52F; Dew Point: 46F; Relative Humidity: 80%
Wind: NW @ 12G29 kts, peak wind NW 33mph at 6:55 A.M.
Sea-level pressure: 1006.0 mb; 29.71 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 52F
6-hr Min temp: 49F
24-hr Precip: 0.60 inches
BHO SA 1155 22 SCT 85 SCT 250 SCT 60 060/52/46/3216G29/971/
PK WND 3229/55/ 8/551 51020 70060 10052 20049
10 A.M.
Weather: Broken stratocumulus, broken cirrus
Temperature: 59F; Dew Point: 44F; Relative Humidity: 57%
Wind: NNW @ 10G18 kts
Sea-level pressure: 1007.3 mb; 29.75 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E35 BKN 250 BKN 70 073/59/44/3410G18/975/ 8/504 51013
1 P.M.
Weather: Broken stratocumulus, overcast altocumulus/altostratus,
few breaks in overcast distant NW-N
Temperature: 62F; Dew Point: 43F; Relative Humidity: 49%
Wind: NNW @ 7G17 kts
Sea-level pressure: 1007.6 mb; 29.75 in. Hg: rising, then steady
Visibility: 70 miles
6-hr Max temp: 63F
6-hr Min temp: 52F
6-hr Precip: 0.00 inches
BHO SA 1755 E42 BKN 100 OVC 70 076/62/43/3407G17/975/ FEW BINOVC DSNT
NW-N/ 8/57/ 51003 10063 20052
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SUMMARY FOR WEDNESDAY, MAY 8, 2024
TEMPERATURE (DEGREES F)
MAX…….62 NORMAL…..65
MIN…….49 NORMAL…..46
MEAN……56 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+1
TOTAL DEPARTURE FOR THE MONTH…………………….+2 [ 0.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….9 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………85 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………5242 DEPARTURE……-733
TOTAL HEATING UNITS LAST SEASON TO DATE…….5058 DEPARTURE……+184
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……..-1
TOTAL COOLING UNITS FOR THE SEASON……………2 DEPARTURE……..-4
TOTAL COOLING UNITS LAST SEASON TO DATE……….9 DEPARTURE……..-7
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)……….E30 S @ 10:15 A.M.
VECTOR #1 (1-Sec)……….31 S @ 10:15 A.M.
VECTOR #2 (1-Sec)……….30 S @ 10:15 A.M.
DAVIS #1……………….31 S @ 11:07 A.M.
DAVIS #2 ………………36 S @ 10:09 A.M.
RMY #1 (Instantaneous)…..31 S @ 10:17 A.M.
RMY #2 (Instantaneous)…..31 S @ 10:15 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……28 @ 10:15 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SW @ 11:40 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 11:36 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 11:36 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S @ 11:07 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 S @ 10:05 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 SSW @ 11:36 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSW @ 11:36 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 11:28 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.5 SSW [205 total miles]
VECTOR #1……………..9.0
VECTOR #2……………..9.3
DAVIS #1………………8.6 S
DAVIS #2………………9.1 S
RMY #1………………..8.8 S
RMY #2………………..9.4 S
RICHARDS (C5C)…………9.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.60 DEPARTURE…..+0.48
TOTAL PRECIPITATION FOR THE MONTH…………..1.26 DEPARTURE…..+0.26
TOTAL PRECIPITATION FOR THE YEAR (2024)…….26.22 DEPARTURE…..+6.44
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
5/9 The low since midnight is 49F, the daily normal low is 46F.
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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 9
HIGH 93F IN 2000
LOW 31F IN 1947
PRECIP 2.72 INCHES IN 1954
SNOWFALL 5.0 INS IN 1977 (RECORD FOR MAY)
PEAK GUST 70e MPH NE IN 1977
RECORDS FOR MAY 10
HIGH 93F IN 1896
LOW 29F IN 1900
PRECIP 1.85 INS IN 1998
SNOW 2.8 INS 1977 (7.8 INS TOTAL 5/9-5/10 1977)
PEAK GUST 64 MPH S IN 1990
TODAY’S REPORT PREPARED BY: Matt Douglas
