Sunday, May 14, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, MAY 14, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0424E
SUNSET: 1858E
CLEAR SKIES EARLY WITH COOLER TEMPS AND HAZY CONDITIONS
THIS AFTERNOON…
Today has been much cooler but with plenty of sunshine
still. Most of the day cirrus and stratocumulus clouds
have been present, with more cirrus moving into the area
as the day has progressed.
The wind has remained steady today with an average of only
about 9 mph. The highest peak gust so far on the hill has
been around 25 mph. Winds have mostly been out of the Northwest.
Visibility has been about 55-60 miles today, with hazy
conditions moving in during the afternoon. The haziness is more
than likely to do with the pollen in the air.
The high so far today was 63F, which is 3 degrees below our
normal max temperature of 66F. Our low since midnight was 47F,
which is our normal low temperature for the day.
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Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, few stratocumulus E-SSW
Temperature: 52F; Dew Point: 34F; Relative Humidity: 48%
Wind: NNW @ 8 kts
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then rising
Visibility: 60 miles
6-hr Max temp: 54F
6-hr Min temp: 47F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 -SCT 60 227/52/34/3408/020/ FEW SC E-SSW/ 8/501
51010 10054 20047
10 A.M.
Weather: Thin broken cirrus, few stratocumulus E-SSW
Temperature: 58F; Dew Point: 34F; Relative Humidity: 39%
Wind: NW @ 9 kts
Sea-level pressure: 1021.9 mb; 30.18 in. Hg: rising then falling
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 -BKN 60 219/58/34/3109/018/ FEW SC E-SSW/ 8/501
58008
1 P.M.
Weather: Thin broken cirrus, few stratocumulus distant, all quadrants
Temperature: 63F; Dew Point: 33F; Relative Humidity: 31%
Wind: NW @ 8 kts
Sea-level pressure: 1020.6 mb; 30.14 in. Hg: falling, then more slowly
Visibility: 55 miles, hazy
6-hr Max temp: 63F
6-hr Min temp: 52F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 -BKN 55 206/63/33/3208/014/ FEW SC DSNT ALQDS
HAZY/ 8/504 56013 10063 20052
————————————————————–
SUMMARY FOR SATURDAY, MAY 13, 2023
TEMPERATURE (DEGREES F)
MAX…….81 NORMAL…..66
MIN…….58 NORMAL…..47
MEAN……70 NORMAL…..57
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+13
TOTAL DEPARTURE FOR THE MONTH………………..+39 [+2.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH……………92 DEPARTURE…….-43
TOTAL HEATING UNITS FOR THE SEASON…………5063 DEPARTURE……-959
TOTAL HEATING UNITS LAST SEASON TO DATE…….5528 DEPARTURE……-465
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….5 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………13 DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE SEASON…………..22 DEPARTURE…….+13
TOTAL COOLING UNITS LAST SEASON TO DATE……….4 DEPARTURE…….+18
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)……….E28 NNW @ 03:23 P.M.
VECTOR #1 (1-Sec)……….30 NNW @ 03:23 P.M.
VECTOR #2 (1-Sec)……….35 NNW @ 03:26 P.M.
DAVIS #1……………….M
DAVIS #2 ………………M
RMY #1 (Instantaneous)…..35 NNW @ 03:23 P.M.
RMY #2 (Instantaneous)…..34 NNW @ 03:26 P.M.
MERLIN…………………30 NNW
RICHARDS (C5C) (Inst)……34 @ 03:23 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 NW @ 04:06 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 04:07 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 12:35 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………M
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 WNW @ 11:12 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 WNW @ 11:13 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………23 @ 11:12 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………10.9 NNW [261 total miles]
VECTOR #1……………….10.8
VECTOR #2……………….11.3
DAVIS #1………………..M
DAVIS #2………………..M
RMY #1………………….10.5 NW
RMY #2………………….11.1 NNW
RICHARDS (C5C)…………..11.0
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.45 DEPARTURE…..-1.11
TOTAL PRECIPITATION FOR THE YEAR…………..18.65 DEPARTURE…..-1.69
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 (2022-2023)……34.9 DEPARTURE…..-34.8
————————————————————–
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
5/1 63/45/54/+1/0.04/0.0/540/64 44 SSE VEC1 46 SSE RMY 48
5/2 57/43/50/-4/0.22/0.0/144/17 33 S VEC1 34 S RMY 35
5/3 55/42/49/-5/0.01/0.0/093/11 25 E VEC1 25 E RMY 25
5/4 45/40/43/-11/0.07/0.0/009/01 29 NE VEC1 29 NE RMY 29
5/5 59/43/51/-4/0.07/0.0/367/43 18 NE VEC1 19 NE RMY 19
5/6 74/43/59/+4/0.00/0.0/847/99 25 NW VEC1 26 NW RMY 26
5/7 78/52/65/+10/0.01/0.0/…/.. 26 WNW VEC1 27 W RMY 28
5/8 74/49/62/+7/0.03/0.0/…/.. 32 NW VEC1 33 NW RMY 35
5/9 60/45/53/-3/0.00/0.0/…/.. 24 NE VEC1 25 NE RMY 25
5/10 72/51/62/+6/0.00/0.0/…/.. 25 WSW VEC1 26 WSW RMY 26
5/11 81/53/67/+11/T/0.0/…/.. 30 W VEC1 30 W RMY 30
5/12 84/57/71/+14/T/0.0/…/.. 31 WNW VEC1 35 WNW RMY 34
5/13 81/58/70/+13/0/0.0/…/.. 28 NNW VEC1 30 NNW RMY 35
5/14 The low since midnight is 47F, the daily normal low is 47F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR MAY 15
HIGH 93F IN 1900
LOW 36F IN 1947,1985
PRECIP 1.63 INCHES IN 1978
PEAK GUST 53e MPH NE IN 1978, W 2002
TODAY’S REPORT PREPARED BY: Amanda Joly
