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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, MAY [THE] 4th [BE WITH YOU], 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0435E
SUNSET: 1847E
SOME LIGHT LIGHT RAIN, CLOUDY AND COOL AGAIN….
An overcast sky with occasional light rain has been
the theme here today. 0.01″ was deposited in the
gauge by 10a with an additional 0.13″ by 1pm.
With the lack of sunshine, the mercury is struggling
to rise. It took until 10a to notch the 50 degree mark
and only a mere 2 degree increase since then by early
afternoon.
Speaking of temperatures, the 10-day average temperature
departure is -4.6F…a notable turnaround from the very
mild start to spring!
Visibility is limited today due to a low ceiling, rain, and
fog. Max distance was witnessed at the 7a observation at
40 miles,but has since slipped to a measly 1/8 mile.
Winds are light and variable with the direction mainly out
of the SE. In fact, we saw calm winds for 2 consecutive
hours from 10a to 12p.
The high so far today is 52F, which is 12 degrees below the
normal maximum of 64F. The low since midnight is 45F, which
equals the normal minimum of 45F.
————————————————————–
PRELIMINARY STATS FOR APRIL 2022
TEMPERATURE, Deg. F
Avg. Max. 57.5 [+1.2]
Avg. Min. 38.7 [+0.8]
Mean 48.1 [+1.0]
24-hour corrected mean: 47.3
Max. for month: 71F on the 13th
Min. for month: 32F on the 18th
HEATING DEGREE DAYS
Total heating units: 501 [ -39]
Total for the season: 5364 [-523]
Total for last season: 5341
PRECIPITATION, Inches
Total: 2.97 [-1.79]
Greatest in 24 hrs: 0.96 on the 19th
SNOWFALL, Inches
Total: TRACE [-2.8]
Greatest in 24 hrs: TRACE on the 17th
WIND, mph
Avg. uncorrected wind speed: 12.5 mph
Avg. corrected wind speed: 12.9 mph
Prevailing wind direction: NW [20%]
Peak gust and direction: 56 WNW on the 1st
SUNSHINE:
Campbell-Stokes card minutes: 13032 of a possible 23250, or 56%
Astronomical total minutes: 13505 of a possible 24106, or 56%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Overcast Stratus (Virga NNW-SSW)
Temperature: 48F; Dew Point: 44F; Relative Humidity: 86%
Wind: ESE @ 4 kts (wind light)
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: Falling unsteadily
Visibility: 40 miles (20 miles NNW-SSW)
6-hr Max temp: 48F
6-hr Min temp: 45F
24-hr Precip: Trace
BHO SA 1155 20 OVC 40 179/48/44/1104/006/ VIRGA NNW-SSW VSBY 20
NNW-SSW WND LGT/ 8/6// 57006 70000 10048 20045
10 A.M.
Weather: Overcast Nimbostratus w/ Very Light Drizzle & Fog
Temperature: 50F; Dew Point: 48F; Relative Humidity: 93%
Wind: W @ 1 kt (wind light and variable)
Sea-level pressure: 1016.5 mb; 30.02 in Hg: Falling unsteadily
Visibility: 6 miles
3-hr Precip: 0.01 ins.
BHO SA 1455 10 OVC 6L-F 165/50/48/2901/002/ PCPN VRY LGT
WND L/V/ 8/6// 57014 6001/
1 P.M.
Weather: Sky Obscured, Vertical Visibility 200ft, Light drizzle, Fog
Temperature: 51F, Dew point: 51F; Relative Humidity: 100%
Wind: ENE @ 3 kts (wind light)
Sea-level pressure: 1014.2 mb; 29.95 in Hg: Falling unsteadily
Visibility: 1/8 mile
6-hr Max temp: 52F
6-hr Min temp: 48F
6-hr Precip: 0.14 ins.
BHO SA 1755 X W2 1/8L-F 142/51/51/6003/995/ WND LGT/ 8//// 57023
6014/ 10052 20048
————————————————————–
SUMMARY FOR TUESDAY, MAY 3, 2022
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..63
MIN…….43 NORMAL…..44
MEAN……50 NORMAL…..54
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….-4
TOTAL DEPARTURE FOR THE MONTH……………….-6 [-2.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY………….15 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH………….40 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE SEASON……….5404 DEPARTURE……-518
TOTAL HEATING UNITS LAST SEASON TO DATE…..5366 DEPARTURE…….+38
COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………..0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….0 DEPARTURE……..-4
TOTAL COOLING UNITS LAST SEASON TO DATE……..0 DEPARTURE………0
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….23 ENE @ 4:21 A.M.
AEROVANE……………….22 ENE @ 4:21 A.M.
VECTOR #2 (Instantaneous)..24 @ 4:21 A.M.
DAVIS #2 ………………22 ENE @ 4:21 A.M.
RMY #2 (Instantaneous)…..24 ENE @ 4:21 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 ENE @ 4:21 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 5:17 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 ENE @ 8:00 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 ENE @ 5:17 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….. 8.7 NE [208 total miles]
VECTOR #2……………… 9.3
DAVIS #2………………. 9.3 E
RMY #2………………… 9.2 E
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
ASOS…………OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
DAVIS #1……..OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……TRACE DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH………….0.44 DEPARTURE…..+0.07
TOTAL PRECIPITATION FOR THE YEAR………….16.72 DEPARTURE…..-2.43
PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
4/01 57/35/46/+5/0.41/0.0/183/24 56 WNW AERO 55 WNW RMY 58
4/02 52/34/43/+2/0.00/0.0/697/91 45 WNW AERO 43 WNW RMY 47
4/03 51/36/44/+2/0.03/0.0/215/28 23 NE AERO 18 NE RMY 23
4/04 56/35/46/+4/0.02/0.0/610/79 35 NW AERO 30 NW RMY 34
4/05 62/37/50/+7/0.00/0.0/698/90 25 SSW AERO 24 S RMY 25
4/06 44/39/42/-1/0.22/0.0/000/00 33 ENE AERO 32 E RMY 34
4/07 52/38/45/+1/0.06/0.0/000/00 50 ESE AERO 50 ESE RMY 53
4/08 61/42/52/+8/0.24/0.0/470/60 45 ESE AERO 45 SE RMY 47 TSTM
4/09 59/39/49/+5/0.10/0.0/291/37 40 S AERO 40 S RMY 43
4/10 55/35/45/0/T/0.0/560/71 35 NW AERO 32 NW RMY 34
4/11 62/35/49/+4/T/0.0/728/92 31 NNW AERO 30 NNW RMY 31
4/12 68/46/57/+11/0.06/0.0/349/44 32 W AERO 30 W RMY 31
4/13 71/47/59/+13/0.00/0.0/670/84 33 S AERO 31 S RMY 35
4/14 50/43/47/0/0.16/0.0/000/00 19 N AERO 18 N RMY 18
4/15 66/43/55/+8/T/0.0/691/86 37 S AERO 37 S RMY 39
4/16 70/40/55/+8/0.40/0.0/314/39 42 S AERO 53 SSW RMY 45
4/17 48/36/42/-6/0.01/T/461/57 38 N AERO 36 N RMY 39
4/18 55/32/44/-4/0.00/0.0/616/76 35 E AERO 30 E RMY 34
4/19 55/39/47/-2/0.96/0.0/325/40 55 S AERO 53 S RMY 58
4/20 56/37/47/-2/0.00/0.0/808/99 40 WNW AERO 37 WNW RMY 41
4/21 60/40/50/0/T/0.0/541/66 45 SSW AERO 41 SSW RMY 47
4/22 65/46/56/+6/0.00/0.0/699/85 39 WNW AERO 35 WNW RMY 39
4/23 66/40/53/+3/0.00/0.0/577/70 24 NW AERO 22 W RMY 25
4/24 50/40/45/-6/T/0.0/165/20 29 ENE AERO 26 ENE RMY 30
4/25 59/41/50/-1/0.00/0.0/464/56 22 S AERO 21 S RMY 23
4/26 54/42/48/-4/0.24/0.0/000/00 20 SSW AERO 18 S RMY 21
4/27 56/39/48/-4/0.06/0.0/350/42 48 NW AERO 47 NW RMY 48
4/28 53/35/44/-8/0.00/0.0/669/80 45 NNW AERO 45 NW RMY 46
4/29 55/35/45/-8/0.00/0.0/664/79 40 NNW AERO 39 NNW RMY 39
4/30 58/34/46/-7/0.00/0.0/690/82 24 NNW AERO 23 NNW RMY 24
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
5/01 69/40/55/+2/0.00/…/.. 25 SSE AERO 25 SSE RMY 27
5/02 58/42/50/-4/0.21/…/.. 21 NE AERO 19 NE RMY 20
5/03 57/43/50/-4/…/…/.. 23 ENE AERO 22 ENE RMY 24
5/04 The low since midnight is 45F, the daily normal low is 45F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 4
HIGH 90F IN 2001
LOW 27F IN 1911 (RECORD FOR MAY)
PRECIP 1.67 INCHES IN 1893
SNOWFALL 0.1 INCHES IN 1920
PEAK GUST 60 MPH NW IN 1966
RECORDS FOR MAY 5
HIGH 92F IN 1949
LOW 30F IN 1891
PRECIP 2.74 INCHES IN 1922
SNOWFALL 3.0 INCHES IN 1917
PEAK GUST 58 MPH S IN 1966 & 58e MPH SW IN 1976
TODAY’S REPORT PREPARED BY: Andrew Swanson
