Saturday, May 7, 2022

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

SATURDAY, MAY 7, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0432E
SUNSET:  1850E

MOSTLY CLOUDY WITH VERY WINDY CONDITIONS ATOP GREAT BLUE
HILL….

We observed a limited visibility of 45 miles at most due
to a distant, thin fog. Skies were mostly cloudy with
some breaks being observed at the 1 P.M. observation.

The main feature of the day was the chilly north-easterly
wind that was 20 mph on average with a max gust around
40 mph. Conditions were dry for the whole observation
period.

The high so far today is 49F, which is 16 degrees below the
normal maximum of 65F. The low since midnight is 43F, which
is 3 degrees below the normal minimum of 46F.

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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%

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Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 43F; Dew Point: 39F; Relative Humidity: 85%
Wind: ESE @ 18G33 kts, peak of 45 mph E at 6:08 A.M.
Sea-level pressure: 1013.7 mb; 29.93 in. Hg: rising, then
more slowly
Visibility: 25 miles, thin fog
6-hr Max temp: 49F
6-hr Min temp: 43F
24-hr Precip:  0.00 ins.
BHO SA 1155 20 OVC 25 137/43/39/0618G33/993/ THN F ALQDS
PK WND 0939/08/ 8/6// 51021 10049 20043

10 A.M.
Weather: Scattered cumulus, broken altocumulus, overcast
cirrostratus
Temperature: 45F; Dew Point: 34F; Relative Humidity: 64%
Wind: ENE @ 21G32 kts, peak of 41 mph ENE at 09:33 A.M.
Sea-level pressure: 1015.8 mb; 29.99 in Hg: rising steadily
Visibility: 40 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 20 SCT 150 BKN 220 OVC 40 158/45/34/0721G32/999/
PK WND 0736/33/ 8/877 52021

1 P.M.
Weather: Scattered stratocumulus and altocumulus, overcast
cirrostratus with breaks overhead
Temperature: 45F, Dew point: 34F; Relative Humidity: 65%
Wind: ENE @ 19G36 kts, peak of 37 mph ENE at 12:43 P.M.
Sea-level pressure: 1016.7 mb; 30.02 in Hg, falling, then
rising
Visibility: 45 miles
6-hr Max temp: 49F
6-hr Min temp: 43F
6-hr Precip:  0.00 ins.
BHO SA 1755 20 SCT 150 SCT 220 OVC 45 167/45/34/0719G36/002/
BINOVC OVHD PK WND 0732/43/ 8/857 51009 10049 20043

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SUMMARY FOR FRIDAY, MAY 6, 2022

TEMPERATURE (DEGREES F)
MAX…….63     NORMAL…..64
MIN…….49     NORMAL…..45
MEAN……56     NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….+1
TOTAL DEPARTURE FOR THE MONTH……………….-7 [-1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………..9  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH………….72  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE SEASON……….5436  DEPARTURE……-519
TOTAL HEATING UNITS LAST SEASON TO DATE…..5413  DEPARTURE…….+23

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………..0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON………….0  DEPARTURE……..-5
TOTAL COOLING UNITS LAST SEASON TO DATE……..0  DEPARTURE………0

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….20 S   @  6:00 P.M.
AEROVANE……………….18 S   @  5:59 P.M.
VECTOR #2 (Instantaneous)..21     @  6:00 P.M.
DAVIS #2 ………………25 S   @  6:01 P.M.
RMY #2 (Instantaneous)…..21 S   @  6:00 P.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 S   @  6:00 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15     @  6:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S   @  6:01 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 S   @  6:01 P.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…….. 7.3 S [174 total miles] VECTOR #2……………… 8.0
DAVIS #2………………. 7.9 SE
RMY #2………………… 8.0 SE
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…….0.00  DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH………….0.58  DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE YEAR………….16.86  DEPARTURE…..-2.68

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  52/45/49/-5/…./…/..             19 NW  AERO 18 SE  RMY 19
5/05  70/46/58/+3/0.00/…/..             23 NNW AERO 21 NNW RMY 23
5/06  63/49/56/+1/0.00/…/..             20 S   AERO 18 S   RMY 21

5/07  The low since midnight is 43F, the daily normal low is 46F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR MAY 7
HIGH 93F IN 1930
LOW 33F IN 1970
PRECIP 1.19 INCHES IN 2005
SNOWFALL TRACE IN 1967
PEAK GUST 66e MPH WNW IN 1940

RECORDS FOR MAY 8
HIGH 89F IN 2000
LOW 29F IN 1956
PRECIP 1.48 INCHES IN 1886
SNOWFALL TRACE IN 1898, 1947
PEAK GUST 68e MPH NNW IN 1943

TODAY’S REPORT PREPARED BY: Benjamin Turner