Wednesday, April 20, 2022

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

WEDNESDAY, APRIL 20, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0455E
SUNSET:  1831E

A VERY NICE SPRING DAY SO FAR WITH A CHILLY
WESTERLY BREEZE….

Wind is starting to die down a bit from the 20 mph on
average this morning. Frequent gusts of 30 mph have been
observed for most of the day, but skies are almost clear
save some fair weather cumulus. Visibility is 80 miles
on average as weather conditions remain dry with dew points
below freezing.

Sunshine is abundant, which is a nice complement to the
slight chill. It’s a good day for a hike!

The high so far today is 54F, which is 5 degrees below the
normal maximum of 59F. The low since midnight is 37F, which
is 3 degrees below the normal minimum of 40F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cumulus and cirrostratus
Temperature: 42F; Dew Point: 26F; Relative Humidity: 53%
Wind: WNW @ 20G29 kts, peak wind WNW 37 mph at 6:33 A.M.
Sea-level pressure: 1019.1 mb; 30.09 in. Hg: falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 42F
6-hr Min temp: 37F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 80 191/42/26/3020G29/009/ FEW CU/CS ALQDS PK WND
3032/33/ 8/105 53040 70000 10042 20037

10 A.M.
Weather: Scattered cumulus
Temperature: 49F; Dew Point: 29F; Relative Humidity: 45%
Wind: NW @ 16G29 kts, peak wind NW 35 mph at 9:03 A.M.
Sea-level pressure: 1022.0 mb; 30.18 in Hg: rising, then more
slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 60 SCT 80 220/49/29/3116G29/018/ PK WND 3131/03/
8/100 51029

1 P.M.
Weather: Clear, few cumulus
Temperature: 54F, Dew point: 28F; Relative Humidity: 36%
Wind: NW @ 13G21 kts
Sea-level pressure: 1024.1 mb; 30.25 in Hg: rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 54F
6-hr Min temp: 42F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 80 241/54/28/3113G21/025/ FEW CU ALQDS/ 8/100
51021 10054 20042

————————————————————–

SUMMARY FOR TUESDAY, APRIL 19, 2022

TEMPERATURE (DEGREES F)
MAX…….55     NORMAL…..58
MIN…….39     NORMAL…..39
MEAN……47     NORMAL…..49

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….-2
TOTAL DEPARTURE FOR THE MONTH………………+65 [+3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY………….18  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………318  DEPARTURE…….-67
TOTAL HEATING UNITS FOR THE SEASON……….5181  DEPARTURE……-551
TOTAL HEATING UNITS LAST SEASON TO DATE…..5178  DEPARTURE……..+3

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……..-1
TOTAL COOLING UNITS LAST SEASON TO DATE……..0  DEPARTURE………0

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….55 S   @  8:33 A.M.
AEROVANE……………….53 S   @  8:12 A.M.
VECTOR #2 (Instantaneous)..57     @  8:33 A.M.
DAVIS #2 ………………67 S   @  8:33 A.M.
RMY #2 (Instantaneous)…..57 S   @  8:33 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………………43 S   @  8:35 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..41     @  8:35 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………45 S   @  8:35 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..42 S   @  8:35 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……..22.8 WSW [548 total miles] VECTOR #2………………22.5
DAVIS #2……………….23.0 SSW
RMY #2…………………22.4 SSW
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…..+0.14
TOTAL PRECIPITATION FOR THE MONTH………….2.67  DEPARTURE…..-0.50
TOTAL PRECIPITATION FOR THE YEAR………….15.98  DEPARTURE…..-1.21

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH……………..TRACE  DEPARTURE……-2.5
TOTAL SNOWFALL FOR THE SEASON (2021-2022)…..70.7  DEPARTURE……+1.3

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/…/..         55 S   AERO 53 S   RMY 58

4/20  The low since midnight is 37F, the daily normal low is 40F

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

RECORDS FOR APRIL 20
HIGH 88 IN 1927
LOW 18 IN 1897
PRECIP 1.14 IN 1972
SNOWFALL 2.5 IN. IN 1904, 1972
PEAK GUST 76 MPH WNW IN 1963

RECORDS FOR APRIL 21
HIGH 85 IN 1923
LOW 22 IN 1908
PRECIP 3.18 IN. IN 1991
SNOWFALL 0.8 IN. IN 1947
PEAK GUST 76e MPH NE IN 1940

TODAY’S REPORT PREPARED BY: Benjamin Turner