Tuesday, April 12, 2022

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

TUESDAY, APRIL 12, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0508E
SUNSET:  1822E

MORNING CLOUDS AND SHOWERS GIVING WAY TO SUNSHINE AND MILD TEMPS….

Clouds were the theme this morning with an area of showers pushing
through as well. 0.06″ of rain was recorded through 1 P.M.

The showers have moved out with skies clearing out nicely leaving
us with plenty of sunshine this afternoon. Temperatures are
quickly responding with readings already into the low 60s.

The wind was a bit busy this morning, but has dropped off early
this afternoon. The average speed for the day so far
is around 13mph with a peak of 28mph back after midnight.

Visibility is improving following the rain, up to 50 miles by the
1 P.M. observation.

The high so far today is 59F, which is 4 degrees above the
normal maximum of 55F. The low since midnight is 46F, which
is 9 degrees above the normal minimum of 37F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, overcast altocumulus/altostratus,
few stratocumulus all quadrants
Temperature: 49F; Dew Point: 38F; Relative Humidity: 65%
Wind: SW @ 10G17 kts
Sea-level pressure: 1013.1 mb; 29.92 in. Hg: falling, then rising
Visibility: 45 miles, hazy
6-hr Max temp: 49F
6-hr Min temp: 46F
24-hr Precip: Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 80 SCT E100 OVC 45 131/49/38/2310G17/992/ FEW SC ALQDS HAZY/
8/57/ 53001 6000/ 70000 10049 20046

10 A.M.
Weather: Overcast nimbostratus, light rain shower
Temperature: 50F; Dew Point: 44F; Relative Humidity: 79%
Wind: WNW @ 10G19 kts
Sea-level pressure: 1014.4 mb; 29.96 in Hg: rising, then more rapidly
Visibility: 20 miles, thin fog
3-hr Precip:  0.01 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E45 OVC 20RW- 144/50/44/2910G19/996/ THN F ALQDS/ 8/02/
53013 6001/

1 P.M.
Weather: Scattered cirrostratus, few stratocumulus all quadrants,
few altocumulus distant NE-SSE, virga distant ESE-SSE
Temperature: 59F, Dew point: 48F; Relative Humidity: 66%
Wind: NW @ 6 kts, wind light
Sea-level pressure: 1014.2 mb; 29.95 in Hg: falling, then rising
Visibility: 50 miles
6-hr Max temp: 59F
6-hr Min temp: 49F
6-hr Precip:  0.06 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 180 SCT 50 142/59/48/3206/995/ FEW SC ALQDS FEW AC DSNT NE-SSE
VIRGA DSNT ESE-SSE WND LGT/ 8/578 55002 6006/ 10059 20049

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SUMMARY FOR MONDAY, APRIL 11, 2022

TEMPERATURE (DEGREES F)
MAX…….62     NORMAL…..54
MIN…….35     NORMAL…..36
MEAN……49     NORMAL…..45

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….+4
TOTAL DEPARTURE FOR THE MONTH………………+37 [+3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………16  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..204  DEPARTURE…….-38
TOTAL HEATING UNITS FOR THE SEASON…………5067  DEPARTURE……-522
TOTAL HEATING UNITS LAST SEASON TO DATE…….5019  DEPARTURE…….+48

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………0
TOTAL COOLING UNITS FOR THE SEASON……………0  DEPARTURE………0
TOTAL COOLING UNITS LAST SEASON TO DATE……….0  DEPARTURE………0

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….31 NNW @  7:08 A.M.
AEROVANE……………….30 NNW @  7:08 A.M.
VECTOR #2 (Instantaneous)..33     @  7:08 A.M.
DAVIS #2 ………………27 NNW @  7:10 A.M.
RMY #2 (Instantaneous)…..31 NNW @  7:08 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………………22 NW  @  7:04 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22     @  7:08 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 NNW @  7:08 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 NNW @  7:08 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…….11.7 WNW [280 total miles] VECTOR #2……………..12.2
DAVIS #2………………12.0 WNW
RMY #2………………..12.1 W
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…..-0.18
TOTAL PRECIPITATION FOR THE MONTH………….1.08  DEPARTURE…..-0.81
TOTAL PRECIPITATION FOR THE YEAR………….14.39  DEPARTURE…..-1.52

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE……-1.8
TOTAL SNOWFALL FOR THE SEASON (2021-2022)…..70.7  DEPARTURE……+2.0

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  The low since midnight is 46F, the daily normal low is 37F

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

RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 9.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978

RECORDS FOR APRIL 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 79 MPH S IN 2020

TODAY’S REPORT PREPARED BY: Matt Douglas