Wednesday, April 26, 2023

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

WEDNESDAY, APRIL 26, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0447E
SUNSET:  1838E

OVERCAST START TO THE DAY, BUT INCREASING SUNSHINE THIS AFTERNOON…

The sky started off cloudy once again today with a gradual breaking
of the clouds late this morning, leading to an increasing amount
of sunshine this afternoon. Temperatures, which spent most of
the morning in the mid to upper 40s, have responded to the sunshine
with readings getting into the mid 50s. This is still cooler than
normal for this time of year however as an onshore wind helps
to keep the temperature on the lower side.

As mentioned, the wind has been onshore all day, starting the
day on the light side, but increasing a bit this afternoon.
The average speed for the day is only around 6mph. But gusts
of around 20mph have occurred early this afternoon.

Visibility has been limited today with the view of only 35-40
miles being seen, thanks to somewhat high moisture content in
the air.

The high temperature so far today is 55F, which is 6 degrees
below the normal low of 61F. The low since midnight is 43F, this
is 1 degree above the normal low of 42F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, few breaks in overcast all quadrants
Temperature: 45; Dew Point: 40F; Relative Humidity: 82%
Wind: E @ 6 kts, wind light
Sea-level pressure: 1025.6 mb; 30.29 in. Hg: rising, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 45F
6-hr Min temp: 40F
24-hr Precip:  0.11 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E22 OVC 35 256/45/40/0906/029/ FEW BINOVC ALQDS
HAZY WND LGT/ 8/5// 51012 70011 10045 20043

10 A.M.
Weather: Broken cumulus, overcast stratocumulus, few breaks in
overcast all quadrants
Temperature: 46F; Dew Point: 40F; Relative Humidity: 78%
Wind: E @ 7 kts
Sea-level pressure: 1025.6 mb; 30.29 in. Hg: rising then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E25 BKN 35 OVC 40 256/46/40/0807/029/
FEW BINOVC ALQDS HAZY/ 8/8// 50000

1 P.M.
Weather: Broken cumulus, broken stratocumulus
Temperature: 50F; Dew Point: 40F; Relative Humidity: 67%
Wind: ENE @ 8 kts
Sea-level pressure: 1024.4 mb; 30.25 in. Hg: falling, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 54F
6-hr Min temp: 45F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 E33 BKN 55 BKN 40 244/50/40/0608/025/ HAZY/
8/800 56012 10054 20045

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SUMMARY FOR TUESDAY, APRIL 25, 2023

TEMPERATURE (DEGREES F)
MAX…….61   NORMAL…..61
MIN…….42   NORMAL…..42
MEAN……52   NORMAL…..51

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+1
TOTAL DEPARTURE FOR THE MONTH……………….+113 [+4.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………13  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………..368  DEPARTURE……-107
TOTAL HEATING UNITS FOR THE SEASON…………4900  DEPARTURE……-922
TOTAL HEATING UNITS LAST SEASON TO DATE…….5270  DEPARTURE……-370

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….9  DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE SEASON……………9  DEPARTURE……..+7
TOTAL COOLING UNITS LAST SEASON TO DATE……….0  DEPARTURE……..+9

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.

F420C (Official)………..18 NNE @   7:35 P.M.
VECTOR #1 (1-Sec)……….21 NNE @   7:35 P.M.
VECTOR #2 (1-Sec)……….21 ENE @   9:28 P.M.
DAVIS #1……………….20 E   @   9:35 P.M.
DAVIS #2 ………………21 ENE @   7:47 P.M.
RMY #1 (Instantaneous)…..21 NNE @   7:47 P.M.
RMY #2 (Instantaneous)…..21 NE  @   7:47 P.M.
MERLIN…………………19 NE
RICHARDS (C5C) (Inst)……19     @   7:35 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 ENE @   9:19 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15     @   7:51 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15     @   7:46 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 E   @   9:37 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 NE  @   7:51 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 ENE @   9:37 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 NE  @   7:46 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14     @   9:37 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.8 NNW [163 total miles] VECTOR #1……………….7.0
VECTOR #2……………….7.4
DAVIS #1………………..7.0 NE
DAVIS #2………………..7.0 NE
RMY #1………………….6.7 ENE
RMY #2………………….6.9 ENE
RICHARDS (C5C)…………..7.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.11 DEPARTURE…..-0.03
TOTAL PRECIPITATION FOR THE MONTH…………..1.64 DEPARTURE…..-2.40
TOTAL PRECIPITATION FOR THE YEAR…………..16.25 DEPARTURE…..-1.81

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……-2.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-34.7

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PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1   60/39/50/+9/0.39/0.0/145/19         36 SW   VEC1 40 SW  RMY 41
4/2   50/30/40/-1/0.00/0.0/636/83         40 NNW  VEC1 44 NNW RMY 45
4/3   51/28/40/-2/0.00/0.0/737/96         41 SSW  VEC1 46 SSW RMY 46
4/4   62/40/51/+9/0.00/0.0/594/77         26 ENE  VEC1 26 ENE RMY 27
4/5   45/37/41/-2/0.02/0.0/000/00         33 ENE  VEC1 34 ENE RMY 37
4/6   62/37/50/+7/0.02/0.0/155/20         26 NW   VEC1 28 NNW RMY 29
4/7   58/36/47/+3/0.00/0.0/328/42         45 WNW  VEC1 48 WNW RMY 52
4/8   50/29/40/-4/0.00/0.0/767/98         26 NNW  VEC1 29 NNW RMY 31
4/9   54/33/44/0/0.00/0.0/770/98          25 S    VEC1 28 S   RMY 28
4/10  65/33/49/+4/0.00/0.0/772/98         18 WSW  VEC1 19 NW  RMY 20
4/11  75/45/60/+15/0.00/0.0/522/66        37 W    VEC1 37 W   RMY 38
4/12  73/56/65/+19/0.00/0.0/515/65        46 NW   VEC1 49 NW  RMY 52
4/13  88/52/70/+24/0.00/0.0/764/96        25 W    VEC1 26 WNW RMY 27
4/14  88/50/69/+22/0.00/0.0/711/89        24 WNW  VEC1 27 WNW RMY 26
4/15  68/45/57/+10/T/0.0/401/50           20 ENE  VEC1 20 ENE RMY 21
4/16  55/46/51/+4/0.05/0.0/000/00         21 NE   VEC1 22 NE  RMY 21
4/17  55/45/50/+2/0.06/0.0/000/00         17 NE   VEC1 18 ENE RMY 18
4/18  57/45/51/+3/T/0.0/…/..            39 WSW  VEC1 41 WSW RMY 42
4/19  49/37/43/-6/0.00/0.0/…/..         35 WNW  VEC1 36 WNW RMY 40
4/20  64/36/50/+1/0.00/0.0/…/..         23 NW   VEC1 23 NNW RMY 23
4/21  55/42/49/-1/0.00/0.0/…./..        22 E    VEC1 24 SE  RMY 24
4/22 53/42/48/-2/0.27/0.0/…./.. 28 ESE  VEC1 31 ESE RMY 30
4/23  51/45/48/-2/0.72/0.0/…/..         30 SE   VEC1 33 SE  RMY 31
4/24  58/43/51/0/0.00/0.0/…/..          21 WNW  VEC1 22 WNW RMY 22
4/25  61/42/52/+1/0.11/0.0/…/..         18 NNE  VEC1 21 NNE RMY 21

4/26  The low since midnight is 43F, the daily normal low is 42F

DAILY RECORDS

04/12/2023: NEW RECORD HIGH MINIMUM TEMPERATURE OF 56F,
THIS BEATS THE OLD RECORD OF 52F SET IN 1945 AND 1947

04/13/2023: NEW RECORD HIGH MAXIMUM TEMPERATURE OF 88F,
THIS BEATS THE OLD RECORD OF 85F SET IN 1945

04/14/2023: NEW RECORD HIGH MAXIMUM TEMPERATURE OF 88F,
THIS BEATS THE OLD RECORD OF 80F SET IN 1945

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

RECORDS FOR APRIL 26
HIGH 88 IN 2009
LOW 23 IN 1919
PRECIP 1.64 IN. IN 1931
SNOWFALL 1.0 IN. IN 2000
PEAK GUST 53 MPH SSW IN 1996

RECORDS FOR APRIL 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941

TODAY’S REPORT PREPARED BY: Matt Douglas