Wednesday, March 29, 2023

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

WEDNESDAY, MARCH 29, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0532E
SUNSET:  1806E

BRILLIANT SUNSHINE, SEASONABLE TEMPERATURES, AND LIGHT WIND…

Quite the nice day ongoing out there today. Plenty of sunshine
has been the theme all day with nothing more than a few high
thin cirrus clouds floating by early this morning. Otherwise
the sky has been devoid of any clouds within the vicinity of
the station.

Temperatures started off rather cold this morning with the low
dropping into the 20s, however they have rebounded nicely
with readings into the upper 40s early this afternoon. This
is pretty much right where we should be for this time of year.

The wind was quite light again today, only averaging around
8mph to this point.

Visibility has been decent with views of 60-70 miles all day.

The high temperature so far today is 49F, which is 1 degree
above the normal maximum temperature for today of 48F. The low
since midnight so far is 29F, which is 2 degrees below our
normal minimum temperature of 31F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrus all quadrants
Temperature: 32F; Dew Point: 24F; Relative Humidity: 71%
Wind: N @ 7 kts
Sea-level pressure: 1021.9 mb; 30.18 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 34F
6-hr Min temp: 29F
24-hr Precip: 0.09 ins.
24-hr Snowfall: Trace
Snow Depth: 0 ins.
BHO SA 1155 CLR 60 219/32/24/3507/018/ FEW CI ALQDS NEW SNW
PST 24 HRS TRACE/ 8/001 53019 70009 10034 20029

10 A.M.
Weather: Clear, few stratocumulus distant ESE-SE and distant WNW,
few cirrus distant E-SE
Temperature: 42F; Dew Point: 26F; Relative Humidity: 53%
Wind: N @ 6 kts, wind light
Sea-level pressure: 1021.8 mb; 30.17 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 60 218/42/26/3506/017/ FEW SC DSNT ESE-SE AND
DSNT WNW FEW CI DSNT E-SE WND LGT/ 8/501 58001

1 P.M.
Weather: Clear, few stratocumulus distant ESE-SSW, few cirrus
distant SW-NW-N
Temperature: 48F; Dew Point: 22F; Relative Humidity: 35%
Wind: W @ 4 kts, wind light and variable
Sea-level pressure: 1019.1mb; 30.09 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 49F
6-hr Min temp: 32F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 70 191/48/22/2804/009/ FEW SC DSNT ESE-SSW
FEW CI DSNT SW-NW-N WND L/V/ 8/501 58027 10049 20032

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SUMMARY FOR TUESDAY, MARCH 28, 2023

TEMPERATURE (DEGREES F)
MAX…….44   NORMAL…..48
MIN…….35   NORMAL…..31
MEAN……40   NORMAL…..39

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH………………..+107 [+3.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………25  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………..731  DEPARTURE……-109
TOTAL HEATING UNITS FOR THE SEASON…………4451  DEPARTURE……-821
TOTAL HEATING UNITS LAST SEASON TO DATE…….4780  DEPARTURE……-329

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,3
420C, Contacting, Merlin and Richards are all Main Tower.

420C (Official)…………17 NW  @   3:23 P.M.
VECTOR #1 (1-Sec)……….17 NW  @   3:22 P.M.
VECTOR #2 (1-Sec)……….19 NNW @   3:22 P.M.
DAVIS #1……………….17 WNW @   3:23 P.M.
DAVIS #2 ………………16 N   @   3:22 P.M.
RMY #1 (Instantaneous)…..18 NW  @   3:24 P.M.
RMY #2 (Instantaneous)…..19 NNW @   3:22 P.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……18     @   3:23 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 WNW @   3:29 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13     @   3:24 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12     @   5:20 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 NW  @   3:24 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 NNW @   5:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 NW  @   3:24 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..12 NW  @   5:20 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14     @   3:24 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……. 5.5 N [132 total miles] VECTOR #1…………….. 5.9
VECTOR #2…………….. 6.1
DAVIS #1……………… 5.4 NNW
DAVIS #2……………… 5.6 N
RMY #1……………….. 5.8 N
RMY #2……………….. 6.1 N
RICHARDS (C5C)………… 6.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..5.85 DEPARTURE…..+0.84
TOTAL PRECIPITATION FOR THE YEAR…………..14.50 DEPARTURE…..+0.99

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH……………….10.6 DEPARTURE……-3.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-31.3

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PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
VEC1: Vector #1 1-second gust
RMY:  R.M. Young wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

3/1   43/27/35/+4/0.00/0.0/425/63         20 NW   VEC1 21 SE  RMY 21
3/2   40/34/37/+5/0.31/0.0/000/00         35 NW   VEC1 36 NW  RMY 39
3/3   44/29/37/+5/0.01/0.1/462/68         33 NW   VEC1 34 NW  RMY 36
3/4   33/28/31/-1/0.82/3.3/000/00         48 E    VEC1 49 NE  RMY 52
3/5   41/25/33/+1/0.00/0.0/240/35         35 NW   VEC1 36 NW  RMY 37
3/6   46/31/39/+6/0.00/0.0/571/83         46 WNW  VEC1 48 NW  RMY 51
3/7   38/26/32/-1/T/T/387/56              41 NW   VEC1 42 NW  RMY 46
3/8   44/26/35/+2/T/T/194/28              32 N    VEC1 34 N   RMY 34
3/9   47/32/40/+7/0.00/0.0/473/68         28 NW   VEC1 28 NW  RMY 29
3/10  49/27/38/+4/T/0.0/616/88            18 W    VEC1 18 SE  RMY 17
3/11  36/29/33/-1/0.14/T/000/00           32 NE   VEC1 34 NE  RMY 34
3/12  41/28/35/+1/0.00/0.0/571/81         26 NNE  VEC1 26 NNE RMY 27
3/13  41/32/37/+3/0.52/0.0/000/00         29 E    VEC1 31 E   RMY 33
3/14  39/31/35/0/3.18/6.9/000/00          51 NNE  VEC1 52 NNE RMY 55
3/15  39/30/35/0/0.00/0.0/342/48          46 NNW  VEC1 49 NNW RMY 53
3/16  49/29/39/+4/0.00/0.0/445/62         30 NW   VEC1 31 NW  RMY 34
3/17  52/37/45/+9/T/0.0/036/05            32 S    VEC1 36 S   RMY 36
3/18  52/36/44/+8/0.01/0.0/376/52         30 WNW  VEC1 31 WNW RMY 31
3/19  38/26/32/-4/0.00/0.0/682/94         47 WNW  VEC1 46 WNW RMY 46
3/20  51/25/38/+1/0.00/0.0/706/97         32 WSW  VEC1 34 WSW RMY 35
3/21  58/32/45/+8/0.00/0.0/636/87         33 WNW  VEC1 35 WNW RMY 36
3/22  55/38/47/+10/T/0.0/617/84           24 SSW  VEC1 25 SSW RMY 26
3/23  59/45/52/+14/0.01/0.0/044/06        35 SSW  VEC1 36 SSW RMY 37
3/24  52/36/44/+6/0.00/0.0/311/42         32 WNW  VEC1 33 WNW RMY 33
3/25 39/33/36/-2/0.17/T/015/02 35 ESE  VEC1 38 ESE RMY 37
3/26  57/39/48/+9/T/0.00/597/80           41 WNW  VEC1 44 WNW RMY 46
3/27  58/35/47/+8/0.41/0.0/516/69         18 E    VEC1 21 E   RMY 20
3/28  44/35/40/+1/0.24/T/090/12           17 NW   VEC1 17 NW  RMY 18

3/29  The low since midnight is 29F, the daily normal low is 31F

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

RECORDS FOR MARCH 29
HIGH 85 IN 1945
LOW -2 IN 1923
PRECIP 2.78 INS. IN 1984
SNOWFALL 13.5 INS. IN 1984
PEAK GUST 95 MPH ENE IN 1984

RECORDS FOR MARCH 30
HIGH 83 IN 1977
LOW 10 IN 1887
PRECIP 2.92 INS. IN 2010
SNOWFALL 3.9 INS. IN 1957
PEAK GUST 60 MPH NW IN 1999

TODAY’S REPORT PREPARED BY: Matt Douglas