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Saturday, March 18, 2023

March 18, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, MARCH 18, 2023 ALL TIMES ARE…

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

SATURDAY, MARCH 18, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0551E
SUNSET:  1754E

A SURPRISINGLY GORGEOUS DAY ATOP GREAT BLUE DAY….

Today started off overcast with a good visibility of 70 miles,
and just got better from there! Rainfall totaled 0.01 inches this
morning from a spot shower just after 6 A.M. Lower level clouds
went offshore as a really neat layer of cirrocumulus moved in.
Sunshine has been more abundant than perceived this morning
despite mostly cloudy skies.

Visibility was another significant feature, as we reached
90 miles by the 1 P.M. observation. Quite the day to be the
observer!

The low since midnight is 42F, definitely on the milder side as
the normal low is 27F. That’s a difference of 15 degrees. The
high so far today is 51F, 7 degrees above the normal high of 44F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus with breaks SW-W-NW
Temperature: 43F; Dew Point: 36F; Relative Humidity: 77%
Wind: WNW @ 10G15 kts
Sea-level pressure: 1004.0 mb; 29.64 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 46F
6-hr Min temp: 43F
24-hr Precip: 0.01 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 45 OVC 70 040/43/36/3010G15/964/ FEW BINOVC SW-W-NW/ 8/500
53020 70001 10046 20043

10 A.M.
Weather: Overcast stratocumulus with breaks SW-W-NW
Temperature: 44F; Dew Point: 32F; Relative Humidity: 62%
Wind: NW @ 9G16 kts
Sea-level pressure: 1004.5 mb; 29.66 in. Hg: rising then falling
Visibility: 80 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 45 OVC 80 045/44/32/3109G16/966/ FEW BINOVC SW-W-NW/ 8/500 50005

1 P.M.
Weather: Scattered stratocumlus, overcast cirrocumulus
Temperature: 50F; Dew Point: 31F; Relative Humidity: 47%
Wind: W @ 7G12 kts
Sea-level pressure: 1003.8 mb; 29.63 in. Hg: falling, then more slowly
Visibility: 90 miles, perfect!
6-hr Max temp: 51F
6-hr Min temp: 43F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0.0 ins.
BHO SA 1755 45 SCT 250 BKN 90 038/50/31/2707G12/963/ 8/509 56007 10051
20043

————————————————————–

SUMMARY FOR FRIDAY, MARCH 17, 2023

TEMPERATURE (DEGREES F)
MAX…….52   NORMAL…..44
MIN…….37   NORMAL…..27
MEAN……45   NORMAL…..36

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+9
TOTAL DEPARTURE FOR THE MONTH…………………+48 [+2.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………20  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH…………..489  DEPARTURE…….-49
TOTAL HEATING UNITS FOR THE SEASON…………4209  DEPARTURE……-761
TOTAL HEATING UNITS LAST SEASON TO DATE…….4546  DEPARTURE……-337

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

420C (Official)…………32 S   @  3:02 P.M.
VECTOR #1 (1-Sec)……….36 S   @  2:57 P.M.
VECTOR #2 (1-Sec)……….36 S   @  3:01 P.M.
DAVIS #1……………….39 S   @  2:58 P.M.
DAVIS #2 ………………42 S   @  3:01 P.M.
RMY #1 (Instantaneous)…..36 S   @  2:57 P.M.
RMY #2 (Instantaneous)…..38 S   @  3:01 P.M.
MERLIN…………………33 S
RICHARDS (C5C) (Inst)……35     @  2:58 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 S   @  3:02 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26     @  2:58 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26     @  2:58 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 S   @  2:58 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S   @  3:01 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 S   @  2:58 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 S   @  2:58 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………25     @  2:58 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….11.4 S [274 total miles] VECTOR #1……………..11.7
VECTOR #2……………..12.3
DAVIS #1………………11.2 S
DAVIS #2………………12.1 S
RMY #1………………..11.5 SSE
RMY #2………………..12.4 S
RICHARDS (C5C)…………11.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..5.02 DEPARTURE…..+2.05
TOTAL PRECIPITATION FOR THE YEAR…………..13.67 DEPARTURE…..+2.20

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH……………….10.6 DEPARTURE……+0.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-26.9

————————————————————–

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/…/..          46 NNW  VEC1 49 NNW RMY 53
3/16  49/29/39/+4/0.00/0.0/…/..         30 NW   VEC1 31 NW  RMY 34
3/17  52/37/45/+9/0.00/0.0/…/..         32 S    VEC1 36 S   RMY 36

3/18  The low since midnight is 37F, the daily normal low is 27F

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

RECORDS FOR MARCH 18
HIGH 73 IN 2022
LOW 0 IN 1885
PRECIP 5.61 INS. IN 1968 [RECORD FOR MONTH] SNOWFALL 9.3 INS. IN 1985
PEAK GUST 71e MPH WNW IN 1941

RECORDS FOR MARCH 19
HIGH 77 IN 2012
LOW -2 IN 1967
PRECIP 1.69 INS. IN 1956
SNOWFALL 17.6 INS. IN 1956
PEAK GUST 75e MPH WNW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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