Saturday, March 25, 2023

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

SATURDAY, MARCH 25, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0539E
SUNSET:  1802E

OVERCAST DAY AHEAD OF RAIN ENTERING THE AREA…

Today started with a beautiful sunrise with minimal obstruction
from clouds before 0600E. Shortly after, clouds began to move
quickly into the area with little sky visible at the 7:00 observation.
So far, the weather has been consistent with temperatures
remaining in the mid-high 30’s, overcast conditions, and periodically
gusty wind since about 8 AM. We are expecting rain in the area shortly
as of about 1:00 EST.

The high temperature so far today was 39F, 8 degrees below the normal
maximum temperature for today of 47F. The low since midnight so far is
33F, 3 degrees above our normal minimum temperature of 30F.

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Today’s Observations:

7 A.M.
Weather: Broken altostratus
Temperature: 37F; Dew Point: 30F; Relative Humidity: 75%
Wind: E @ 8G16 kts
Sea-level pressure: 1022.9 mb; 30.21 in. Hg: steady then rising
Visibility: 70 miles
6-hr Max temp: 37F
6-hr Min temp: 33F
24-hr Precip: 0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E150 BKN 70 229/37/30/0908G16/021/ 8/020 53009 10037 20033

10 A.M.
Weather: Overcast altostratus, few stratocumulus in all directions
Temperature: 37F; Dew Point: 29F; Relative Humidity: 72%
Wind: E @ 13G21 kts
Sea-level pressure: 1021.7 mb; 30.17 in. Hg: rising then falling
Visibility: 70 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E150 OVC 70 217/37/29/1013G21/017/ FEW SC ALQDS/
8/42/ 57012

1 P.M.
Weather: Overcast stratus fractus, hazy
Temperature: 38F; Dew Point: 31F; Relative Humidity: 75%
Wind: ESE @ 11 kts
Sea-level pressure: 1018.3mb; 30.07 in. Hg: rising then falling
Visibility: 40 miles
6-hr Max temp: 39F
6-hr Min temp: 37F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0.0 ins.
BHO SA 1755 E60 OVC 40 183/38/31/1111/007/ HAZY/ 8/6// 57034 10039 20037

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SUMMARY FOR FRIDAY, MARCH 24, 2023

TEMPERATURE (DEGREES F)
MAX…….52   NORMAL…..47
MIN…….36   NORMAL…..29
MEAN……44   NORMAL…..38

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+6
TOTAL DEPARTURE FOR THE MONTH…………………+91 [+3.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH…………..642  DEPARTURE…….-93
TOTAL HEATING UNITS FOR THE SEASON…………4362  DEPARTURE……-805
TOTAL HEATING UNITS LAST SEASON TO DATE…….4678  DEPARTURE……-316

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)…………32 WNW @  12:19 A.M.
VECTOR #1 (1-Sec)……….33 WNW @  12:20 A.M.
VECTOR #2 (1-Sec)……….32 WNW @  12:12 A.M.
DAVIS #1……………….31 W   @  12:20 A.M.
DAVIS #2 ………………33 WNW @  12:12 A.M.
RMY #1 (Instantaneous)…..33 WNW @  12:20 A.M.
RMY #2 (Instantaneous)…..34 WNW @  12:42 A.M.
MERLIN…………………22 NW
RICHARDS (C5C) (Inst)……33     @  12:20 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 WNW @  12:10 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 WNW @  12:50 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 WNW @  12:42 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 W   @  12:52 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 NW  @  12:13 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 WNW @  12:50 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 WNW @  12:13 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20     @  12:50 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.4 NW [249 total miles] VECTOR #1……………..10.3
VECTOR #2……………..11.3
DAVIS #1………………10.5 NW
DAVIS #2………………11.0 NNW
RMY #1………………..10.0 NW
RMY #2………………..10.9 NNW
RICHARDS (C5C)…………10.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..5.03 DEPARTURE…..+0.74
TOTAL PRECIPITATION FOR THE YEAR…………..13.68 DEPARTURE…..+0.89

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH……………….10.6 DEPARTURE……-2.0
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-29.6

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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/…/..         33 WNW  VEC1 35 WNW RMY 36
3/22  55/38/47/+10/T/0.0/…/..           24 SSW  VEC1 25 SSW RMY 26
3/23  59/45/52/+14/0.01/0.0/…/..        35 SSW  VEC1 36 SSW RMY 37
3/24  52/36/44/+6/0.00/0.0/…/..         32 WNW  VEC1 33 WNW RMY 33

3/25  The low since midnight is 33F, the daily normal low is 30F

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

RECORDS FOR MARCH 25
HIGH 76 IN 1910
LOW 8 IN 1888, 1956
PRECIP 1.84 INS. IN 1909
SNOWFALL 1.8 INS. IN 2018
PEAK GUST 69 MPH SE IN 1969

RECORDS FOR MARCH 26
HIGH 76 IN 1922, 1949
LOW 6 IN 1960
PRECIP 1.99 INS. IN 1988
SNOWFALL 5.4 INS. IN 2001
PEAK GUST 63 MPH S IN 1970

TODAY’S REPORT PREPARED BY: Samantha Richard