Thursday, March 25, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, MARCH 25, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0543E
SUNSET: 1801E
SUN BREAKS THROUGH AFTER A THICK MORNING FOG
FOLLOWING SOME OVERNIGHT RAINFALL….
We observed a fog this morning that limited visibility to a
half mile until noontime, but visibility was 15 miles at the
1 P.M. observation. This was after 0.11 inches of rain fell this
morning.
Dry conditions continue to be an issue, so a fire risk persists.
The wind is still light today, with a max gust of around
25 mph this morning. The monthly precipitation departure
stands at -3.24″ and the yearly departure is -3.66″.
The high so far today is 62F, which is 15 degrees above the
normal high of 47F. The low since midnight is 49F, which
is 19 degrees above the daily normal low of 30F.
Today’s Observations:
7 A.M.
Weather: Fog
Temperature: 50F; Dew Point: 50F; Relative Humidity: 100%
Wind: SE @ 7 kts
Sea-level pressure: 30.09 in Hg; rising steadily
Visibility: 1/2 mile, fog
6-hr Max temp: 50F
6-hr Min temp: 49F
24-hr Precip: 0.11 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 X W3 1/2F 189/50/50/1407/009/ 8//// 70011
53013 10050 20049
10 A.M.
Weather: Fog
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: SE @ 7 kts
Sea-level pressure: 30.09 in Hg; rising, then falling
Visibility: 1/2 mile, fog
3-hr Precip: 0.00 ins
3-hr Snow: 0.0 ins.
BHO SA 1455 X W3 1/2F 190/55/55/1807/009/ 8//// 55001
1 P.M.
Weather: Overcast stratus
Temperature: 60F, Dew point: 58F; Relative Humidity: 92%
Wind: SSW @ 5 kts, light
Sea-level pressure: 30.07 in Hg; falling steadily
Visibility: 15 miles, thin fog
6-hr Max temp: 62F
6-hr Min temp: 50F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 10 OVC 15 184/60/58/2105/007/ THN F ALQDS WND
LGT/ 8/6// 56006 10062 20050
SUMMARY FOR WEDNESDAY, MARCH 24, 2021
TEMPERATURE (DEGREES F)
MAX…….63 NORMAL…..47
MIN…….44 NORMAL…..29
MEAN……54 NORMAL…..38
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. +16
TOTAL DEPARTURE FOR THE MONTH………………. +58 [+2.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………11 DEPARTURE……-16
TOTAL HEATING UNITS FOR THE MONTH…………..678 DEPARTURE……-59
TOTAL HEATING UNITS FOR THE SEASON…………4723 DEPARTURE…..-581
TOTAL HEATING UNITS LAST SEASON TO DATE…….4706 DEPARTURE……+17
PEAK WIND GUST (MPH):
420C/Official…………..22 SSE @ 11:55 P.M.
AEROVANE (south tower)…..21 SSE @ 11:51 P.M.
ASOS…………………..19 S @ 6:49 P.M.
DAVIS #1……………….20 SSE @ 8:23 P.M.
DAVIS #2 (south tower)…..23 S @ 6:45 P.M.
RMY……………………21 @ 11:55 P.M.
VECTOR…………………21 @ 6:45 P.M.
MERLIN…………………23
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 SSE @ 11:55 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 SE @ 11:58 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 SSE @ 8:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 SE @ 11:51 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..15 S @ 11:54 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..16 @ 11:56 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.5 SSE [203 total miles] ASOS………………….8.8
DAVIS #1………………8.8 S
DAVIS #2………………9.4 S
RMY…………………..8.7 S
VECTOR………………..9.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.11 DEPARTURE….-0.08
ASOS………….0.11
TOTAL PRECIPITATION FOR THE MONTH………….1.05 DEPARTURE….-3.24
ASOS………….1.09
TOTAL PRECIPITATION FOR THE YEAR…………..9.05 DEPARTURE….-3.66
ASOS…………9.35
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………. 0.0 DEPARTURE…. -0.3
TOTAL SNOWFALL FOR THE MONTH……………… 0.2 DEPARTURE….-10.5
TOTAL SNOWFALL FOR THE SEASON……………..72.6 DEPARTURE….+15.4
PRELIMINARY CLIMATE SUMMARY FOR MARCH 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
03/01 42/24/33/+2/0.13/T/020/03 69 WNW AERO 78 WNW RMY 78
03/02 27/10/19/-12/T/0.1/679/100 63 WNW AERO 71 WNW RMY 69
03/03 45/19/32/0/0.00/0.0/375/55 30 W AERO 30 W RMY 34
03/04 38/22/30/-2/0.00/0.0/520/76 46 NW AERO 51 NW RMY 53
03/05 31/18/25/-7/0.00/0.0/549/80 39 WNW AERO 44 NW RMY 45
03/06 33/15/24/-8/0.00/0.0/675/98 28 WNW AERO 29 WNW RMY 30
03/07 35/15/25/-8/0.00/0.0/686/99 21 NW AERO 22 NW RMY 23
03/08 38/19/29/-4/T/T/389/56 20 NW AERO 20 NW RMY 21
03/09 56/30/43/+10/T/T/…/.. 32 WNW AERO 35 WNW RMY 37
03/10 54/32/43/+10/0.00/0.0/…/.. 29 SSW AERO 29 SSW RMY 31
03/11 71/35/53/+19/0.00/0.0/…/.. 41 SSW AERO 43 SSW RMY 46
03/12 62/42/52/+18/0.00/0.0/…/.. 52 WNW AERO 59 WNW RMY 57
03/13 46/27/37/+3/0.00/0.0/…/.. 53 WNW AERO 59 WNW RMY 57
03/14 45/19/32/-3/0.01/0.1/…/.. 51 WNW AERO 58 NW RMY 58
03/15 27/12/20/-15/0.00/0.0/…/.. 48 NW AERO 47 NW RMY 54
03/16 37/13/25/-10/0.00/0.0/…/.. 22 NNW AERO 22 NNW RMY 23
03/17 52/27/40/+4/0.00/0.0/…/.. 28 S AERO 25 S RMY 29
03/18 46/34/40/+4/0.80/T/…/.. 38 NE AERO 40 NE RMY 42
03/19 39/26/33/-3/T/T/…/.. 37 N AERO 38 N RMY 41
03/20 58/24/41/+4/0.00/0.0/…/.. 23 W AERO 23 W RMY 27
03/21 62/39/51/+14/0.00/0.0/…/.. 22 S AERO 23 S RMY 25
03/22 62/36/49/+12/0.00/0.0/…/.. 21 S AERO 18 S RMY 22
03/23 65/38/52/+14/0.00/0.0/…/.. 22 ESE AERO 18 SE RMY 21
03/24 63/44/54/+16/…./0.0/…/.. 22 SSE AERO 21 SSE RMY 21
03/25 The low since midnight is 49F, 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: Benjamin Turner
