Tuesday, March 23, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, MARCH 23, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0544E
SUNSET: 1800E
A NICE DAY AFTER SOME MORNING FOG….
We observed fog this morning that brought visibility down
to only a mile. It broke up around 9 A.M., and we saw
70 miles of visibility for the rest of the day. Mild weather
in the region continues to exist despite partly cloudy skies.
Dry conditions continue to be an issue, so a fire risk persists.
The wind is calmer today, with a max gust of around
20 mph. The monthly precipitation departure
stands at -2.96″ and the yearly departure is -3.38″.
The high so far today is 64F, which is 18 degrees above the
normal high of 46F. The low since midnight is 38F, which
is 9 degrees above the daily normal low of 29F.
Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 44F; Dew Point: 43F; Relative Humidity: 98%
Wind: WNW @ 4 kts, light and variable
Sea-level pressure: 30.33 in Hg; rising steadily
Visibility: 1 mile, fog
6-hr Max temp: 44F
6-hr Min temp: 38F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 10 OVC 1F 271/44/43/3004/033/ WND L/V/ 8/6//
53008 10044 20038
10 A.M.
Weather: Scattered cirrus
Temperature: 57F; Dew Point: 41F; Relative Humidity: 55%
Wind: SW @ 4 kts, light and variable
Sea-level pressure: 30.34 in Hg; rising, then steady
Visibility: 70 miles, thin smoke layer N-NE
3-hr Precip: 0.00 ins
3-hr Snow: 0.0 ins.
BHO SA 1455 250 SCT 70 276/57/41/2504/034/ THN K LYR N-NE
WND L/V/ 8/002 51005
1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 63F, Dew point: 42F; Relative Humidity: 45%
Wind: WSW @ 4 kts, light and variable
Sea-level pressure: 30.31 in Hg; falling steadily
Visibility: 70 miles, thin smoke layer N-NE
6-hr Max temp: 64F
6-hr Min temp: 44F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 40 SCT 250 BKN 70 261/63/42/2504/031/ THN K LYR
N-NE WND L/V/ 8/108 58015 10064 20044
SUMMARY FOR MONDAY, MARCH 22, 2021
TEMPERATURE (DEGREES F)
MAX…….62 NORMAL…..46
MIN…….36 NORMAL…..28
MEAN……49 NORMAL…..37
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. +12
TOTAL DEPARTURE FOR THE MONTH………………. +28 [+1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………16 DEPARTURE……-12
TOTAL HEATING UNITS FOR THE MONTH…………..654 DEPARTURE……-28
TOTAL HEATING UNITS FOR THE SEASON…………4699 DEPARTURE…..-551
TOTAL HEATING UNITS LAST SEASON TO DATE…….4650 DEPARTURE……+49
PEAK WIND GUST (MPH):
420C/Official…………..21 S @ 7:22 P.M.
AEROVANE (south tower)…..18 S @ 7:21 P.M.
ASOS…………………..21 S @ 7:21 P.M.
DAVIS #1……………….21 S @ 7:24 P.M.
DAVIS #2 (south tower)…..23 SSE @ 8:17 P.M.
RMY……………………22 @ 7:21 P.M.
VECTOR…………………22 @ 7:22 P.M.
MERLIN…………………21
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 S @ 7:13 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 S @ 8:46 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 S @ 7:30 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S @ 7:13 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..15 S @ 8:45 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..15 @ 8:45 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.1 S [219 total miles] ASOS………………….9.6
DAVIS #1………………9.0 SSW
DAVIS #2………………9.4 SSW
RMY…………………..9.3 SSW
VECTOR………………..9.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.19
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….0.94 DEPARTURE….-2.96
ASOS………….0.98
TOTAL PRECIPITATION FOR THE YEAR…………..8.94 DEPARTURE….-3.38
ASOS…………9.24
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…. -9.8
TOTAL SNOWFALL FOR THE SEASON……………..72.6 DEPARTURE….+16.1
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 The low since midnight is 38F, the daily normal low is 29F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MARCH 23
HIGH 78 IN 1938
LOW 3 IN 1934
PRE 2.52 INS. IN 2010
SNOW 3.0 INS. IN 1977
WIND 78e MPH W IN 1940
RECORDS FOR MARCH 24
HIGH 70 IN 1920
LOW 6 IN 1906
PRECIP 1.51 INS. IN 1956
SNOWFALL 12.3 INS. IN 1956
PEAK GUST 71 MPH W IN 1968
TODAY’S REPORT PREPARED BY: Benjamin Turner
