Sunday, March 28, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, MARCH 28, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0535E
SUNSET: 1806E
OVERCAST WITH INCREASING WIND AND RAIN IN THE AFTERNOON
HOURS….
Today we observed overcast skies with a growing fog, until
rain began between 11 A.M. and noon. The rain left 0.11 inches
in the gauge by 1 P.M. and it continuing to increase in intensity.
Pressure took an 11 mb dive since this morning, signaling oncoming
unfavorable weather.
The drought monitor was updated last Thursday. Our spring
precipitation deficit has left us and much of MA in abnormally
dry conditions. While this is not much cause for alarm, it
does mean elevated fire risk on windy, dry days. Computer
models are indicating, however, a chance of a good soaking rain
on Sunday. While not ideal to have this over the weekend of course,
it will make a beneficial impact on vegetation and reservoirs, and
will calm the fire danger.
-Drought monitor section by Andrew Swanson
The high so far today is 48F, which is the same as the normal
high. The low since midnight is 37F, which is 7 degrees
above the daily normal low of 30F.
Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 40F; Dew Point: 37F; Relative Humidity: 88%
Wind: SE @ 9 kts
Sea-level pressure: 30.15 in Hg; rising then falling
Visibility: 25 miles, thin fog
6-hr Max temp: 40F
6-hr Min temp: 37F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 10 OVC 25 211/40/37/1309/015/ THN F ALQDS/ 8/6//
50002 10040 20037
10 A.M.
Weather: Overcast stratus
Temperature: 44F; Dew Point: 42F; Relative Humidity: 93%
Wind: SE @ 10G16 kts
Sea-level pressure: 30.03 in Hg; falling, then more rapidly
Visibility: 15 miles, thin fog
3-hr Precip: 0.00 ins
3-hr Snow: 0.0 ins.
BHO SA 1455 10 OVC 15 168/44/42/1310G16/003/ THN F ALQDS/
8/6// 56043
1 P.M.
Weather: Rain
Temperature: 46F, Dew point: 46F; Relative Humidity: 100%
Wind: SE @ 12G23 kts,
Sea-level pressure: 29.83 in Hg; falling very rapidly
Visibility: 1/2 miles, fog
6-hr Max temp: 48F
6-hr Min temp: 40F
6-hr Precip: 0.11 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 X W3 1/2RF 101/46/46/1212G23/983/ RCTD PRESFR/
8//// 6011/ 58067 10048 20040
SUMMARY FOR SATURDAY, MARCH 27, 2021
TEMPERATURE (DEGREES F)
MAX…….63 NORMAL…..48
MIN…….40 NORMAL…..30
MEAN……52 NORMAL…..39
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. +13
TOTAL DEPARTURE FOR THE MONTH………………. +91 [+3.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………13 DEPARTURE……-13
TOTAL HEATING UNITS FOR THE MONTH…………..707 DEPARTURE…..-109
TOTAL HEATING UNITS FOR THE SEASON…………4752 DEPARTURE…..-631
TOTAL HEATING UNITS LAST SEASON TO DATE…….4771 DEPARTURE……-19
PEAK WIND GUST (MPH):
420C/Official…………..39 WNW @ 1:07 A.M.
AEROVANE (south tower)…..41 WNW @ 12:35 A.M.
ASOS…………………..39 WNW @ 12:33 A.M.
DAVIS #1……………….39 WNW @ 12:00 A.M.
DAVIS #2 (south tower)…..38 WNW @ 12:37 A.M.
RMY……………………44 @ 1:09 A.M.
VECTOR…………………45 @ 12:32 A.M.
MERLIN…………………M
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 WNW @ 12:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 WNW @ 1:11 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 WNW @ 1:11 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 WNW @ 12:12 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..26 @ 1:08 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..27 @ 12:12 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……11.7 WNW [280 total miles] ASOS…………………11.2
DAVIS #1……………..12.1 W
DAVIS #2……………..12.5 WNW
RMY………………….11.1 WSW
VECTOR……………….11.9
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………….1.06 DEPARTURE….-3.80
ASOS………….1.09
TOTAL PRECIPITATION FOR THE YEAR…………..9.06 DEPARTURE….-4.22
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….-11.4
TOTAL SNOWFALL FOR THE SEASON……………..72.6 DEPARTURE….+14.5
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 67/49/58/+20/0.11/0.0/…/.. 25 S AERO 26 S RMY 26
03/26 63/48/56/+17/0.01/0.0/…/.. 58 W AERO 67 W RMY 63
03/27 63/40/52/+13/0.00/0.0/…/.. 39 WNW AERO 41 WNW RMY 44
03/28 The low since midnight is 37F, 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 28
HIGH 86 IN 1998
LOW 7 IN 1923
PRECIP 2.31 INS. IN 1932
SNOWFALL 5.0 INS. IN 2015
PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991
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
TODAY’S REPORT PREPARED BY: Benjamin Turner
