Monday, March 15, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, MARCH 15, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0556E
SUNSET: 1751E
ARCTIC BLAST IN FULL SWING, GUSTY WINDS CONTINUE….
An arctic front came through yesterday afternoon accompanied
with numerous snow showers and squalls. A couple of squalls
passed over the hill deposited 0.1″ of snow and 0.01″ of
liquid equivalent. This ended the consecutive days streak
of no measurable precipitation at 12.
Today has continued blustery and very cold for the date with
the temperature only into the low-mid 20s by the 1 P.M.
observation. The record low maximum temperature for today’s
date is 23 degrees set in 1932, however we’ve already gotten
above that, so we’ll see no record for today.
Yesterday marked the 3rd consecutive day to see a peak wind
gust of 50 mph or higher. So it has certainly been a windy
stretch the last few days. Winds continue to be gusty today,
however we have not reached 50 mph. The peak so far today is
48 mph!
As mentioned above, we did have measurable precipitation
yesterday, so the consecutive days of no measurable has been
broken. However the overall dry stretch continues. The monthly
total now stands at 0.14″, which is 2.27″ below normal. The
yearly total is 8.14″ which is 2.69″ below normal to date.
The high so far today is 25F, which is 19 degrees below the
normal high of 44F. The low since midnight is 12F, which
is 14 degrees below the daily normal low of 26F.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus
Temperature: 13F; Dew Point: -3F; Relative Humidity: 49%
Wind: NW @ 20G30 kts, peak wind NW 39 mph at 6:00 A.M.
Sea-level pressure: 30.19 in Hg; rising, then more rapidly
Visibility: 65 miles
6-hr Max temp: 18F
6-hr Min temp: 12F
24-hr Precip: 0.01 ins.
24-hr Snow: 0.1 ins.
Snow Depth: 0 ins.
BHO SA 1155 40 SCT 65 222/13/-3/3120G30/019/ PK WND 3234/00/
TOTAL NEW SNW PST 24 HRS TRACE/ 8/500 53025 70001 10018 20012
10 A.M.
Weather: Clear, few stratocumulus all quadrants,
few cirrus distant W-NW
Temperature: 16F; Dew Point: -6F; Relative Humidity: 37%
Wind: NW @ 20G30 kts, peak wind NW 37 mph at 9:23 A.M.
Sea-level pressure: 30.23 in Hg; rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 70 237/16/-6/3220G30/023/ FEW SC ALQDS
FEW CI DSNT W-NW PK WND 3232/23/ 8/501 51015
1 P.M.
Weather: Clear, few stratocumulus distant NE-ESE,
few cirrus S-SW-NW
Temperature: 24F, Dew point: -6F; Relative Humidity: 26%
Wind: NW @ 18G25 kts, peak wind WNW 39 mph at 12:07 P.M.
Sea-level pressure: 30.22 in Hg; falling, then steady
Visibility: 70 miles
6-hr Max temp: 25F
6-hr Min temp: 13F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 70 233/24/-6/3118G25/022/ FEW SC DSNT NE-ESE
FEW CI S-SW-NW PK WND 3034/07/ 8/501 56004 10025 20013
SUMMARY FOR SUNDAY, MARCH 14, 2021
TEMPERATURE (DEGREES F)
MAX…….45 NORMAL…..44
MIN…….19 NORMAL…..26
MEAN……32 NORMAL…..35
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. -3
TOTAL DEPARTURE FOR THE MONTH……………….+18 [+1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………33 DEPARTURE…… +3
TOTAL HEATING UNITS FOR THE MONTH…………..433 DEPARTURE……-18
TOTAL HEATING UNITS FOR THE SEASON…………4478 DEPARTURE…..-541
TOTAL HEATING UNITS LAST SEASON TO DATE…….4440 DEPARTURE……+38
PEAK WIND GUST (MPH):
420C/Official…………..51 WNW @ 2:30 P.M.
AEROVANE (south tower)…..58 NW @ 4:02 P.M.
ASOS…………………..50 WNW @ 2:32 P.M.
DAVIS #1……………….53 NW @ 2:32 P.M.
DAVIS #2 (south tower)…..53 NW @ 4:08 P.M.
RMY……………………58 @ 2:31 P.M.
VECTOR…………………61 @ 2:32 P.M.
MERLIN…………………61
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………42 NW @ 2:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….36 NW @ 4:09 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………39 NW @ 2:32 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………40 NW @ 2:32 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..36 NW @ 2:29 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..38 @ 2:29 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……18.1 WNW [434 total miles] ASOS…………………17.2
DAVIS #1……………..18.1 NW
DAVIS #2……………..17.9 NW
RMY………………….16.4 NW
VECTOR……………….17.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.01 DEPARTURE….-0.17
ASOS………….0.01
TOTAL PRECIPITATION FOR THE MONTH………….0.14 DEPARTURE….-2.27
ASOS………….0.17
TOTAL PRECIPITATION FOR THE YEAR…………..8.14 DEPARTURE….-2.69
ASOS…………8.43
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M……… 0.1 DEPARTURE…. -0.3
TOTAL SNOWFALL FOR THE MONTH……………… 0.2 DEPARTURE…. -6.6
TOTAL SNOWFALL FOR THE SEASON……………..72.6 DEPARTURE….+19.3
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/…/.. 69 WNW AERO 78 WNW RMY 78
03/02 27/10/19/-12/T/0.1/…/.. 63 WNW AERO 71 WNW RMY 69
03/03 45/19/32/0/0.00/0.0/…/.. 30 W AERO 30 W RMY 34
03/04 38/22/30/-2/0.00/0.0/…/.. 46 NW AERO 51 NW RMY 53
03/05 31/18/25/-7/0.00/0.0/…/.. 39 WNW AERO 44 NW RMY 45
03/06 33/15/24/-8/0.00/0.0/…/.. 28 WNW AERO 29 WNW RMY 30
03/07 35/15/25/-8/0.00/0.0/…/.. 21 NW AERO 22 NW RMY 23
03/08 38/19/29/-4/T/T/…/.. 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 The low since midnight is 12F, the daily normal low is 26F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MARCH 15
HIGH 80 IN 1990
LOW 6 IN 1993
PRE 2.86 INS. IN 2010
SNOW 12.0 INS. 1967
WIND 73e MPH ESE IN 1940
RECORDS FOR MARCH 16
HIGH 73 IN 1990
LOW 8 IN 1932
PRE 1.95 INS. IN 1900
SNOW 10.0 INS. IN 1896
WIND 79 MPH NE IN 1956
TODAY’S REPORT PREPARED BY: Matt Douglas
