Sunday, March 7, 2021

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

SUNDAY, MARCH 7, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0611E
SUNSET:  1741E

FAIR WEATHER DAYS WITH CHILLY TEMPERATURES
CONTINUE….

Today we observed almost clear skies with a visibility
around 75 miles. Wind is northwesterly at 10 mph, reaching
a max gust around 18 mph as of yet. Pressure is on a
steady fall since noontime, and humidity continued to
drop as the day goes on. The dew point was 8F at the
1 P.M. observation with a temperature of 30F. This leaves
us with a humidity of 39%!

The high so far today is 32F, 10 degrees below the daily
average max of 42F. The low since midnight is 15F, 9 degrees
below the daily average low of 24F.

Today’s Observations:

7 A.M.
Weather: Clear, few cumulus offshore
Temperature: 16F; Dew Point: 8F; Relative Humidity: 71%
Wind: NW @ 7 kts
Sea-level pressure: 30.26 in Hg; rising steadily
Visibility: 75 miles
6-hr Max temp: 19F
6-hr Min temp: 15F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 CLR 75 248/16/8/3107/026/ FEW CU OFFSHR/
8/100 53022 10019 20015

10 A.M.
Weather: Clear, few cumulus offshore
Temperature: 25F; Dew Point: 9F; Relative Humidity: 51%
Wind: WNW @ 9G17 kts
Sea-level pressure: 30.28 in Hg; rising steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 75 253/25/9/3009G17/028/ FEW CU OFFSHR/
8/100 50005

1 P.M.
Weather: Clear, few cumulus and cirrus
Temperature: 30F, Dew point: 8F; Relative Humidity: 39%
Wind: NW @ 10 kts
Sea-level pressure: 30.27 in Hg; steady, then decreasing
Visibility: 75 miles
6-hr Max temp: 32F
6-hr Min temp: 16F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 CLR 75 249/30/8/3110/027/ FEW CU OFFSHR FEW CI
ALQDS/ 8/101 58004 10032 20016

SUMMARY FOR SATURDAY, MARCH 6, 2021

TEMPERATURE (DEGREES F)
MAX…….33   NORMAL…..41
MIN…….15   NORMAL…..23
MEAN……24   NORMAL…..32

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..-8
TOTAL DEPARTURE FOR THE MONTH……………….-27 [-4.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………41  DEPARTURE…….+8
TOTAL HEATING UNITS FOR THE MONTH…………..227  DEPARTURE……+27
TOTAL HEATING UNITS FOR THE SEASON…………4272  DEPARTURE…..-495
TOTAL HEATING UNITS LAST SEASON TO DATE…….4288  DEPARTURE……-16

PEAK WIND GUST (MPH):
420C/Official…………..28 WNW @  9:01 A.M.
AEROVANE (south tower)…..29 NW  @  8:58 A.M.
ASOS…………………..27 WNW @  9:00 A.M.
DAVIS #1……………….28 NW  @  8:59 A.M.
DAVIS #2 (south tower)…..MISSING
RMY……………………30     @  8:59 A.M.
VECTOR…………………33     @  8:59 A.M.
MERLIN…………………29

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………25 NW  @  5:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 WNW @  9:00 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NW  @  8:51 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………MISSING
MAXIMUM 2-MINUTE RMY AVERAGE………………..20 NW  @  8:57 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..20     @  8:47 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……11.4 WNW [273 total miles] ASOS…………………10.9
DAVIS #1……………..11.8 WNW
DAVIS #2……………..M
RMY………………….10.6 NW
VECTOR……………….11.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.17
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….0.13  DEPARTURE….-0.90
ASOS………….0.16
TOTAL PRECIPITATION FOR THE YEAR…………..8.13  DEPARTURE….-1.32
ASOS…………8.42

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…. -0.5
TOTAL SNOWFALL FOR THE MONTH……………… 0.1  DEPARTURE…. -3.0
TOTAL SNOWFALL FOR THE SEASON……………..72.5  DEPARTURE….+22.9

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

02/01   32/21/27/+1/1.86/12.7/000/00      53 NE   AERO 65 NE   RMY 62
02/02   34/29/32/+6/0.91/1.6/000/00       52 NNE  AERO 55 NE   RMY 58
02/03   34/26/30/+4/0.01/0.2/036/06       20 NW   AERO 20 NW   RMY 22
02/04   37/26/32/+6/0.02/0.7/158/26       23 NW   AERO 22 NW   RMY M
02/05   39/26/33/+7/0.01/T/000/00         33 S    AERO 32 S    RMY 30
02/06   40/28/34/+8/0.00/0.0/595/97       42 WSW  AERO 41 WSW  RMY 47
02/07   35/25/30/+3/0.71/11.6/000/00      27 WNW  AERO 28 WNW  RMY 30
02/08   27/13/20/-7/0.00/0.0/619/100      29 NW   AERO 31 WNW  RMY 32
02/09   27/18/23/-4/0.17/2.2/000/00       16 N    AERO 16 N    RMY 17
02/10   31/15/23/-4/0.00/0.0/436/70       26 WNW  AERO 25 WNW  RMY 28
02/11   31/15/23/-4/0.00/0.0/526/84       28 NW   AERO 26 NW   RMY 31
02/12   25/8/17/-10/0.00/0.0/421/67       32 NW   AERO 35 NW   RMY 36
02/13   27/15/21/-7/0.00/0.0/252/40       20 NNW  AERO 20 NNW  RMY 23
02/14   34/24/29/+1/0.00/0.0/000/00       19 ENE  AERO 16 ENE  RMY 19
02/15   31/27/29/+1/0.11/0.0/000/00       21 NNE  AERO 21 NNE  RMY 22
02/16   44/29/37/+9/0.63/0.0/000/00       39 W    AERO 41 W    RMY 43
02/17   30/19/25/-3/0.00/0.0/552/86       40 W    AERO 41 WNW  RMY 40
02/18   29/21/25/-4/0.13/1.7/000/00       24 ENE  AERO 24 ENE  RMY 25
02/19   30/24/27/-2/0.66/7.7/000/00       24 NE   AERO 23 NE   RMY 24
02/20   32/19/26/-3/0.02/0.5/156/24       32 NW   AERO 35 NW   RMY 38
02/21   33/15/24/-5/0.00/0.0/653/100      27 NW   AERO 28 NW   RMY 29
02/22   40/21/31/+2/0.22/T/020/03         41 S    AERO 41 SSE  RMY 44
02/23   43/31/37/+7/0.00/0.0/…/..       31 WNW  AERO 31 WNW  RMY 32
02/24   49/34/42/+12/0.00/0.0/…/..      39 SSW  AERO 39 SSW  RMY 42
02/25   43/28/30/+6/0.00/0.0/…/..       50 WNW  AERO 55 WNW  RMY 57
02/26   40/22/31/+1/0.00/0.0/…/..       22 WNW  AERO 22 WNW  RMY 21
02/27   47/29/38/+7/0.21/0.1/…/..       40 SSE  AERO 41 SSE  RMY 44
02/28   41/33/37/+6/0.01/0.0/…/..       24 NW   AERO 22 NW   RMY 25

DAILY RECORDS

02/01 -RECORD SNOWFALL OF 12.7 INS, BREAKING PREVIOUS RECORD
OF 11.0 INS SET IN 1898
02/01 -RECORD PRECIPITATION OF 1.86 INS, BREAKING PREVIOUS
RECORD OF 1.30 INS SET IN 1898

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   38/22/30/0/0.00/0.0/…/..       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 The low since midnight is 15F, the daily normal low is 24F

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

RECORDS FOR MARCH 7
HIGH 66 IN 1946
LOW -1 IN 1890
PRECIP 2.05 INS. IN 1967
SNOWFALL 11.5 INS. IN 2013
PEAK GUST 66 MPH NE IN 1962

RECORDS FOR MARCH 8
HIGH 66 IN 2012
LOW 2 IN 1986
PRECIP 2.20 INS. IN 2008
SNOWFALL 18.0 INS. IN 2013
PEAK GUST 69 MPH SSW IN 2008

TODAY’S REPORT PREPARED BY: Benjamin Turner