Saturday, March 6, 2021

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

SATURDAY, MARCH 6, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0612E
SUNSET:  1740E

LIGHTER WIND TODAY WITH ABUNDANT SUNSHINE AND
GREAT VISIBILITY….

Today we observed almost clear skies with a visibility
around 80 miles. Wind is westerly at 10 mph, reaching
a max gust around 30 mph as of yet. Pressure is on a
steady rise, and humidity continues to drop as the day
goes on. The dew point was 7F at the 1 P.M. observation
with a temperature of 31F. This leaves us with a
humidity of 37%!

The high so far today is 31F, 11 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 and cirrostratus
Temperature: 17F; Dew Point: 5F; Relative Humidity: 59%
Wind: WNW @ 10 kts
Sea-level pressure: 29.95 in Hg; rising steadily
Visibility: 80 miles
6-hr Max temp: 21F
6-hr Min temp: 15F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 CLR 80 142/17/5/2910/995/ FEW CU/CS ALQDS/ 8/106 53015
10021 20015

10 A.M.
Weather: Clear, few cumulus and cirrostratus
Temperature: 26F; Dew Point: 6F; Relative Humidity: 43%
Wind: WNW @ 10G18 kts
Sea-level pressure: 29.99 in Hg; rising steadily
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 80 154/26/6/2910G18/999/ FEW CU/CS ALQDS/ 8/106
51012

1 P.M.
Weather: Clear, few cumulus and cirrostratus
Temperature: 31F, Dew point: 7F; Relative Humidity: 36%
Wind: W @ 8 kts
Sea-level pressure: 29.97 in Hg; steady, then decreasing
Visibility: 85 miles
6-hr Max temp: 31F
6-hr Min temp: 17F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 CLR 85 148/31/7/2608/997/ FEW CU/CS ALQDS/ 8/106
58006 10031 20017

SUMMARY FOR FRIDAY, MARCH 5, 2021

TEMPERATURE (DEGREES F)
MAX…….31   NORMAL…..41
MIN…….18   NORMAL…..23
MEAN……25   NORMAL…..32

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..-7
TOTAL DEPARTURE FOR THE MONTH……………….-19 [-4.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………40  DEPARTURE…….+7
TOTAL HEATING UNITS FOR THE MONTH…………..186  DEPARTURE……+19
TOTAL HEATING UNITS FOR THE SEASON…………4231  DEPARTURE…..-504
TOTAL HEATING UNITS LAST SEASON TO DATE…….4262  DEPARTURE……-31

PEAK WIND GUST (MPH):
420C/Official…………..39 WNW @  1:21 A.M.
AEROVANE (south tower)…..44 NW  @  1:53 A.M.
ASOS…………………..40 WNW @  1:21 A.M.
DAVIS #1……………….41 NW  @ 12:00 A.M.
DAVIS #2 (south tower)…..42 NW  @ 12:00 A.M.
RMY……………………45     @  1:49 A.M.
VECTOR…………………45     @  2:07 A.M.
MERLIN…………………36

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………29 NW  @  1:55 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….29 NW  @  1:21 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 NW  @ 12:01 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 NW  @  1:55 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..27 NW  @  1:51 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..29     @ 12:00 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……17.3 WNW [416 total miles] ASOS…………………16.2
DAVIS #1……………..17.5 WNW
DAVIS #2……………..18.3 WNW
RMY………………….15.8 NW
VECTOR……………….16.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.18
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….0.13  DEPARTURE….-0.73
ASOS………….0.16
TOTAL PRECIPITATION FOR THE YEAR…………..8.13  DEPARTURE….-1.15
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…. -2.5
TOTAL SNOWFALL FOR THE SEASON……………..72.5  DEPARTURE….+23.4

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 The low since midnight is 15F, the daily normal low is 23F

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

RECORDS FOR MARCH 6
HIGH 66 IN 1894
LOW 3 IN 1948, 2007
PRECIP 1.85 INS. IN 2001
SNOWFALL 15.5 INS. IN 2001
PEAK GUST 82 MPH S IN 1959

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

TODAY’S REPORT PREPARED BY: Benjamin Turner