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

WEDNESDAY, MARCH 3, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0616E
SUNSET:  1737E

A MILDER DAY FOLLOWING THE ARCTIC BLAST....

Today we observed a calmer day with skies clearing up as the 
day went on. Visibility was 70 miles on average, and wind was
much lighter at around 10 mph from the west. 

The high so far today is 43F, 2 degrees above the daily average 
max of 40F. The low since midnight is 19F, 4 degrees below the 
daily average low of 23F.


Today's Observations:

7 A.M.
Weather: Scattered altocumulus and altostratus
Temperature: 26F; Dew Point: 7F; Relative Humidity: 44%
Wind: SW @ 10G17 kts
Sea-level pressure: 29.85 in Hg; falling, then more slowly
Visibility: 75 miles
6-hr Max temp: 26F
6-hr Min temp: 19F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 2 ins.
BHO SA 1155 140 BKN 75 110/26/7/2310G17/985/ 8/070 4/002 
56013 10026 20019 

10 A.M.
Weather: Scattered altocumulus and altostratus
Temperature: 35F; Dew Point: 10F; Relative Humidity: 35%
Wind: W @ 8 kts
Sea-level pressure: 29.83 in Hg; rising unsteadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 140 SCT 75 103/35/10/2808/983/ 8/070 58007

1 P.M.
Weather: Scattered altocumulus and altostratus
Temperature: 41F, Dew point: 18F; Relative Humidity: 39%
Wind: W @ 12G19 kts 
Sea-level pressure: 29.78 in Hg; falling steadily
Visibility: 70 miles
6-hr Max temp: 43F
6-hr Min temp: 26F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 1 ins.
BHO SA 1755 140 SCT 70 087/41/18/2712G19/978/ 8/070 4/001 
58016 10043 20026

SUMMARY FOR TUESDAY, MARCH 2, 2021

TEMPERATURE (DEGREES F)
MAX.......27   NORMAL.....40
MIN.......10   NORMAL.....22
MEAN......19   NORMAL.....31

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL.......-12
TOTAL DEPARTURE FOR THE MONTH...................-10 [-5.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............46  DEPARTURE......+12
TOTAL HEATING UNITS FOR THE MONTH.............. 78  DEPARTURE......+10
TOTAL HEATING UNITS FOR THE SEASON............4123  DEPARTURE.....-512
TOTAL HEATING UNITS LAST SEASON TO DATE.......4208  DEPARTURE......-85

PEAK WIND GUST (MPH):
                     420C/Official..............63 WNW @ 11:22 A.M.
                     AEROVANE (south tower).....71 WNW @ 11:21 A.M.
                     ASOS.......................62 NW  @ 11:23 A.M.
                     DAVIS #1...................61 NW  @ 11:23 A.M.
                     DAVIS #2 (south tower).....61 WNW @ 11:22 A.M.
                     RMY........................69     @ 11:23 A.M.
                     VECTOR.....................71     @ 11:22 A.M.
                     MERLIN.....................63

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL..................43 WNW @  3:00 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................43 NW  @ 11:24 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............48 NW  @ 11:23 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............46 WNW @  3:00 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE....................44 NW  @ 11:21 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE.................46     @ 11:21 A.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL......25.0 WNW [599 total miles]
                     ASOS.....................23.5     
                     DAVIS #1.................25.6 WNW  
                     DAVIS #2.................26.2 WNW  
                     RMY......................23.0 WNW
                     VECTOR...................24.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.15
                             ASOS.............0.00
TOTAL PRECIPITATION FOR THE MONTH.............0.13  DEPARTURE....-0.22
                             ASOS.............0.16
TOTAL PRECIPITATION FOR THE YEAR..............8.13  DEPARTURE....-0.64
                              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.... -0.9
TOTAL SNOWFALL FOR THE SEASON.................72.5  DEPARTURE....+25.0


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/-12/0.00/0.0/.../..     63 WNW   AERO 71 WNW  RMY 69

03/03 The low since midnight is 19F, 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 3
HIGH 64 IN 1991, 2020
LOW -1 IN 1950
PRECIP 2.36 INS. IN 1972
SNOWFALL 12.8 INS. IN 1960
PEAK GUST 78e MPH E IN 1942

RECORDS FOR MARCH 4 
HIGH 69 IN 1974 
LOW -5 IN 1950 [RECORD LOW FOR MONTH]
PRECIP 1.80 IN 1960
SNOWFALL 17.3 IN 1960 
PEAK GUST 81e MPH SSW IN 1971

TODAY'S REPORT PREPARED BY: Benjamin Turner