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

THURSDAY, MARCH 4, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0615E
SUNSET:  1738E

VERY WINDY WITH GOOD VISIBILITY AND
ABUNDANT AFTERNOON SUNSHINE....

We observed mostly cloudy skies this morning, and an average
visibility of 75 miles. Wind was strong and northwesterly,
with an average speed of over 20 mph. The highest gust seen
is almost 40 mph. Conditions are dry, with a relative humidity
around 40% this afternoon.

The high so far today is 38F, 3 degrees below the daily average
max of 41F. The low since midnight is 30F, 7 degrees above the
daily average low of 23F.


Today's Observations:

7 A.M.
Weather: Scattered stratocumulus
Temperature: 31F; Dew Point: 26F; Relative Humidity: 81%
Wind: NW @ 7 kts
Sea-level pressure: 29.73 in Hg; falling, then rising
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 30F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 1 in.
BHO SA 1155 40 SCT 70 068/31/26/3307/973/ 8/800 4/001 50000
10036 20030

10 A.M.
Weather: Broken stratocumulus
Temperature: 34F; Dew Point: 22F; Relative Humidity: 62%
Wind: WNW @ 15G29 kts, peak of 34 mph at 9:43 A.M.
Sea-level pressure: 29.71 in Hg; falling unsteadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 40 BKN 75 062/34/22/2915G29/971/ PK WND 3129/43/
8/800 58006

1 P.M.
Weather: Broken stratocumulus
Temperature: 37F, Dew point: 19F; Relative Humidity: 48%
Wind: WNW @ 17G27 kts, peak of 34 mph at 12:13 P.M.
Sea-level pressure: 29.65 in Hg; falling steadily
Visibility: 75 miles
6-hr Max temp: 38F
6-hr Min temp: 31F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 45 BKN 75 042/37/19/3017G27/965/ PK WND 3129/13/
8/800 58020 10038 20031

SUMMARY FOR WEDNESDAY, MARCH 3, 2021

TEMPERATURE (DEGREES F)
MAX.......45   NORMAL.....41
MIN.......19   NORMAL.....23
MEAN......32   NORMAL.....32

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL......+/-0
TOTAL DEPARTURE FOR THE MONTH...................-10 [-3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............33  DEPARTURE.....+/-0
TOTAL HEATING UNITS FOR THE MONTH..............111  DEPARTURE......+10
TOTAL HEATING UNITS FOR THE SEASON............4123  DEPARTURE.....-513
TOTAL HEATING UNITS LAST SEASON TO DATE.......4208  DEPARTURE......-62

PEAK WIND GUST (MPH):
                     420C/Official..............30 W   @ 10:08 A.M.
                     AEROVANE (south tower).....30 W   @ 10:05 A.M.
                     ASOS.......................30 W   @ 10:08 A.M.
                     DAVIS #1...................31 W   @ 10:07 A.M.
                     DAVIS #2 (south tower).....30 W   @ 10:07 A.M.
                     RMY........................34     @ 10:14 A.M.
                     VECTOR.....................35     @ 10:14 A.M.
                     MERLIN.....................30

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL..................20 W   @  1:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................20 W   @  1:58 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............20 W   @ 10:33 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............20 NW  @ 10:16 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE....................19 SW  @  4:06 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE.................19     @  1:55 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL......12.3 W [296 total miles]
                     ASOS.....................12.0     
                     DAVIS #1.................12.8 W  
                     DAVIS #2.................13.0 W    
                     RMY......................11.6 W
                     VECTOR...................12.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.16
                             ASOS.............0.00
TOTAL PRECIPITATION FOR THE MONTH.............0.13  DEPARTURE....-0.38
                             ASOS.............0.16
TOTAL PRECIPITATION FOR THE YEAR..............8.13  DEPARTURE....-0.80
                              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.... -1.4
TOTAL SNOWFALL FOR THE SEASON.................72.5  DEPARTURE....+24.5


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 The low since midnight is 30F, 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 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

RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 1920, 2001
SNOWFALL 12.0 INS. IN 1917
PEAK GUST 76e MPH WNW IN 1971

TODAY'S REPORT PREPARED BY: Benjamin Turner