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

SATURDAY, FEBRUARY 6, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0652E
SUNSET:  1705E

A FAIR WEATHER DAY WITH A GOOD AMOUNT OF WIND....

Today has been partly cloudy with gradually dryer conditions 
as the day goes on. The humidity at 2 P.M. is around 30%. 
Visibility is 65 miles on average, but the wind is the most 
notable thing about the day so far. The wind has shifted from 
south to west since this morning, and has remained strong in
doing so. Sustained winds are 25 mph on average, with a peak
gust over 40 mph.

The high so far today is 39F, 4 degrees above the daily 
average max of 35F. The low since midnight is 28F, 10 
degrees above the normal minimum of 18F. 

PRELIMINARY STATS FOR JANUARY 2021

TEMPERATURE, Deg. F
Avg. Max. 35.4 [+1.6]
Avg. Min. 22.5 [+5.4]
Mean      28.9 [+3.4]
24-hour corrected mean: 28.8
Max. for month: 52F on the 16th
Min. for month: 2F on the 31st

HEATING DEGREE DAYS
Total heating units:   1114 [-112]
Total for the season:  3044 [-487]
Total for last season: 3531

PRECIPITATION, Inches
Total: 2.32 [-2.03]
Greatest in 24 hrs: N/A 

SNOWFALL, Inches
Total: 7.2 [-9.9]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 11.1 mph
Avg. corrected wind speed:   11.7 mph
Prevailing wind direction:   NW [25%]
Peak gust and direction:     48 ESE on the 16th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A


Today's Observations:

7 A.M.
Weather: Scattered cirrus, few cumulus NE-SW
Temperature: 28F; Dew Point: 17F; Relative Humidity: 64%
Wind: W @ 11 kts, peak of 30 mph at 6:16 A.M
Sea-level pressure: 29.85 in Hg; rising steadily
Visibility: 55 miles
6-hr Max temp: 33F
6-hr Min temp: 28F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 8 ins.
BHO SA 1155 250 SCT 55 110/28/17/2611/985/ FEW SC NE-SW PK WND 
2726/16/ 8/502 4/008 70001 51024 10033 20028

10 A.M.
Weather: Scattered cirrus, few altocumulus
Temperature: 33F; Dew Point: 17F; Relative Humidity: 51%
Wind: SW @ 15G26 kts  
Peak Wind: 32 mph @ 9:35 A.M.
Sea-level pressure: 29.92 in Hg; rising steadily
Visibility: 65 miles 
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 250 SCT 65 134/33/17/2315G26/992/ FEW AC ALQDS 
PK WND 2227/35/ 8/082 51024

1 P.M.
Weather: Broken cumulus
Temperature: 39F, Dew point: 19F; Relative Humidity: 44%
Wind: WSW @ 14G29 kts, peak gust of 38 mph at 12:38 P.M.
Sea-level pressure: 29.90 in Hg, falling, then more slowly
Visibility: 65 miles 
6-hr Max temp: 39F
6-hr Min temp: 28F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 7 ins.
BHO SA 1755 60 BKN 65 126/39/19/2414G29/990/ PK WND 2432/38/ 8/100 
4/007 58008 10039 20028

SUMMARY FOR FRIDAY, FEBRUARY 5, 2021

TEMPERATURE (DEGREES F)
MAX.......39   NORMAL.....35
MIN.......26   NORMAL.....17
MEAN......33   NORMAL.....26

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL......... +7
TOTAL DEPARTURE FOR THE MONTH.....................+24 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............32  DEPARTURE...... -7
TOTAL HEATING UNITS FOR THE MONTH............. 171  DEPARTURE..... -24
TOTAL HEATING UNITS FOR THE SEASON............3215  DEPARTURE.....-511
TOTAL HEATING UNITS LAST SEASON TO DATE.......3374  DEPARTURE.....-159

PEAK WIND GUST (MPH):
                     420C/Official..............33 S   @  9:52 A.M.
                     AEROVANE (south tower).....32 S   @  9:52 A.M. 
                     ASOS.......................35 S   @  9:52 A.M.
                     DAVIS #1...................33 S   @  9:53 A.M.
                     DAVIS #2 (south tower).....37 S   @  9:53 A.M.
                     RMY........................35     @ 11:57 A.M
                     VECTOR.....................38     @  9:52 A.M.
                     MERLIN.....................36

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL..................24 S  @ 9:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................24 S  @ 9:53 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............22 S  @ 9:53 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............27 S  @ 9:53 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE.................... M
MAXIMUM 2-MINUTE VECTOR AVERAGE.................24    @ 9:50 A.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL....10.9 SW [262 total miles]
                     ASOS...................11.1     
                     DAVIS #1...............11.2 SW  
                     DAVIS #2...............12.0 SSW  
                     RMY....................11.0 
                     VECTOR.................11.3


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.01  DEPARTURE....-0.13
                             ASOS.............0.01
TOTAL PRECIPITATION FOR THE MONTH.............2.81  DEPARTURE....+2.13
                             ASOS.............3.07
TOTAL PRECIPITATION FOR THE YEAR..............5.13  DEPARTURE....+0.10
                              ASOS............5.42

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH..................15.2  DEPARTURE....+12.7
TOTAL SNOWFALL FOR THE SEASON.................48.6  DEPARTURE....+13.0


PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01   36/25/31/+4/0.06/0.3/330/60       23 E    AERO 23 NNW  RMY 23
01/02   43/30/37/+10/0.30/T/116/21        37 WNW  AERO 39 WNW  RMY 44
01/03   33/27/30/+4/0.07/0.8/000/00       23 NNE  AERO 22 NNE  RMY 25
01/04   37/28/33/+7/0.01/0.1/110/20       25 NNE  AERO 23 NNE  RMY 27
01/05   31/28/30/+4/0.05/0.7/000/00       21 NNW  AERO 21 NNW  RMY 22
01/06   38/28/33/+7/T/T/244/44            30 NW   AERO 29 NW   RMY 32
01/07   42/26/34/+8/0.00/0.0/516/93       28 NNW  AERO 26 NNW  RMY 31
01/08   40/21/31/+5/0.00/0.0/517/93       25 NNW  AERO 22 NNW  RMY 25
01/09   34/30/27/+1/0.00/0.0/395/71       25 N    AERO 23 N    RMY 24
01/10   39/24/32/+7/0.00/0.0/493/88       25 NNW  AERO 23 NNW  RMY 24
01/11   34/25/30/+5/0.00/0.0/000/00       17 SW   AERO 16 SSW  RMY 16
01/12   40/24/32/+7/0.00/0.0/438/78       23 WNW  AERO 23 WNW  RMY 24
01/13   40/26/33/+8/0.00/0.0/389/69       15 SW   AERO 14 SW   RMY 19
01/14   38/31/35/+10/0.09/T/000/00        16 SSW  AERO 16 SSW  RMY 19
01/15   40/32/36/+11/0.00/0.0/266/47      25 ESE  AERO 23 ESE  RMY 27 TSTM
01/16   52/33/43/+18/1.00/0.0/000/00      48 ESE  AERO 53 SE   RMY 54
01/17   41/32/37/+12/0.00/0.0/314/55      47 W    AERO 46 W    RMY 54
01/18   42/27/35/+10/T/0.0/366/64         35 W    AERO 37 WNW  RMY 36
01/19   39/23/31/+6/T/T/293/51            25 WNW  AERO 25 WNW  RMY 27
01/20   37/22/30/+5/T/T/144/25            32 WNW  AERO 33 WNW  RMY 34
01/21   31/17/24/-1/T/0.1/081/14          23 WNW  AERO 24 SSW  RMY 24
01/22   42/29/36/+11/0.00/0.0/226/39      28 WNW  AERO 24 WNW  RMY 29
01/23   29/14/22/-3/0.00/0.0/442/76       41 WNW  AERO 41 WNW  RMY 46
01/24   29/13/21/-4/0.00/0.0/571/98       43 WNW  AERO 48 WNW  RMY 44
01/25   35/15/25/0/0.00/0.0/.../..        28 NW   AERO 29 NW   RMY 30
01/26   36/20/28/+3/0.17/2.4/.../..       18 E    AERO 18 E    RMY 20
01/27   33/27/30/+5/0.12/1.9/.../..       16 NNW  AERO 17 NNW  RMY 17
01/28   29/13/21/-4/0.09/0.9/.../..       39 NW  AERO 48 NW   RMY 42
01/29   15/4/10/-15/0.00/0.0/.../..       44 NW   AERO 46 NW   RMY 50
01/30   19/3/11/-15/0.00/0.0/.../..       24 NW   AERO 28 NW   RMY 27
01/31   23/2/13/-13/0.00/0.0/.../..       18 NW   AERO 18 NW   RMY 19

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/.../..      53 NE   AERO 65 NE   RMY 62
02/02   34/29/32/+6/..../.../.../..       52 NNE  AERO 55 NE   RMY 58
02/03   34/26/30/+4/.../.../.../..        20 NW   AERO 20 NW   RMY 22
02/04   37/26/32/+6/0.02/0.7/.../..       23 NW   AERO 22 NW   RMY M        
02/05   39/26/33/+7/0.01/T/.../..         33 S    AERO 32 S    RMY 30

02/06 The low since midnight is 28F, the daily normal low is 18F

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 

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

RECORDS FOR FEBRUARY 6
HIGH 54F IN 1909
LOW -10F IN 1895
PRECIP 1.88 INS. IN 1896
SNOWFALL 13.0 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 84e MPH NE IN 1978

RECORDS FOR FEBRUARY 7
HIGH 51F IN 1951,1953
LOW -8F IN 1910
PRECIP 2.12 INS. IN 1983
SNOWFALL 17.1 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 87e MPH SSE IN 1951

TODAY'S REPORT PREPARED BY: Benjamin Turner