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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, FEBRUARY 16, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST, YET MILDER THAN YESTERDAY ATOP 
GREAT BLUE HILL....

We observed overcast skies with a decent visibility 
around 60 miles this afternoon. Wind was southwesterly,
becoming lighter as the day went on. The low since 
midnight is 27F, 8 degrees above the normal daily 
minimum of 19F. The high so far today is 37F, the same
as the average daily maximum.    


PRELIMINARY STATS FOR JANUARY 2020

TEMPERATURE, Deg. F
Avg. Max. 40.6 [+6.8]
Avg. Min. 25.9 [+8.8]
Mean      33.3 [+7.8]
24-hour corrected mean: 32.8
Max. for month: 68F on the 12th
Min. for month: 8F on the 18th

HEATING DEGREE DAYS
Total heating units:    978 [-248]
Total for the season:  3229 [-302]
Total for last season: 3495

PRECIPITATION, Inches
Total: 1.46 [-2.89]
Greatest in 24 hrs: 0.57 ins. on the 25th 

SNOWFALL, Inches
Total: 4.2 [-12.9]
Greatest in 24 hrs: 3.0 ins. on the 18th-19th

WIND, mph
Avg. uncorrected wind speed: 12.3 mph
Avg. corrected wind speed:   12.8 mph
Prevailing wind direction:   W [19%]
Peak gust and direction:     60 SSW on the 12th

SUNSHINE:
Campbell-Stokes card minutes: 8388 minutes of possible 17130 or 49%
Astronomical total minutes: 8642 minutes of possible 17639 or 49%


JANUARY 2020 RANKED 9TH WARMEST ON RECORD!
Warmest 24-Hour Adjusted Mean Temperature, deg F (1886-2020):

1) 35.6 in 1913
2) 35.0 in 1932
3) 34.6 in 1937
4) 33.9 in 2006
5) 33.8 in 1933
   33.8 in 1950
   33.8 in 1990
8) 33.5 in 2002
9) 32.8 in 2020
10) 32.7 in 2017


Today's Observations:

7 A.M.
Weather: Broken altostratus, overcast cirrostratus
Temperature: 27F; Dew Point: 16F; Wind: SW at 13G20 kts
Sea-level pressure: 30.19 ins. Hg: falling steadily
Visibility: 30 miles, distant haze
6-hr Max temp: 27F
6-hr Min temp: 24F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins. 
BHO SA 1155 E140 BKN 250 OVC 30 224/27/16/2113G20/019/ 
DSNT HZ ALQDS/ 8/018 58008 10027 20024

10 A.M.
Weather: Broken altocumulus/altostratus, overcast
cirrostratus
Temperature: 33F; Dew Point: 22F; Wind: SW at 11G18 kts
Sea-level pressure: 30.16 ins. Hg: falling steadily
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E140 BKN 250 OVC 60 214/33/22/2211G18/016/ 
8/078 58010

1 P.M.
Weather: Broken altostratus, overcast cirrostratus
Temperature: 37F; Dew Point: 20F; Wind: SW at 7 kts
Sea-level pressure: 30.09 ins. Hg: falling steadily
Visibility: 60 miles
6-hr Max temp: 37F
6-hr Min temp: 27F
6-hr Precip:  0.00 ins. 
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E110 BKN 250 OVC 60 191/37/20/2307/009/ 
8/018 58023 10037 20027     


SUMMARY FOR SATURDAY, FEBRUARY 15, 2020 

TEMPERATURE (DEGREES F)
MAX.....27   NORMAL.....37
MIN......4   NORMAL.....19
MEAN....16   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL...................-12
TOTAL DEPARTURE FOR THE MONTH...................+85 [+5.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............49  DEPARTURE.......+12
TOTAL HEATING UNITS FOR THE MONTH..............488  DEPARTURE.......-86
TOTAL HEATING UNITS FOR THE SEASON............3717  DEPARTURE......-388
TOTAL HEATING UNITS LAST SEASON TO DATE.......3994  DEPARTURE......-277

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................31 SSW AT  9:27 P.M.  
                   AERO.........................31 SSW AT  9:29 P.M.   
                   ASOS.........................32 SSW AT 10:27 P.M. 
                   DAVIS........................30 SSW AT  8:57 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................22 SSW AT  9:06 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SSW AT 11:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 SSW AT  9:27 P.M.
AVERAGE WIND SPEED AND DIRECTION.............9.8 S                
                   ASOS......................9.9
                   DAVIS.....................9.6 SW [232 deg.]


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..........1.89  DEPARTURE......-0.18
                         ASOS..............2.00
TOTAL PRECIPITATION FOR THE YEAR...........3.35  DEPARTURE......-3.07
                         ASOS..............3.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH................0.6  DEPARTURE.......-6.8
TOTAL SNOWFALL FOR THE SEASON..............24.8  DEPARTURE......-15.7


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  38/30/34/+7/0.00/0.0/400/73           39 W   AERO 38 W   RMY 41 
01/02  46/29/38/+11/0.00/0.0/269/49          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/000/00          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/0.15/0.0/000/00          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/0.15/0.5/116/21           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/133/24                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/0.01/0.4/161/29           30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/0.04/0.3/350/63           50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/0.00/0.0/540/97           43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/+11/T/T/106/19               37 SW  AERO 37 SW  RMY 39 
01/11  65/46/56/+31/0.00/0.0/408/73          53 SSW AERO 53 SSW RMY N/A           
01/12  68/36/52/+27/0.09/0.0/297/53          60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/000/00            21 NE  AERO 20 NE  RMY N/A
01/14  38/31/35/+10/0.01/0.0/000/00          16 W   AERO 15 W   RMY N/A
01/15  48/35/42/+17/0.00/0.0/503/89          24 W   AERO 23 W   RMY 24
01/16  42/24/33/+8/0.06/T/142/25             54 W   AERO 52 W   RMY 59    
01/17  24/10/17/-8/0.00/0.0/552/97           50 NW  AERO 48 NW  RMY N/A
01/18  28/8/18/-7/0.35/2.8/000/00            28 WSW AERO 24 ESE RMY N/A
01/19  40/21/31/+6/0.02/0.2/332/58           44 W   AERO 44 W   RMY 42
01/20  26/12/19/-6/0.00/0.0/442/77           33 NW  AERO 32 NW  RMY N/A
01/21  24/10/17/-8/0.00/0.0/472/82           22 NW  AERO 21 NW  RMY N/A
01/22  34/13/24/-1/0.00/0.0/566/98           16 SW  AERO 16 SW  RMY N/A
01/23  46/26/36/+11/0.00/0.0/348/60          21 SW  AERO 20 SW  RMY 19
01/24  44/31/38/+13/0.00/0.0/524/90          21 ENE AERO 17 ENE RMY N/A
01/25  50/36/43/+18/0.57/0.0/000/00          41 ESE AERO 41 ESE RMY 40 
01/26  49/35/42/+17/0.00/0.0/346/59          33 W   AERO 31 W   RMY 32
01/27  43/33/38/+13/0.00/0.0/106/18          30 W   AERO 29 W   RMY 29
01/28  37/30/34/+9/T/T/030/05                25 NW  AERO 25 NW  RMY 27
01/29  38/23/31/+6/0.00/0.0/522/88           24 N   AERO 23 N   RMY 24
01/30  34/16/25/-1/0.00/0.0/547/92           17 NNW AERO 16 NNW RMY N/A
01/31  43/24/34/+8/0.00/0.0/430/72           22 S   AERO 21 S   RMY 22

DAILY RECORDS FOR JANUARY

1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
         BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
         BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 60 SET IN 2018.
         TIES HIGHEST MAXIMUM TEMPERATURE FOR JANUARY,
         MATCHES 68F SET ON 1/26/1950.


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  38/30/34/+8/0.01/T/..../..          14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/0.00/0.0/..../..        18 W   AERO 18 WNW RMY 18
02/03  44/27/36/+10/0.00/0.0/..../..       28 W   AERO 28 W   RMY 28
02/04  44/33/39/+13/0.00/0.0/..../..       19 E   AERO 16 E   RMY 18
02/05  41/30/36/+10/0.00/0.0/..../..       20 NNW AERO 19 NNW RMY N/A
02/06  31/30/34/+8/0.00/0.0/..../..        29 E   AERO 28 E   RMY 27
02/07  53/25/39/+12/..../0.1/..../..       71 WSW AERO 71 SSW RMY 73
02/08  33/20/27/0/T/T/..../..              46 W   AERO 44 W   RMY 44
02/09  33/15/24/-3/T/T/..../..             30 SSE AERO 29 SSE RMY N/A
02/10  42/33/38/+11/..../0.0/..../..       39 SSW AERO 39 SSW RMY 39
02/11  40/36/38/+11/..../0.0/.../..        24 W   AERO 23 W   RMY N/A
02/12  41/30/36/+9/0.00/0.0/.../..         37 W   AERO 36 W   RMY N/A
02/13  35/31/34/+6/.00/0.0/.../..          29 SSW AERO 29 SSW RMY N/A
02/14  33/8/21/-7/0.00/0.0/.../..          32 WNW AERO 32 NW  RMY 34
02/15  27/4/16/-2/0.00/0.0/.../..          31 SSW AERO 31 SSW RMY N/A

02/16 The low since midnight is 23F, daily normal minimum is 19F 


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

RECORDS FOR FEBRUARY 16
HIGH 62F IN 1954
LOW -16F IN 1943
PRECIP 1.91 INCHES IN 1958
SNOWFALL 18.6 INCHES IN 1958
PEAK GUST 78 MPH W IN 1967

RECORDS FOR FEBRUARY 17
HIGH 61F IN 1981
LOW -16F IN 1896
PRECIP 1.86 INCHES IN 2003
SNOWFALL 20.0 INCHES IN 2003
PEAK GUST 72 MPH NW IN 1968

TODAY'S REPORT PREPARED BY: Benjamin Turner