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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 17, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

BRIGHT SUNSHINE, MODERATE BREEZE, AND MILD TEMPERATURES....

Plenty of sunshine being observed today with nothing more
than a few cirrus around early this morning, and a few 
stratocumulus this afternoon. Visibility has improved from
40 miles this morning to around 60 miles this afternoon.

A moderate breeze has been occurring generally sustained 
between 10-15 mph, with occasional gusts of 20-25 mph.

Temperatures are definitely mild for mid February. The 
high so far today is 43F degrees, this is 6 degrees above
the normal daily maximum of 37F. The low since midnight is
29F, 10 degrees above the normal daily minimum of 19F.


Today's Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 31F; Dew Point: 23F; Wind: W at 13G18 kts
Relative Humidity: 72%
Sea-level pressure: 30.15 ins. Hg: rising, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 32F
6-hr Min temp: 29F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins. 
BHO SA 1155 200 SCT 250 –SCT 40 210/31/23/2713G18/015/
PTCHES DENSE CI E-S HAZY/ 8/002 53014 10032 20029

10 A.M.
Weather: Scattered stratocumulus, scattered cirrus
Temperature: 39F; Dew Point: 21F; Wind: WNW at 9G18 kts
Relative Humidity: 48%
Sea-level pressure: 30.21 ins. Hg: rising, then more slowly
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 40 SCT 250 –SCT 40 231/39/21/3009G18/021/
HAZY/ 8/501 51021

1 P.M.
Weather: Clear, few stratocumulus WSW-NW-NE
Temperature: 43F; Dew Point: 16F; Wind: WNW at 10G20 kts
Relative Humidity: 33%
Sea-level pressure: 30.20 ins. Hg: steady, then falling
Visibility: 60 miles, hazy
6-hr Max temp: 43F
6-hr Min temp: 29F
6-hr Precip:  0.00 ins. 
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 60 227/43/16/2910G20/020/ FEW SC WSW-NW-NE
HAZY/ 8/500 58004 10043 20031     


SUMMARY FOR SUNDAY, FEBRUARY 16, 2020 

TEMPERATURE (DEGREES F)
MAX.....40   NORMAL.....37
MIN.....23   NORMAL.....19
MEAN....32   NORMAL.....28

DEPARTURE FROM 30-YEAR NORMAL................... +4
TOTAL DEPARTURE FOR THE MONTH...................+89 [+5.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............33  DEPARTURE....... -4
TOTAL HEATING UNITS FOR THE MONTH..............521  DEPARTURE.......-90
TOTAL HEATING UNITS FOR THE SEASON............3750  DEPARTURE......-392
TOTAL HEATING UNITS LAST SEASON TO DATE.......4024  DEPARTURE......-274

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................38 SW  AT  2:52 A.M.  
                   AERO.........................38 SW  AT  2:55 A.M.   
                   ASOS.........................39 SSW AT  2:53 A.M. 
                   DAVIS........................39 SW  AT  2:52 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................28 SW  AT  2:21 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................28 SSW AT  2:54 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................27 SW  AT  2:20 A.M.
AVERAGE WIND SPEED AND DIRECTION.............12.5 SW                
                   ASOS......................12.5
                   DAVIS.....................12.3 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......-0.33
                         ASOS..............2.00
TOTAL PRECIPITATION FOR THE YEAR...........3.35  DEPARTURE......-3.22
                         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.......-7.3
TOTAL SNOWFALL FOR THE SEASON..............24.8  DEPARTURE......-16.2


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  40/23/32/+4/0.00/0.0/..../..        38 SW  AERO 38 SW  RMY N/A

02/17 The low since midnight is 29F, 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 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

RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008

TODAY'S REPORT PREPARED BY: Matt Douglas