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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, FEBRUARY 19, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A FAIR WEATHER DAY FOLLOWING SOME OVERNIGHT
RAINFALL; WITH A DECENT WESTERLY WIND....

Today we are experiencing partly cloudy skies with 
excellent visibility, a contrast to the cloudy skies of 
yesterday. Visibility has been 85 miles all day, with 
snowy cap of Grand Monadnock easily recognizable. Rain
that fell overnight amounted to 0.31 inches, with the
clouds moving quickly offshore this morning. Wind is 
westerly, with speeds up to 40 mph.  

The high so far today is 42F degrees, this is 4 degrees
above the normal for the date. The low since midnight is 34F, 
14 degrees above the normal daily minimum of 20F.


Today's Observations:

7 A.M.
Weather: Broken altostratus
Temperature: 35F; Dew Point: 28F; Wind: W at 12 kts
Relative Humidity: 75%
Sea-level pressure: 30.04 ins. Hg: falling then rising
Visibility: 85 miles
6-hr Max temp: 37F
6-hr Min temp: 35F
24-hr Precip:  0.31 ins.
24-hr Snowfall: Trace
BHO SA 1155 E110 BKN 85 173/35/28/2812/004/ 8/070 70031 51027 
10037 20035

10 A.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 39F; Dew Point: 22F; Wind: WNW at 19G34 kts
Relative Humidity: 49%
Sea-level pressure: 30.04 ins. Hg: steady
Visibility: 85 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 50 SCT 110 SCT 85 173/39/22/2919G34/004/ PK WND 2834/43/ 
8/170 54000

1 P.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 40F; Dew Point: 17F; Wind: W at 22G30 kts,
Peak wind: 45 MPH (39 kts) W at 12:13 P.M.
Relative Humidity: 39%
Sea-level pressure: 30.04 ins. Hg: steady
Visibility: 85 miles
6-hr Max temp: 42F
6-hr Min temp: 35F
6-hr Precip:  0.00 ins. 
6-hr Snowfall: 0.0 ins.
BHO SA 1755 50 SCT E250 BKN 85 173/40/17/2822G30/004/ PK WND 2839/13/ 
8/102 54000 10042 20035     


SUMMARY FOR TUESDAY, FEBRUARY 18, 2020 

TEMPERATURE (DEGREES F)
MAX.....37   NORMAL.....37
MIN.....27   NORMAL.....20
MEAN....32   NORMAL.....29

DEPARTURE FROM 30-YEAR NORMAL................... +3
TOTAL DEPARTURE FOR THE MONTH...................+100 [+5.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............33  DEPARTURE....... -3
TOTAL HEATING UNITS FOR THE MONTH..............583  DEPARTURE......-101
TOTAL HEATING UNITS FOR THE SEASON............3812  DEPARTURE......-403
TOTAL HEATING UNITS LAST SEASON TO DATE.......4103  DEPARTURE......-291

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................26 SE  AT  1:06 P.M.  
                   AERO.........................26 SE  AT  1:06 P.M.   
                   ASOS.........................26 SE  AT  1:04 P.M. 
                   DAVIS........................26 ESE AT  1:04 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................18 SE  AT  1:05 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................18 SE  AT  1:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 SE  AT  1:05 P.M.
AVERAGE WIND SPEED AND DIRECTION.............10.4 ESE                
                   ASOS......................10.4
                   DAVIS.....................10.9 ESE [106 deg.]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.31  DEPARTURE......+0.16
                         ASOS..............0.30
TOTAL PRECIPITATION FOR THE MONTH..........2.20  DEPARTURE......-0.31
                         ASOS..............2.30
TOTAL PRECIPITATION FOR THE YEAR...........3.66  DEPARTURE......-3.37
                         ASOS..............3.84

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.......-8.3
TOTAL SNOWFALL FOR THE SEASON..............24.8  DEPARTURE......-17.2


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/-12/0.00/0.0/..../..        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  44/28/36/+8/0.00/0.0/..../..        25 WNW AERO 24 WNW RMY 24
02/18  37/27/32/+3/0.31/T/..../..          26 SE  AERO 26 SE  RMY N/A

02/19 The low since midnight is 34F, daily normal minimum is 20F 


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

RECORDS FOR FEBRUARY 19
HIGH 66F IN 1981
LOW -5F IN 1923
PRECIP 2.73 INCHES IN 1972
SNOWFALL 12.0 INCHES IN 1893
PEAK GUST 76 MPH ENE IN 1972

RECORDS FOR FEBRUARY 20
HIGH 68F IN 2018
LOW -4F IN 1966
PRECIP 1.90 INCHES IN 1934
SNOWFALL 15.0 INCHES IN 1921,1934
PEAK GUST 78 MPH NW IN 1972

TODAY'S REPORT PREPARED BY: Benjamin Turner