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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, FEBRUARY 22, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

BRIGHT SUNSHINE AND WARMER TODAY...

After a chilly start to the morning at 23F, the temperature
has climbed to the lower 40's by early afternoon today for
the first time since Wednesday. The dew point has also 
climbed from negative single digits overnight to above
10F this afternoon. As high pressure moves out to sea, the 
sky remains nearly free of clouds with just a few high
thin cirrus clouds. A light distant haze, mostly to the 
W-NW, has held down the visibility much of the day to 
50-60 miles. 

The high so far today is 43F degrees, this is 5 degrees
above the normal of 38F. The low since midnight is 23F, 
3 degrees above the normal daily minimum of 20F.


Today's Observations:

7 A.M.
Weather: Thin scattered cirrus, distant haze all quadrants
Temperature: 25F; Dew Point: 9F; Relative Humidity: 49%
Wind: SW at 12 kts,
Sea-level pressure: 30.20 ins. Hg: steady then rising
Visibility: 60 miles
6-hr Max temp: 25F
6-hr Min temp: 24F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 250 –SCT 60 226/25/9/2312/020/ DSNT HZ ALQDS/ 
8/001 53002 10025 20024

10 A.M.
Weather: Thin scattered cirrus, distant haze all quadrants
Temperature: 33F; Dew Point: 9F; Relative Humidity: 36%
Wind: WSW at 10 kts,
Sea-level pressure: 30.19 ins. Hg: falling slightly
Visibility: 60 miles, visibility WNW-NW 50 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 –SCT 60 225/33/9/2510/019/ DSNT HZ ALQDS 
VSBY WNW-NW 50/ 8/001 58001

1 P.M.
Weather: Thin scattered cirrus, distant haze all quadrants
Temperature: 41F; Dew Point: 10F; Relative Humidity: 27%
Wind: SW at 10 kts
Sea-level pressure: 30.11 ins. Hg: falling then more quickly
Visibility: 55 miles, visibility WNW-NW 50 miles
6-hr Max temp: 43F
6-hr Min temp: 25F
6-hr Precip:  0.00 ins. 
6-hr Snowfall: 0.0 ins.
BHO SA 1755 250 –SCT 55 197/41/10/2510/011/ DSNT HZ ALQDS 
VSBY WNW-NW 50/ 8/001 58028 10043 20025


SUMMARY FOR FRIDAY, FEBRUARY 21, 2020 

TEMPERATURE (DEGREES F)
MAX.....30   NORMAL.....38
MIN.....11   NORMAL.....20
MEAN....21   NORMAL.....29

DEPARTURE FROM 30-YEAR NORMAL....................-8
TOTAL DEPARTURE FOR THE MONTH...................+93 [+4.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............44  DEPARTURE........+8
TOTAL HEATING UNITS FOR THE MONTH..............698  DEPARTURE.......-95
TOTAL HEATING UNITS FOR THE SEASON............3927  DEPARTURE......-396
TOTAL HEATING UNITS LAST SEASON TO DATE.......4227  DEPARTURE......-300

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................24 NNW AT  5:09 A.M.  
                   AERO.........................21 N   AT  5:57 A.M.   
                   ASOS.........................24 N   AT  5:57 A.M. 
                   DAVIS........................24 NW  AT  5:45 A.M. RMY n/a
FASTEST MILE FOR YESTERDAY......................24 NNW AT  5:46 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 NNW AT  5:58 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 NNW AT  5:58 A.M.
AVERAGE WIND SPEED AND DIRECTION...............9.4 NNW                
                   ASOS........................8.5
                   DAVIS.......................8.8 WNW [295 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..........2.20  DEPARTURE......-0.76
                         ASOS..............2.30
TOTAL PRECIPITATION FOR THE YEAR...........3.66  DEPARTURE......-3.65
                         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.......-9.8
TOTAL SNOWFALL FOR THE SEASON..............24.8  DEPARTURE......-18.7


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  42/25/34/+5/0.00/0.0/.../..         45 W   AERO 46 W   RMY 44
02/20  31/18/25/-4/0.00/0.0/.../..         32 W   AERO 32 W   RMY N/A
02/21  30/11/21/-8/0.00/0.0/.../..         24 NNW AERO 21 N   RMY N/A

02/22 The low since midnight is 23F, 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 22
HIGH 63F IN 1997
LOW -1F IN 1918
PRECIP 1.38 INCHES IN 1900
SNOWFALL 8.0 INCHES IN 1893
PEAK GUST 74 MPH S IN 1974

RECORDS FOR FEBRUARY 23
HIGH 67F IN 2017
LOW -8F IN 1907
PRECIP 1.48 INCHES IN 1967
SNOWFALL 10.6 INCHES IN 1967
PEAK GUST 73 MPH WNW IN 1974

TODAY'S REPORT PREPARED BY: Mike Iacono / Ann Murphy