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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 29, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY, RAINY DAY ON TOP OF GREAT BLUE HILL....

Persistent fog and precipitation dominated weather 
conditions today on top of Great Blue. Visibility
remained at 1/8 of a mile at each observation.
Wind has been blowing steady from the ESE since
early this morning. Our high temperature so far today
was 42F, which is 7 degrees lower than our daily normal
high temperature of 49F.


Today's Observations:

7 A.M.
Weather: Light drizzle, fog
Temperature: 41F; Dew Point: 41F; Relative Humidity: 100%
Wind: ESE at 15G24 kts
Sea-level pressure: 30.16 ins. Hg: rising then steady
Visibility: 1/8 mile
6-hr Max temp: 41F
6-hr Min temp: 40F
24-hr Precip:  0.30 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 W3 X L-F 1/8 214/41/41/1115G24/016/ L-CTD/ 8//// 
51006 70030 10041 20040

10 A.M.
Weather: Light drizzle, fog
Temperature: 42F; Dew Point: 42F; Relative Humidity: 100%
Wind: ESE at 12G18 kts
Sea-level pressure: 30.16 ins. Hg: steady then decreasing
Visibility: 1/8 mile
3-hr Precip:  0.03 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 W3 X L-F 1/8 212/42/42/11012G18/016/ L-CTD/ 8//// 
58002 6003 

1 P.M.
Weather: Light rain, fog
Temperature: 39F; Dew Point: 39F; Relative Humidity: 100%
Wind: ESE at 13G23 kts 
Sea-level pressure: 30.10 ins. Hg: falling, then more quickly
Visibility: 1/8 mile
6-hr Max temp: 42F
6-hr Min temp: 39F
6-hr Precip:  0.27 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 W3 X R-F 1/8 192/39/39/1113G23/010/ RBCMG 
R-BUKN/ 8//// 58020 6027 10042 20039


SUMMARY FOR SATURDAY, MARCH 28, 2020 

TEMPERATURE (DEGREES F)
MAX.....56   NORMAL.....49
MIN.....36   NORMAL.....31
MEAN....46   NORMAL.....40

DEPARTURE FROM 30-YEAR NORMAL....................+6
TOTAL DEPARTURE FOR THE MONTH..................+190 [+6.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............19  DEPARTURE........-5
TOTAL HEATING UNITS FOR THE MONTH..............650  DEPARTURE......-191
TOTAL HEATING UNITS FOR THE SEASON............4790  DEPARTURE......-619
TOTAL HEATING UNITS LAST SEASON TO DATE.......5360  DEPARTURE......-570

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................22 S   AT  3:59 P.M.  
                   AERO.........................21 E   AT 12:55 P.M  
                   ASOS.........................21 S   AT  3:44 P.M. 
                   DAVIS........................21 S   AT  3:38 P.M. RMY 27
FASTEST MILE FOR YESTERDAY......................14 NNW AT  1:30 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................16 S   AT  3:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 S   AT  3:59 P.M.
AVERAGE WIND SPEED AND DIRECTION..............7.5 S               
                   ASOS.......................7.8
                   DAVIS......................7.6 SSE [156 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.30  DEPARTURE......+0.12
                         ASOS..............0.29
TOTAL PRECIPITATION FOR THE MONTH..........3.79  DEPARTURE......-1.26
                         ASOS..............3.77
TOTAL PRECIPITATION FOR THE YEAR...........8.45  DEPARTURE......-5.02
                         ASOS..............8.83

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.3
TOTAL SNOWFALL FOR THE MONTH................2.8  DEPARTURE.......-9.1
TOTAL SNOWFALL FOR THE SEASON..............27.6  DEPARTURE......-31.3


PRELIMINARY CLIMATE SUMMARY FOR MARCH 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

03/01  33/15/24/-7/0.00/0.0/.../..         28 WNW AERO 28 WNW RMY 27
03/02  52/24/38/+7/T/T/.../..              40 S   AERO 39 S   RMY 41
03/03  64/45/55/+23/..../0.0/.../..        30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/..../0.0/.../..        56 W   AERO 56 W   RMY 58
03/05  51/32/42/+10/0.00/0.0/.../..        31 W   AERO 31 NW  RMY 32
03/06  47/30/39/+7/..../.../.../..         46 NE  AERO 45 NE  RMY 46
03/07  43/26/35/+2/..../.../.../..         42 N   AERO 43 N   RMY 44
03/08  53/26/40/+7/0.00/0.0/.../..         31 W   AERO 30 W   RMY 28
03/09  72/40/56/+23/0.00/0.0/.../..        32 SW  AERO 32 SW  RMY 31
03/10  68/49/59/+26/0.00/0.0/.../..        48 WSW AERO 46 WSW RMY 49
03/11  56/37/47/+13/0.00/0.0/.../..        31 WNW AERO M  M   RMY 21
03/12  46/31/39/+5/..../0.0/.../..         21 SE  AERO 18 SE  RMY N/A
03/13  59/38/49/+15/..../0.0/.../..        46 WNW AERO 44 WNW RMY 46
03/14  51/35/43/+8/0.00/0.0/.../..         37 W   AERO 36 W   RMY 35
03/15  47/28/38/+3/0.00/0.0/.../..         28 NW  AERO 28 NW  RMY N/A
03/16  36/22/29/-6/0.00/0.0/.../..         21 NE  AERO 21 ESE RMY 21
03/17  43/28/36/0/..../0.4/.../..          29 W   AERO 30 W   RMY 29
03/18  54/31/43/+7/..../0.0/.../..         26 S   AERO 26 S   RMY 26
03/19  43/37/40/+4/..../0.0/.../..         36 E   AERO 35 E   RMY 34
03/20  66/37/52/+15/..../0.0/.../..        48 W   AERO 48 W   RMY 46
03/21  55/29/42/+5/0.00/0.0/.../..         45 W   AERO 48 W   RMY N/A
03/22  36/23/30/-7/0.00/0.0/.../..         23 NE  AERO 24 NE  RMY 23
03/23  40/25/33/-5/..../1.6/.../..         38 NNE AERO 39 NNE RMY 38
03/24  48/33/41/+3/..../.../.../..         37 NNW AERO 37 NNW RMY N/A
03/25  41/35/38/0/0.03/0.0/.../..          28 ENE AERO 28 ENE RMY 27
03/26  51/30/41/+2/..../0.0/.../..         25 SSE AERO 26 SSW RMY N/A
03/27  61/41/51/+12/..../0.0/.../..        32 NW  AERO M  M   RMY 33
03/28  56/36/46/+7/..../0.0/.../..         22 S   AERO 21 E   RMY N/A

03/29 The low since midnight is 40F, daily normal minimum is 31F 

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

RECORDS FOR MARCH 29
HIGH 85 IN 1945
LOW -2 IN 1923
PRECIP 2.78 INS. IN 1984
SNOWFALL 13.5 INS. IN 1984
PEAK GUST 95 MPH ENE IN 1984

RECORDS FOR MARCH 30
HIGH 83 IN 1977
LOW 10 IN 1887
PRECIP 2.92 INS. IN 2010
SNOWFALL 3.9 INS. IN 1957
PEAK GUST 60 MPH NW IN 1999

TODAY'S REPORT PREPARED BY: Samantha Richard