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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MARCH 30, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER OVERCAST AND DREARY DAY ATOP GREAT BLUE HILL....

Persistent light drizzle and fog has been the theme today 
following showers and thunderstorms last night. The overnight
activity brought an additional 0.35" of rain, bringing our 
24 hour total ending at 7am this morning to 0.62". We've really
been making great strides towards making up our precipitation
deficit for the month, which currently stands at only 0.81"
below normal. So far we've only managed an additional 0.01" 
since 7am this morning.
 
Visibility has improved a little bit this afternoon compared
to what it was this morning, up to about 5 miles at times.

Our high temperature so far today is 40F, which is 9 degrees 
lower than our daily normal high temperature of 49F. The low
since midnight is 37F, which is 6 degrees above the normal
low of 31 degrees.


Today's Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200 feet, light drizzle
Temperature: 37F; Dew Point: 37F; Relative Humidity: 100%
Wind: NE at 11G21 kts, peak wind 26 kts at 6:14 AM
Sea-level pressure: 29.98 ins. Hg: rising then falling
Visibility: 1/2 mile, fog
6-hr Max temp: 38F
6-hr Min temp: 37F
24-hr Precip:  0.62 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 X W2 1/2L-F 152/37/37/0411G21/998/ PK WND 0426/14/
8//// 50006 6/// 70062 10038 20037

10 A.M.
Weather: Sky obscured, vertical visibility 200 feet, light drizzle
Temperature: 38F; Dew Point: 38F; Relative Humidity: 100%
Wind: NNE at 11G19 kts
Sea-level pressure: 29.99 ins. Hg: rising then falling
Visibility: 1 mile, fog
3-hr Precip:  0.01 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 X W3 1L-F 156/38/38/0311G19/999/ 8//// 50004 6001 

1 P.M.
Weather: Overcast stratus, light drizzle
Temperature: 39F; Dew Point: 38F; Relative Humidity: 96%
Wind: NE at 10G19 kts 
Sea-level pressure: 29.95 ins. Hg: falling, then more slowly
Visibility: 5 miles, 2 miles N-NE, fog
6-hr Max temp: 40F
6-hr Min temp: 37F
6-hr Precip:  0.01 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E1 OVC 5L-F 141/39/38/0410G19/995/ VSBY 2 N-NE
LB47/ 8/7// 56015 6001 10040 20037


SUMMARY FOR SUNDAY, MARCH 29, 2020 

TEMPERATURE (DEGREES F)
MAX.....43   NORMAL.....49
MIN.....37   NORMAL.....31
MEAN....40   NORMAL.....40

DEPARTURE FROM 30-YEAR NORMAL.................... 0
TOTAL DEPARTURE FOR THE MONTH..................+191 [+6.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............25  DEPARTURE........ 0
TOTAL HEATING UNITS FOR THE MONTH..............675  DEPARTURE......-191
TOTAL HEATING UNITS FOR THE SEASON............4815  DEPARTURE......-619
TOTAL HEATING UNITS LAST SEASON TO DATE.......5378  DEPARTURE......-563

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................32 NE  AT 10:51 P.M.  
                   AERO.........................33 NE  AT 11:55 P.M  
                   ASOS.........................33 NE  AT 10:41 P.M. 
                   DAVIS........................32 E   AT  1:37 P.M. RMY 33
FASTEST MILE FOR YESTERDAY......................24 E   AT  3:48 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................23 E   AT  3:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 E   AT  3:48 P.M.
AVERAGE WIND SPEED AND DIRECTION..............15.2 E               
                   ASOS.......................15.0
                   DAVIS......................15.3 E [099 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.62  DEPARTURE......+0.45
                         ASOS..............0.64
TOTAL PRECIPITATION FOR THE MONTH..........4.41  DEPARTURE......-0.81
                         ASOS..............4.56
TOTAL PRECIPITATION FOR THE YEAR...........9.07  DEPARTURE......-5.02
                         ASOS..............9.47

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.2
TOTAL SNOWFALL FOR THE MONTH................2.8  DEPARTURE.......-9.3
TOTAL SNOWFALL FOR THE SEASON..............27.6  DEPARTURE......-31.5


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  43/37/40/0/..../0.0/.../..          32 NE  AERO 33 NE  RMY 33

03/30 The low since midnight is 37F, 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 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

RECORDS FOR MARCH 31
HIGH 89 IN 1998  [RECORD HIGH FOR MONTH]
LOW 16 IN 1923
PRECIP 2.89 IN 1987
SNOWFALL 15.0 IN 1997
PEAK GUST 81 MPH SSE IN 1987

TODAY'S REPORT PREPARED BY: Matt Douglas