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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 22, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER FOLLOWING FREEZING TEMPERATURES
OVERNIGHT....

Conditions today were almost clear save some offshore
cumulus. Visibility was 75 miles all day, and the wind was 
around 10 mph from the NE. Pressure rose around 10 mb 
overnight with the approach of a cold and dry air mass. 
At this point, the region is looking for some rainfall,
as our annual rain total is only 5.75. This is -6.39
inches below the running total for the season.  

Despite below freezing temperatures overnight, either 
Houghton's or Ponkapoag did not show any signs of freezing.
The overnight low was 23F, this is 5 degrees below the 
normal low of 28F. The high so far today is 34F, 12 degrees
below the normal max of 46F. 


Today's Observations:

7 A.M.
Weather: Few cumulus offshore
Temperature: 25F; Dew Point: 8F; Relative Humidity: 48%
Wind: NNE at 10G17 kts
Sea-level pressure: 30.67 ins. Hg: rising then more quickly
Visibility: 75 miles
6-hr Max temp: 28F
6-hr Min temp: 23F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 75 385/25/8/0210G17/067/ FEW CU OFFSHR/ 8/100 
53036 10028 20023

10 A.M.
Weather: Few cumulus offshore
Temperature: 31F; Dew Point: 7F; Relative Humidity: 36%
Wind: NNE at 7G15 kts
Sea-level pressure: 30.72 ins. Hg: rising then more rapidly
Visibility: 75 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 75 402/31/7/0307G15/072/ FEW CU OFFSHR/ 8/100 
53017

1 P.M.
Weather: Few distant cumulus offshore
Temperature: 34F; Dew Point: 7F; Relative Humidity: 33%
Wind: NNE at 6G12 kts
Sea-level pressure: 30.73 ins. Hg: falling then rising
Visibility: 75 miles
6-hr Max temp: 34F
6-hr Min temp: 25F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 75 403/34/7/0206G12/073/ FEW DSNT CU OFFSHR/ 
8/100 50001 10034 20025


SUMMARY FOR SATURDAY, MARCH 21, 2020 

TEMPERATURE (DEGREES F)
MAX.....55   NORMAL.....46
MIN.....29   NORMAL.....28
MEAN....42   NORMAL.....37

DEPARTURE FROM 30-YEAR NORMAL...................+5
TOTAL DEPARTURE FOR THE MONTH..................+179 [+8.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............23  DEPARTURE.......-5
TOTAL HEATING UNITS FOR THE MONTH..............475  DEPARTURE......-179
TOTAL HEATING UNITS FOR THE SEASON............4615  DEPARTURE......-607
TOTAL HEATING UNITS LAST SEASON TO DATE.......5171  DEPARTURE......-556

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................45 W   AT  1:49 A.M.  
                   AERO.........................48 W   AT  1:49 A.M.   
                   ASOS.........................45 WNW AT  1:49 A.M. 
                   DAVIS........................46 W   AT  1:49 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................32 W   AT  1:51 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................29 W   AT 12:02 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................33 W   AT  1:51 A.M.
AVERAGE WIND SPEED AND DIRECTION..............13.5 NW                
                   ASOS.......................13.5
                   DAVIS......................13.6 NW  [330 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.20
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.09  DEPARTURE......-2.63
                         ASOS..............1.25
TOTAL PRECIPITATION FOR THE YEAR...........5.75  DEPARTURE......-6.39
                         ASOS..............6.16

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.3
TOTAL SNOWFALL FOR THE MONTH................1.2  DEPARTURE.......-8.5
TOTAL SNOWFALL FOR THE SEASON..............26.0  DEPARTURE......-30.7


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 The low since midnight is 23F, daily normal minimum is 28F 

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

RECORDS FOR MARCH 22
HIGH 81 IN 2012
LOW 3 IN 1885
PRE 3.48 INS. IN 2001
SNOW 8.7 INS. 1967
WIND 84e MPH E IN 1977

RECORDS FOR MARCH 23
HIGH 78 IN 1938
LOW 3 IN 1934
PRE 2.52 INS. IN 2010
SNOW 3.0 INS. IN 1977
WIND 78e MPH W IN 1940

TODAY'S REPORT PREPARED BY: Benjamin Turner