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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A VERY SIMILAR DAY TO YESTERDAY WITH AN 
EVEN COLDER OVERNIGHT LOW....

We observed an average visibility of 80 miles
throughout the day, with it dropping slightly to
75 miles at the 1 P.M. observation. Wind has remained
westerly, with the highest gust so far today being 
35 mph. Temperatures today continue to remain well 
below seasonal averages. The high temperature so far 
today is 24F, 18 degrees below the daily maximum of 42F. 
The low since midnight is 6F, 18 degrees below the normal 
minimum of 24F.  


PRELIMINARY STATS FOR FEBRUARY 2019

TEMPERATURE, Deg. F
Avg. Max. 37.3 [+0.5]
Avg. Min. 21.6 [+2.5]
Mean      29.5 [+1.6]
24-hour corrected mean: 29.2
Max. for month: 62F on the 5th
Min. for month: 5F  on the 1st

HEATING DEGREE DAYS
Total heating units:    990 [-47]
Total for the season:  4486 [-82]
Total for last season: 4122

PRECIPITATION, Inches
Total: 3.61 [-0.46]
Greatest in 24 hrs: 1.14 on the 12th-13th

SNOWFALL, Inches
Total: 12.1 [-1.8]
Greatest in 24 hrs: 4.7 on 17th-18th 

WIND, mph
Avg. uncorrected wind speed: 12.9
Avg. corrected wind speed: 13.3
Prevailing wind direction: WNW at 22%
Peak gust and direction: 66 W on 25th  

SUNSHINE:
Campbell-Stokes card minutes: 9132 minutes of possible 17148 or 53%
Astronomical total minutes:   9476 minutes of possible 17766 or 53%

Today's Observations:

7 A.M.
Weather: Broken altocumulus, few cumulus offshore,
sun dimly visible
Temperature: 9F; Dew Point: -5F; Wind: W at 10G15 kts
Sea-level pressure: 30.22 ins. Hg, rising steadily
Visibility: 80 miles 
6-hr Max temp: 10F
6-hr Min temp:  6F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 12 ins. 
BHO SA 1155 E110 BKN 80 232/9/-5/2710G15/022/ FEW CU OFFSHR 
SUN DMLY VSBL/ 8/110 4/012 51014 10010 20006 

10 A.M.
Weather: Broken cirrus
Temperature: 18F; Dew Point: -1F; Wind: W at 14G24 kts  
Sea-level pressure: 30.23 ins. Hg, falling then rising 
Visibility: 80 miles
3-hr Precip: 0.00 ins. 
BHO SA 1455 E250 BKN 80 235/18/-1/2714G24/023/ 8/002 51003 

1 P.M.
Weather: Scattered cumulus  
Temperature: 23F; Dew Point: 2F; Wind: W at 16G26 kts,
Peak wind: 34 MPH (29 kts) W at 12:18 P.M.  
Sea-level pressure: 30.18 ins. Hg, falling steadily
Visibility: 75 miles
6-hr Max temp: 24F
6-hr Min temp:  8F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 11 ins. 
BHO SA 1755 45 SCT 75 219/23/2/2816G26/018/ PK WND 2829/18/ 
8/100 4/011 56016 10024 20008 


SUMMARY FOR WEDNESDAY, MARCH 6, 2019 

TEMPERATURE (DEGREES F)
MAX.....24   NORMAL.....41
MIN.....10   NORMAL.....23
MEAN....17   NORMAL.....32

DEPARTURE FROM 30-YEAR NORMAL........................-15
TOTAL DEPARTURE FOR THE MONTH........................-36 [-5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............48   DEPARTURE........+15
TOTAL HEATING UNITS FOR THE MONTH.............236   DEPARTURE........+37
TOTAL HEATING UNITS FOR THE SEASON...........4722   DEPARTURE........-45
TOTAL HEATING UNITS LAST SEASON TO DATE......4287   DIFFERENCE......+435

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................40 WNW AT  2:25 P.M.
                   AERO.........................25 WNW AT  2:22 P.M.
                   ASOS.........................M 
                   DAVIS........................40 W   AT  2:25 P.M. RMY 41
FASTEST MILE FOR YESTERDAY......................31 WNW AT 11:54 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................M
MAXIMUM 2-MINUTE DAVIS AVERAGE..................30 W   AT 11:56 A.M.
AVERAGE WIND SPEED AND DIRECTION..............15.8 WNW
                   ASOS..........................M
                   DAVIS......................15.8 W [263 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.32  DEPARTURE.......+1.28
                         ASOS..............2.35
TOTAL PRECIPITATION FOR THE YEAR..........11.26  DEPARTURE.......+1.80
                         ASOS.............11.40

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.5
TOTAL SNOWFALL FOR THE MONTH...............20.0  DEPARTURE.......+16.9
TOTAL SNOWFALL FOR THE SEASON..............44.5  DEPARTURE........-5.6


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 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31
02/03 38/27/33/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/0.35/T/396/67            24 NNW AERO 23 NNW RMY N/A
02/07 37/31/34/+7/0.35/0.0/000/00          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/0.07/0.0/204/34         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/0.90/2.8/000/00          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/0.26/0.1/018/03          36 W   AERO 32 W   RMY 36
02/14 37/26/32/+4/0.00/0.0/594/97          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/060/10         40 S   AERO 40 S   RMY 44
02/16 44/26/35/+7/0.00/0.0/504/82          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/0.01/T/618/100            30 NNW AERO 25 NNW RMY N/A
02/18 30/16/23/-6/0.41/4.7/000/00          35 NW  AERO 36 NW  RMY 41
02/19 30/10/20/-9/0.00/0.0/618/99          35 NW  AERO 33 NW  RMY N/A
02/20 26/12/19/-10/0.12/0.3/000/00         16 WNW AERO 14 SSW RMY N/A
02/21 43/21/32/+3/0.33/0.7/294/47          36 W   AERO 33 W   RMY 38
02/22 43/30/37/+8/0.00/0.0/504/80          22 NW  AERO 21 NW  RMY 23
02/23 38/24/31/+1/0.00/0.0/336/53          18 NNW AERO 16 NNW RMY N/A
02/24 45/30/38/+8/0.40/0.0/000/00          41 W   AERO 37 W   RMY 47
02/25 37/25/31/+1/0.03/T/336/57            66 W   AERO 59 W   RMY M 
02/26 29/14/22/-8/0.00/0.0/642/100         46 WNW AERO 39 WNW RMY 47
02/27 22/9/16/-15/0.10/1.2/180/28          35 WNW AERO 26 WNW RMY N/A
02/28 28/15/22/-9/0.17/2.3/486/75          22 NW  AERO 18 NW  RMY 22

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 38/17/28/-3/..../.../.../..           16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/..../.../.../..           29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/..../.../.../..           21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/..../.../.../..           33 W   AERO 18 W   RMY 32
03/05 29/10/20/-12/0.00/0.0/.../..          28 WNW AERO 12 SW  RMY N/A
03/06 24/10/17/-15/0.00/0.0/.../..          40 WNW AERO 25 WNW RMY 41

03/07 Low temp since midnight is 6F; normal low is 24F

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

RECORDS FOR MARCH 7
HIGH 66 IN 1946
LOW -1 IN 1890
PRECIP 2.05 INS. IN 1967
SNOWFALL 11.5 INS. IN 2013 
PEAK GUST 66 MPH NE IN 1962

RECORDS FOR MARCH 8
HIGH 66 IN 2012
LOW 2 IN 1986
PRECIP 2.20 INS. IN 2008
SNOWFALL 18.0 INS. IN 2013
PEAK GUST 69 MPH SSW IN 2008


TODAY'S REPORT PREPARED BY: Benjamin Turner

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