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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 14, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY CLOUDY DAY WITH LIGHT WIND AND WARM TEMPERATURES....

Clouds have dominated the sky throughout the day so far, 
with only short periods of sunshine. Wind speeds have 
remained relatively calm, with a peak gust of only 16 miles
per hour since midnight. The high temperature so far today
has been 70F, 15 degrees above our normal maximum temperature 
of 55F, and our low since midnight was 51F, 14 degrees above
our normal minimum temperature for the day.


PRELIMINARY STATS FOR MARCH 2019

TEMPERATURE, Deg. F
Avg. Max. 44.0 [-0.3]
Avg. Min. 26.1 [-0.5]
Mean      35.1 [-0.4]
24-hour corrected mean: 34.7
Max. for month: 67F on the 30th
Min. for month: 6F  on the 7th

HEATING DEGREE DAYS
Total heating units:    919  [+3]
Total for the season:  5404 [-80]
Total for last season: 5058

PRECIPITATION, Inches
Total: 4.08 [-1.50]
Greatest in 24 hrs: 1.82 ins. on the 3rd-4th

SNOWFALL, Inches
Total: 23.1 [+10.4]
Greatest in 24 hrs: 15.8 ins. on the 3rd-4th 

WIND, mph
Avg. uncorrected wind speed: 13.2
Avg. corrected wind speed: 13.5
Prevailing wind direction: W at 20%
Peak gust and direction: 53 S on 31st  

SUNSHINE:
Campbell-Stokes card minutes: 12612 minutes of possible 21516 or 59%
Astronomical total minutes:   13031 minutes of possible 22220 or 59%  


Today's Observations:

7 A.M.
Weather: Broken altocumulus, distant fog N-S
Temperature: 57F; Dew Point: 50F; Wind: NW at 2 kts,
Wind: light
Sea-level pressure: 29.98 ins. Hg, rising then steady
Visibility: 80 miles
6-hr Max temp: 57F
6-hr Min temp: 51F
24-hr Precip: 0.02
24-hr snowfall: 0.0
Snow depth: 0 ins. 
BHO SA 1155 E130 BKN 80 153/57/50/3202/998/ DSNT FOG N-S WND 
LGT/ 8/050 51008 70002 10057 20051

10 A.M.
Weather: Broken altocumulus
Temperature: 61F; Dew Point: 42F; Wind: E at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.07 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 E120 BKN 70 145/61/42/0902/996/ DSNT HZ ALQDS WND 
L/V/ 8/050 58008 

1 P.M.
Weather: Scattered altostratus, broken cirrocumulus
Temperature: 69F; Dew Point: 37F; Wind: SE at 9 kts
Sea-level pressure: 29.91 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 70F
6-hr Min temp: 57F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins. 
BHO SA 1755 140 SCT E250 BKN 70 127/69/37/1409/991/ DSNT HZ 
ALQDS/ 8/019 58018 10070 20057

SUMMARY FOR SATURDAY, APRIL 13, 2019 

TEMPERATURE (DEGREES F)
MAX.....71   NORMAL.....55
MIN.....54   NORMAL.....37
MEAN....63   NORMAL.....46

DEPARTURE FROM 30-YEAR NORMAL.......................+17
TOTAL DEPARTURE FOR THE MONTH........................+6 [+0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE........-17
TOTAL HEATING UNITS FOR THE MONTH.............276   DEPARTURE.........-5
TOTAL HEATING UNITS FOR THE SEASON...........5681   DEPARTURE........-84
TOTAL HEATING UNITS LAST SEASON TO DATE......5386   DIFFERENCE......+295

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................38 SSW AT 3:04 A.M.
                   AERO.........................32 SSW AT 3:04 A.M.
                   ASOS.........................39 SSW AT 3:06 A.M. 
                   DAVIS........................42 S   AT 2:53 A.M.  RMY 33
FASTEST MILE FOR YESTERDAY......................31 SSW AT 2:53 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................29 SSW AT 2:55 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................30 S   AT 2:54 A.M.
AVERAGE WIND SPEED AND DIRECTION..............15.9 SSW
                   ASOS.......................15.7 
                   DAVIS......................15.9 SSW [192 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE.......-0.14
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE MONTH..........1.76  DEPARTURE.......-0.44
                         ASOS..............1.71
TOTAL PRECIPITATION FOR THE YEAR..........14.80  DEPARTURE.......-1.40
                         ASOS.............14.86

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0  DEPARTURE........-0.1
TOTAL SNOWFALL FOR THE MONTH.............TRACE  DEPARTURE........-2.0
TOTAL SNOWFALL FOR THE SEASON.............47.6  DEPARTURE.......-14.1


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/-3/0.00/0.5/479/71           16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/0.48/3.7/000/00           29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/0.12/1.5/367/54           21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/1.70/14.3/130/19          33 W   AERO 18 W   RMY 32
03/05 29/10/20/-12/0.00/0.0/664/97          28 WNW AERO 12 SW  RMY N/A
03/06 24/10/17/-15/0.00/0.0/667/97          40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/359/52           35 W   AERO 18 W   RMY 34
03/08 35/11/23/-10/0.00/0.0/555/80          23 WSW AERO M  M   RMY M 
03/09 43/22/33/0/0.00/0.0/683/98            20 WSW AERO M  M   RMY N/A
03/10 40/26/33/0/0.53/1.0/000/00            32 ESE AERO 23 S   RMY 32
03/11 48/33/41/+7/0.00/0.0/555/79           40 NW  AERO 37 NNW RMY 41
03/12 41/27/34/0/0.00/0.0/494/70            32 N   AERO 33 N   RMY 34
03/13 43/24/34/0/0.00/0.0/404/57            18 W   AERO 21 W   RMY 23
03/14 48/32/40/0/0.00/0.0/121/17            25 S   AERO 28 S   RMY M
03/15 58/40/49/+14/0.12/0.0/000/00          37 SSW AERO 38 SSW RMY 39
03/16 50/31/41/+6/0.00/0.0/695/97           45 W   AERO 46 W   RMY 48 
03/17 40/26/33/-3/0.00/0.0/590/82           40 WNW AERO M  M   RMY N/A
03/18 41/22/32/-4/0.00/0.0/694/96           29 W   AERO M  M   RMY 30
03/19 44/25/35/-1/0.00/0.0/587/81           25 W   AERO M  M   RMY N/A
03/20 50/27/39/+2/0.00/0.0/684/94           26 S   AERO M  M   RMY 29 
03/21 50/33/42/+5/0.02/0.0/227/31           25 SSE AERO M  M   RMY 46
03/22 39/34/37/0/0.86/T/000/00              40 W   AERO M  M   RMY 44
03/23 45/28/37/-1/0.12/2.1/523/71           45 WNW AERO M  M   RMY 50
03/24 56/29/43/+5/0.00/0.0/437/59           28 W   AERO M  M   RMY 30
03/25 49/32/41/+3/0.00/0.0/468/63           25 NNW AERO M  M   RMY N/A
03/26 43/27/35/-4/0.00/0.0/716/96           28 NW  AERO M  M   RMY 28
03/27 42/24/33/-6/0.00/0.0/703/94           21 S   AERO M  M   RMY 23
03/28 51/28/40/+1/0.00/0.0/623/83           35 S   AERO M  M   RMY 37
03/29 53/40/47/+7/0.02/0.0/000/00           26 SSW AERO M  M   RMY 27
03/30 67/40/54/+14/0.00/0.0/477/63          44 S   AERO M  M   RMY 46
03/31 65/34/50/+9/0.10/0.0/129/17           53 S   AERO 52 S   RMY 55

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

04/01 45/29/37/-4/0.00/0.0/.../..           40 WNW AERO 37 W   RMY 42
04/02 50/27/39/-2/..../0.0/.../..           29 S   AERO 25 S   RMY 31
04/03 62/35/49/+7/..../0.0/.../..           54 W   AERO 58 W   RMY 56
04/04 50/34/42/0/..../0.0/.../..            46 W   AERO 41 W   RMY N/A
04/05 47/27/37/-6/..../0.0/.../..           23 SSW AERO 17 SSW RMY 23
04/06 64/32/48/+5/..../0.0/.../..           24 NW  AERO 18 W   RMY 26
04/07 66/41/54/+11/0.00/0.0/.../..          24 S   AERO 18 S   RMY 25
04/08 48/34/41/-3/0.49/0.0/.../..           25 NE  AERO 20 NE  RMY 26
04/09 40/32/36/-8/0.08/0.0/.../..           23 NE  AERO 16 N   RMY 25
04/10 43/30/37/-8/T/T/.../..                32 NW  AERO 26 NW  RMY 36
04/11 51/29/40/-5/0.00/0.0/.../..           23 NW  AERO 18 NW  RMY N/A
04/12 53/38/46/+1/.../.../.../..            35 SSW AERO 29 SSW RMY 39
04/13 71/54/63/+17/.../.../.../..           38 SSW AERO 32 SSW RMY N/A

04/14 Low temp since midnight is 51F; normal low is 37F


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

RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943

RECORDS FOR APRIL 15
HIGH 81 IN 1896
LOW 23 IN 1943
PRECIP 1.75 IN. IN 2007
SNOWFALL 1.0 IN. IN 1916, 1962
PEAK GUST 66 MPH E IN 2007

TODAY'S REPORT PREPARED BY: Samantha Richard