Monday, April 1, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
A FAIR WEATHER DAY WITH GOOD VISIBILITY AND
SIGNIFICANT WESTERLY WIND….
Today we observed an average visibility of 85 miles,
with a relative humidity around 20% by the 1 P.M.
observation. Cloud cover consisted of scattered
fair weather cumulus. Wind was strong and westerly,
with a max gust so far of 40 mph. The average wind
speed for the day is a little below 20 mph. The
high so far today is 45F, 5 degrees below the
daily normal maximum of 50F. The low since midnight
is 31F, a degree below the daily normal.
Today’s Observations:
7 A.M.
Weather: Scattered cumulus
Temperature: 33F; Dew Point: 24F; Wind: W at 14G21 kts
Sea-level pressure: 29.94 ins. Hg, falling then more slowly
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr Precip: 0.10 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 40 SCT 80 139/33/24/2814G21/994/ 8/100 70010
51038 10034 20031
10 A.M.
Weather: Scattered cumulus
Temperature: 41F; Dew Point: 20F; Wind: W at 20G28 kts
Peak wind: 34 MPH (30 kts) S at 9:17 A.M.
Sea-level pressure: 30.01 ins. Hg, rising, then more quickly
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT 85 161/41/20/2820G28/001/ PK WND 2830/17/
8/100 51022
1 P.M.
Weather: Scattered cumulus
Temperature: 42F; Dew Point: 15F; Wind: WNW at 23G31 kts,
Peak Wind: 40 MPH (35 kts) WNW at 11:31 A.M.
Sea-level pressure: 30.05 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 45F
6-hr Min temp: 33F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 40 SCT 85 175/42/15/3023G31/005/ PK WND 3035/1631/
8/100 53014 10045 20033
SUMMARY FOR SUNDAY, MARCH 31, 2019
TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..49
MIN…..34 NORMAL…..32
MEAN….50 NORMAL…..41
DEPARTURE FROM 30-YEAR NORMAL…………………….+9
TOTAL DEPARTURE FOR THE MONTH…………………….-4 [-0.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15 DEPARTURE………-9
TOTAL HEATING UNITS FOR THE MONTH………….919 DEPARTURE………+3
TOTAL HEATING UNITS FOR THE SEASON………..5405 DEPARTURE……..-79
TOTAL HEATING UNITS LAST SEASON TO DATE……5058 DIFFERENCE……+347
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..53 S AT 10:28 A.M.
AERO…………………….52 S AT 10:25 A.M.
ASOS…………………….57 S AT 10:29 A.M.
DAVIS……………………66 S AT 10:28 A.M. RMY 55
FASTEST MILE FOR YESTERDAY………………….45 S AT 10:33 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….41 S AT 10:38 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………45 S AT 10:40 A.M.
AVERAGE WIND SPEED AND DIRECTION………….21.3 S
ASOS………………….19.4
DAVIS…………………20.7 S [190 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.10 DEPARTURE…….-0.07
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE MONTH……….4.07 DEPARTURE…….-1.50
ASOS…………..4.09
TOTAL PRECIPITATION FOR THE YEAR……….13.03 DEPARTURE…….-0.96
ASOS………….13.16
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.3
TOTAL SNOWFALL FOR THE MONTH……………23.1 DEPARTURE…….+10.4
TOTAL SNOWFALL FOR THE SEASON…………..47.6 DEPARTURE…….-12.1
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/…./…/462/71 16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/…./…/000/00 29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/…./…/354/54 21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/…./…/126/19 33 W AERO 18 W RMY 32
03/05 29/10/20/-12/0.00/0.0/642/97 28 WNW AERO 12 SW RMY N/A
03/06 24/10/17/-15/0.00/0.0/648/97 40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/348/52 35 W AERO 18 W RMY 34
03/08 35/11/23/-10/0.00/0.0/540/80 23 WSW AERO M M RMY M
03/09 43/22/33/0/0.00/0.0/660/98 20 WSW AERO M M RMY N/A
03/10 40/26/33/0/…./…/000/00 32 ESE AERO 23 S RMY 32
03/11 48/33/41/+7/…./…/534/79 40 NW AERO 37 NNW RMY 41
03/12 41/27/34/0/…./…/480/70 32 N AERO 33 N RMY 34
03/13 43/24/34/0/…./…/390/57 18 W AERO 21 W RMY 23
03/14 48/32/40/0/…./…/114/17 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/+6/0.00/0.0/672/97 45 W AERO 46 W RMY 48
03/17 40/26/33/-3/0.00/0.0/570/82 40 WNW AERO M M RMY N/A
03/18 41/22/32/-4/0.00/0.0/702/100 29 W AERO M M RMY 30
03/19 44/25/35/-1/0.00/0.0/570/81 25 W AERO M M RMY N/A
03/20 50/27/39/+2/0.00/0.0/…/.. 26 S AERO M M RMY 29
03/21 50/33/42/+5/…./…/…/.. 25 SSE AERO M M RMY 46
03/22 39/34/37/0/…./…/…/.. 40 W AERO M M RMY 44
03/23 45/28/37/-1/0.00/0.0/…/.. 45 WNW AERO M M RMY 50
03/24 56/29/43/+5/0.00/0.0/…/.. 28 W AERO M M RMY 30
03/25 49/32/41/+3/0.00/0.0/…/.. 25 NNW AERO M M RMY N/A
03/26 43/27/35/-4/0.00/0.0/…/.. 28 NW AERO M M RMY 28
03/27 42/24/33/-6/0.00/0.0/…/.. 21 S AERO M M RMY 23
03/28 51/28/40/+1/0.00/0.0/…/.. 35 S AERO M M RMY 37
03/29 53/40/47/+7/0.02/0.0/…/.. 26 SSW AERO M M RMY 27
03/30 67/40/54/+14/0.00/0.0/…/.. 44 S AERO M M RMY 46
03/31 65/34/50/+9/0.10/0.0/…/.. 53 S AERO 52 S RMY 55
04/01 Low temp since midnight is 31F; normal low is 32F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 1
HIGH 74 IN 1967
LOW 6 IN 1923 [RECORD FOR MONTH]
PRECIP 3.47 IN. IN 2004 [RECORD FOR MONTH]
SNOWFALL 15.0 IN. IN 1997 [RECORD FOR MONTH]
PEAK GUST 75 MPH SSW IN 1962
RECORDS FOR APRIL 2
HIGH 77 IN 1967
LOW 14 IN 1919
PRECIP 1.83 IN. IN 1970
SNOWFALL 13.0 IN. IN 1887
PEAK GUST 76 MPH SSW IN 1970
TODAY’S REPORT PREPARED BY: Benjamin Turner
