Saturday, April 8, 2017

| April 9, 2017 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 8, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

WINDY BUT PLEASANT DAY AT GREAT BLUE HILL

Winds today have been out of the WNW. The peak gust so far was
37 MPH at 10:12 A.M. EST. Pressure has been increasing as the
low pressure system moved north. The pressure increased by almost
0.4 inches of mercury from 1:00 P.M. yesterday to 1:00 P.M. today.
Skies have been partly cloudy all day with mostly scattered and
broken cumulus. The sun was shining brightly in the morning, but
by the afternoon, the increasing cumulus clouds started to block
some of the sunlight. Temperatures today have not been as warm as
yesterday, but they have still been pleasant. A maximum temperature
of 47F was measured before 1:00 P.M. EST. Visibility has been
excellent at 80 miles all day, and air has been very dry with a
dew point of only 21F at 1:00 P.M.

Today’s Observations:

7 A.M.
Weather: Scattered cumulus, few altocumulus in all directions
Temperature: 38F; Dew Point: 25F; Wind: W at 16G24 kts,
Peak Wind: 26 kts (30 MPH) at 6:32 AM
Sea-level pressure: 29.64 ins. Hg, rising steadily
Visibility: 80 miles
6-hr Max temp: 37F
6-hr Min temp: 34F
24-hr precip: 0.00
24-hr snowfall: 0.0 in.
BHO SA 1155 55 SCT 80 038/38/25/2816G24/964/ FEW AC ALQDS PK WND
2826/32/ 8/130 52033 10037 20034

10 A.M.
Weather: Broken cumulus, few cirrus in all directions
Temperature: 45F; Dew Point: 24F; Wind: WNW at 17G26 kts,
Peak Wind: 30 kts (35 MPH) at 9:33 AM
Sea-level pressure: 29.68 ins. Hg, rising, then more quickly
Visibility: 80 miles
BHO SA 1455 E45 BKN 80 051/45/24/2917G26/968/ FEW CI ALQDS PK WND
2930/33/ 8/101 53013

1 P.M.
Weather: Broken cumulus, few cirrus in all directions
Temperature: 45F; Dew Point: 21F; Wind: WNW at 19G29 kts,
Peak Wind: 30 kts (35 MPH) at 12:33 PM
Sea-level pressure: 29.67 ins. Hg, rising, then falling
Visibility: 80 miles
6-hr Max temp: 47F
6-hr Min temp: 37F
6-hr precip: 0.00 in.
6-hr snowfall: 0.0 in.
BHO SA 1755 E50 BKN 80 048/45/21/2919G29/967/ FEW CI ALQDS PK WND
2930/33/ 8/101 51010 10047 20037

SUMMARY FOR FRIDAY, APRIL 7, 2017

TEMPERATURE (DEGREES F)
MAX…..53   NORMAL…..52
MIN…..38   NORMAL…..35
MEAN….46   NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL…………………….+3
TOTAL DEPARTURE FOR THE MONTH…………………….-4 [-0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19   DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH………….164   DEPARTURE……….+4
TOTAL HEATING UNITS FOR THE SEASON………..5066   DEPARTURE……..-578
TOTAL HEATING UNITS LAST SEASON TO DATE……4603   DIFFERENCE…….+463

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….43 SSW AT 10:16 A.M.
AERO……………………47 SSW AT 10:15 A.M.
ASOS……………………45 SW  AT 10:16 A.M.
DAVIS…………………..47 SW  AT 10:13 A.M. RMY 48
FASTEST MILE FOR YESTERDAY…………………35 SSW AT 10:23 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………33 SSW AT 10:24 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..34 WSW AT 10:25 A.M.
AVERAGE WIND SPEED AND DIRECTION………….18.2 S
ASOS………………….17.3
DAVIS…………………16.2 WSW [245 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.26  DEPARTURE……+3.07
ASOS…………..4.27
TOTAL PRECIPITATION FOR THE YEAR……….18.38  DEPARTURE……+3.19
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.2
TOTAL SNOWFALL FOR THE MONTH…………….2.7  DEPARTURE…….+1.5
TOTAL SNOWFALL FOR THE SEASON…………..66.4  DEPARTURE…….+5.5

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1  35/31/33/-8/2.21/2.7/000/00           40 ENE AERO 41 ENE RMY 41
4/2  53/30/42/+1/0.00/0.0/…/..           32 NW  AERO 33 NW  RMY 34
4/3  60/35/48/+6/0.00/0.0/…/..           21 W*  AERO 20 NW  RMY N/A
4/4  42/35/39/-3/0.78/0.0/…/..           41 ESE AERO 43 ESE RMY 42
4/5  41/35/38/-5/0.00/0.0/000/00           21 NNW AERO 20 NNW RMY N/A
4/6  55/35/45/+2/…/0.0/000/00            35 SSE AERO 37 S   RMY 37  TSTM
4/7  53/38/46/+3/…/0.0/…/..            43 SSW AERO 47 SSW RMY 48

4/8  Low temp since midnight is 34F; normal low is now 35F

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

RECORDS FOR APRIL 8
HIGH 87 IN 1991
LOW 17 IN 1888
PRECIP 1.78 IN. IN 1956
SNOWFALL 9.3 IN. IN 1956
PEAK GUST 70 MPH S IN 2000

RECORDS FOR APRIL 9
HIGH 83 IN 1991
LOW 18 IN 1888
PRECIP 2.38 IN. IN 1935
SNOWFALL 11.0 IN. IN 1917
PEAK GUST 72 MPH WNW IN 1962

TODAY’S REPORT PREPARED BY: Lizzy Suzedell

Category: Daily Discussions

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