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Monday, April 10, 2017

April 10, 2017

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 10, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

SOUTHERLY WINDS GUSTING OVER 30 MPH,
VISIBILITY REMAINS AT 70 MILES DESPITE HAZY CONDITIONS

Winds shifted out of the south-southwest last evening
and remained out of that direction through early
afternoon today.  A peak gust of 31 MPH was recorded
shortly before the 1:00PM EST observation.  The south
winds have brought us hazy conditions, but visibility
still remained excellent at 70 miles all day.

Temperatures warmed to 77F from an overnight low of 45F.
The normal high for today is 53F and normal low is 36F.
Despite southerly winds, dew points were fairly low in
the low 30’s with relative humidities dropping into the
20% range by early afternoon.

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 52F; Dew Point: 29F; Wind: SSW at 16 kts
Sea-level pressure: 30.19 ins. Hg, rising, then more slowly
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 52F
6-hr Min temp: 45F
24-hr precip: 0.00
24-hr snowfall: 0.0 in.
BHO SA 1155 250 SCT 70 225/52/29/2116/019/ DSNT HZ ALQDS/
8/002 51013 10052 20045

10 A.M.
Weather: Scattered cirrus
Temperature: 69F; Dew Point: 32F; Wind: S at 13G18 kts
Sea-level pressure: 30.19 ins. Hg, steady then falling
Visibility: 70 miles, distant haze in all directions
BHO SA 1455 250 SCT 70 222/69/32/1913G18/019/ DSNT HZ ALQDS/
8/002 58003

1 P.M.
Weather: Broken cirrus
Temperature: 75F; Dew Point: 32F; Wind: S at 19G26 kts,
Peak Wind: 27 kts (31 MPH) SSW at 12:39PM EST
Sea-level pressure: 30.12 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 77F
6-hr Min temp: 51F
BHO SA 1755 E250 BKN 70 201/75/32/1919G26/012/ PK WND 2027/39
DSNT HZ ALQDS/ 8/008 58021 10077 20051

SUMMARY FOR SUNDAY, APRIL 9, 2017

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..53
MIN…..34   NORMAL…..35
MEAN….50   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………..0 [-0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15   DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE MONTH………….202   DEPARTURE………..0
TOTAL HEATING UNITS FOR THE SEASON………..5104   DEPARTURE……..-581
TOTAL HEATING UNITS LAST SEASON TO DATE……4653   DIFFERENCE…….+451

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23  W  AT 8:38 A.M.
AERO……………………23  W  AT 8:38 A.M.
ASOS……………………24  W  AT 8:38 A.M.
DAVIS…………………..22 WNW AT 8:38 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………17  W  AT 3:15 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18  W  AT 3:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 WNW AT 3:17 A.M.
AVERAGE WIND SPEED AND DIRECTION………….11.4 W
ASOS………………….11.5
DAVIS…………………10.2 W [290 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……….4.26  DEPARTURE……+2.74
ASOS…………..4.27
TOTAL PRECIPITATION FOR THE YEAR……….18.38  DEPARTURE……+2.86
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…….-0.1
TOTAL SNOWFALL FOR THE MONTH…………….2.7  DEPARTURE…….+1.2
TOTAL SNOWFALL FOR THE SEASON…………..66.4  DEPARTURE…….+5.2

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  50/34/42/-2/0.00/0.0/…/..           37 WNW AERO 40 WNW RMY 39
4/9  65/34/50/+6/0.00/0.0/…/..           23 W   AERO 23 W   RMY N/A

4/10 Low temp since midnight is 45F; normal low is now 36F

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

RECORDS FOR APRIL 10
HIGH 83 IN 1922
LOW 20 IN 1985
PRECIP 2.40 IN. IN 1935
SNOWFALL 10.1 IN. IN 1996
PEAK GUST 66 MPH WNW IN 1967

RECORDS FOR APRIL 11
HIGH 78 IN 1945
LOW 19 IN 1909
PRECIP 1.72 IN. IN 2003
SNOWFALL 9.5 IN. IN 1958
PEAK GUST 65 MPH NW IN 1963

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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