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Friday, April 11, 2014

April 11, 2014

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, 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
FRIDAY, APRIL 11, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

VERY MILD TEMPERATURES OVERNIGHT WITH LOW OF 44F
NORMAL LOW TEMPERATURE NOW 36F
TEMPERATURES RISING THROUGH THE 60’S TODAY
REACHING 70F JUST BEFORE 2 PM EDT

Today we recorded our first 70-degree reading since 70F on
October 17.  The high occurred minutes before our 1 PM EST
observation. Higher readings in the 70’s occurred earlier
during October.
The sky has been mostly cloudy today and visibility
has finally improved from 20 miles this morning to 25
to 45 miles this afternoon.
Winds have diminished since yesterday when gusts reached
over 35 MPH during the afternoon and evening.

Today’s Observations:

7 A.M.
Weather: Overcast altocumulus opaqus, duplicatus (2 levels) small
breaks in overcast higher cirrus clouds visible
Temperature: 51F; Dew Point: 41F; Wind: SSW at 11 kts,
Sea-level pressure: 29.98 ins. Hg, rising, then more rapidly
Visibility: 20 miles, except 15 miles NE, 30 miles W,
hazy all quadrants
6-hr max temp: 51F
6-hr min temp: 47F
BHO SA 1155 E95 OVC 20 153/51/41/2111/998/ SML BINOVC HIER CLDS VSB
VSBY NE 15 W 30 HAZY ALQDS/ 8/071 53014 10051 20047

10 A.M.
Weather: Scattered altocumulus (2 layers) scattered dense cirrus,
thin overcast cirrus, altocumulus of a chaotic sky, few
altocumulus castellanus, patches dense cirrus
Temperature: 58F; Dew Point: 40F; Wind: SSW at 9 kts,
Sea-level pressure: 30.00 ins. Hg, rising slightly
Visibility: 20 miles, except 15 miles NE, 30 miles W,
hazy all quadrants
BHO SA 1455 120 SCT 150 SCT 200 SCT 250 –OVC 20 160/58/40/2009/000/
AC CHAOTIC SKY FEW ACC BINOVC DNST NNW-N VSBY NE 15 W 30 HAZY ALQDS/
8/092 52007

1 P.M.
Weather: Scattered altocumulus of a chaotic sky, overcast
dense cirrus, break in overcast distant NW-N, few cumulus
forming distant NW-N
Temperature: 68F; Dew Point: 40F; Wind: WSW at 11 kts,
Wind: Direction variability from SSW to W
Sea-level pressure: 29.96 ins. Hg, falling, then more rapidly
Visibility: 35 miles, NE 25 miles, WNW 50 miles
6-hr max temp: 70F
6-hr min temp: 51F
BHO SA 1755 100 SCT 180 SCT E200 OVC 35 146/68/40/2411/996/ FEW CU
FRMG DSNT NW-N BINOVC DSNT NW-N AC CHAOTIC DNS CI ALQDS SUN DMLY VSB
VSBY NE 25 WNW 50 DSNT HZ WND 20V27/ 8/192 58014 10070 20051

WEATHER SUMMARY FOR THURSDAY, APRIL 10, 2014

TEMPERATURE (DEGREES F)
MAX…..57    NORMAL…..53
MIN…..33    NORMAL…..36
MEAN….45    NORMAL…..45

DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………+27 [+2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..20  DEPARTURE………..0
TOTAL HEATING UNITS FOR THE MONTH………….195  DEPARTURE………-27
TOTAL HEATING UNITS FOR THE SEASON………..5822  DEPARTURE……..+116
TOTAL HEATING UNITS LAST SEASON TO DATE……5218  DIFFERENCE…….+604

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………38  S    AT   3:35 P.M.
AERO…………………..N/A
ASOS…………………..39  S    AT   2:32 P.M.
DAVIS………………….37  S    AT   1:39 P.M. RMY 39
FASTEST MILE FOR YESTERDAY………………..32  S    AT   3:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..31  S    AT   3:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….30  S    AT   3:35 P.M.
AVERAGE WIND SPEED AND DIRECTION…………17.2  SSW
ASOS…………………16.8
DAVIS………………..15.2  SSW [210 deg] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE………….-0.18
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.16  DEPARTURE………….-0.54
ASOS…………..1.15
TOTAL PRECIPITATION FOR THE YEAR……….16.28  DEPARTURE………….+0.58
ASOS………….16.69

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE…………..-1.6
TOTAL SNOWFALL FOR THE SEASON…………..84.8  DEPARTURE………….+23.5

PRELIMINARY CLIMATE SUMMARY FOR APRIL 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO 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

4/1  48/31/40/-1/0.00/0.0/694/91          29 NNE AERO N/A        RMY N/A
4/2  56/34/45/+4/0.00/0.0/452/69          22 WSW AERO 20 MPH WSW RMY N/A
4/3  55/36/46/+4/0.00/0.0/707/92          23 NNW AERO 22 MPH NW  RMY 25
4/4  47/35/41/-1/…/0.0/255/33           26 ESE AERO N/A        RMY 25
4/5  51/33/42/-1/…/0.0/186/24           39 WNW AERO N/A        RMY 40
4/6  58/29/44/+1/0.00/0.0/755/97          25 W   AERO N/A        RMY N/A
4/7  59/44/52/+9/…./…/…/..          28 SSE AERO N/A        RMY N/A
4/8  62/41/52/+8/…./…/…/..          45 W   AERO N/A        RMY 44
4/9  60/36/48/+4/0.00/0.0/…/..          35 NW  AERO N/A        RMY 36
4/10 57/33/45/0/0.00/0.0/…/..           38 S   AERO N/A        RMY 39

4/11 morning low temp: 45F since midnight; the normal low is now 36F

DAILY RECORDS FOR APRIL 2014
None so far.

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

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

RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 12.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978

TODAY’S REPORT PREPARED BY: Robert Skilling

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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

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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All rights not expressly granted in this Policy are reserved by the Observatory. No access to or use of Observatory data shall be construed as a waiver of any rights or as a license to use data beyond the scope expressly stated herein.

§ 02

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§ 03

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§ 04

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§ 05

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§ 06

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§ 08

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§ 13

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§ 17–20

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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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