Sign In Become a Member
Donate
Daily Discussions

Saturday, April 15, 2017

April 17, 2017

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

Agreement required — click “Accept & Continue” below to review and accept the Data Use & Privacy Policy

Access to this content requires acceptance of our Data Use & Privacy Policy.

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 15, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

BEAUTIFUL DAY AT GREAT BLUE HILL

It has been a beautiful day at the Blue Hill Observatory with
sunny skies and warm temperatures. Temperatures rose 28F from a
minimum of 40F this morning to 68F just before the 1:00 P.M. EST
observation. The air became very dry, with relative humidity
decreasing from 75% at 7:00 A.M. down into the low 20%s by 10:00 A.M.
Despite the dry air, distant haze lingered in the area all day.
The sun has been shining, but more cirrus clouds have slowly been
moving in. Wind has been increasing from out of the SW direction.
The peak gust measured before 1:00 P.M. was 30 MPH at 12:08 P.M.
Pressure began falling late this morning because of a low pressure
system approaching the area.

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus in all directions
Temperature: 45F; Dew Point: 38F; Wind: SW at 12G20 kts
Sea-level pressure: 30.37 ins. Hg, steady, then rising
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 45F
6-hr Min temp: 40F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 CLR 70 286/45/38/2206/037/ FEW CI ALQDS DSNT HZ ALQDS/
8/001 53006 10045 20040

10 A.M.
Weather: Scattered cirrus
Temperature: 61F; Dew Point: 24F; Wind: WSW at 12G20 kts,
Sea-level pressure: 30.35 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
BHO SA 1455 250 SCT 70 277/61/24/2512G20/035/ DSNT HZ ALQDS/
8/001 58009

1 P.M.
Weather: Scattered cirrus
Temperature: 67F; Dew Point: 30F; Wind: SSW at 15G24 kts,
Peak Wind: 26 kts (30 MPH) SSW at 12:08 A.M. EST
Sea-level pressure: 30.28 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 68F
6-hr Min temp: 45F
BHO SA 1755 250 SCT 70 255/67/30/2115G24/028/ DSNT HZ ALQDS
PK WND 2126/08/ 8/001 56002 10068 20045

SUMMARY FOR FRIDAY, APRIL 14, 2017

TEMPERATURE (DEGREES F)
MAX…..61   NORMAL…..55
MIN…..40   NORMAL…..37
MEAN….51   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH……………………+60 [+4.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14   DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE MONTH………….243   DEPARTURE………-57
TOTAL HEATING UNITS FOR THE SEASON………..5145   DEPARTURE……..-639
TOTAL HEATING UNITS LAST SEASON TO DATE……4759   DIFFERENCE…….+386

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL HEATING UNITS FOR THE MONTH……………3   DEPARTURE……….+3
TOTAL HEATING UNITS FOR THE SEASON…………..3   DEPARTURE……….+3
TOTAL HEATING UNITS LAST SEASON TO DATE………0   DIFFERENCE………+3

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….22  NNW  AT 12:00 P.M.
AERO……………………22  NNW  AT 12:00 P.M.
ASOS……………………23  NW   AT 12:31 P.M.
DAVIS…………………..21  NNW  AT 11:59 A.M. RMY 24
FASTEST MILE FOR YESTERDAY…………………16  NW   AT 11:57 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………17  NW   AT 12:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16  NNW  AT 12:01 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.0  NW
ASOS…………………..9.4
DAVIS………………….7.7  N [350 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.27  DEPARTURE……+1.91
ASOS…………..4.28
TOTAL PRECIPITATION FOR THE YEAR……….18.39  DEPARTURE……+2.03
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…….+0.6
TOTAL SNOWFALL FOR THE SEASON…………..66.4  DEPARTURE…….+4.6

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/+2/1.27/0.0/000/00           35 SSE AERO 37 S   RMY 37  TSTM
4/7  53/38/46/+3/0.00/0.0/…/..           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 77/45/61/+16/0.00/0.0/…/..          37 S   AERO 37 S   RMY 39
4/11 85/50/68/+23/0.00/0.0/…/..          28 S   AERO 28 S   RMY 30
4/12 68/47/58/+13/0.01/0.0/…/..          26 WNW AERO 28 WNW RMY N/A
4/13 58/40/49/+3/0.00/0.0/…/..           28 WNW AERO 31 NW  RMY 30
4/14 62/40/51/+5/0.00/0.0/…/..           22 NNW AERO 22 NNW RMY 24

4/15 Low temp since midnight is 40F; normal low is now 38F

DAILY RECORDS FOR APRIL 2017

4/11/17: DAILY RECORD MAXIMUM TEMPERATURE OF 85F,
BREAKS PREVIOUS RECORD OF 78F SET IN 1945

4/11/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F,
TIES WITH PREVIOUS RECORD SET IN 1955

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

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

RECORDS FOR APRIL 16
HIGH 89 IN 2012
LOW 23 IN 1943
PRECIP 2.45 IN. IN 1929
SNOWFALL 2.0 IN. IN 1904, 1962
PEAK GUST 73 MPH E IN 2007

TODAY’S REPORT PREPARED BY: Lizzy Suzedell

Please follow and like us:
error
fb-share-icon
Tweet
fb-share-icon
←
→
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

Ownership and Proprietary Rights

All observational records, compiled datasets, metadata, database structures, and related materials provided by the Blue Hill Observatory & Science Center are the exclusive property of the Blue Hill Observatory & Science Center. The Observatory has maintained continuous weather observations at the summit of Great Blue Hill since 1885, and the entirety of that record — its compilation, structure, curation, and organization — constitutes a proprietary database protected under applicable United States law, including copyright law and common law database protections.

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

Governing Law and Jurisdiction

This Policy shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts, without regard to its conflict of law provisions. For interactions with international users, this Policy shall apply to the maximum extent permitted by applicable local law.

Any dispute arising from or related to this Policy shall be subject to the exclusive jurisdiction of the state and federal courts located in Norfolk County, Massachusetts. By accessing Observatory data, all users consent to personal jurisdiction in Massachusetts and waive any objection to the venue or inconvenience of such forum.

§ 03

Permitted Uses

Observatory data are made available for the following limited, non-commercial purposes only:

  • Personal study and analysis
  • Educational classroom use
  • Student projects
  • Non-commercial academic research
  • Publication of analyses, figures, models, or conclusions derived from the data, subject to the attribution requirements of Section 4

All other uses require prior written authorization from the Observatory.

§ 04

Attribution Requirement

Any use of Observatory data in any published, presented, or publicly distributed work must include the following verbatim acknowledgment:

“Data provided by the Blue Hill Observatory & Science Center, Milton, Massachusetts. Continuous weather observations since 1885.”

Failure to include proper attribution is a material violation of this Policy.

§ 05

Prohibited Uses

Unless explicitly authorized in writing, Users may not:

  • Resell, license, sublicense, or commercially exploit Observatory data in any form
  • Redistribute the dataset in whole or in part to any third party
  • Publish the dataset for download by third parties
  • Host, mirror, or archive the dataset on any external website, repository, or storage service
  • Upload the dataset to any public or institutional data repository
  • Provide the data through APIs, automated services, or subscription platforms
  • Incorporate the data into any commercial product, software, application, or service
  • Use the data for AI or machine learning systems intended for commercial use or external distribution
  • Use the data to create derivative datasets that enable reconstruction of the underlying observations
§ 06

Commercial Licensing

Organizations seeking to use Observatory data for commercial purposes must obtain a license prior to any such use. Licensing inquiries: data@bluehill.org.

§ 07

Automated Access

Automated scraping, bulk harvesting, or systematic downloading of Observatory data is strictly prohibited without prior written authorization.

§ 08

Enforcement and Remedies

Violation of this Policy may result in immediate revocation of data access, pursuit of legal remedies available under United States law, and referral to applicable authorities. The Observatory reserves all rights to seek injunctive relief, damages, and attorneys’ fees in connection with any unauthorized use of its data.

Part II — Privacy Policy
§ 09–10

Scope & Information Collected

This section governs the collection, use, storage, and disclosure of personal information from visitors to the Blue Hill Observatory website and users of its data services. The Observatory may collect contact information (name, email, organization) when voluntarily submitted, usage data including IP addresses and pages visited, and data download records.

§ 11–12

How We Use Information & Retention

Information is used solely for: responding to inquiries and licensing requests; monitoring and enforcing compliance with this Policy; improving website performance; and communicating Observatory news to opted-in users. The Observatory does not sell, rent, or share personal information with third parties for marketing purposes. Data access records may be retained indefinitely for compliance and enforcement purposes.

§ 13

International Users and Data Transfers

The Observatory is located in the United States. International users acknowledge their information will be processed in the United States under U.S. law. Users requiring specific data processing agreements under non-US law must contact data@bluehill.org before accessing data.

§ 14–16

Cookies, Security & Children’s Privacy

The Observatory website may use cookies for analytics and functionality. By continuing to use the site, users consent to cookie use. The Observatory implements reasonable measures to protect personal information but cannot guarantee absolute security. Observatory data services are not directed at children under 13.

Part III — General Provisions
§ 17–20

Modifications, Severability, Entire Agreement & Contact

The Observatory reserves the right to modify this Policy at any time. Updated versions will be posted at bluehill.org. Continued use of Observatory data following any modification constitutes acceptance of the revised Policy. This Policy constitutes the entire agreement between the User and the Observatory. Questions and licensing inquiries: Blue Hill Observatory & Science Center, Milton, Massachusetts — data@bluehill.org

By accessing, downloading, or using any Blue Hill Observatory data or services, you acknowledge that you have read, understood, and agree to be bound by this Policy.
Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
↓ Scroll to read the full Policy — the agreement checkbox will unlock at the bottom