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Friday, January 17, 2025

January 17, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, JANUARY 17, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, JANUARY 17, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0710E SUNSET:  1640E PLENTY OF SUNSHINE, LIGHT WIND, AND DRY CONDITIONS TODAY…. This morning we started with scattered stratocumulus to our north, east, and southeast as a weak low pressure system was slowly moving out of the area. The system left us with a trace of snow, still putting us below normal in liquid and snow precipitation. The clouds moved out by mid morning and the sky has featured mostly sunny skies with just a few clouds in the vicinity. Temperatures have rebounded to near seasonal today, thanks to the sunshine and a bit of moisture in the air. As of our final observation at 1pm, we have reached the normal high for today, which is 34F. With continued sunshine and light winds, we might improve on that as the day progresses. Winds have continued to be on the lighter side today, with an average wind speed of about 8mph. Winds have been mostly out of the northwest for much of the day. Our peak gust of 17 mph occurred just after 11am. Visibility has been limited again today due to haziness, with about 30-40 miles of visibility throughout the morning and afternoon hours. The maximum temperature for today is 34F degrees, which is equal to the normal high of 34F. The minimum temperature since midnight is 16F degrees, which is 2 degrees below the normal low of 18F. ————————————————————– Today’s Observations: 7 A.M. Weather: Scattered stratocumulus Temperature: 17F; Dew Point: 14F; Relative Humidity: 88% Wind: NW @ 8 kts Sea-level pressure: 1014.0 mb; 29.94 in. Hg: rising unsteadily Visibility: 30 miles, hazy 6-hr Max temp: 21F 6-hr Min temp: 17F 24-hr Precip:  Trace 24-hr Snowfall: Trace Snow Depth: Trace BHO SA 1155 250 SCT 30 140/17/14/3208/994/ HAZY TOTAL NEW SNW PST 24 HRS TRACE/ 8/500 4/000 52028 10021 20017 10 A.M. Weather: Clear, few stratocumulus NNW-N-E-SSE Temperature: 25F; Dew Point: 20F; Relative Humidity: 81% Wind: NNW @ 7 kts Sea-level pressure: 1017.0 mb; 30.03 in. Hg: rising unsteadily Visibility: 30 miles, hazy 3-hr Precip:  0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 CLR 30 170/25/20/3207/003/ FEW SC NNW-N-E-SSE HAZY/ 8/500 52030 1 P.M. Weather: Clear, few stratocumulus distant WSW-NW and NE-E Temperature: 34F; Dew Point: 19F; Relative Humidity: 54% Wind: NW @ 5 kts, wind light Sea-level pressure: 1017.1 mb; 30.03 in. Hg: falling, then rising Visibility: 40 miles, hazy 6-hr Max temp: 34F 6-hr Min temp: 17F 6-hr Precip:  0.00 inches 6-hr Snowfall: 0.0 inches Snow Depth: Trace BHO SA 1755 CLR 40 171/34/19/3005/003/ FEW SC DSNT WSW-NW AND NE-E HAZY WND LGT/ 8/500 4/000 53001 10034 20017 ————————————————————– SUMMARY FOR THURSDAY, JANUARY 16, 2025 TEMPERATURE (DEGREES F) MAX…….30   NORMAL…..34 MIN…….13   NORMAL…..18 MEAN……22   NORMAL…..26 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-4 TOTAL DEPARTURE FOR THE MONTH……………………..-9 [-0.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025) TOTAL HEATING UNITS FOR YESTERDAY……………43  DEPARTURE……..+4 TOTAL HEATING UNITS FOR THE MONTH…………..614  DEPARTURE……..+8 TOTAL HEATING UNITS FOR THE SEASON…………2546  DEPARTURE……-270 TOTAL HEATING UNITS LAST SEASON TO DATE…….2414  DEPARTURE……+132 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all on Main Tower. E=Estimated F420C (Official)………..20 W    @   05:12 A.M. VECTOR #1 (1-Sec)……….20 SSW  @   05:21 P.M. VECTOR #2 (1-Sec)……….21 W    @   05:17 A.M. DAVIS #1……………….20 S    @   03:02 P.M. DAVIS #2 ………………24 S    @   05:04 P.M. RMY #1 (Instantaneous)…..20 SSW  @   05:21 P.M. RMY #2 (Instantaneous)…..21 W    @   05:17 A.M. MERLIN…………………18 S RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………15 W    @   05:17 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14      @   05:06 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15      @   05:17 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 W    @   05:17 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S    @   05:12 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 S    @   05:06 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 W    @   05:18 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL………8.3 WNW [199 total miles] VECTOR #1……………….8.7 VECTOR #2……………….9.1 DAVIS #1………………..8.7 WSW DAVIS #2………………..8.9 WSW RMY #1………………….8.4 WSW RMY #2………………….9.0 WSW RICHARDS (C5C)…………..OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.15 TOTAL PRECIPITATION FOR THE MONTH…………..0.67 DEPARTURE…..-1.74 TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.67 DEPARTURE…..-1.74 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.6 TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-7.4 TOTAL SNOWFALL FOR THE SEASON (2024-2025)……14.3 DEPARTURE……-9.9 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST PEAK GUST: F420C (Official) VEC1: Vector #1 1-second gust RMY:  R.M. Young #1 wind gust recording system (Instantaneous) TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 1/1    47/36/42/+13/0.55/0.0/000/00       44 W   VEC1 45 W   RMY 44 1/2    42/31/37/+9/T/T/534/97             60 W   VEC1 60 WNW RMY 63 1/3    36/26/31/+3/0.00/0.0/446/81        48 W   VEC1 48 W   RMY 51 1/4    29/22/26/-2/0.00/0.0/453/82        43 NW  VEC1 43 NW  RMY 48 1/5    32/18/25/-3/0.00/0.0/088/16        39 WNW VEC1 39 WNW RMY 40 1/6    23/15/19/-9/0.00/0.0/000/00        31 NNW VEC1 31 NNW RMY 31 1/7    24/11/18/-9/T/T/450/81             43 WNW VEC1 42 WNW RMY 47 1/8    27/14/21/-6/0.00/0.0/550/99        48 WNW VEC1 48 WNW RMY 52 1/9    25/13/19/-8/T/T/223/40             46 NW  VEC1 47 NW  RMY 51 1/10   40/19/30/+3/0.00/0.0/560/100       39 NW  VEC1 39 NW  RMY 42 1/11   30/21/26/-1/0.12/1.7/000/00        25 NW  VEC1 26 NW  RMY 28 1/12   36/19/28/+1/0.00/0.0/556/99        35 NNW VEC1 35 NNW RMY 39 1/13   39/26/33/+7/0.00/0.0/192/34        26 WNW VEC1 27 WNW RMY 27 1/14   32/20/26/0/0.00/0.0/537/95         44 WNW VEC1 44 WNW RMY 45 1/15   29/16/23/-3/0.00/0.0/504/89        37 NW  VEC1 37 NW  RMY 38 1/16   30/13/22/-4/T/T/…/..             20 W   VEC1 20 SSW RMY 20 1/17 The low since midnight is 16F, the daily normal low is 18F. ————————————————————– JANUARY DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JANUARY 17 HIGH 55F IN 1973,1995 LOW -8F IN 1907,1982 PRECIP 1.43 INS. IN 1956 SNOWFALL 13.4 INS. IN 1956 PEAK GUST 65 MPH ESE IN 2022 RECORDS FOR JANUARY 18 HIGH 62F IN 1973, 1990 LOW -10F IN 1982 PRECIP 1.68 INS. IN 1915 SNOWFALL 13.0 INS. IN 1948 PEAK GUST 85 MPH SSE IN 2006 TODAY’S REPORT PREPARED BY: Amanda Joly
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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

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
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