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Wednesday, November 12, 2025

November 12, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, NOVEMBER 12, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, NOVEMBER 12, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0632E SUNSET:  1625E OVERCAST SKIES WITH A FEW SNOW SHOWERS AS A WARM FRONT PUSHES THROUGH…. A warm front pushing through the region today has spawned an area of light snow showers. So far it has only manifested as a few flakes on the Hill at the air mass overall is still on the drier side. What we haven’t had a shortage of today is cloud cover as it’s been overcast all day to this point. Temperatures are gradually rising from the low 30s early this morning to the low 40s early this afternoon. The dew point has been holding in the upper 20s all day, indicative of the dry air in place. Winds have been fairly steady out of the southwest on average. The average speed for the day so far is around 13mph. Gusts have increased in frequency and intensity since the mid morning hours. The peak gust so far is 32mph, which occurred around 12:15Pm. Visibility started the day around 70 miles, but has decreased to around 40 miles by late this morning thanks in part to the snow showers and increasing haziness as warmer air overruns the cooler air near the surface. The maximum temperature so far today is 41F degrees, which is 10 degrees below the normal high of 51F. The minimum temperature since midnight is 30F degrees, which is 5 degrees below the normal low of 35F. ————————————————————– Today’s Observations: 7 A.M. Weather: Overcast nimbostratus, few stratocumulus distant NE-SE-SW, virga all quadrants Temperature: 35F; Dew Point: 27F; Relative Humidity: 73% Wind: SW @ 10G17 kts Sea-level pressure: 1010.4 mb; 29.84 in. Hg: rising unsteadily Visibility: 70 miles 6-hr Max temp: 35F 6-hr Min temp: 30F 24-hr Precip: Trace BHO SA 1155 E80 OVC 70 104/35/27/2310G17/984/ FEW SC DSNT NE-SE-SW VIRGA ALQDS TOTAL NEW SNW PST 24 HRS TRACE/ 8/52/ 52005 70000 10035 20030 10 A.M. Weather: Broken altostratus, overcast altocumulus, few stratocumulus all quadrants, virga all quadrants Temperature: 38F; Dew Point: 27F; Relative Humidity: 63% Wind: SSW @ 10G16 kts Sea-level pressure: 1008.8 mb; 29.79 in. Hg: falling, then more rapidly Visibility: 40 miles 3-hr Precip: Trace BHO SA 1455 E50 BKN 70 OVC 40 088/38/27/2110G16/979/ FEW SC ALQDS VIRGA ALQDS S-B00E04 TOTAL NEW SNW PST 3 HRS TRACE/ 8/57/ 58016 6000/ 1 P.M. Weather: Broken altocumulus/altostratus, broken cirrus, few stratocumulus all quadrants Temperature: 40F Dew Point: 27F; Relative Humidity: 58% Wind: W @ 14G23 kts, peak wind W 32mph at 12:16 P.M. Sea-level pressure: 1006.1 mb; 29.71 in. Hg: falling, then more slowly Visibility: 40 miles, hazy 6-hr Max temp: 41F 6-hr Min temp: 35F 6-hr Precip: Trace BHO SA 1755 E120 BKN 250 BKN 40 061/40/27/2614G23/971/ FEW SC ALQDS HAZY PK WND 2728/16/ TOTAL NEW SNW PST 6 HRS TRACE/ 8/571 56027 6000/ 10041 20035 ————————————————————– SUMMARY FOR TUESDAY, NOVEMBER 11, 2025 TEMPERATURE (DEGREES F) MAX…….37   NORMAL…..52 MIN…….30   NORMAL…..35 MEAN……34   NORMAL…..43 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-9 TOTAL DEPARTURE FOR THE MONTH……………………….+6 [+0.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY…………….31  DEPARTURE……..+9 TOTAL HEATING UNITS FOR THE MONTH……………211  DEPARTURE……..-8 TOTAL HEATING UNITS FOR THE SEASON…………..622  DEPARTURE……-109 TOTAL HEATING UNITS LAST SEASON TO DATE………517  DEPARTURE……+105 COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025) TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0 TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0 TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79 TOTAL COOLING UNITS LAST SEASON TO DATE………768  DEPARTURE…….-12 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 *=Last of multiple occurrences F420C (Official)………..46 WNW  @   01:13 P.M. VECTOR #1 (1-Sec)……….44 WNW  @   01:13 P.M. VECTOR #2 (1-Sec)……….47 WNW  @   01:13 P.M. DAVIS #1……………….45 W    @   01:13 P.M. DAVIS #2 ………………44 WNW  @   01:04 P.M. RMY #1 (Instantaneous)…..47 WNW  @   01:21 P.M. RMY #2 (Instantaneous)…..48 W    @   01:04 P.M. MERLIN…………………41 NW RICHARDS (C5C) (Inst)……45 WNW  @   01:13 P.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………35 WNW  @   01:06 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..30 WNW  @   01:04 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 WNW  @   01:15 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………32 W    @   01:05 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 WNW  @   01:06 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..28 WNW  @   01:06 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..31 WNW  @   01:06 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………30 WNW  @   01:06 P.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..17.7 W [425 total miles] VECTOR #1………………17.4 VECTOR #2………………18.0 DAVIS #1……………….18.4 W DAVIS #2………………….M RMY #1…………………16.4 W RMY #2…………………17.5 W RICHARDS (C5C)………….17.1 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.15 TOTAL PRECIPITATION FOR THE MONTH…………..1.05 DEPARTURE…..-0.56 TOTAL PRECIPITATION FOR THE YEAR (2025)…….43.36 DEPARTURE…..-2.41 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……0.0 TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-0.4 TOTAL SNOWFALL FOR THE SEASON (2025-2026)…..TRACE DEPARTURE…..-1.1 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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 11/1  56/38/47/+0/0.00/0.0/619/100       50 W   VEC1 50 W   RMY 50 11/2  53/33/43/-4/0.00/0.0/617/100       23 WNW VEC1 23 WNW RMY 24 11/3  54/42/48/+2/0.16/0.0/012/02        41 WNW VEC1 41 W   RMY 46 11/4  54/42/48/+2/0.00/0.0/605/99        52 NW  VEC1 52 NW  RMY 54 11/5  56/39/48/+2/0.06/0.0/104/17        50 W   VEC1 47 W   RMY 52 11/6  50/34/42/-3/0.02/T/473/78          48 WNW VEC1 48 WNW RMY 49 11/7  52/31/42/-3/0.04/0.0/448/74        43 SSW VEC1 42 SSW RMY 47 11/8  60/45/53/+8/0.18/0.0/307/51        32 WNW VEC1 33 WNW RMY 33 11/9  61/46/54/+10/0.15/0.0/…/..       33 ESE VEC1 34 ESE RMY 35 11/10 54/36/45/+1/0.44/0.0/…/..        32 W   VEC1 31 W   RMY 31 11/11 37/30/34/-9/T/T/…/..             46 WNW VEC1 44 WNW RMY 47 11/12 The low since midnight is 30F, the daily normal low is 35F. ————————————————————– NOVEMBER DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR NOVEMBER 12 HIGH 74 IN 1909 LOW 18 IN 1926 PRECIP 3.39 INCHES IN 1947 SNOWFALL 8.1 INCHES IN 1987 PEAK GUST 79e MPH NW IN 1947 RECORDS FOR NOVEMBER 13 HIGH 66 IN 1931, 1964 LOW 14 IN 1920 PRECIP 1.96 INCHES IN 1982 SNOWFALL 4.6 IN 2004 PEAK GUST 77 S IN 1982 TODAY’S REPORT PREPARED BY: Matt Douglas
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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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