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Monday, July 7, 2025

July 7, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, JULY 7, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, JULY 7, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0415E SUNSET:  1923E HOT AND HUMID CONDITIONS AS A MORE TROPICAL-LIKE AIR MASS MOVES IN…. It looks and feels rather tropical out there today. Sunshine is mixing with a lot of cumulus clouds, some of which are moderate and have developed into rain showers. Despite the warm and humid conditions, the haziness is less today than in previous days. This is an indication that the air mass in place is nearly pure tropical. We can thank former Tropical Storm Chantal for helping to advect a tropical air mass into the region. Hopefully this will also translate into getting a bit of much needed rainfall this week. Temperatures were warm overnight, only dropping to 69F. They quickly warmed up during the morning into the low 80s, and into the mid to upper 80s by early this afternoon, but readings have dropped back to the low 80s thanks to a rain shower. Dew point values have risen as a result as well from the low 70s this morning to the mid 70s early this afternoon, yet another indicator of a tropical air mass reaching the area. The wind was fairly busy out of the southwest and west-southwest, but has become more southerly early this afternoon. The average speed for the day so far is around 13mph. The peak gust so far is 28mph, which occurred just before 10am. Visibility had improved a bit from around 30 miles early this morning to around 40 miles by late morning. However the view has once again decreased thanks to rain showers in the area early this afternoon. The maximum temperature so far today is 88F degrees, which is 7 degrees above the normal high of 81F. The minimum temperature since midnight is 69F degrees, which is 6 degrees above the normal low of 63F. ————————————————————– Today’s Observations: 7 A.M. Weather: Scattered stratus fractus, broken cirrus Temperature: 76F; Dew Point: 72F; Relative Humidity: 85% Wind: SW @ 9G16 kts Sea-level pressure: 1017.4 mb; 30.04 in. Hg: rising, then more slowly Visibility: 30 miles, hazy 6-hr Max temp: 76F 6-hr Min temp: 69F 24-hr Precip:  0.00 inches BHO SA 1155 8 SCT 250 BKN 30 174/76/72/2309G16/004/ HAZY/ 8/704 51006 10076 20069 10 A.M. Weather: Scattered stratocumulus, broken cumulus, broken cirrostratus, broken cirrus Temperature: 82F; Dew Point: 71F; Relative Humidity: 67% Wind: W @ 13G22 kts Sea-level pressure: 1016.9 mb; 30.03 in. Hg: steady, then falling Visibility: 40 miles, hazy 3-hr Precip: 0.00 inches BHO SA 1455 25 SCT E35 BKN 220 BKN 250 BKN 40 169/82/71/2613G22/003/ HAZY/ 8/805 58005 1 P.M. Weather: Scattered cumulus, broken stratocumulus, overcast altocumulus/altostratus, few breaks in overcast N-NE, virga all quadrants Temperature: 80F Dew Point: 76F; Relative Humidity: 85%; Wind: SW @ 12G20 kts Sea-level pressure: 1016.6 mb; 30.02 in. Hg: falling, then steady Visibility: 30 miles, 6 miles SSE-S, 15 miles W-NNW, hazy 6-hr Max temp: 88F 6-hr Min temp: 76F 6-hr Precip:  0.01 inches BHO SA 1755 25 SCT E40 BKN 65 OVC 30 166/80/76/2212G20/002/ FEW BINOVC N-NE FEW LWR STFRA ALQDS MDT CU ALQDS HIER CLDS VSBL N-NE VIRGA ALQDS RW-B21E31 VSBY 6 SSE-S 15 W-NNW HAZY/ 8/87/ 56003 6001/ 10088 20076 ————————————————————– SUMMARY FOR SUNDAY, JULY 6, 2025 TEMPERATURE (DEGREES F) MAX…….92  NORMAL…..81 MIN…….65  NORMAL…..63 MEAN……79  NORMAL…..72 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+7 TOTAL DEPARTURE FOR THE MONTH………………………+23 [+3.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE………0 TOTAL HEATING UNITS FOR THE MONTH……………..0  DEPARTURE……..-2 TOTAL HEATING UNITS FOR THE SEASON…………….0  DEPARTURE……..-2 TOTAL HEATING UNITS LAST SEASON TO DATE………..0  DEPARTURE………0 COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025) TOTAL COOLING UNITS FOR YESTERDAY…………….14  DEPARTURE……..+7 TOTAL COOLING UNITS FOR THE MONTH…………….63  DEPARTURE…….+21 TOTAL COOLING UNITS FOR THE SEASON…………..263  DEPARTURE…….+82 TOTAL COOLING UNITS LAST SEASON TO DATE………225  DEPARTURE…….+38 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)……….E29 SW   @   02:51 P.M. VECTOR #1 (1-Sec)……….29 SW   @   02:51 P.M. VECTOR #2 (1-Sec)……….30 WSW  @   03:09 P.M. DAVIS #1……………….27 SW   @   02:51 P.M. DAVIS #2 ………………28 S    @   03:39 P.M. RMY #1 (Instantaneous)…..29 SW   @   02:51 P.M. RMY #2 (Instantaneous)…..30 SSW  @   02:46 P.M. MERLIN…………………27 SW RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………20 SW   @   06:02 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19      @   03:40 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21      @   03:40 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 SW   @   03:47 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 SSW  @   03:40 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SW   @   02:52 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW  @   03:40 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..13.2 SW [316 total miles] VECTOR #1………………13.2 VECTOR #2………………13.7 DAVIS #1……………….12.8 SW DAVIS #2……………….13.6 SW RMY #1…………………13.1 SW RMY #2…………………13.8 SW RICHARDS (C5C)…………..OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11 TOTAL PRECIPITATION FOR THE MONTH…………..0.19 DEPARTURE…..-0.48 TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.42 DEPARTURE…..-4.48 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 7/1   90/68/79/+8/0.14/411/45           38 W   VEC1 38 W   RMY 41 TSTM 7/2   85/69/77/+6/0.02/247/27           23 WSW VEC1 24 WSW RMY 24 7/3   88/63/76/+4/0.03/…/..           39 SW  VEC1 39 SW  RMY 40 TSTM 7/4   80/60/70/-2/0.00/…/..           28 NNW VEC1 27 NNW RMY 29 7/5   83/61/72/0/0.00/…/..            23 W   VEC1 23 W   RMY 24 7/6   92/65/79/+7/0.00/…/..           29 SW  VEC1 29 SW  RMY 29 7/7 The low since midnight is 69F, the daily normal low is 63F. ————————————————————– JULY DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JULY 7 HIGH 97F IN 1908,1993 LOW 48F IN 1902 PRECIP 2.11 INS IN 1966 PEAK GUST 63 MPH NW IN 2021 RECORDS FOR JULY 8 HIGH 95F IN 1981 LOW 50F IN 1919 PRECIP 1.74 INS IN 1916 PEAK GUST 46e SSW IN 1941 TODAY’S REPORT PREPARED BY: MFD
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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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