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Wednesday, August 13, 2025

August 13, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, AUGUST 13, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, AUGUST 13, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0450E SUNSET:  1848E FOGGY CONDITIONS IN THE AM, FOLLOWED BY MORE HUMID AIR BY AFTERNOON…. This morning we were in the clouds, as heavy fog was over Blue Hill this morning. By 10am, the fog was still present, though visibility was marginally better. After the fog lifted, scattered cirrus was seen and some distant thunderstorms to our west and north were visible. We remained dry though, although rain would be welcome since we haven’t had any precipitation since August 1st! Temperatures were slow to warm today, mostly due to the fog and overcast conditions for much of the morning. Because of that, we just slightly missed out on a heat wave, unless we manage 90F by this afternoon. At 86F now, it isn’t looking very promising. The dew points have been a bit higher than yesterday, so although the temperatures have been lower, it has felt warmer. Dew points have been in the upper 60s to low 70s today. The wind has been out of the south-southwest for much of the day, bringing warm, moist air with it. The average speed for the day so far is around 10mph. The peak gust so far for the day has reached 22mph, which occurred at 1:22pm. Visibility was heavily impacted by the foggy conditions this morning and only slightly improved after the fog lifted. We were able to get between 15-25 miles of visibility due to continued hazy conditions. The maximum temperature so far today is 86F degrees, which is 5 degrees above the normal high of 81F. The minimum temperature since midnight is 66F degrees, which is 3 degrees above the normal low of 63F. ————————————————————– Today’s Observations: 7 A.M. Weather: Sky obscured, vertical visibility 200 ft Temperature: 69F; Dew Point: 68F; Relative Humidity: 96% Wind: SW @ 8 kts Sea-level pressure: 1014.3 mb; 29.95 in. Hg: falling, then rising Visibility: 1/2 mile 6-hr Max temp: 69F 6-hr Min temp: 66F 24-hr Precip:  0.00 inches BHO SA 1155 X W2 1/2F 143/69/68/2208/995/ 8//// 55000 10069 20066 10 A.M. Weather: Overcast stratocumulus Temperature: 76F; Dew Point: 71F Relative Humidity: 85% Wind: SSW @ 10 kts Sea-level pressure: 1013.5 mb; 29.93 in. Hg: falling, then more slowly Visibility: 15 miles, thin fog all quadrants 3-hr Precip: 0.00 inches BHO SA 1455 E12 OVC 15 135/76/71/2110/993/ THN F ALQDS/ 8/5// 56008 1 P.M. Weather: Thin scattered cirrus, few cumulonimbus distant NNW, few cumulus SSW-NW Temperature: 86F Dew Point: 70F; Relative Humidity: 60% Wind: SSW @ 10 kts Sea-level pressure: 1011.8 mb; 29.88 in. Hg: steady, then falling Visibility: 25 miles, hazy 6-hr Max temp: 86F 6-hr Min temp: 69F 6-hr Precip:  0.00 inches BHO SA 1755 250 -SCT 25 118/86/70/1910/988 FEW CB DSNT NNW FEW CU SSW-NW HAZY/ 8/901 58017 10086 20069 ————————————————————– SUMMARY FOR TUESDAY, AUGUST 12, 2025 TEMPERATURE (DEGREES F) MAX…….93   NORMAL…..81 MIN…….68   NORMAL…..63 MEAN……81   NORMAL…..72 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+9 TOTAL DEPARTURE FOR THE MONTH……………………….-9 [-0.6 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…………….1  DEPARTURE……..-9 TOTAL HEATING UNITS LAST SEASON TO DATE………..2  DEPARTURE……..-1 COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025) TOTAL COOLING UNITS FOR YESTERDAY…………….16  DEPARTURE……..+9 TOTAL COOLING UNITS FOR THE MONTH…………….84  DEPARTURE……..-8 TOTAL COOLING UNITS FOR THE SEASON…………..595  DEPARTURE……+116 TOTAL COOLING UNITS LAST SEASON TO DATE………609  DEPARTURE…….-14 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)………..21 SSW  @   05:49 P.M. VECTOR #1 (1-Sec)……….21 SSW  @   05:49 P.M. VECTOR #2 (1-Sec)……….21 SSW  @   05:12 P.M. DAVIS #1……………….19 S    @   05:14 P.M. DAVIS #2 ………………18 S    @   05:14 P.M. RMY #1 (Instantaneous)…..21 SSW  @   05:12 P.M. RMY #2 (Instantaneous)…..23 SSW  @   04:52 P.M. MERLIN…………………19 SW RICHARDS (C5C) (Inst)……19      @   04:59 P.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………15 SSW  @   05:14 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15      @   05:14 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17      @   05:13 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 W    @   12:23 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 SSW  @   05:14 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 SSW  @   05:13 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 SSW  @   05:13 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14      @   12:23 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL………9.6 WSW [231 total miles] VECTOR #1……………….9.9 VECTOR #2………………10.3 DAVIS #1………………..9.9 WSW DAVIS #2……………….10.1 WSW RMY #1………………….9.5 WSW RMY #2…………………10.3 WSW RICHARDS (C5C)…………..9.7 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13 TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..-1.14 TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-2.39 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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 8/1   71/57/64/-9/0.44/546/63            28 NE  VEC1 28 NE  RMY 27 8/2   75/54/65/-8/0.00/838/97            18 NNW VEC1 18 NNW RMY 18 8/3   83/59/71/-2/0.00/784/91            21 SSW VEC1 21 SSW RMY 21 8/4   84/61/73/0/0.00/757/88             17 W   VEC1 17 W   RMY 17 8/5   73/62/68/-5/0.00/480/56            28 NE  VEC1 27 NE  RMY 28 8/6   77/61/69/-4/0.00/248/29            17 ENE VEC1 17 ENE RMY 16 8/7   81/61/71/-2/0.00/…/..            18 ESE VEC1 18 ESE RMY 17 8/8   83/61/72/0/0.00/…/..             21 SSW VEC1 21 SSW RMY 21 8/9   83/60/72/0/0.00/…/..             22 S   VEC1 22 SSW RMY 22 8/10  89/61/75/+3/0.00/…/..            22 S   VEC1 22 S   RMY 21 8/11  94/67/81/+9/0.00/…/..            20 W   VEC1 19 W   RMY 19 8/12  93/68/81/+9/0.00/…/..            21 SSW VEC1 21 SSW RMY 21 8/13 The low since midnight is 66F, the daily normal low is 63F. ————————————————————– AUGUST DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR AUGUST 13 HIGH 98F IN 1944, 2002 LOW 47F IN 1902, 1957 PRECIP 2.92 INCHES IN 1989 PEAK GUST 52 MPH SSE IN 1963 RECORDS FOR AUGUST 14 HIGH 99F IN 2002 LOW 46F IN 1964 PRECIP 3.06 INCHES IN 1919 PEAK GUST 61 MPH WNW IN 1963 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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