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Monday, March 24, 2025

March 25, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, MARCH 24, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, MARCH 24, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0540E SUNSET:  1801E A CHILLY RAW DAY SO FAR WITH PERIODS OF RAIN AND A BRISK WIND…. Overcast skies have been the theme with light rain developing early this morning. Periods of mainly light rain have continued into the early afternoon hours with 0.13″ falling through 1pm. There has been no signs of any frozen precipitation here on the summit, but we did get a report of sleet in Hingham just before noon. Snow was also reported in other areas to the north and west this morning. The temperature made it to the mid 30s before the precipitation arrived. It then slip back a bit to around 33F for a time before recovering to the upper 30s early this afternoon. Either way, with the damp weather out there, it feels quite raw. This is in stark contrast to the low 60s we enjoyed just 2 days ago! Winds have been gradually increasing out of mainly a southerly direction. The average speed for the day so far is around 13mph. Gusts have been occasionally exceeding 30mph through the mid to late morning, and into the early afternoon hours. The peak gust so far is 35mph, which occurred at 9:46am. Visibility has been limited most of the day thanks to increasing moisture in the air. The view started at around 40 miles early this morning, but has now decreased to generally under 3 miles by early this afternoon. With stratus fractus clouds drifting over the summit, the visibility has become quite variable, dipping as low as 1/8th of a mile at times. The maximum temperature for today is 39F degrees, which is 8 degrees below the normal high of 47F. The minimum temperature since midnight is 31F degrees, which is 2 degrees above the normal low of 29F. ————————————————————– Today’s Observations: 7 A.M. Weather: Overcast altocumulus/altostratus, few breaks in overcast distant ESE Temperature: 34F; Dew Point: 26F; Relative Humidity: 71% Wind: SSE @ 11G18 kts Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then falling Visibility: 40 miles 6-hr Max temp: 34F 6-hr Min temp: 31F 24-hr Precip:  0.00 inches 24-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1155 E70 OVC 40 188/34/26/1511G18/009/ FEW BINOVC DSNT ESE/ 8/07/ 58020 10034 20031 10 A.M. Weather: Broken stratocumulus, overcast nimbostratus, light rain Temperature: 34F; Dew Point: 33F; Relative Humidity: 95% Wind: S @ 18G30 kts, peak wind SSE 35mph at 9:46 A.M. Sea-level pressure: 1016.3 mb; 30.01 in. Hg: falling, then more rapidly Visibility: 10 miles, thin fog 3-hr Precip:  0.02 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 E11 BKN 22 OVC 10R- 163/34/33/1718G30/001/ THN F ALQDS PK WND 1630/46/ 8/52/ 58025 6002/ 1 P.M. Weather: Sky obscured, vertical visibility 200ft, light rain Temperature: 39F; Dew Point: 39F; Relative Humidity: 100% Wind: SSE @ 13G22 kts Sea-level pressure: 1010.7 mb; 29.85 in. Hg: falling rapidly Visibility: 1 mile, variable 1/8th mile to 3 miles, fog 6-hr Max temp: 39F 6-hr Min temp: 33F 6-hr Precip:  0.13 inches 6-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1755 X W2 1VR-F 107/39/39/1613G22/985/ STFRA DRFTG OVR SMT VSBY 1/8V3 PRESFR/ 8//// 58056 6013/ 10039 20033 ————————————————————– SUMMARY FOR SUNDAY, MARCH 23, 2025 TEMPERATURE (DEGREES F) MAX…….44   NORMAL…..46 MIN…….25   NORMAL…..29 MEAN……35   NORMAL…..38 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3 TOTAL DEPARTURE FOR THE MONTH……………………+144 [+6.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025) TOTAL HEATING UNITS FOR YESTERDAY…………….30  DEPARTURE……..+2 TOTAL HEATING UNITS FOR THE MONTH……………562  DEPARTURE……-146 TOTAL HEATING UNITS FOR THE SEASON………….4743  DEPARTURE……-397 TOTAL HEATING UNITS LAST SEASON TO DATE……..4449  DEPARTURE……+294 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)………..39 WNW  @   12:18 A.M. VECTOR #1 (1-Sec)……….39 NW   @   07:00 A.M. VECTOR #2 (1-Sec)……….42 NW   @   07:00 A.M. DAVIS #1……………….38 WNW  @   08:35 A.M. DAVIS #2 ………………35 NW   @   12:19 A.M. RMY #1 (Instantaneous)…..40 NW   @   07:00 A.M. RMY #2 (Instantaneous)…..41 NW   @   07:00 A.M. MERLIN…………………38 NW RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………30 WNW  @   01:04 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26      @   01:03 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29      @   08:38 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 W    @   01:03 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 NW   @   08:38 A.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 NW   @   05:28 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 WNW  @   08:38 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..14.3 NW [342 total miles] VECTOR #1………………13.7 VECTOR #2………………14.8 DAVIS #1……………….14.3 NW DAVIS #2……………….14.2 NW RMY #1…………………13.4 NW RMY #2…………………14.3 WNW RICHARDS (C5C)…………..OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19 TOTAL PRECIPITATION FOR THE MONTH…………..3.74 DEPARTURE…..-0.37 TOTAL PRECIPITATION FOR THE YEAR (2025)……..9.39 DEPARTURE…..-3.22 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3 TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-12.5 TOTAL SNOWFALL FOR THE SEASON (2024-2025)……34.1 DEPARTURE…..-30.3 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR MARCH 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 3/1    50/21/36/+5/T/T/081/12            46 NW  VEC1 46 NW  RMY 49 3/2    28/14/21/-11/0.00/0.0/672/99      41 NW  VEC1 42 NW  RMY 43 3/3    31/8/20/-12/0.00/0.0/667/98       28 NW  VEC1 28 NW  RMY 31 3/4    48/23/36/+4/0.00/0.0/390/57       41 SW  VEC1 42 SW  RMY 43 3/5    54/41/48/+16/0.52/0.0/021/03      50 SSW VEC1 50 SSW RMY 55 3/6    55/32/44/+11/0.66/T/014/02        69 S   VEC1 69 S   RMY 68 3/7    41/25/33/0/T/T/638/92             60 WNW VEC1 61 WNW RMY 64 3/8    40/27/34/+1/0.00/0.0/619/89       55 W   VEC1 55 W   RMY 58 3/9    45/25/35/+2/0.00/0.0/544/78       40 W   VEC1 39 W   RMY 42 3/10   60/33/47/+13/0.00/0.0/680/97      38 WNW VEC1 38 WNW RMY 39 3/11   62/37/50/+16/0.00/0.0/676/96      39 SSW VEC1 40 SSW RMY 40 3/12   48/32/40/+6/T/T/544/77            29 N   VEC1 29 N   RMY 29 3/13   46/32/39/+5/0.00/0.0/483/68       25 ESE VEC1 26 ESE RMY 25 3/14   54/33/44/+9/0.00/0.0/570/80       22 SSW VEC1 22 SSW RMY 22 3/15   59/37/48/+13/0.00/0.0/358/50      28 S   VEC1 28 S   RMY 28 3/16   67/44/56/+21/0.05/0.0/136/19      56 SSW VEC1 58 SSW RMY 58 3/17   58/38/48/+12/2.12/0.0/000/00      60 SSW VEC1 60 SSW RMY 60 3/18   48/34/41/+5/0.00/0.0/362/50       31 NNW VEC1 31 NNW RMY 32 3/19   52/34/43/+7/0.00/0.0/662/91       18 NE  VEC1 18 NE  RMY 17 3/20   55/36/46/+9/0.03/0.0/…/..       30 S   VEC1 30 S   RMY 30 3/21   46/36/41/+4/0.36/0.0/…/..       48 NW  VEC1 49 NW  RMY 54 3/22   62/33/48/+11/T/0.0/…/..         53 WNW VEC1 52 WNW RMY 58 3/23   44/25/35/-3/0.00/0.0/…/..       39 WNW VEC1 39 NW  RMY 40 3/24 The low since midnight is 31F, the daily normal low is 29F. ————————————————————– MARCH DAILY RECORDS TO DATE 3/16 RECORD HIGH MINIMUM TEMP OF 44F; OLD RECORD WAS 43F IN 1921, 1973 3/17 RECORD PRECIPITATION AMOUNT OF 2.12 INS; OLD RECORD WAS 1.97 INS IN 1968 ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR MARCH 24 HIGH 70 IN 1920 LOW 6 IN 1906 PRECIP 1.51 INS. IN 1956 SNOWFALL 12.3 INS. IN 1956 PEAK GUST 71 MPH W IN 1968 RECORDS FOR MARCH 25 HIGH 76 IN 1910 LOW 8 IN 1888, 1956 PRECIP 1.84 INS. IN 1909 SNOWFALL 1.8 INS. IN 2018 PEAK GUST 69 MPH SE IN 1969 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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