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Tuesday, April 23, 2024

April 23, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, APRIL 23, 2024 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, APRIL 23, 2024 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0450E SUNSET:  1835E ANOTHER VERY NICE DAY FOLLOWING EARLY MORNING FOG…. We have another very nice day in progress after early morning dense fog burned off. Some high thin cirrus clouds are visible to the distance east through south, part of a large intensifying ocean storm well offshore. Some cirrus can also be seen to the distant west as well, part of the next frontal system that will impact the area tomorrow. Otherwise, sunshine has been the theme today. We had another chilly start to the day as well with readings in the mid 30s early this morning. Temperatures have warmed nicely into the low 60s early this afternoon however, making for a fine spring day (especially for New England standards). The dew point isn’t as low as yesterday, but its still on the dry side with values falling into the low 30s. The wind was fairly steady, but on the light side this morning, mainly out of a south or south-southwest direction. However as the diurnal heating maximizes early this afternoon, mixing from aloft has caused the wind to increase in speed. The average speed for the day to this point is around 9mph, but is trending upwards in the last couple of hours. Gusts have been reaching mainly between 20-25mph in the last couple of hours as well. The peak gust so far today is 26mph, which occurred just after 11:30am. Visibility has improved markedly from early this morning. The view was at 1/4 mile or less, but reached up to 60 miles by mid morning and continues at that value early this afternoon. The maximum temperature so far today is 63F degrees, which is 3 degrees above the normal high of 60F. The minimum temperature since midnight is 37F degrees, which is 4 degrees below the normal low of 41F. ————————————————————– Today’s Observations: 7 A.M. Weather: Overcast stratus, few breaks in overcast all quadrants, stratus fractus drifting over summit, sun dimly visible Temperature: 40F; Dew Point: 40F; Relative Humidity: 100% Wind: S @ 7 kts Sea-level pressure: 1023.7 mb; 30.23 in. Hg: rising, then more rapidly Visibility: 1/4 mile, fog 6-hr Max temp: 40F 6-hr Min temp: 37F 24-hr Precip:  0.00 inches 24-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1155 E1 OVC 1/4F 237/40/40/1707/023/ FEW BINOVC ALQDS STFRA DRFTG OVR SMT SUN DMLY VSBL/ 8/6// 53018 10040 20037 10 A.M. Weather: Clear, few cumulus distant S-SSW, few cirrus distant ENE-S and distant W-NW Temperature: 56F; Dew Point: 33F; Relative Humidity: 42% Wind: SSW @ 7 kts Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then more rapidly Visibility: 60 miles 3-hr Precip:  0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 CLR 60 227/56/33/2007/020/ FEW CU DSNT S-SSW FEW CI DSNT ENE-S AND DSNT W-NW/ 8/201 58010 1 P.M. Weather: Clear, few cirrus distant NE-S and distant WSW-WNW Temperature: 60F; Dew Point: 30F; Relative Humidity: 30% Wind: S @ 10G20 kts Sea-level pressure: 1019.8 mb; 30.11 in. Hg: falling, then more slowly Visibility: 60 miles 6-hr Max temp: 63F 6-hr Min temp: 40F 6-hr Precip:  0.00 inches 6-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1755 CLR 60 198/60/30/1910G20/011/ FEW CI DSNT NE-S AND DSNT WSW-WNW/ 8/001 56029 10063 20040 ————————————————————– SUMMARY FOR MONDAY, APRIL 22, 2024 TEMPERATURE (DEGREES F) MAX…….57   NORMAL…..59 MIN…….34   NORMAL…..41 MEAN……46   NORMAL…..50 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-4 TOTAL DEPARTURE FOR THE MONTH……………………+29 [+1.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024) TOTAL HEATING UNITS FOR YESTERDAY……………19  DEPARTURE……..+4 TOTAL HEATING UNITS FOR THE MONTH…………..411  DEPARTURE…….-21 TOTAL HEATING UNITS FOR THE SEASON…………5052  DEPARTURE……-727 TOTAL HEATING UNITS LAST SEASON TO DATE…….4856  DEPARTURE……+196 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all Main Tower. E=Estimated F420C (Official)……….E29 NW   @  08:14 A.M. VECTOR #1 (1-Sec)……….29 NW   @  08:14 A.M. VECTOR #2 (1-Sec)……….30 NW   @  08:19 A.M. DAVIS #1……………….27 NW   @  08:14 A.M. DAVIS #2 ………………26 NNW  @  08:18 A.M. RMY #1 (Instantaneous)…..29 NW   @  08:14 A.M. RMY #2 (Instantaneous)…..30 NW   @  08:19 A.M. MERLIN…………………27 NW RICHARDS (C5C) (Inst)……28      @  08:14 A.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………23 NW   @  08:19 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18      @  10:01 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20      @  08:21 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NW   @  08:19 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NNW  @  08:21 A.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 NW   @  08:17 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NNW  @  10:01 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19      @  08:17 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……10.3 NW [246 total miles] VECTOR #1…………….10.3 VECTOR #2…………….10.8 DAVIS #1……………..10.4 WNW DAVIS #2……………..10.4 NW RMY #1………………..9.8 WNW RMY #2……………….10.6 WNW RICHARDS (C5C)………..10.6 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15 TOTAL PRECIPITATION FOR THE MONTH…………..4.26 DEPARTURE…..+0.66 TOTAL PRECIPITATION FOR THE YEAR (2024)…….24.31 DEPARTURE…..+6.69 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1 TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-2.0 TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-42.8 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR APRIL 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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) 4/1   56/40/48/+7/0.00/0.0/153/20         20 SSE VEC1 20 SSE RMY 19 4/2   47/35/41/0/0.07/0.0/115/15          25 E   VEC1 25 E   RMY 25 4/3   41/34/38/-4/1.10/T/000/00           53 E   VEC1 53 E   RMY 53 4/4   36/32/34/-8/1.25/0.7/000/00         63 ENE VEC1 64 ENE RMY 68 4/5   45/31/38/-5/0.01/T/147/19           33 WNW VEC1 31 WNW RMY 33 4/6   43/33/38/-5/0.08/093/12             35 N   VEC1 35 N   RMY 35 4/7   48/34/41/-3/T/0.0/094/12            32 N   VEC1 31 N   RMY 31 4/8   66/36/51/+7/0.00/0.0/636/81         23 WNW VEC1 23 WNW RMY 22 4/9   63/40/52/+8/0.00/0.0/741/94         22 ENE VEC1 21 ENE RMY 21 4/10  65/38/52/+7/T/0.0/348/44            26 S   VEC1 26 S   RMY 30 4/11  55/42/49/+4/0.04/0.0/000/00         32 SSE VEC1 32 SSE RMY 31 4/12  60/46/53/+7/1.03/0.0/032/04         62 SSE VEC1 62 S   RMY 63 4/13  54/43/49/+3/T/0.0/271/34            43 W   VEC1 42 WNW RMY 46 4/14  58/42/50/+3/0.09/0.0/384/48         33 WSW VEC1 33 WSW RMY 35 4/15  73/43/58/+11/T/0.0/764/95           33 NW  VEC1 33 NW  RMY 34 4/16  68/44/56/+9/0.00/0.0/759/94         29 NW  VEC1 28 NW  RMY 29 4/17  60/40/50/+2/0.00/0.0/656/81         25 ESE VEC1 24 ESE RMY 24 4/18  47/40/44/-4/0.21/0.0/…/..         25 E   VEC1 25 E   RMY 23 4/19  60/41/51/+2/T/0.0/…/..            29 S   VEC1 29 S   RMY 29 4/20  57/40/49/0/0.38/0.0/…/..          34 WNW VEC1 37 WNW RMY 39 4/21  50/34/42/-8/0.00/0.0/…/..         30 NW  VEC1 30 WNW RMY 31 4/22  57/34/46/-4/0.00/0.0/…/..         29 NW  VEC1 29 NW  RMY 29 4/23 The low since midnight is 37F, the daily normal low is 41F. ————————————————————– APRIL DAILY RECORDS TO DATE NONE… ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR APRIL 23 HIGH 85 IN 1908, 2007 LOW 25 IN 1933,1989 PRECIP 1.99 IN. IN 2012 SNOWFALL 0.5 IN. IN 1911, 1956 PEAK GUST 64 MPH WNW IN 1962 RECORDS FOR APRIL 24 HIGH 82 IN 2001 LOW 22 IN 1930 PRECIP 2.51 INS IN 1898 SNOWFALL 1.2 INS IN 1967 PEAK GUST 59 MPH NW IN 1962 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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