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Saturday, April 1, 2017

April 2, 2017

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 1, 2017 ALL TIMES ARE IN EASTERN STANDARD TIME WINTER STORM CONTINUES ON 20TH ANNIVERSARY OF APRIL FOOL’S BLIZZARD, MARCH 2017 ENDS COOLER THAN WINTER 2016-2017 Today marks the 20th anniversary of the April Fool’s Blizzard of 1997 which left Blue Hill Observatory with 30 inches of snow, half falling on March 31  and half falling on April 1.  Blizzard conditions began on the evening of March 31 and continued through the early morning of April 1. Precip. from the current winter storm measured 1.90 in. at 7:00AM EST this morning with 1.1 in. of frozen precip. in the form of sleet and snow.  A mixture of light rain and snow turned to light rain and sleet before 8:00AM EST and then turned to light snow as temperatures fell throughout the morning.  A total of 2.3 in. of snow and 1.10 in. of liquid precip. were measured at 1:00PM EST. March 2017’s average temperature measured 31.6F which was colder than each of the last three winter months. March has been colder than February of the same year three times in the past, and colder than all three preceding winter months only once before in 1936-1937. PRELIMINARY STATS FOR MARCH 2017 TEMPERATURE, Deg. F Avg. Max. 39.8 [-4.5] Avg. Min. 23.4 [-3.2] Mean      31.6 [-3.9] 24-hour corrected mean: 31.6 Max. for month: 61F on 1st Min. for month:  4F on 12th HEATING DEGREE DAYS Total heating units: 1025 [+109] Total for the season: 4902 [-582] Total for last season: 4419 PRECIPITATION, Inches Total: 4.91 [-0.67] Greatest in 24 hrs: 2.15 on the 14th SNOWFALL, Inches Total: 11.4 [-1.3] Greatest in 24 hrs: 7.3 in. on 14th WIND, mph Avg. uncorrected wind speed: 14.3 Avg. corrected wind speed: 14.6 Prevailing wind direction: W at 18% Peak gust and direction: 60 NE on 14th SUNSHINE: Campbell-Stokes card minutes: 11,490 minutes of possible 21,516 or 53% Astronomical total minutes: 11,899 minutes of possible 22,264 or 53% BHO Lowest Mar-Feb 24-hour Mean Temperature Difference, deg F (1885-2017): 1) -5.4 in 1984 2) -3.1 in 1960 3) -2.2 in 2017 4) -0.3 in 1937 5) +0.8 in 1890 +0.8 in 1997 7) +0.9 in 1939 8) +1.2 in 1954 Today’s Observations: 7 A.M. Weather: Mixed rain and snow, sky obscurement due to fog Temperature: 35F; Dew Point: 35F; Wind: ENE at 17G33 kts, Peak Wind: 33 kts (38 MPH) ENE at 6:51AM EST Sea-level pressure: 29.76 ins. Hg, falling then steady Visibility: 2 miles 6-hr Max temp: 35F 6-hr Min temp: 33F 24-hr precip: 1.90 in. 24-hr snowfall: 1.1 in. BHO SA 1155 W3 X 2S-R-F 077/35/35/0617G33/976/ PK WND 0633/51 NEW SNW PST 24 HRS 1.1 INS/ 8//// 4/001 56010 MANUAL 70190 ASOS 70192 10035 20033 10 A.M. Weather: Light snow, sky obscurement due to fog Temperature: 33F; Dew Point: 33F; Wind: NE at 20G31 kts, Peak Wind: 31 kts (36 MPH) NNE at 9:44AM EST Sea-level pressure: 29.80 ins. Hg, rising, then more slowly Visibility: 1/4 mile 3-hr precip: 0.63 in. 3-hr snowfall: 0.5 in. BHO SA 1455 W3 X 1/4S-F 090/33/33/0420G31/980/ PK WND 0331/44 NEW SNW PST 3 HRS 0.5 INS/ 8//// 51013 MANUAL 6063/ ASOS 60061 1 P.M. Weather: Light snow, sky obscurement due to fog Temperature: 32F; Dew Point: 32F; Wind: N at 19G32 kts, Peak Wind: 32 kts (37 MPH) N at 12:48PM EST Sea-level pressure: 29.89 ins. Hg, falling then rising Visibility: 1/4 mile 6-hr Max temp: 35F 6-hr Min temp: 32F 6-hr precip: 1.10 in. 6-hr snowfall: 2.3 ins. BHO SA 1755 W3 X 1/4S-F 088/32/32/3619G32/989/ PK WND 3632/48 NEW SNW PST 6 HRS 2.3 INS/ 8//// 4/003 56002 MANUAL 6110/ ASOS 60108 10035 20032 SUMMARY FOR FRIDAY, MARCH 31, 2017 TEMPERATURE (DEGREES F) MAX…..37   NORMAL…..49 MIN…..32   NORMAL…..32 MEAN….35   NORMAL…..41 DEPARTURE FROM 30-YEAR NORMAL…………………….-6 TOTAL DEPARTURE FOR THE MONTH…………………..-110 [-3.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY…………..30   DEPARTURE……….+6 TOTAL HEATING UNITS FOR THE MONTH…………1025   DEPARTURE……..+109 TOTAL HEATING UNITS FOR THE SEASON………..4902   DEPARTURE……..-582 TOTAL HEATING UNITS LAST SEASON TO DATE……4419   DIFFERENCE…….+483 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY……………….25 E AT 11:47 P.M. AERO……………………30 E AT 10:15 P.M. ASOS……………………35 E AT 10:14 P.M. DAVIS…………………..18 E AT  4:58 P.M. RMY N/A FASTEST MILE FOR YESTERDAY…………………17 E AT  9:46 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE………………23 E AT 11:28 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 E AT  2:42 P.M. AVERAGE WIND SPEED AND DIRECTION…………..9.1 E ASOS………………….10.2 DAVIS………………….4.5 ESE [115 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.90  DEPARTURE……+0.81 ASOS…………..1.92 TOTAL PRECIPITATION FOR THE MONTH……….4.91  DEPARTURE……-0.67 ASOS…………..5.17 TOTAL PRECIPITATION FOR THE YEAR……….15.10  DEPARTURE……+1.10 ASOS……………N/A *** *** ASOS annual total not available due to erroneous readings SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….1.1  DEPARTURE…….+0.7 TOTAL SNOWFALL FOR THE MONTH……………11.3  DEPARTURE…….-1.4 TOTAL SNOWFALL FOR THE SEASON…………..63.7  DEPARTURE…….+4.0 PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 3/1  61/46/54/+23/0.01/0.0/000/00          41 S   AERO 45 S   RMY 45 3/2  55/26/41/+10/T/T/509/75               58 W   AERO 61 W   RMY 59 3/3  36/19/28/-4/T/T/592/87                38 W   AERO 44 W   RMY N/A 3/4  20/7/14/-18/T/T/622/91                45 NW  AERO 48 NW  RMY 51 3/5  29/5/17/-15/0.00/0.0/687/100          35 WNW AERO 43 WNW*RMY N/A 3/6  40/11/26/-6/0.00/0.0/641/93           18 WNW AERO 17 NW* RMY N/A 3/7  47/29/38/+5/0.01/0.0/000/00           32 S   AERO 35 S   RMY 36 3/8  55/43/49/+16/0.05/0.0/320/46          35 W   AERO 36 W   RMY 37 3/9  49/35/42/+9/0.0/0.0/684/98            53 W   AERO 59 W   RMY 58 3/10 35/20/28/-5/0.27/2.9/000/00           35 WNW AERO 44 WNW RMY 40 3/11 20/7/14/-20/0.02/0.2/612/87           43 W   AERO 47 W   RMY 50 3/12 25/4/15/-19/0.00/0.0/679/96           32 W   AERO 40 WNW RMY N/A 3/13 33/8/21/-13/0.00/0.0/667/94           25 WNW AERO 29 WNW RMY N/A 3/14 38/23/31/-4/2.15/7.3/000/00           60 NE  AERO 62 NE  RMY 62 3/15 27/15/21/-14/0.00/0.0/536/75          36 W   AERO 37 W   RMY N/A 3/16 33/17/25/-10/0.00/0.0/696/97          36 W   AERO 37 W   RMY 38 3/17 40/22/31/-5/0.00/0.0/577/80           25 WNW AERO 24 WNW RMY 27 3/18 36/24/30/-6/0.00/0.0/557/77           26 ENE AERO 24 ENE RMY 26 3/19 35/28/32/-4/0.01/T/153/21             39 N   AERO 37 N   RMY 39 3/20 49/29/39/+2/0.00/0.0/686/94           31 N   AERO 35 N   RMY 36 3/21 52/34/43/+6/0.00/0.0/418/57           28 W   AERO 26 W   RMY N/A 3/22 38/15/27/-10/T/T/603/82               46 NW  AERO 50 NW  RMY 51 3/23 36/13/25/-13/0.00/0.0/716/97          36 WNW AERO 35 WNW RMY 38 3/24 44/25/35/-3/0.02/T/000/00             37 S   AERO 38 S   RMY 39 3/25 44/31/38/0/0.07/…/000/00            22 NE  AERO 20 NE  RMY 21 3/26 42/29/36/-3/0.00/0.0/232/31           25 ENE AERO 23 ENE RMY 25 3/27 43/33/38/-1/0.51/0.0/000/00           22 E   AERO 18 E   RMY N/A 3/28 40/33/37/-2/…./0.0/000/00           16 N   AERO 15 N   RMY N/A TSTM 3/29 46/33/40/0/…./0.0/053/07            37 NW  AERO 36 NW  RMY 37  TSTM 3/30 50/30/40/0/0.00/0.0/659/87            23 NW  AERO 21 NW  RMY N/A 3/31 37/32/35/-6/0.99/1.0/000/00           25 E   AERO 30 E   RMY N/A DAILY RECORDS FOR MARCH 2017 3/11/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 20F, TIES PREVIOUS RECORD SET IN 1885 3/14/17: DAILY RECORD MAXIMUM SNOWFALL OF 7.3 INS, BREAKS PREVIOUS RECORD OF 6.7 INS SET IN 1958 PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 4/1 Low temp since midnight is 33F; normal low is now 32F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 1 HIGH 74 IN 1967 LOW 6 IN 1923 [RECORD FOR MONTH] PRECIP 3.47 IN. IN 2004 [RECORD FOR MONTH] SNOWFALL 15.0 IN. IN 1997 [RECORD FOR MONTH] PEAK GUST 75 MPH SSW IN 1962 RECORDS FOR APRIL 1 HIGH 74 IN 1967 LOW 6 IN 1923 [RECORD FOR MONTH] PRECIP 3.47 IN. IN 2004 [RECORD FOR MONTH] SNOWFALL 15.0 IN. IN 1997 [RECORD FOR MONTH] PEAK GUST 75 MPH SSW IN 1962 TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle / Mike Iacono
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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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