Sign In Become a Member
Donate
Daily Discussions

Wednesday, May 17, 2023

May 17, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, MAY 17, 2023 ALL TIMES ARE…

Agreement required — click “Accept & Continue” below to review and accept the Data Use & Privacy Policy

Access to this content requires acceptance of our Data Use & Privacy Policy.

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

WEDNESDAY, MAY 17, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0421E
SUNSET:  1901E

SUNNY AND BRISK CONDITIONS ON BLUE HILL TODAY…

Plenty of sunshine today at Blue Hill with considerably cooler
temperatures than yesterday. The smoke layer from the wildfires
in Alberta, Canada have moved from our area, however, the pollen
continues to reduce visibility.

Temperatures have been below normal today, as of this afternoon
we still haven’t reached 60F. Relative humidity has continued
to drop throughout the day as well with dew points, making for
very dry air. This has resulted in the region being under a Red
Flag Warning due to the high fire danger.

The wind has been relatively productive today, with an average
speed of around 20mph for the day so far. Gusts have been
exceeding 30mph at times.

Visibility remains to be limited to 40 miles today, despite the
clear skies and low dew points, primarily because of the pollen
in the air.

The high so far today is 59F, which is 8 degrees below our
normal max temperature of 67F. Our low since midnight is 46F,
which is 3 degrees below our normal low temperature of 49F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus all quadrants, few altocumulus
distant NNE-SSW, few cirrus distant SE-S
Temperature: 48F; Dew Point: 30F; Relative Humidity: 48%
Wind: N @ 17G26 kts, peak wind NNW 32 mph @ 6:20am
Sea-level pressure: 1005.0 mb; 29.68 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 54F
6-hr Min temp: 46F
24-hr Precip:  0.00 ins.
BHO SA 1155 CLR 40 050/48/30/3517G26/968/ FEW SC ALQDS FEW
AC DSNT NNE-SSE FEW CI DSNT SE-S PK WND 3428/20/ HAZY/
8/571 51025 10054 20046

10 A.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 53F; Dew Point: 27F; Relative Humidity: 36%
Wind: NNW @ 15G30 kts, peak wind NNW 35 mph @ 9:50am
Sea-level pressure: 1006.8 mb; 29.73 in. Hg: rising, then more rapidly
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
BHO SA 1455 CLR 40 068/53/27/3415G30/973/ FEW SC ALQDS PK
WND 3430/50/ HAZY/ 8/500 53018

1 P.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 57F; Dew Point: 24F; Relative Humidity: 27%
Wind: NNW @ 16G27 kts, peak wind NNW 31 mph @ 12:47pm
Sea-level pressure: 1007.7mb; 29.76 in. Hg: rising unsteadily
Visibility: 40 miles, hazy
6-hr Max temp: 59F
6-hr Min temp: 48F
6-hr Precip:  0.00 ins.
BHO SA 1755 CLR 40 077/57/24/3316G27/976/ FEW SC ALQDS PK
WND 3327/47/ HAZY/ 8/500 52009 10059 20048

————————————————————–

SUMMARY FOR TUESDAY, MAY 16, 2023

TEMPERATURE (DEGREES F)
MAX…….80   NORMAL…..67
MIN…….55   NORMAL…..48
MEAN……68   NORMAL…..58

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+10
TOTAL DEPARTURE FOR THE MONTH………………..+51 [+3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH…………..106  DEPARTURE…….-54
TOTAL HEATING UNITS FOR THE SEASON…………5077  DEPARTURE……-970
TOTAL HEATING UNITS LAST SEASON TO DATE…….5528  DEPARTURE……-451

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….3  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………16  DEPARTURE……..+8
TOTAL COOLING UNITS FOR THE SEASON…………..25  DEPARTURE…….+14
TOTAL COOLING UNITS LAST SEASON TO DATE………24  DEPARTURE……..+1

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)……….E38 SW  @  04:46 P.M.
VECTOR #1 (1-Sec)……….42 SW  @  04:46 P.M.
VECTOR #2 (1-Sec)……….41 W   @  04:07 P.M.
DAVIS #1……………….38 WSW @  04:08 P.M.
DAVIS #2 ………………37 W   @  04:07 P.M.
RMY #1 (Instantaneous)…..41 WSW @  03:25 P.M.
RMY #2 (Instantaneous)…..40 WSW @  04:45 P.M.
MERLIN…………………37 WSW
RICHARDS (C5C) (Inst)……41     @  04:45 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 WSW @  03:51 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25     @  04:47 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27     @  03:32 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 WSW @  04:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 WSW @  04:08 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 WSW @  04:47 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 WSW @  03:52 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26     @  03:44 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………15.8 WSW [379 total miles] VECTOR #1……………….15.3
VECTOR #2……………….15.8
DAVIS #1………………..15.8 WSW
DAVIS #2………………..16.0 W
RMY #1………………….15.0 WSW
RMY #2………………….15.6 WSW
RICHARDS (C5C)…………..14.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.45 DEPARTURE…..-1.45
TOTAL PRECIPITATION FOR THE YEAR…………..18.65 DEPARTURE…..-2.03

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……34.9 DEPARTURE…..-34.8

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR MAY 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

5/1   63/45/54/+1/0.04/0.0/540/64         44 SSE  VEC1 46 SSE RMY 48
5/2   57/43/50/-4/0.22/0.0/144/17         33 S    VEC1 34 S   RMY 35
5/3   55/42/49/-5/0.01/0.0/093/11         25 E    VEC1 25 E   RMY 25
5/4   45/40/43/-11/0.07/0.0/009/01        29 NE   VEC1 29 NE  RMY 29
5/5   59/43/51/-4/0.07/0.0/367/43         18 NE   VEC1 19 NE  RMY 19
5/6   74/43/59/+4/0.00/0.0/847/99         25 NW   VEC1 26 NW  RMY 26
5/7   78/52/65/+10/0.01/0.0/789/92        26 WNW  VEC1 27 W   RMY 28
5/8   74/49/62/+7/0.03/0.0/800/93         32 NW   VEC1 33 NW  RMY 35
5/9   60/45/53/-3/0.00/0.0/819/95         24 NE   VEC1 25 NE  RMY 25
5/10  72/51/62/+6/0.00/0.0/830/96         25 WSW  VEC1 26 WSW RMY 26
5/11  81/53/67/+11/T/0.0/729/84           30 W    VEC1 30 W   RMY 30
5/12  84/57/71/+14/T/0.0/687/79           31 WNW  VEC1 35 WNW RMY 34
5/13  81/58/70/+13/0/0.0/715/82           28 NNW  VEC1 30 NNW RMY 35
5/14  66/47/57/0/0.00/0.0/822/94          28 NNW  VEC1 29 NNW RMY 31
5/15  72/45/59/+2/0.00/0.0/675/77         33 W    VEC1 35 W   RMY 34
5/16  80/55/68/+10/0.00/0.0/…/..        38 SW   VEC1 39 SW  RMY 41

5/17 The low since midnight is 46F, the daily normal low is 48F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR MAY 17
HIGH 90F IN 2017
LOW 34F IN 1956, 1957
PRECIP 2.07 INS IN 1916
PEAK GUST 52 MPH SW IN 1967, W IN 1974

RECORDS FOR MAY 18
HIGH 96F IN 2017(RECORD FOR MAY)
LOW 35F IN 2002
PRECIP 1.93 INS IN 2007
SNOW TRACE IN 2002 (Ice pellets)
PEAK GUST 64 MPH SSW IN 2000

TODAY’S REPORT PREPARED BY: Amanda Joly

facebookShare on Facebook
TwitterPost on X
FollowFollow us
PinterestSave
←
→
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
↓ Scroll to read the full Policy — the agreement checkbox will unlock at the bottom
Main Menu