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Thursday, January 2, 2025

January 2, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JANUARY 2, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JANUARY 2, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0713E SUNSET:  1624E VERY WINDY AND CHILLIER TODAY UNDER MAINLY SUNNY SKIES…. We have some rather strong cold air advection taking place today coinciding with a rather tight pressure gradient. This is a recipe for strong winds and so far today has not disappointed in that regard. On the bright side (no pun intended), there has been plenty of sunshine today after the gloomy weather of the past couple of days. Temperatures are still above normal today, but are cooler than they’ve been the past week or so. We have just reached the low 40s between noon and 1pm after starting the day in the low to mid 30s. The slow rise in temperature is a good sign of the cold air advection taking place, attempting to fight off heating from the sun and the added heating from the west wind downsloping toward coastal areas. Another indicator of the cold air advection is the lower dew point values, which today have remained in the teens. Of course the wind is the big story today. The west to west- northwesterly breeze has been averaging around 23mph for the day so far. We’ve seen frequent gusts over 50mph over the past few hours. The peak gust so far is 60mph which occurred at 11:59am. Visibility has been excellent all day, rising from 60 miles early this morning to 80 miles by early this afternoon. The maximum temperature for today is 41F degrees, which is 5 degrees above the normal high of 36F. The minimum temperature since midnight is 33F degrees, which is 12 degrees above the normal low of 21F. As with many other recent years, 2024 ended up warmer than average. Below are the years with the warmest annual 24-hour mean temperature, as compiled by our chief scientist, Mike Iacono. BHO Warmest Annual Approximated 24-Hour Mean Temperature, deg F (1885-2024): 1) 51.7 in 2012 2) 51.5 in 2023 3) 51.3 in 2020 51.3 in 2024 5) 51.2 in 2016 6) 51.1 in 2022 7) 51.0 in 2010 8) 50.9 in 1999 50.9 in 2021 ————————————————————– PRELIMINARY STATS FOR DECEMBER 2024 TEMPERATURE, Deg. F Avg. Max. 40.4 [+0.2] Avg. Min. 25.5 [+0.6] Mean      33.0 [+0.5] 24-hour corrected mean: 32.9 Max. for month: 62F on the 11th Min. for month:  4F on the 23rd HEATING DEGREE DAYS Total heating units:    989 [-017] Total for the season:  1932 [-278] Total for last season: 1895 COOLING DEGREE DAYS Total cooling units:      0 [ 000] Total for the season:   768 [+091] Total for last season:  715 PRECIPITATION, Inches Total: 7.58 [+2.19] Greatest in 24 hrs: 3.43 on the 11th-12th SNOWFALL, Inches Total: 12.6 [ 0.0] Greatest in 24 hrs: 9.4 on the 20th WIND, mph Avg. uncorrected wind speed: 11.4 mph Avg. corrected wind speed:   11.9 mph Prevailing wind direction:   West [13%] Peak gust and direction:  65 SSW on the 11th SUNSHINE: Campbell-Stokes card minutes: 9264 of a possible 16470, or 56% Astronomical total minutes: 9558 of a possible 16999 or 56% ————————————————————– Today’s Observations: 7 A.M. Weather: Scattered altocumulus/altostratus, few stratocumulus distant all quadrants Temperature: 33F; Dew Point: 19F; Relative Humidity: 57% Wind: W @ 19G28 kts, peak wind W 44mph at 6:30 A.M. Sea-level pressure: 1003.1 mb; 29.62 in. Hg: rising, then more rapidly Visibility: 60 miles 6-hr Max temp: 36F 6-hr Min temp: 33F 24-hr Precip:  0.17 inches 24-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1155 95 SCT 60 031/33/19/2819G28/962/ FEW SC DSNT ALQDS PK WND 2838/30/ 8/570 53019 70017 10036 20033 10 A.M. Weather: Clear, few stratocumulus distant all quadrants, few altocumulus distant WNW-N-E, few cirrus distant NW-N-E Temperature: 37F; Dew Point: 18F; Relative Humidity: 46% Wind: W @ 22G42 kts, peak wind W 48mph at 9:49 A.M. Sea-level pressure: 1005.4 mb; 29.69 in. Hg: rising, then more slowly Visibility: 80 miles 3-hr Precip:  0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 CLR 80 054/37/18/2822G42/969/ FEW SC ALQDS FEW AC DSNT WNW-N-E FEW CI DSNT NW-N-E PK WND 2842/49/ 8/551 51023 1 P.M. Weather: Scattered stratocumulus, few cirrus distant NW-NNE Temperature: 41F; Dew Point: 18F; Relative Humidity: 39% Wind: WNW @ 24G44 kts, peak wind W 60mph at 11:59 A.M. Sea-level pressure: 1004.4mb; 29.66 in. Hg: falling, then rising Visibility: 80 miles 6-hr Max temp: 41F 6-hr Min temp: 33F 6-hr Precip:  0.00 inches 6-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1755 45 SCT 80 044/41/18/2924G44/966/ FEW CI DSNT NW-NNE PK WND 2852/59/ 8/501 55010 10041 20033 ————————————————————– SUMMARY FOR WEDNESDAY, JANUARY 1, 2025 TEMPERATURE (DEGREES F) MAX…….47  NORMAL…..36 MIN…….36  NORMAL…..21 MEAN……42  NORMAL…..29 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………+13 TOTAL DEPARTURE FOR THE MONTH……………………+13 [+12.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025) TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE…….-14 TOTAL HEATING UNITS FOR THE MONTH……………23  DEPARTURE…….-14 TOTAL HEATING UNITS FOR THE SEASON…………1955  DEPARTURE……-291 TOTAL HEATING UNITS LAST SEASON TO DATE…….1929  DEPARTURE…….+26 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)………..44 W    @   10:25 P.M. VECTOR #1 (1-Sec)……….45 W    @   10:25 P.M. VECTOR #2 (1-Sec)……….41 W    @   10:25 P.M. DAVIS #1……………….44 W    @   10:25 P.M. DAVIS #2 ………………41 W    @   10:25 P.M. RMY #1 (Instantaneous)…..44 W    @   10:25 P.M. RMY #2 (Instantaneous)…..44 W    @   10:25 P.M. MERLIN………………….M RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………29 W    @   11:46 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29      @   10:27 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28      @   10:27 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 W    @   10:27 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW  @   09:52 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 WNW  @   10:27 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 W    @   10:27 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..12.9 WNW [309 total miles] VECTOR #1………………12.7 VECTOR #2………………13.2 DAVIS #1……………….13.3 W DAVIS #2……………….12.9 WNW RMY #1…………………12.3 WNW RMY #2…………………13.0 WNW RICHARDS (C5C)…………..OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.17 DEPARTURE…..+0.02 TOTAL PRECIPITATION FOR THE MONTH…………..0.55 DEPARTURE…..+0.40 TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.55 DEPARTURE…..+0.40 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6 TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.6 TOTAL SNOWFALL FOR THE SEASON (2024-2025)……12.6 DEPARTURE……-3.1 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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 12/1   37/23/30/-7/0.00/0.0/452/81        21 WSW VEC1 21 WSW RMY 21 12/2   38/22/30/-7/0.00/0.0/551/99        18 W   VEC1 18 W   RMY 18 12/3   36/20/28/-8/0.00/0.0/411/74        21 NW  VEC1 21 WNW RMY 21 12/4   39/22/31/-5/0.13/T/394/71          30 S   VEC1 31 S   RMY 33 12/5   37/31/34/-2/0.40/3.0/072/13        43 WNW VEC1 43 WNW RMY 47 12/6   31/23/27/-8/0.00/0.0/514/93        39 NW  VEC1 39 W   RMY 42 12/7   37/22/30/-5/T/T/408/74             25 S   VEC1 25 S   RMY 26 12/8   47/28/38/+3/0.02/T/198/36          37 SSW VEC1 37 SSW RMY 40 12/9   47/34/41/+7/0.41/0.0/187/34        28 ENE VEC1 28 E   RMY 29 12/10  42/31/37/+3/0.15/0.0/000/00        31 NE  VEC1 32 NE  RMY 34 12/11  62/36/49/+15/3.38/0.0/000/00       65 SSW VEC1 67 SSW RMY 70 TSTM 12/12  53/25/39/+5/0.05/0.0/460/84        51 WNW VEC1 49 WNW RMY 51 12/13  31/19/25/-8/0.00/0.0/514/94        30 WNW VEC1 30 W   RMY 30 12/14  33/17/25/-8/0.00/0.0/546/100       20 NW  VEC1 19 NNW RMY 20 12/15  34/17/26/-7/0.00/0.0/377/69        17 N   VEC1 17 N   RMY 16 12/16  45/29/37/+5/T/0.0/005/01           35 SSE VEC1 35 SSE RMY 35 12/17  59/41/50/+18/0.25/0.0/360/66       48 SSW VEC1 50 SSW RMY 50 12/18  50/36/43/+11/0.57/0.0/507/93       21 S   VEC1 21 S   RMY 21 12/19  44/30/37/+5/0.13/0.0/425/78        31 NW  VEC1 31 NW  RMY 32 12/20  32/24/28/-3/1.17/9.4/000/00        28 NNE VEC1 29 N   RMY 29 12/21  26/12/19/-12/0.00/0.0/262/48       38 NW  VEC1 38 NW  RMY 41 12/22  17/6/12/-19/0.00/0.0/544/100       33 NW  VEC1 33 NW  RMY 35 12/23  26/4/15/-16/0.00/0.0/420/77        21 S   VEC1 21 SSW RMY 20 12/24  31/19/25/-5/0.02/0.2/082/15        29 WSW VEC1 29 WSW RMY 30 12/25  31/20/26/-4/0.00/0.0/540/99        18 NNW VEC1 19 NNW RMY 21 12/26  38/23/31/+1/0.00/0.0/240/44        15 N   VEC1 15 N   RMY 15 12/27  42/21/32/+2/0.00/0.0/480/88        20 SSW VEC1 20 SSW RMY 21 12/28  45/31/38/+9/0.18/0.0/000/00        21 SW  VEC1 21 SSW RMY 21 12/29  53/44/49/+20/0.05/0.0/000/00       32 S   VEC1 33 S   RMY 31 12/30  56/42/49/+20/0.67/0.0/126/23       40 S   VEC1 43 S   RMY 45 12/31  53/37/45/+16/0.00/0.0/…/..       29 E   VEC1 29 E   RMY 28 1/1 The low since midnight is 41F, the daily normal low is 21F. ————————————————————– DECEMBER DAILY RECORDS TO DATE 12/11 NEW PRECIPITATION RECORD OF 3.38″; OLD RECORD 2.36″ IN 1992 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 1/1    47/36/42/+13/0.55/0.0/…/..       44 W   VEC1 45 W   RMY 44 1/2 The low since midnight is 33F, the daily normal low is 21F. ————————————————————– JANUARY DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JANUARY 2 HIGH 62F IN 1890 LOW -7F IN 1899,1918 PRECIP 2.10 INS. IN 1987 SNOWFALL 10.9 INS. IN 2014 PEAK GUST 85e MPH S IN 1942 RECORDS FOR JANUARY 3 HIGH 64F IN 2000 LOW -4F IN 1904 PRECIP 1.93 INS. IN 1999 SNOW 11.3 INS. 1996 PEAK GUST 92 MPH S IN 1960 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:

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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
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§ 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

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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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