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Sunday, August 4, 2013

August 4, 2013

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

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, AUGUST 4, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME COOL CLEAR MORNING LIGHT WIND AND SCATTERED CLOUD COVER PREVALENT THROUGHOUT THE DAY JULY 2013 AVERAGE VAPOR PRESSURE AND DEW POINT HIGHEST ON RECORD… Today got off to a beautiful start with clear sky, temperatures in the mid 60s and visibility of 75 miles. Light wind out of the WNW averaged just under 5 mph and scattered cumulus increased cloud cover throughout the day. In addition to having the warmest average minimum temperature on record, July 2013 also had the highest average vapor pressure on record of 23.5 mb, and the highest average dew point on record of 68F.  Vapor pressure is an absolute measure of the amount of water vapor in the air, while the dew point (a related parameter) is a temperature that also reflects the atmospheric moisture content. Starting 8/3/2013, these discussions will provide information on the daily, monthly and seasonal cooling degree day units, which are a measure of the degree to which the daily mean temperature is warmer than 65 deg F over a cooling season.  A cooling degree day is recorded as the integer difference between the daily mean temperature and 65 deg F, when the mean temperature is higher than 65 deg F.  The cooling degree day season extends from January to December. Additional July statistics can be found below. JULY 2013 PRELIMINARY STATISTICS: (departures relative to 1981-2010 average) TEMPERATURE: Average Max Temp:  83.2F [+2.4F] Average Min Temp:  66.9F [+4.0F] Mean Temp:  75.1F [+3.2F] 24-hr. Corr. Mean Temp:  74.1F [+3.3F] Max Temp:  95F on 19th Min Temp:  57F on 25th Total heating degree day units (month):      6   [-3] *NCDC method Total heating degree day units (season):     6   [-3] *start July 1 (NCDC) Total cooling degree day units (month):    327 [+105] *NCDC method Total cooling degree day units (season):   483 [+132] *start Jan 1 (NCDC) PRECIPITATION: Total precipitation:  3.09 inches [-0.93 inch] Greatest 24-hr precipitation:  1.03 on 25th/26th WIND: Avg wind speed:  9.5 MPH Avg corrected wind speed:  10.1 MPH Prevailing wind direction: SW [12%] Peak gust: 38 MPH SSW on 7th Peak fastest mile: 32 MPH SSW on 7th SUNSHINE: Astronomical minutes: 14,428 of a possible 27,729 or 52% Sun card minutes: 13,884 of a possible 26,682 or 52% BHO Warmest July’s, deg F (1885-2013) 1) 75.1 in 2010 2) 74.9 in 1952 3) 74.1 in 1994 74.1 in 2013 5) 74.0 in 2011 6) 73.8 in 1999 7) 73.5 in 1949 8) 73.2 in 2012 BHO Warmest July Average Minimum Temperature, deg F (1885-2013) 1) 66.9 in 2013 2) 65.9 in 2010 3) 65.6 in 1994 4) 65.3 in 2006 5) 65.1 in 2008 BHO Greatest Number of 90-Degree Days per Month, (1885-2013) 1) 14 in July 1952 2) 13 in August 2002 3) 10 in August 1944 10 in July 1949 10 in July 1963 10 in July 2010 10 in July 2013 8)  9 in July 1911 9 in August 1928 10) 8 in August 1949 8 in July 1963 8 in July 1988 BHO July Greatest CDD Total, deg F (1885-2013) 1) 355 in 2010 2) 342 in 1952 3) 329 in 1994 4) 327 in 2013 5) 313 in 1949 6) 308 in 1999 7) 303 in 1911 BHO July Highest Vapor Pressure, mb (1932-2013) 1) 23.5 in 2013    (DP: 68F) 2) 22.5 in 1994    (DP: 67F) 3) 21.7 in 2006    (DP: 66F) 4) 21.3 in 1988    (DP: 65F) 5) 21.2 in 1955    (DP: 65F) 21.2 in 1975    (DP: 65F) 7) 21.0 in 1967    (DP: 65F) BHO Monthly Highest Vapor Pressure, mb (1932-2013) 1) 23.5 in July 2013 2) 22.5 in July 1994 3) 21.7 in July 2006 4) 21.6 in August 1937 5) 21.5 in August 1988 6) 21.3 in July 1988 Today’s Observations: 7 A.M. Weather: Clear with few thin cirrus all quads, altocumulus distant NNW-E-S Temperature: 64F; Dew Point: 57F; Wind: NW at 8 kts Sea-level pressure: 29.84 ins. Hg, decreasing then increasing Visibility: 75 miles, light distant haze 24-hr precip: Trace 6-hr max. temp: 64 6-hr min. temp: 59F BHO SA 1155 120 SCT 250 -SCT 75 105/64/57/3108/984/ AC DSNT NNW-E-S FEW CI ALQDS LGT DSNT HZ/ 8/041 53007 MANUAL 7000/ 10064 20059 10 A.M. Weather: Clear, few cumulus fractus in the vicinity of the observatory and distant WSW-N, few cirrus/cirrocumulus in the vicinity of the observatory and distant W-NNE and ESE-SSE, moderate and towering cumulus distant WSW-NW Temperature: 74F; Dew Point: 56F; Wind: NW at 6 kts. Sea-level pressure: 29.83 ins. Hg, decreasing then increasing Visibility: 75 miles, light distant haze BHO SA 1455 220 SCT 250 -SCT 75 103/74/63/3206/983/ FEW CUFRA VCTY STN AND DSNT WSW-N MDT CU AND TCU DSNT WSW-NW FEW CI/CC VCTY STN AND DSNT W-NNE AND ESE-SSE LGT DSNT HZ/ 8/209 55002 1 P.M. Weather: Scattered cumulus and cumulus fractus, few cirrus in the vicinity of the observatory and offshore NE-ESE Temperature: 76F; Dew Point: 55F; Wind: WNW at 8 kts Sea-level pressure: 29.80 ins. Hg, increasing then decreasing Visibility: 75 miles, light distant haze 6-hr max. temp: 76F 6-hr min. temp: 64F BHO SA 1755 100 SCT 250 –SCT 75 092/76/55/2908/980/ FEW TCU AND MDT CU ALQDS FEW CI VCTY STN AND DSNT NE-ESE LGT DSNT HZ/ 8/201 58011 10076 20064 WEATHER SUMMARY FOR SATURDAY, AUGUST 3, 2013 TEMPERATURE (DEGREES F) MAX…..77     NORMAL…..81 MIN…..63     NORMAL…..63 MEAN….70     NORMAL…..72 DEPARTURE FROM 30-YEAR NORMAL……………….-2 TOTAL DEPARTURE FOR THE MONTH……………….-2 [-0.9 DEGREE/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY………….5    DEPARTURE………-3 TOTAL COOLING UNITS FOR THE MONTH…………19    DEPARTURE………-3 TOTAL COOLING UNITS FOR THE SEASON……….502    DEPARTURE…….+129 TOTAL COOLING UNITS LAST SEASON TO DATE…..475    DIFFERENCE…….+27 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY…………….22 WSW   AT  11:35 A.M. AERO…………………23 WSW   AT  11:35 A.M. ASOS…………………23 SW    AT  11:35 A.M. DAVIS………………..22 W     AT   8:14 A.M. RMY 23 FASTEST MILE FOR YESTERDAY………………17 WSW   AT  11:40 A.M.* MAXIMUM 2-MINUTE ASOS AVERAGE……………17 SW    AT  11:40 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE…………..17 SW    AT  11:40 A.M. AVERAGE WIND SPEED AND DIRECTION………..11.1 WSW ASOS………………..10.4 DAVIS………………..9.9 SW [234 deg.] * Last of multiple occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….TRACE  DEPARTURE…………-0.15 ASOS…………..0.00 TOTAL PRECIPITATION FOR THE MONTH……….0.24   DEPARTURE…………-0.21 ASOS…………..0.23 TOTAL PRECIPITATION FOR THE YEAR……….35.53   DEPARTURE…………+4.09 ASOS…………..N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals PRELIMINARY CLIMATE SUMMARY FOR JULY & AUGUST 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized 7/1  82/69/76/+6/0.05/247/27         29 S   AERO 31 MPH SSW RMY 32 7/2  82/61/72/+2/T/100/11            23 SSW AERO 23 MPH SSW RMY 25 7/3  87/62/75/+4/T/556/61            28 SW  AERO 30 MPH SW  RMY 30 7/4  90/71/81/+10/0.00/811/89        25 WSW AERO 26 MPH SW  RMY 28 7/5  92/73/83/+12/0.00/874/96        24 W   AERO 25 MPH WSW RMY 25 7/6  90/73/82/+11/0.00/836/92        25 WNW AERO 25 MPH WNW RMY 26 7/7  91/72/82/+11/0.21/508/56        38 SSW AERO 43 MPH SSW RMY 44  TSTM 7/8  82/64/73/+1/0.04/617/68         18 NE  AERO 20 MPH NE  RMY 20  TSTM 7/9  72/63/68/-4/0.01/054/06         14 ENE AERO 14 MPH ENE RMY 14 7/10 84/65/75/+3/T/335/37            32 S   AERO 36 MPH S   RMY 35 7/11 79/69/74/+2/0.62/009/01         23 W   AERO 23 MPH W   RMY N/A TSTM 7/12 70/62/66/-6/0.00/162/18         29 NE  AERO 29 MPH NE  RMY 30 7/13 75/62/69/-3/0.08/009/01         21 ENE AERO 20 MPH ENE RMY N/A 7/14 89/71/80/+8/0.00/477/53         16 W   AERO 16 MPH W   RMY 16 7/15 91/72/82/+10/0.00/665/74        17 NW  AERO 16 MPH NW  RMY 18 7/16 91/71/81/+9/0.00/843/94         18 NNW AERO 16 MPH NNW RMY 16 7/17 93/74/84/+12/0.00/841/94        22 SW  AERO 23 MPH SW  RMY 25 7/18 90/75/83/+11/0.00/724/81        20 S   AERO 21 MPH S   RMY 22 7/19 95/76/86/+14/0.00/723/81        36 WSW AERO 38 MPH WSW RMY 38 7/20 93/72/83/+11/0.00/570/64        29 W   AERO 30 MPH W   RMY 31  TSTM 7/21 82/68/75/+3/0.00/568/64         16 NE  AERO 16 MPH NE  RMY 17 7/22 80/67/74/+2/T/514/58            17 NE  AERO 17 MPH NE  RMY 19  TSTM 7/23 82/68/75/+3/0.82/159/18         35 WSW AERO 36 MPH WSW RMY 39 7/24 84/64/74/+2/0.00/627/71         23 N   AERO 23 MPH N   RMY 23 7/25 64/57/61/-11/0.43/000/00        24 NNE AERO 24 MPH NNE RMY 25 7/26 67/59/63/-9/0.70/000/00         23 NNW AERO 23 MPH N   RMY 23 7/27 82/60/71/-1/0.00/535/61         22 S   AERO 23 MPH S   RMY 23 7/28 78/66/72/0/0.03/149/17          16 ENE AERO 16 MPH ENE RMY 15 7/29 81/66/74/+2/0.10/402/46         20 S   AERO 18 MPH S   RMY 21  TSTM 7/30 81/61/71/-1/0.00/766/88         20 WNW AERO 18 MPH WNW RMY 20 7/31 80/61/71/-1/0.00/747/86         16 S   AERO 15 MPH S   RMY 16 8/1  81/62/72/0/0.01/…/..          25 S   AERO 26 MPH S   RMY 27 8/2  81/62/72/0/0.23/…/..          26 W   AERO 26 MPH W   RMY 28 8/3  77/63/70/-2/T/…/..            22 WSW AERO 23 MPH WSW RMY 23 8/4 morning low temp: 59F; the normal low is now 63F DAILY RECORDS FOR JULY 2013 7/14 – TIED DAILY RECORD HIGH MINIMUM TEMPERATURE OF 71F; ties previous record of 71F set in 1997 7/15 – NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 72F; surpasses previous record of 70F set in 1901, 1934, 1995 7/16 – TIED DAILY RECORD HIGH MINIMUM TEMPERATURE OF 71F; ties previous record of 71F set in 1901, 1958, 1968 7/17 – TIED DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F; ties previous record of 74F set in 1900 7/18 – NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F; surpasses previous record of 73F set in 1900, 1999 7/19 – NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F; surpasses previous record of 72F set in 1949, 1991, 2005 DAILY RECORDS FOR AUGUST 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 4 HIGH 95F IN 1928 LOW 48F IN 1900 PRECIP 1.68 INS IN 1983 PEAK GUST 48 MPH SW IN 1974 RECORDS FOR AUGUST 5 HIGH 98F IN 1955 LOW 48F IN 1929,1972 PRECIP 3.03 INCHES IN 1893 PEAK GUST 60e MPH SW 1977 TODAY’S REPORT PREPARED BY: Forrest Iwanik
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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
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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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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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