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Tuesday, June 18, 2024

June 18, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JUNE 18, 2024 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JUNE 18, 2024 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0407E SUNSET:  1924E HAZY SUNSHINE, HOT, AND HUMID AS THE MUCH ANTICIPATED HEATWAVE BEGINS…. Day 1 of the expected heatwave has begun as we have reached the low 90s today under hazy sunshine. A thin layer of broken cirrus has been covering the sky all day, adding to the milky appearance to the air. Cumulus clouds have also popped up early this afternoon as the convective temperature has been reached. Today of course is the first 90F degree temperature of the season, the first of what I suspect may be many this summer. Stay tuned! The record high for today is 93F set in 1929 and 1994, while we’re getting close, I don’t think we’ll make it today. However we will be watching the records for tomorrow and Thursday closely as we have a better shot of tying or exceeding those. The record for tomorrow is 92F set in 1923, and the record for Thursday is 94F set in 1953. Humidity levels are flirting with oppressive territory as the dew point has reached 71F today. This is of course the highest dew point of the season so far as well. Definitely a day to take it easy if you must be outdoors. The better bet is to remain indoors with air conditioning. In either case, staying hydrated is very important on days like this. Unfortunately, the wind has been on the light side today, thus offering little or no ventilation. It’s been mainly out of the southwest averaging at around 11mph for the day so far, however this average is a bit misleading as it was windier during the predawn hours than it has been during the mid morning hours onward. The peak gust so far is 23mph, which occurred just after 1am this morning. Visibility has been limited most of the day due to haziness. The view has been between decreasing from 30 miles early this morning to only 20 miles by early this afternoon. The maximum temperature so far today is 91 degrees, which is 15 degrees above the normal high of 76F. The minimum temperature since midnight is 64F, which is 5 degrees above the normal low of 59F. With this June heatwave taking shape, here is the ranking for longest June Heatwaves here at Blue Hill, as compiled by our Chief Scientist Mike Iacono. BHO Longest June Heatwaves, days (1885-2023): 1) 4, 3-6 June 1925 (93/94/91/95) 4, 7-10 June 2008 (91/91/94/98) 3) 3, 3-5 June 1919 (98/99/92) 3, 19-21 June 1923 (92/91/90) 3, 13-15 June 1956 (92/93/92) 3, 8-10 June 1984 (94/92/92) 3, 13-15 June 1988 (93/92/94) 3, 27-29 June 1991 (91/95/91) 3, 17-19 June 1994 (91/93/90) 3, 26-28 June 1999 (90/93/91) 3, 20-22 June 2012 (93/94/93) 3, 6-8 June 2021 (91/92/92) 3, 28-30 June 2021 (93/95/94) ————————————————————– Today’s Observations: 7 A.M. Weather: Thin broken cirrus, few altocumulus distant NW-ESE Temperature: 70F; Dew Point: 65F; Relative Humidity: 82% Wind: WSW @ 8 kts Sea-level pressure: 1023.8 mb; 30.23 in. Hg: rising, then more slowly Visibility: 30 miles, hazy 6-hr Max temp: 70F 6-hr Min temp: 64F 24-hr Precip:  0.00 inches BHO SA 1155 E250 -BKN 30 238/70/65/2508/023/ FEW AC DSNT NW-ESE HAZY/ 8/051 51015 10070 20064 10 A.M. Weather: Thin broken cirrus Temperature: 82F; Dew Point: 70F; Relative Humidity: 67% Wind: SSW @ 4 kts, wind light Sea-level pressure: 1024.5 mb; 30.25 in. Hg: rising, then more slowly Visibility: 25 miles, hazy 3-hr Precip:  0.00 inches BHO SA 1455 E250 -BKN 25 245/82/70/2104/025/ HAZY WND LGT/ 8/001 51007 1 P.M. Weather: Scattered cumulus, thin scattered cirrus Temperature: 91F; Dew Point: 71F; Relative Humidity: 52% Wind: SSW @ 7 kts Sea-level pressure: 1023.5 mb; 30.22 in. Hg: falling unsteadily Visibility: 20 miles, hazy 6-hr Max temp: 91F 6-hr Min temp: 70F 6-hr Precip:  0.00 inches BHO SA 1755 45 SCT 250 -SCT 20 235/91/71/2107/022/ HAZY HX 98/ 8/201 57010 10091 20070 ————————————————————– SUMMARY FOR MONDAY, JUNE 17, 2024 TEMPERATURE (DEGREES F) MAX…….80   NORMAL…..76 MIN…….56   NORMAL…..58 MEAN……68   NORMAL…..67 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1 TOTAL DEPARTURE FOR THE MONTH…………………….+40 [+2.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024) TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-2 TOTAL HEATING UNITS FOR THE MONTH……………11  DEPARTURE…….-43 TOTAL HEATING UNITS FOR THE SEASON…………5390  DEPARTURE……-809 TOTAL HEATING UNITS LAST SEASON TO DATE…….5279  DEPARTURE……+111 COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024) TOTAL COOLING UNITS FOR YESTERDAY…………….3  DEPARTURE……..-1 TOTAL COOLING UNITS FOR THE MONTH……………40  DEPARTURE……..-5 TOTAL COOLING UNITS FOR THE SEASON…………..77  DEPARTURE……..+5 TOTAL COOLING UNITS LAST SEASON TO DATE………68  DEPARTURE……..+9 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)……….E30 SSW  @   03:08 P.M. VECTOR #1 (1-Sec)……….31 SSW  @   04:22 P.M. VECTOR #2 (1-Sec)……….31 SSW  @   12:46 P.M. DAVIS #1……………….33 S    @   03:09 P.M. DAVIS #2 ………………35 S    @   01:46 P.M. RMY #1 (Instantaneous)…..31 SSW  @   03:00 P.M. RMY #2 (Instantaneous)…..33 SSW  @   03:21 P.M. MERLIN…………………28 SW RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………23 SSW  @   03:21 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22      @   03:22 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23      @   03:22 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 S    @   03:21 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 S    @   03:22 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 SSW  @   03:23 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SSW  @   03:22 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……13.9 SSW [334 total miles] VECTOR #1…………….13.9 VECTOR #2…………….14.8 DAVIS #1……………..13.4 SSW DAVIS #2……………..14.8 SSW RMY #1……………….13.7 SSW RMY #2……………….15.0 SSW RICHARDS (C5C)…………OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17 TOTAL PRECIPITATION FOR THE MONTH…………..1.38 DEPARTURE…..-1.38 TOTAL PRECIPITATION FOR THE YEAR (2024)…….32.20 DEPARTURE…..+6.84 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 6/1   79/53/66/+4/0.00/878/97             18 WNW VEC1 20 NW  RMY 20 6/2   83/52/68/+6/0.00/780/86             21 W   VEC1 21 W   RMY 21 6/3   78/57/68/+6/0.00/626/69             22 NE  VEC1 22 NE  RMY 21 6/4   75/55/65/+2/0.00/817/90             20 SSW VEC1 19 SSW RMY 19 6/5   84/56/70/+7/T/564/62                29 SW  VEC1 28 SW  RMY 29 6/6   74/60/67/+4/0.01/064/07             20 SSE VEC1 20 SSE RMY 20 6/7   80/60/70/+6/0.14/410/45             26 WNW VEC1 27 WNW RMY 27 6/8   73/54/64/0/T/767/84                 48 W   VEC1 49 W   RMY 47 6/9   67/55/61/-3/0.25/292/32             29 WNW VEC1 28 WNW RMY 26 6/10  75/54/65/0/T/868/95                 28 W   VEC1 27 W   RMY 27 6/11  71/53/62/-3/0.00/320/35             16 WNW VEC1 15 WNW RMY 15 6/12  76/59/68/+3/0.00/531/58             16 S   VEC1 16 SSE RMY 17 6/13  82/57/70/+4/0.00/…/..             28 SW  VEC1 27 SW  RMY 28 6/14  84/63/74/+9/0.75/…/..             50 NW  VEC1 50 NW  RMY 53 TSTM 6/15  75/54/66/0/0.23/…/..              23 NNW VEC1 27 NW  RMY 26 6/16  72/51/62/-5/0.00/…/..             22 SSE VEC1 23 S   RMY 23 6/17  80/56/68/+1/0.00/…/..             30 SSW VEC1 31 SSW RMY 31 6/18 The low since midnight is 64F, the daily normal low is 59F. ————————————————————– JUNE DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JUNE 18 HIGH 93F IN 1929, 1994 LOW 39F IN 1920 PRECIP 3.36 INS 1998 PEAK GUST 48e MPH W IN 1943 RECORDS FOR JUNE 19 HIGH 92F IN 1923 LOW 40F IN 1920 PRECIP 3.92 INS 1922 PEAK GUST 66e MPH NW IN 1940 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

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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

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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.

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§ 03

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§ 04

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“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

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§ 06

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§ 07

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§ 08

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Part II — Privacy Policy
§ 09–10

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§ 13

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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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