Wednesday June 23 2021 Forecast (7:45AM)

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DAYS 1-5 (JUNE 23-27)

An early summer polar air mass has arrived from Canada via the Great Lakes, chasing out the early week’s humidity and yesterday’s rainfall. High pressure builds across the Great Lakes today sending the refreshing air in on a northwesterly breeze. High pressure moves right over the region later tonight and Thursday with light wind, allowing an afternoon sea breeze in coastal areas Thursday. Both days will feature a lot of sunshine, but there will be a canopy of high cloudiness across Cape Cod for a while today, a few passing fair weather clouds will pop up and cross the sky in the prevailing wind especially over interior locations during the late morning and afternoon today, and some patches of high and mid level clouds will start to move up from the south later Thursday as we see the first signs of returning warm air above us, though these should not take away from the day’s beauty, and may only add some color for sunset at least in southern areas Thursday evening. Later Thursday night and Friday there will be more extensive cloud cover and a few passing showers are possible as a warm front lifts northward through the region. You’ll notice a bit of an up-tick in humidity on Friday but with cloudiness and a southeasterly wind for a while, temperatures will be held in check. But the warmth will come in with more force during the course of the weekend, along with increased humidity, as high pressure anchors itself off the Mid Atlantic Coast in the western Atlantic and a frontal boundary makes a feeble but failing attempt to move in from the northwest, stopping well short of making itself felt. Other than the chance of a pop up air mass shower or thunderstorm mostly well to the west and north of Boston Saturday and Sunday, it is likely to be a rain-free weekend.

TODAY: High cloudiness far southeastern MA filtering the sun morning before brighter sun takes over in these areas midday and afternoon. Sunshine and passing clouds elsewhere. Highs 73-80. Dew point in the 40s. Wind NW 5-15 MPH.

TONIGHT: Clear. A few fog patches possible interior lower elevations. Lows 48-55. Dew point in the 40s. Wind NW under 10 MPH becoming variable.

THURSDAY: Sunny through mid afternoon. Patchy clouds later in the day. Highs 77-84, coolest coast. Dew point rising slightly to lower 50s. Wind variable up to 10 MPH with coastal sea breezes developing.

THURSDAY NIGHT: Partly cloudy. Lows 56-63. Dew point holding in lower 50s. Wind variable under 10 MPH becoming SE.

FRIDAY: Variably cloudy. A passing shower possible. Highs 75-82, cooler in some coastal locations. Dew point rising toward 60. Wind SE 5-15 MPH.

FRIDAY NIGHT: Mostly cloudy. Chance of showers. Fog patches forming. Lows 61-68. Dew point lower 60s. Wind S up to 10 MPH.

SATURDAY: Partly to mostly sunny. Highs 83-90, cooler South Coast / Cape Cod. Dew point in the 60s. Wind SW 5-15 MPH.

SATURDAY NIGHT: Partly cloudy. Slight chance of an isolated shower or thunderstorm far western areas early. Patchy fog interior lower elevations. Lows 65-72, warmest urban areas. Dew point lower to middle 60s. Wind SW up to 10 MPH.

SUNDAY: Mostly sunny to partly cloudy. Slight chance of a late-day shower or thunderstorm mainly hilly terrain far west and northwest of Boston. Highs 85-92. Dew point middle 60s. Wind SW 5-15 MPH.

DAYS 6-10 (JUNE 28 – JULY 2)

Latest trend is for high pressure offshore to hold a cold front back to the west and north of the region that will only gradually make its way in with the help of a couple disturbances moving along a weakened jet stream to the north. The basic result is minimal risk of any afternoon showers and t-storms early in the period with a slightly better chance mid to late period. Day-to-day details can’t be determined this far in advance. Temperatures should run generally above normal.

DAYS 11-15 (JULY 3-7)

A weak or washed out frontal boundary hangs around early in the period and dissipates with minimal chances for showers/thunderstorms with warm and at least moderately humid conditions. A stronger disturbance may approach later in the period with an increased chance for showers/thunderstorms. Temperatures near to above normal.

43 thoughts on “Wednesday June 23 2021 Forecast (7:45AM)”

  2. 0.91 inch at Logan yesterday.

    It took forever for the lower dewpoints to arrive. The dewpoint at Logan was still 61 as of the 11:00 pm newscast.

    I noticed that we have lost a full minute already on the sunrise and gained a full minute on the sunset. Oh well. 😉

  4. Thank you, TK.

    The 0.91 measured at Logan must be wrong. I’m a few miles from Logan and my gauge says 2.18. Flooded out the courtyard, trash area, and water came into the boiler room. This was a lot of rain over a relatively brief period. While there can be some differences in rainfall between here and Logan it’s generally minimal.

    1. Mine said 1.91
      I have been suspicious of the Logan rain gauge for some time now.
      Mine “may” need to be recalibrated. So my 1.91 might be
      something like 1.6,1.65, 1.7 or so. Still WAY above that
      Logan reading.

      I watched it rain. there was WAAAAAAAAAAAAAAAAAAAAY more than .91 inch here. Logan can take their rain gauge
      and dump it in the harbor!!!!!

        1. I do not know. I do know that Logan is located in
          East Boston and Winthrop is not East Boston, although there is only a bit of water from the end of a runway to
          Winthrop. 🙂

  7. Thanks TK. Looks like June will will be regarded as a hot month but wondered if you had any outlook for July and August. The forecast makes me wish I had rented on the Cape next week versus later in August.

  10. Thanks, TK…

    First full official of school summer vacation!

    Joshua: I caught your post of the Spanish weather forecast on WUNI. Indeed, tormenta is a great word for storm! There are others: tempestad (tempest); borrasca (which I’ve seen a lot from Spain); and I’ve heard temporal (temporary) used in Puerto Rican Spanish.

    We use other Spanish words in our English weather vocabulary: tornado comes from the Spanish verb “tornar” which means to turn. Hurricane comes from the Spanish word “juracán” which is phonetic from the Taino native word for tropical storm.

    Derecho is Spanish for straight for straight-line thunderstorm winds.

    To say “it’s raining hard” in Spanish is “llover a cántaros” (“to rain pitchers or jugs”)…Pouring from pitchers.

    I once had a student translate “raining cats and dogs” literally into Spanish which means little domestic animals were falling out of the sky. Idioms from one language to another usually don’t work in their respective languages.

    That made me think why we say “raining cats and dogs” in the first place. That is such an odd expression that we take for granted.

    The teacher, nerd and “word guy” in me made me research the phrases and I came up with this (according to historyextra.com):

    1) Cats and dogs used to cuddle into thatched roofs during storms, only to be washed out during heavy rains. Considering how a well-maintained thatched roof is actually fairly waterproof, the animals would have to be cowering on the outside, so this wouldn’t have been a great hiding place in a storm. This theory makes for a nice story, but is probably apocryphal.

    2) In Norse mythology, Odin, the father-god responsible for storms, was often depicted with dogs and wolves representing winds. According to folklore, witches rode their brooms during storms, accompanied by their black cats, so that image took on the connotations of heavy rains for sailors. Odin and witches could be responsible for the expression.

    We may have the words entirely wrong, and instead we should be saying ‘cata doxa’
    3) We may have the words entirely wrong, and instead we should be saying ‘cata doxa’. This Greek expression means ‘contrary to experience or belief’, which an actual storm featuring falling cats and dogs certainly would be.

    4) Finally, we could be using a derived form of the now-obsolete word ‘catadupe’. In old English, this meant a cataract or waterfall. Versions of this word existed in many ancient languages, like the Ancient Greek κατάδουποι, referring to a cataract of the River Nile. So when we say it’s raining cats and dogs, we might be suggesting that it is raining waterfalls.

    We will probably never know the exact origin of the phrase, but the eccentricity of the image behind it adds to the creative, unpredictable nature of English as a language.

    This article was taken from BBC History Revealed magazine

    1. First official “day” of summer vacation! 🙂 And what a perfect weather day it is!!!!!

  12. A couple of things:

    1. The 0.91″ at Logan yesterday – completely legit. There was a sharp cutoff to the heavy rain right along the Charles River. Most of the locations around Cambridge/Somerville/Malden only had 0.75-0.90″ yesterday, while locations in and just south of Boston had 1.00-1.75″. To see this data, use the link I gave a few days ago for the map. On the “Observations” tab, change Station Plot to Precipitation, and change the time from 1 hour to 36 hours. You’ll see all the obs for yourself.

    2. My total yesterday was 1.37″

    3. The GFS continues it’s assault in the Northwest, now calling for 110 in Seattle on Monday and 122 in Portland. Both of these would obliterate the all-time record highs on each location. In Spokane, where the all-time record high is 108, the GFS has highs of 110 on Monday, 113 on Tuesday, 112 on Wednesday, 114 on Thursday, and 109 on Friday.

    1. I didn’t see this before I posted above. I Checked stations close to Logan which is when I saw Winthrop also has 0.91. But it looked like a cutoff to me when I saw some others. It isn’t too unusual to have that here also. Thanks for confirming.

      Some…not all…I found …

      Winthrop has 0.91 also. South Boston Naval Annex has 1.08. Quincy 0.74. Nahant 0.85, downtown Boston 1.80

    2. Yes. Fits in with what I observed on radar. The nature of convection is very much like that. Sharp gradients / sharp cutoffs.

      Curious to see what does transpire in the PNW on Monday…
      Pete L. would be having a field day with this if he were still with us.

    3. It sure looks as if there may be some records broken. I’m enjoying following some of the folks out there. This caught my attention.

      https://twitter.com/scottseattlewx/status/1407694600605552646?s=21

      Sak, I’m trying to figure the year we were in Spokane. Macs sister lived there for a few years while flying out of Salt Lake City. I’m thinking July 1994….may be 95 or 96 but more focused on 94. It was unbearably hot complete with a dust storm we sat out in because we had no idea what it was. Do you have a link that shows historic Spokane temps?

      1. I’m pretty sure it was 1994 because that July 100 sticks out for Seattle in my head from my days working my gig at the private company. I recall the guys in the agricultural dept that I worked with a bit in awe of the heat in the PNW.

        1. I suspect so also. Scott Sistek mentions it in the tweet I shared above. It was above 100 in some surrounding areas.

          1. I use this site extensively: http://xmacis.rcc-acis.org/

            To find all-time records, under Single Station, choose “Extremes”, change the length of period to 1 day, then under station selection, chose the nearest NWS office, then you’ll get a list of every station available, usually all the climate sites and the COOP locations for each office.

            It’s easy to get lost in this site for hours looking up data for all sorts of places.

            1. Oh yay. I guarantee I will enjoy. I saved with your instructions which I will need as a reminder each time Thank you

  13. Captain, thank you so much for your post. Loved reading it (twice).

    Really enjoy learning other languages and cultures, and ways of expressing things.

  14. Biggest sports news in the world right now has nothing to do with the Celtics, Patriots, Red Sox, or Bruins. It’s that Germany is being knocked out – as it currently stands – by Hungary. And Germany is playing at home. That, my friends, is a shocker. Germany doesn’t lose at home, let alone to an inferior team.

    1. I’m referring to the European soccer championship (Euro 2020; postponed to 2021 because of Covid).

      1. Spoke too soon. Germany just scored. At this juncture Germany will go through and Hungary is out. Still another 8 minutes to go, including injury time.

        1. Could set up the ultimate game: England against Germany in the next round, at Wembley (London). That’s a Must C match.

  17. this weekend and next week could break records from record heat in the pacific northwest as well as earliest developing eastern MDR system. I am not looking forward to August and September if the MDR is already this active, Heck the tropical wave that the NHC has a 10% has a better lower level closed circulation than Claudette. Luckily the shear and tutt are going to keep it from developing to much after tonight. :/

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