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Ju-ply 2026 Obs and Disco - Kicking it off with heat, humidity, and ... severe?


weatherwiz
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17 minutes ago, Damage In Tolland said:

That would make me throw up in my mouth . I’m on 3rd good one . We Treehouse currently.

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Dis the OG. How dare you. About the only TH I’m consuming right now is their YT page and Nate’s’ beer reviews of classics. I don’t drink much anymore. 

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13 hours ago, tamarack said:

Possibly a TD error - once dews get into mid-70s and above the HI goes nuts.  Some years back I found a couple sites at Iranian oil-handling islands on the Persian Gulf that were reporting 98-100F with TD 88-90 and HI well into the 130s.  Those readings were consistent over several days.  Maybe each site had data issues, or maybe that's the dewpoint capitol of the world. 
(Several times the reports included wind 25-30 mph with condition listed as "sand".  I can't think of a worse wx experience, outside of strong tor/canes.)

Follow-up to CAR minima:  They were reporting 73 at midnight, warmer at 10 and 11 PM, down to 71 by 1 AM.  Looks like their warmest minimum breaks the record, but by 2° rather than 3°.

Thanks for the overview summary.

Dew points often have even bigger issues than temps are ASOS/AWOS sites.  I years ago looking at the OK mesonet (first installed in the mid 90s).  Mesonet sites are typically sited properly and actually geared for climate data (ASOS/AWOS are geared more toward aviation).

So many days when it was hot and high dew points, the ASOS/AWOS would almost universally had higher dew points than the mesonet.  Well, they both can't be right!  I'd take mesonet data over ASOS/AWOS the vast majority of the time.

I recall about 10 years ago during a heatwave, JFK's ASOS DP got wacky and shot to 84 one day.  Not sure what happened there.

Also, there are so many types of wx stations our there (govt and private), all for different uses.  Some are sited to monitor the local environment, like a marsh or a swamp.  So what do you think the dew point will do when the equipment is next to or in a marsh/swamp?  :D  It's similar to all the marine sites out there.  The anemometers are not all at the standard 10m elevation, so you have to account for this when talking records and the like.  AWOS sites on oil platform heliports in the Gulf are often 100 ft or more ASL.

Oh, and how about the AWOS at the smaller airports in the Corn Belt?  IA has it a lot where at a certain times in the summer, the DPs get into the 80s.  That is a local effect since corn has high evapotranspiration.  However, at times this can impact convective initiation and intensity in the state and adjacent areas!  A few papers has done studies on this.

For the Persian Gulf, dew points in the 90s are a real thing in some areas.  Qeshm Island (METAR code: OIKQ) in Iran is one such area.  Every August in the mornings, they get ridiculous DPs in the 90s w/ heat indices as high as 180!
I've checked the METARs and they are legit, given the location and how diurnally  the dew points drops in the aftn as the BL mixed out.

And the island's population is 149k.  Quite impressive that humans can live in such an environment w/ little issues!
 

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9 hours ago, Torch Tiger said:

wow just noticed that.  Cape Cod Bay buoy up to 77.2 and ACK 75.  impressive though it's shallow

I think a big missed effect of these much higher dews and in turn much higher night time temps is to increase SST’s a lot faster than one would expect…

We get it though—without much thought— but only when this is observed in our back yard pool temp…

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10 hours ago, CT Valley Snowman said:

Probably a 98-99 BDL today.  I'm up north in the car heading into Gilead in western Maine on Rt 2 and temps are upper 80's. 

  

So BDL unperformed overall.  GFS MOS had 103 Thu/Fri 18z 7/1 and 00z 7/2 runs and still just after was showing 101/102.  Yet "only" 100 and 98 the 2 days.  Wasn't due to convection or clouds.  Any long-term MOS bias for BDL?

I think the only reason why BOS hit 100 Fri was due to NW subsidence and the DP dropping to 57.

What the MSM and others don't tell you or report is that once the dew point drops to 57 or lower, that heat index is actually *lower* than the air temp.  BOS 100/57 at 3pm gave a heat index of 99.

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9 hours ago, dendrite said:

Aug 1944

What a stretch

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One thing that is apparent, when you look at deep at historical data and wx events of the past, you find many that match or exceed anything today or in recent years.  But history be damned in favor of the narrative.

A friend of mine who gets the small wx calendars that you remove a page a day, he notes obvious bias as to historical wx events.  He has told me it is like nothing ever happened/existed before 2000.  All it talks about is extremes in recent years.  So when I say "narrative,"  I am not pulling things out of thin air.  You can see clear bias and skewed facts all over the place w/ disingenuous motives.

All I am saying is that *all* data/info be reported on or put forth, esp. in the sciences, since it is objective and based on fact.  Then individuals can at least make educated and reasonable points/views/opinions.

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