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


weatherwiz
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That was a proper severe storm, first one we've had in a long time in New Haven. The restaurant across the street from me had their sign knocked down and their front door was sucked wide open and then slammed shut so fast I bet the glass shattered. Interestingly, most of the intense winds seemed to me to be either going directly into the storm or out of the SW perpendicular to it's movement. Usually here the worst winds are always pure outflow away from the gust front, but seemingly not this time. Nice little bit of excitement for the 4th.

 

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14 hours ago, dendrite said:

AWOS is pretty bad…especially when Tds start getting up near 70°. Then it seems like they start going up 2° for every 1° reality as they get oversaturated. It gets easy to pick out the ASOS and AWOS stations in IA when they get one of their big summer corn field dewpoint pooling events. ASOS ends up 25-27C and then AWOS is in that 31-32C area. It’s funny seeing 92/89 obs in the afternoon. 

I remember that JFK day and that it was a high dew day overall. Lots of 77-79 readings and spotty 80+ in the late afternoon down the coast of NJ/DE. JFK was in line with 77-78 most of the day and then had a couple of hours get into the low 80s…82 and 84 on the hourlies IIRC. The temp went down briefly before a slight rebound before evening. There were some TCu around too with the breezy S flow off the water. Maybe a little evap cooling putting a little extra moisture in the air? Not sure. But I’ve seen spikes like that from manned stations pre-ASOS days too with temp recovery after showers/storms. 

Yes, I've notice that as well.  The higher the DPs, the more error occurs.

I looked at the the JFK obs string at that time for the 84 DP.  Nothing stood out for any change for wind speed/dir or change in pres.  No storms in the vicinity.  Now if this was Hatteras and S, I can see DP spike up like this since the SSTs are so high, but not here.

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14 minutes ago, vortex95 said:

Yes, I've notice that as well.  The higher the DPs, the more error occurs.

I looked at the the JFK obs string at that time for the 84 DP.  Nothing stood out for any change for wind speed/dir or change in pres.  No storms in the vicinity.  Now if this was Hatteras and S, I can see DP spike up like this since the SSTs are so high, but not here.

I hear ya. But at least it was an already highly anomalous soupy airmass. There were some coastal 80s along the seaboard. Not saying that explains it or that JFK was correct, but at least we’re not talking low 80s vs 65-70 dews.

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