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11/21-11/22 Cold/snow shower obs


ORH_wxman

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Record cold in store for Thanksgiving...some places may set their all time November record low max...before that though, we have the arctic front that may produce some snow squalls...esp in NNE, but even SNE could get a few.

 

Post 'em here.

 

 

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Both MAV and MET have a high of 17F for ORH on Tday.

 

This would not only crush the record low max for the date, but it would set a new all time record low max for the month of November. The current record is 20F on 11/30/58. To beat that would be impressive enough....but to beat it 8 days earlier would be even more impressive.

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3 minutes ago, ORH_wxman said:

Both MAV and MET have a high of 17F for ORH on Tday.

 

This would not only crush the record low max for the date, but it would set a new all time record low max for the month of November. The current record is 20F on 11/30/58. To beat that would be impressive enough....but to beat it 8 days earlier would be even more impressive.

Gotta watch how quickly we can cool by 5Z too.

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Just now, dendrite said:

Gotta watch how quickly we can cool by 5Z too.

MAV 14F by 06z and MET 16F and Euro 2m is 15F....I'm pretty confident it will be below 20F at least by 05z.

But yeah, if there's a slight lag, then we could get screwed.

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Just now, ORH_wxman said:

MAV 14F by 06z and MET 16F and Euro 2m is 15F....I'm pretty confident it will be below 20F at least by 05z.

But yeah, if there's a slight lag, then we could get screwed.

Yeah I saw that, but it seems like whenever I'm eyeballing this stuff we lag a few degrees behind MOS and 2m. This is an impressive front so maybe it'll be the real deal and maybe even overperform.

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1 minute ago, dendrite said:

Yeah I saw that, but it seems like whenever I'm eyeballing this stuff we lag a few degrees behind MOS and 2m. This is an impressive front so maybe it'll be the real deal and maybe even overperform.

The delivery vector is pretty ideal from Quebec to the N of NY State as the source region, so hopefully it comes in strong. We typically underperform when the component is more westerly.

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5 minutes ago, dendrite said:

How do you verify these?

Kind of tough...here's what I found. Some of this is hard to verify.

Criteria for the National Weather Service to issue a Snow squall warning include:

  • Visibility of less that one quarter of a mile
  • Sub-freezing temperatures on the ground
  • Expected to last in one area less than 60 minutes
  • Cause dangerous and life-threatening conditions[4]
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8 minutes ago, ORH_wxman said:

Kind of tough...here's what I found. Some of this is hard to verify.

Criteria for the National Weather Service to issue a Snow squall warning include:

  • Visibility of less that one quarter of a mile
  • Sub-freezing temperatures on the ground
  • Expected to last in one area less than 60 minutes
  • Cause dangerous and life-threatening conditions[4]

Nice thread about today.

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13 minutes ago, ORH_wxman said:

Kind of tough...here's what I found. Some of this is hard to verify.

Criteria for the National Weather Service to issue a Snow squall warning include:

  • Visibility of less that one quarter of a mile
  • Sub-freezing temperatures on the ground
  • Expected to last in one area less than 60 minutes
  • Cause dangerous and life-threatening conditions[4]

I mean you can assess damage from a severe thunderstorm, but visibility readings are few and far between. I suppose the RWIS sites will come in handy to supplement the METARs.

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1 hour ago, dryslot said:

I think there will be many low max records set on TD.

Maybe for places with 7A obs time, or in VT where the CAA begins earlier, though I'm rooting for an early arrival.  I think this one will be like last Wednesday - cheap 33 the evening before then an afternoon max of 17.  For this one, cut 5° from both readings.  I see a better chance of beating my coldest November morning, currently -4 in 2014.  Of course, if the wind stays up past midnight, like it did last week to keep temps in the positive, that opportunity is also lost. 

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