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March 5th Snow Threat


WxUSAF

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It's possible the GFS is too cold...it is super cold...Have people noticed a cold bias with the new GFS?

 

Not sure.  Thought I heard in here at some point that it has some issue with too much radiative cooling (with snow cover), at least beyond the short range.  I recall some ridiculous minimum temperatures it was putting out last month for DCA (like well below zero).

 

As for mid-levels, or if it's got a significant bias in the shorter range (<~48h), I don't know offhand.

 

That 25 degree 2-m temperature you mention above at 09Z is remarkable.  Don't think it was that cold before at that time.

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6-8" everywhere. Another great run

we have gotten alot of snow the past 2 years. 6-8 is starting to get boring. We really need a HECS at this point. I remember we had a stretch where it was HECS or 1-3 and you couldnt buy a 4-8...but now its all about the 3-6, 4-8....double figures or bust

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we have gotten alot of snow the past 2 years. 6-8 is starting to get boring. We really need a HECS at this point. I remember we had a stretch where it was HECS or 1-3 and you couldnt buy a 4-8...but now its all about the 3-6, 4-8....double figures or bust

Agree. If next winter is a blowtorch but delivers one 24" storm I'll rank it above this one.

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DCA at 9z...snow

 

mb m C C % C C deg knt K K K K g/kg
-------------------------------------------------------------------------------
SFC 1015 56 -2.0 -2.6 95 0.6 -2.2 354 14 270.1 270.6 270.2 278.4 3.11
1 1000 172 -3.0 -3.5 96 0.6 -3.2 354 21 270.2 270.7 269.9 278.1 2.94
2 950 576 -6.1 -6.1 100 0.0 -6.1 351 27 271.0 271.4 269.8 277.9 2.54
3 900 998 -6.2 -6.3 99 0.2 -6.2 322 31 275.1 275.6 272.6 282.4 2.64
4 850 1449 -1.7 -1.9 99 0.2 -1.8 281 27 284.4 285.0 279.3 295.5 3.91
5 800 1934 0.2 0.0 99 0.2 0.1 248 31 291.3 292.2 283.5 305.2 4.79
6 750 2452 0.2 0.0 99 0.2 0.1 243 41 296.7 297.7 285.9 311.8 5.11
7 700 3005 -0.9 -1.1 99 0.2 -1.0 240 51 301.5 302.4 287.6 316.7 5.05
8 650 3595 -2.7 -2.8 99 0.1 -2.7 239 64 305.9 306.8 288.9 320.6 4.80

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we have gotten alot of snow the past 2 years. 6-8 is starting to get boring. We really need a HECS at this point. I remember we had a stretch where it was HECS or 1-3 and you couldnt buy a 4-8...but now its all about the 3-6, 4-8....double figures or bust

We are not Anchorage, AK.

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The raw 2mt output from the GFS was definitely too cold with the cold shots, at least. Maybe it's been different during an event?

 

Yes, during precip events. All the models have too been too cold at range with the cold shots it seems.

 

It's really strange with this event that the nam is the warm outlier and the gfs the cold one. 

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we have gotten alot of snow the past 2 years. 6-8 is starting to get boring. We really need a HECS at this point. I remember we had a stretch where it was HECS or 1-3 and you couldnt buy a 4-8...but now its all about the 3-6, 4-8....double figures or bust

 

What.  Ever.  Would love a HECS if one occurs, but I have no problem with a few 4-8" or 6-10" events in a season.

 

Four weeks ago there were many in here wanting to put a bullet between the eyes of this winter and put it out of our misery.  Now look.

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Yeah, but only post-truncation (180 hours). Daytime highs have also been running cold.

 

Agree with this...  Particularly in the LR - even around 100hrs - it's been showing some much colder temps than verified.  Before the 1/29 'screwstorm' it showed negative temps region-wide, then obviously moderated that when the storm went north...  But in the short term there have been a couple of times (this Sunday, e.g.) when the 2m temps on the GFS in the very short term were warmer than reality verified.

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umm... I was just looking at txt output so maybe its wrong but where is the heavy qpf?  I only see a few periods of light qpf at DMW, westminster, totalling about .4 snow. 

you get about .60 of snow since yours starts earlier(1am) but its pretty light. The run sucks for you. Its like .20,.22,20. Shoot you now?

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It's noticeably drier out here than 12z

the people worried about the NAM are nuts, the cold is pressing and the wave is not trending stronger on any guidance.  If anything this reminds me of the march system last year, I think anyone north of Baltimore has way more to fear from a south trend then anything else. 

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you get about .60 of snow since yours starts earlier(1am) but its pretty light. The run sucks for you. Its like .20,.22,20. Shoot you now?

ehh.. 6 inches isnt bad, but of course a let down when previous runs were 10+ and much better rates.  Its a bigger deal north of us, its a suicide run for north of Philly.

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ehh.. 6 inches isnt bad, but of course a let down when previous runs were 10+ and much better rates.  Its a bigger deal north of us, its a suicide run for north of Philly.

next year...Its Hecs hunting or bust. 

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