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Weekend "Storm" Discussion Part III, 2/18-2/19


stormtracker

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And hr 27 saves the day. Thanks NAM.

if the nam is right, richmond itself has boundary layer issues ... no colder than 35 during heavy precip.

TEMPS

2 M (F) 51 44 37 41 36 35

850 MB © 4 2 0 -3 -5 -7

700 MB © -6 -6 -5 -4 -5 -8

500 MB © -18 -17 -16 -17 -20 -21

1000-500 THCK 548 545 545 543 540 536

MOISTURE

2 M DEW POINT (F) 36 32 27 30 32 30

850 MB DP©/RH -6/48 -6/56 -7/60 -4/89 -6/95 -9/85

700 MB DP©/RH -10/71 -12/65 -7/86 -4/99 -5/99 -8/96

500 MB DP©/RH -32/29 -20/80 -20/72 -30/31 -22/83 -23/84

PRCPABLE WTR (IN) 0.50 0.55 0.60 0.64 0.69 0.56

CONV PRECIP (IN) 0.00 0.00 0.00 0.00 0.00

TOTAL PRECIP (IN) 0.00 0.00 0.01 0.18 0.37

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The NAM should be getting in range sometime tomorrow...I expect it to have a good handle on the storm by the 0z run tomorrow night or the 6z run on Monday

I have actually seen it where it was wrong until the bitter end (i.e., even as the storm was ongoing it just had no clue what was going on). Groundshog day Feb 1 2011.

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Look at your sim radar at 27. Your precip is about gone, and your ground temps are still above freezing.

if the nam is right, richmond itself has boundary layer issues ... no colder than 35 during heavy precip.

TEMPS

2 M (F) 51 44 37 41 36 35

850 MB © 4 2 0 -3 -5 -7

700 MB © -6 -6 -5 -4 -5 -8

500 MB © -18 -17 -16 -17 -20 -21

1000-500 THCK 548 545 545 543 540 536

MOISTURE

2 M DEW POINT (F) 36 32 27 30 32 30

850 MB DP©/RH -6/48 -6/56 -7/60 -4/89 -6/95 -9/85

700 MB DP©/RH -10/71 -12/65 -7/86 -4/99 -5/99 -8/96

500 MB DP©/RH -32/29 -20/80 -20/72 -30/31 -22/83 -23/84

PRCPABLE WTR (IN) 0.50 0.55 0.60 0.64 0.69 0.56

CONV PRECIP (IN) 0.00 0.00 0.00 0.00 0.00

TOTAL PRECIP (IN) 0.00 0.00 0.01 0.18 0.37

This is true. I love me some 850 maps but I knew from the beginning that BL issues would be present.

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I have actually seen it where it was wrong until the bitter end (i.e., even as the storm was ongoing it just had no clue what was going on). Groundshog day Feb 1 2011.

One of the models was completely blowing the 1/26 storm last year up north as it was happening, it may have been the NAM as well.

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I dont take it seriously in the winter and never have......I am told it is a good model for severe, squall lines, etc....Maybe we should just table it in the winter....I'm not sure what value it has?....weather is complex...If it is only capable of handling easy systems, we probably shouldnt pay it much attention....no doubt this was a tough one for all the models though

It has winter utility, believe it or not. It has quite a bit of skill (for whatever reason) in situations where systems go negative tilt or feature very deep upper level PV's undergoing rapid cyclogenesis. Slow moving and deep systems are undoubtedly its forte. NAM also likes trop folds, and it has shown skill in rapidly bombing Miller B type Nor'easters with trop folds. What is worth mentioning here, however, is we are dealing with a "new" NAM since it was completely overhauled this fall.

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