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Feb 13: The little storm that could (for some)


Ian

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Everyone should brace themselves for this to be a painful storm. This seems like the type where DC gets an inch, Baltimore gets 2-3, and some dude in north central MD gets 6-8. And then he mentions it fifty times in the obs thread.

 

psu and parrs ridge area like mt airy / westminster by far has the best shot here. 

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I think a few miles could mean something. Baltimore really could get 2 while DC gets 0. I like that the column is cool enough below 900, and if we snowed hard enough, we could make it down as some huge wet flakes that cover everything.

It definitely could end up being a neighboorhood to neighborhood type of thing. Even areas that are mostly rain, if it switches over for at least a couple hours they will accumulate easily. Most models are now seemingly increasing qpf, so there could be some very good rates in the order of an inch an hour plus for a short time, so like you said everything would cover up quickly even with surface temps around 34. Alot of precip in a relatively short period would support good rates. I know it's said all the time but in such a marginal event any elevation is key even if it's just a couple hundred feet.

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yessir, which is why I mentioned the GFS/NAM combo Bob

I think you could tell by the tone of my posts that I am not that fond of the Euro this year

seems like it used to be better

 

After watching nothing short of a bazillion runs over the years, each global and sr model is quite useful if you know what to look for. Euro is gonna always be the go to with the big coastals and miller b's. That's undeniable. And it's also really easy to remember. But the gfs does quite well with weaker, faster moving, and ns systems. Not every time of course. Definitely this year though. I doubted the euro much more than most with this system. I'm glad I'm right because it tells me I've learned something a little complicated while punishing myself with this dreadful hobby. 

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Everyone should brace themselves for this to be a painful storm. This seems like the type where DC gets an inch, Baltimore gets 2-3, and some dude in north central MD gets 6-8. And then he mentions it fifty times in the obs thread.

It seemed like these sharp gradient storms were more common in the 80s and 90s. I recall an instance living in Baltimore City where we had all rain and Hereford zone had double digit accumulations with schools closed. That was painful.
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After watching nothing short of a bazillion runs over the years, each global and sr model is quite useful if you know what to look for. Euro is gonna always be the go to with the big coastals and miller b's. That's undeniable. And it's also really easy to remember. But the gfs does quite well with weaker, faster moving, and ns systems. Not every time of course. Definitely this year though. I doubted the euro much more than most with this system. I'm glad I'm right because it tells me I've learned something a little complicated while punishing myself with this dreadful hobby. 

 

Storm is still like 48 hours away. :P

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how about the cookie sized 850 zero spot over winston salem. This is a fair example as to why the nam can't be trusted. 

 

 

I think that's common-- marginal dry air and precip enters. Doesn't mean it's snowing on the ground, but Boon 70 miles west might be cranking.

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It seemed like these sharp gradient storms were more common in the 80s and 90s. I recall an instance living in Baltimore City where we had all rain and Hereford zone had double digit accumulations with schools closed. That was painful.

It did seem to be more common. I also can remember many instances when I lived in Reisterstown where Westminster would get 4 plus and we got zilch and we are talking less than ten miles away. They were the hardest to take.

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18Z sounding for DCA...over 6C at the surface.

 

Date: 42 hour Eta valid 18Z WED 13 FEB 13Station: KDCALatitude:   38.85Longitude: -77.03-------------------------------------------------------------------------------LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W     mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg-------------------------------------------------------------------------------SFC 1004    57   6.4  -0.1  63  6.5   3.5  68   6 279.2 279.9 276.5 289.7  3.78  1 1000    86   6.0   0.2  66  5.8   3.4  75   5 279.1 279.8 276.6 289.9  3.87  2  950   503   2.6  -2.4  69  5.0   0.5 128   9 279.9 280.4 276.3 289.3  3.37  3  900   937  -0.1  -5.8  65  5.7  -2.2 159  11 281.4 281.9 276.3 289.2  2.75  4  850  1393  -3.7  -4.9  91  1.2  -4.1 187  11 282.3 282.9 277.3 291.2  3.13  5  800  1870  -4.9  -5.6  95  0.7  -5.2 199   9 285.9 286.5 279.1 295.0  3.15  6  750  2376  -7.0  -7.3  98  0.3  -7.1 188  13 289.0 289.5 280.3 297.6  2.94  7  700  2917  -5.2  -5.6  97  0.4  -5.4 214  37 296.7 297.4 284.4 307.5  3.60  8  650  3497  -5.3  -5.5  98  0.2  -5.4 230  58 303.0 303.7 287.1 314.9  3.89  9  600  4122  -8.9  -9.5  96  0.5  -9.1 237  66 305.8 306.4 287.2 315.5  3.11 10  550  4790 -13.4 -18.2  67  4.8 -14.8 238  66 308.2 308.5 286.6 313.6  1.66 11  500  5508 -18.4 -31.8  30 13.4 -20.8 245  68 310.6 310.7 286.2 312.4  0.53 12  450  6285 -24.6 -36.4  33 11.7 -26.2 249  68 312.3 312.3 286.6 313.6  0.38 13  400  7128 -32.3 -40.7  43  8.4 -33.1 247  68 313.1 313.1 286.8 314.1  0.27 14  350  8054 -40.0 -49.7  35  9.6 -40.6 246  72 314.7 314.8 287.1 315.2  0.12 15  300  9093 -44.8 -66.8   7 22.1 -45.3 247 103 322.3 322.3 289.5 322.3  0.02 16  250 10295 -51.5 -71.6   7 20.1 -51.8 248 114 329.4 329.4 291.6 329.5  0.01 17  200 11728 -54.1 -70.7  11 16.6 -54.4 251 125 347.1 347.1 296.0 347.2  0.01 18  150 13571 -55.7 -76.9   5 21.2 -56.0 252 119 374.1 374.1 301.3 374.2  0.01 19  100 16105 -62.7 -85.2   3 22.5 -62.9 248  93 406.6 406.6 306.1 406.6  0.00
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