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Mid week storm talk continued


mitchnick

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That's crazy looking those highs should crush this to the south

If there was a block to keep them in place.. then yes.. but the pv in canada which is holding the highs in pllace is retrograding east.. so we loose them when the real precip starts. Id still say we see maybe an inch or 2 with another few tenths of an inch of ice before rain.

What could happen is the strength of the highs+ the snow pack could lower temps enough that the warmup might be just above freezing so when the storm lifts east of us the northwest winds will quickly get us down below freezing..

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By 72 most of central md and nova (loudon county) are just above frzn.. in total .25-.5 frozen precip across region. Northern md and west are still below freezing however in upper 20s.. with over .25-.5 falling during that time..

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If nam is showing it that cold at 72...ice storm looks likelly because it will trend colder and be slower to move out

We knew with the CAD that is was likely to have a longer period of icing then the GFS and Euro showed but i cannot imagine the NAM is correct and it is this cold.

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We knew with the CAD that is was likely to have a longer period of icing then the GFS and Euro showed but i cannot imagine the NAM is correct and it is this cold.

Nobody ever likes the NAM temps on this forum, and I don't know why... Right now I would be going 50/50 with the NAM/GFS temps for this system.

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Nobody ever likes the NAM temps on this forum, and I don't know why... Right now I would be going 50/50 with the NAM/GFS temps for this system.

I do not have such a great memory on prior seasons verification like others but if memory serves me

is not the NAM usually to cold at the surface?.

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I do not have such a great memory on prior seasons verification like others but if memory serves me

is not the NAM usually to cold at the surface?.

It has to really be viewed on a case-by-case basis. In most mesoscale-sized events, I would take the NAM's numbers over the GFS. Examples would include CAD and also warmer temps just ahead of a cold front that has strong southerly winds in the lower levels.The NAM also seems to do a better job during nights with broken/overcast skies and southerly winds (wamer lows).

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It has to really be viewed on a case-by-case basis. In most mesoscale-sized events, I would take the NAM's numbers over the GFS. Examples would include CAD and also warmer temps just ahead of a cold front that has strong southerly winds in the lower levels.The NAM also seems to do a better job during nights with broken/overcast skies and southerly winds (wamer lows).

Well you know a lot more than me, and if that is correct we could be having the making's of a severe ice storm here if it keeps trending a little colder.

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Well you know a lot more than me, and if that is correct we could be having the making's of a severe ice storm here if it keeps trending a little colder.

For areas around Frederick and Baltimore and north I could see significant icing. DC and south will have a harder time keeping the SFC cold enough for significant accumulations.

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The 18Z nam is quite a bit colder out towards Frederick, md than the previous run and would support freezing rain Wed morning which would be a mess since that when the heavier precipitation will be falling. even rockville looks like they would be below freezing at the surface. Here's the nam sounding for frederick.

post-70-0-15053100-1296423010.png

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For areas around Frederick and Baltimore and north I could see significant icing. DC and south will have a harder time keeping the SFC cold enough for significant accumulations.

Well you know me i am a IMBY type of guy :whistle: , i was talking about my area. I hope you are wrong though i hate ice, my dish usually goes out and obviously the power as well. Then my kids are always home and i cannot even spend so much time on the forum.

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Not sure I believe it

63 02/02 09Z 30 30 102 6 0.07 0.00 545 562 3.5 -16.6 1021 100 FZRN 000OVC373 0.0 1.1

66 02/02 12Z 30 29 87 11 0.19 0.00 547 561 3.5 -14.8 1018 100 FZRN 000OVC432 0.0 0.8

69 02/02 15Z 31 30 91 12 0.24 0.00 549 561 5.6 -15.6 1014 100 FZRN 000OVC411 0.0 0.7

72 02/02 18Z 32 32 15 3 0.22 0.00 548 556 5.5 -14.4 1009 100 FZRN 000OVC117 0.0 0.7

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Not sure I believe it

63 02/02 09Z 30 30 102 6 0.07 0.00 545 562 3.5 -16.6 1021 100 FZRN 000OVC373 0.0 1.1

66 02/02 12Z 30 29 87 11 0.19 0.00 547 561 3.5 -14.8 1018 100 FZRN 000OVC432 0.0 0.8

69 02/02 15Z 31 30 91 12 0.24 0.00 549 561 5.6 -15.6 1014 100 FZRN 000OVC411 0.0 0.7

72 02/02 18Z 32 32 15 3 0.22 0.00 548 556 5.5 -14.4 1009 100 FZRN 000OVC117 0.0 0.7

Out here doesn't get in on the initial batch of precip...fringed

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