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february 25 rain storm


earthlight

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OKX Update

Near term /through tonight/... at 12z a 993 hpa surface low was near kagc-klbe...with 3 hour pressure falls approaching 7 mb to its northeast. This would take the low on a track farther northwest than any model solution...with the RUC the closest to this idea. The models are likely wrong with their surface low track due to them not having enough upstream ridging (based on comparing their 500 hpa height forecast over New York/PA/NJ to RUC analysis). If this trend holds...then temperatures and winds are likely under forecast across the area...especially across the northern interior. Will continue to monitor this...especially with implications to wind headlines...and convective potential - could be more widespread - stronger than currently forecast if trends hold. In the short term...have updated hourly wind/temperature/dewpoint grids to better reflect current conditions - winds were increased a couple of hours too soon...and NE flow across the far western sound has resulted in temperatures at LGA being held in the upper 30s...while areas near the S shore of Long Island have warmed a tad faster than expected. Otherwise current forecast on track.

From my perspective, this is great to hear. I did see this update a bit earlier and was glad to see it contrast with the most recent NAM/GFS runs that have the low further SE and weaker.

Areas in the warm sector will get the most impressive weather today. Temps will spike, winds will shift to the S-SW and become gusty ahead of the front, and convection will be possible in these areas. The post-frontal W-NW winds, which are the focus of the wind portion of the event, have more upward potential in the areas that end up getting warm sectored first, as well. The front will still be awesome in areas that don't get into the warm sector, but best for those who get it.

And my rainfall total here is up to 0.92" for the day. 0.05" also fell last night before midnight. There's still significant snowpack here, probably several inches in my yard, which will contribute to flooding.

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From my perspective, this is great to hear. I did see this update a bit earlier and was glad to see it contrast with the most recent NAM/GFS runs that have the low further SE and weaker.

Areas in the warm sector will get the most impressive weather today. Temps will spike, winds will shift to the S-SW and become gusty ahead of the front, and convection will be possible in these areas. The post-frontal W-NW winds, which are the focus of the wind portion of the event, have more upward potential in the areas that end up getting warm sectored first, as well. The front will still be awesome in areas that don't get into the warm sector, but best for those who get it.

And my rainfall total here is up to 0.92" for the day. 0.05" also fell last night before midnight. There's still significant snowpack here, at least several inches in my yard, which will contribute to flooding.

The winds should really start picking up over the next few hours with ACY gusting to 40 mph now.

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Disagree with OKX on this. Best pressure falls are ENE of the low. Low should track near the warm front across extreme NE NJ and through LI Sound into eastern CT.

post-88-0-39817400-1298641266.gif

OKX Update

Near term /through tonight/... at 12z a 993 hpa surface low was near kagc-klbe...with 3 hour pressure falls approaching 7 mb to its northeast. This would take the low on a track farther northwest than any model solution...with the RUC the closest to this idea. The models are likely wrong with their surface low track due to them not having enough upstream ridging (based on comparing their 500 hpa height forecast over New York/PA/NJ to RUC analysis). If this trend holds...then temperatures and winds are likely under forecast across the area...especially across the northern interior. Will continue to monitor this...especially with implications to wind headlines...and convective potential - could be more widespread - stronger than currently forecast if trends hold. In the short term...have updated hourly wind/temperature/dewpoint grids to better reflect current conditions - winds were increased a couple of hours too soon...and NE flow across the far western sound has resulted in temperatures at LGA being held in the upper 30s...while areas near the S shore of Long Island have warmed a tad faster than expected. Otherwise current forecast on track.

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The winds should really start picking up over the next few hours with ACY gusting to 40 mph now.

On cue; looks like good gusts getting into JFK now. The warm front surged northward over the past hour and looks to be through the city; Newark as well. Trenton is also in the warm sector.

Disagree with OKX on this. Best pressure falls are ENE of the low. Low should track near the warm front across extreme NE NJ and through LI Sound into eastern CT.

post-88-0-39817400-1298641266.gif

I guess I'll just have to hope you're wrong. :)

I am encouraged by the how far north the warm sector has edged already. SPC's outlooks also support a possible warm frontal passage further north, based on the scope of their outlooks. These events are always marginal in terms of getting warm sectored or not to the NW of the city. I'm hoping for a 3/8/08 type of evolution, during which my area just barely got into the warm sector to set up a squall line and powerful post-frontal winds (though areas to the N got hit hard, too).

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It looks to me like the surface low will track right over our region in agreement with the previous poster and not well to our northwest based on the latest surface analysis. Steadier precip will cutoff sooner than I expected. Convection is really firing up over the past hour or so over central PA but most of that looks to pass to our northwest. We shall see what transpires down the road. The NWS definitly knows what they are talking about though so perhaps they are seeing something that we are not.

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Not sure what Upton is looking at. Highest pressure falls as of. 15z are actually east of Long Island and towards the offshore waters of Rhode Island. Case in point, DXR has been in the mid-30s all morning.....really should have topped 40 by now if the low was going to track overhead.

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Not even a slight breeze here yet in Ramsey

I don't think it will be anything but calm in this area for the next couple hours or so.The warm front appears to be on a line from roughly Hoboken to Flemington. It actually might not even make it through this area if the low passes overhead. But this doesn't change the fact that things will get wild post-frontal here, starting maybe in the 3-4pm timeframe and peaking around 7pm. The High Wind Warning runs from 3-11pm.

I think the poster above me has the right idea as well - our temps will actually spike after the cold front.

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