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June 2024


Stormlover74
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1 minute ago, winterwx21 said:

It does feel strange to have such a big severe weather threat on day that's completely overcast. Hopefully it won't hurt chances for our area. 

Lots of big storms north of us. But they are further away from the south jersey convection. HRRR says our area waits til the 2nd line around 6-7pm

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The NY area really had something like 200 or 300 storm reports a few days ago. Now, it looks like several more severe storms will be in the general area. As per last night's models, I thought this might be a slight risk, as advertised yesterday, by the SPC. Now, the enhanced risk seems alright.

240626_rptsA1.png

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Just now, Chinook said:

The NY area really had something like 200 or 300 storm reports a few days ago. Now, it looks like several more severe storms will be in the general area. As per last night's models, I thought this might be a slight risk, as advertised yesterday, by the SPC. Now, the enhanced risk seems alright.

240626_rptsA1.png

This looks nothing like what we are going to get today, hrrrrrrr has very little

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It's interesting watching again the storms go about 20-25 miles off to my north along the Sussex/Orange County border.  It's not that we don't get anything (think Thursday), but this seems to be the case 7 or 8 times out of 10.  You can almost pick Montague/Port Jervis/Warwick, as the start of the line and from there on north and east, and you'd be right 80% of the time.  

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Areas affected...southern New England, southern New York State, eastern Pennsylvania, northern New Jersey

Concerning...Heavy rainfall...Flash flooding possible

Valid 301744Z - 302344Z

Summary...Bands of scattered thunderstorm activity were moving quickly to the east, but also merging/training locally to produce spots of 1+ inch/hr rain rates at times. These rates could cause flash flood potential to increase through the early evening.

Discussion...Storms have deepened and expanded in coverage within a strongly unstable airmass across the discussion area over the past hour. The storms are aligned along and just ahead of a surface cold front across central PA/southern New York and were embedded in deep westerly flow, promoting 30-40 kt storm motions. Of particular concern, however, is the alignment of convection across Connecticut and southern New York favoring training, which has boosted rain rates into the 1-1.5 inch/hr range, threatening local FFG thresholds.

Models/observations are in general agreement that storms will continue to train/expand eastward while propagating southward/eastward toward more populated locales (including New York/northern New Jersey, Providence RI, and Boston). Not only are FFGs locally lower in some of these areas, but urban/hydrophobic surface may promote a local flash flood risk especially where rain rates exceed 1 inch/hr. Flash flooding is possible given the aforementioned scenario.
 

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