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Monday showers/thunder threat


free_man

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Scott, your thinking that this line hits, and then more discrete cells form Behind it?

Well "hit" is subjective. It's possible the line weakens as it moves east, but the airmass is also heating up too. I'd say wait until it gets into VT and then evaluate. Afterwards, more cells will develop over NY state, but I don't think you can say that they will be totally discrete, at this early juncture. Might be very early on and then form into a line, but lets just see how they form...nevermind the type of cells and organization.

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Lining up along and south of the pike, along and ahead MCS in NYS.

...NERN U.S... THE ESEWD PROGRESSION OF MULTIPLE MIDLEVEL IMPULSES WILL COLLECTIVELY LOWER HEIGHTS ACROSS THE REGION THROUGH THE D1 PERIOD...DOWNSTREAM FROM EXPANSIVE CNTRL U.S. ANTICYCLONE. COLD FRONT CURRENTLY FROM THE ST. LAWRENCE VALLEY WWD INTO THE UPPER GREAT LAKES WILL PROGRESS SEWD TO OFF THE NEW ENGLAND AND MID ATLANTIC COASTS BY 19/12Z. PERSISTENT WLY LOW-LEVEL FLOW AHEAD OF FRONT WILL SERVE TO ENHANCE THE FLUX OF AN INCREASINGLY WARM AND HUMID AIR MASS INTO THE AREA FROM THE OH VALLEY. LOOSELY ORGANIZED MCS OVER UPSTATE NY WILL LIKELY CONTINUE SEWD THIS MORNING...THOUGH UNCERTAINTY EXISTS WHETHER THIS COMPLEX WILL INTENSIFY BY LATE MORNING/EARLY AFTERNOON...OR UNDERGO DIURNAL DECAY. IN ADVANCE OF THIS ACTIVITY...DAYTIME HEATING COUPLED WITH LOW-LEVEL MOIST ADVECTION FROM THE W WILL YIELD AFTERNOON MLCAPE APPROACHING 1000-2000 J/KG. AS SUCH...EXPECT THE INTENSIFICATION OF ANY STORMS THAT CAN PERSIST THROUGH THE MORNING...AS WELL AS SUPPORT THE DEVELOPMENT OF ADDITIONAL STORMS ALONG PRE-EXISTING OUTFLOW BOUNDARIES AND COLD FRONT ITSELF. EXIT REGION OF 100+ KT UPPER-LEVEL JET STREAK WILL GRADUALLY DEVELOP SEWD FROM ONTARIO...ENHANCING DEEP-LAYER SHEAR FOR BOWING LINE SEGMENTS AND SUPERCELLS CAPABLE OF MAINLY DAMAGING WINDS AND PERHAPS SOME HAIL.

day1probotlk_1300_wind.gif

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Not so sure why BOX and SPC are so excited about the severe threat. The radar looks horrific.

It almost looks like NNE had a better shot than CNE AND SNE right now.. they look to clear much faster after this initial batch and not be so inundated with clouds/ after that

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Not so sure why BOX and SPC are so excited about the severe threat. The radar looks horrific.

Just not sure I understand the thinking. Both SPC and BOX are assuming storms develop out ahead of this line, but at 45mph or so this is moving through SNE in 2-4 hours, not 3-7PM as has been discussed. And it's showing no signs of weakening.

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Just not sure I understand the thinking. Both SPC and BOX are assuming storms develop out ahead of this line, but at 45mph or so this is moving through SNE in 2-4 hours, not 3-7PM as has been discussed. And it's showing no signs of weakening.

This isn't the line they are forecasting severe for. This was unforecast by models and humans .They are keying on something happening later

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This isn't the line they are forecasting severe for. This was unforecast by models and humans .They are keying on something happening later

Erm, it's been forecasted all morning:

LOOSELY ORGANIZED MCS OVER UPSTATE NY WILL LIKELY CONTINUE SEWD THIS MORNING...THOUGH UNCERTAINTY EXISTS WHETHER THIS COMPLEX WILL INTENSIFY BY LATE MORNING/EARLY AFTERNOON...OR UNDERGO DIURNAL DECAY. IN ADVANCE OF THIS ACTIVITY...DAYTIME HEATING COUPLED WITH LOW-LEVEL MOIST ADVECTION FROM THE W WILL YIELD AFTERNOON MLCAPE APPROACHING 1000-2000 J/KG. AS SUCH...EXPECT THE INTENSIFICATION OF ANY STORMS THAT CAN PERSIST THROUGH THE MORNING...AS WELL AS SUPPORT THE DEVELOPMENT OF ADDITIONAL STORMS ALONG PRE-EXISTING OUTFLOW BOUNDARIES AND COLD FRONT ITSELF.

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Just not sure I understand the thinking. Both SPC and BOX are assuming storms develop out ahead of this line, but at 45mph or so this is moving through SNE in 2-4 hours, not 3-7PM as has been discussed. And it's showing no signs of weakening.

I think it is weakening but not fast enough. Cloud tops are warming quickly and the radar is looking less impressive.

That said a tremendous amount of convective debris along with crummy mid level lapse rates behind it will advect in this afternoon.

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Erm, it's been forecasted all morning:

LOOSELY ORGANIZED MCS OVER UPSTATE NY WILL LIKELY CONTINUE SEWD THIS MORNING...THOUGH UNCERTAINTY EXISTS WHETHER THIS COMPLEX WILL INTENSIFY BY LATE MORNING/EARLY AFTERNOON...OR UNDERGO DIURNAL DECAY. IN ADVANCE OF THIS ACTIVITY...DAYTIME HEATING COUPLED WITH LOW-LEVEL MOIST ADVECTION FROM THE W WILL YIELD AFTERNOON MLCAPE APPROACHING 1000-2000 J/KG. AS SUCH...EXPECT THE INTENSIFICATION OF ANY STORMS THAT CAN PERSIST THROUGH THE MORNING...AS WELL AS SUPPORT THE DEVELOPMENT OF ADDITIONAL STORMS ALONG PRE-EXISTING OUTFLOW BOUNDARIES AND COLD FRONT ITSELF.

No it hasn't.The morning update from SPC is the first place it has been mentioned by anyone

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This isn't the line they are forecasting severe for. This was unforecast by models and humans .They are keying on something happening later

Actually the models did a pretty good job with this. A line like this one was exactly why I wasn't very gung ho yesterday.

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