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Severe Wx & Flood Threat Through Tuesday


weatherwiz

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Amazing photos!!

Wiz, the 23z HRRR looked promising, but now the 00z and 01z runs are similar to the 18/00z NAM: A broken line of showers/storms starts to develop east of the CT River tomorrow, but doesn't amount to much. Realistically, that's probably what is most likely to happen, with maybe a stray severe cell or two in eastern New England. It will largely be a nowcasting situation, so we'll see.

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Amazing photos!!

Wiz, the 23z HRRR looked promising, but now the 00z and 01z runs are similar to the 18/00z NAM: A broken line of showers/storms starts to develop east of the CT River tomorrow, but doesn't amount to much. Realistically, that's probably what is most likely to happen, with maybe a stray severe cell or two in eastern New England. It will largely be a nowcasting situation, so we'll see.

 

The 0z WRF doesn't really develop much until after 18-19z really but does so virtually right along the CT River.  The HRRR is much earlier but in the general vicinity.  Will be interesting to see how things look around 8-9 AM.  Looking forward to the 12z soundings

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Holy **** at those wind velocities near Utica

It turns out the hail core is as impressive as it looked:

2103 200 SYLVAN BEACH ONEIDA NY 4321 7573 PICTURE POSTED TO JILL REALES FACEBOOK PAGE VIA WKTV-TV. ESTIMATED BY PICTURE TO BE AT LEAST 2 INCHES IN DIAMETER. (BGM)

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BOX pretty amped up

 

 



AS THIS FRONT SLIDES THROUGH THE REGION...BROAD LIFT WILL
COMBINE WITH A SW LOW-MID LVL JET APPROACHING 30-40 KT THIS
AFTERNOON AND INCREASE THE THREAT FOR T-STORM DEVELOPMENT AHEAD
OF THE FRONT. DRY AIR AND COOLING H5 TEMPS FROM THE ASSOCIATED
TROF IS EXPECTED STEEPEN LAPSE RATES TO 6.5-7.0 C/KM BY THE
AFTERNOON HOURS WHILE THE JET WILL PROVIDE 0-3 AND 0-6 KM SHEAR
VALUES OF 30 TO NEAR 40 KT RESPECTIVELY. WITH A FAIR AMOUNT OF
EARLY DAY SUNSHINE OUTSIDE OF THE MID AND HIGH CLOUDS AND SOME LOW
LVL FOG/STRATUS...ML CAPE VALUES ARE EXPECTED TO APPROACH 1500
J/KG BY MID DAY. THEREFORE...ALL THE PIECES ARE IN PLACE FOR A
SOME STRONG TO SEVERE STORMS AHEAD OF THE FRONT...ESPECIALLY FROM
THE CT VALLEY E. WILL JUST NEED TO MONITOR THE BREAK UP OF
FOG/STRATUS AS THIS MAY INHIBIT THE DESTABILIZATION SOMEWHAT.
GIVEN THE THREAT...AND RECENT TREND IN GUIDANCE...WILL
CONTINUE AND EVEN EXPAND THE LIKELY P
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Looks like eastern areas still have potential. Front is just on the western NE doorstep, but SE CT into RI, E MA and ME still look pretty good. RAP wants to bring in 40kt bulk shear by midday and even though the winds near the surface are mainly SW (not as much veering as some earlier forecast), there should be a fair amount of instability. Limiting factors are timing, cloud-cover and lower dews. I'd venture a guess that we could see a few strong, to locally severe storms, but nothing widespread.

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In-house RPM is bullish on loud thunder and heavy rain late morning and early PM, best chance central and eastern CT.

 

 

Everything definitely favors central/eastern CT into RI and E MA today.  The question just is how strong/severe the storms an become.  If we are able to get rid of clouds/fog early enough, given how lapse rates are steepening with high dews and warm low-level airmass, instability values could soar quite quickly and could be underdone by the models which is what we really have to watch for.  

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The HRRR did a fantastic job with the overnight convection. As soon as it hit CT it just dried up.

It also did an outstanding job yesterday morning of nailing down that squall line to develop between SYR and ALB. Too bad it's not showing anything too crazy today, but still indicates an eastern SNE risk.
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Everything definitely favors central/eastern CT into RI and E MA today.  The question just is how strong/severe the storms an become.  If we are able to get rid of clouds/fog early enough, given how lapse rates are steepening with high dews and warm low-level airmass, instability values could soar quite quickly and could be underdone by the models which is what we really have to watch for.  

It's totally clear in most of interior CT. That's not the issue..It's the timing..It's about 3-4 hours too early coming thru

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It also did an outstanding job yesterday morning of nailing down that squall line to develop between SYR and ALB. Too bad it's not showing anything too crazy today, but still indicates an eastern SNE risk.

yeah both the HRRR and WRF pretty much have development occurring right around Hartford and then sliding east.  I think we'll see some isolated severe reports cross NE CT and northern RI and into interior SE MA

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It's totally clear in most of interior CT. That's not the issue..It's the timing..It's about 3-4 hours too early coming thru

 

Socked in with low clouds/fog here but you would think that would burn off. Timing is definitely the main issue, however, if this burns off more quickly the atmosphere is primed for temperatures to rise very quickly and with high dews/steep lapse rates instability could build rapidly...right now models only have around 1000-1500 J/KG of MLcape developing but those values really could exceed 2000 J/KG with stronger heating earlier on which would be a major help

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Socked in with low clouds/fog here but you would think that would burn off. Timing is definitely the main issue, however, if this burns off more quickly the atmosphere is primed for temperatures to rise very quickly and with high dews/steep lapse rates instability could build rapidly...right now models only have around 1000-1500 J/KG of MLcape developing but those values really could exceed 2000 J/KG with stronger heating earlier on which would be a major help

Clear as can be here..I can see for miles and miles

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