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Northeast Severe/Convective/Thunder thread V


Typhoon Tip

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The KFS has an interesting initialization scheme. It takes texts from various forecasters and then spits out a forecast combining the most extreme scenario. Fascinating.

What would you say is its verification score is worse than the cras I imagine.

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SPC gives us a shout-out in the 4-8 day outlook:

...DISCUSSION...

IN MID-UPPER LEVELS...EXPECT BREAKDOWN AND SEWD SHIFT OF ANTICYCLONE

NOW OVER WRN CONUS. THIS...ALONG WITH AREA OF HEIGHT FALLS OVER

E-CENTRAL CANADA AND PORTIONS UPPER GREAT LAKES REGION...WILL LEAD

TO BELT OF FASTER FLOW ALOFT ACROSS NRN PLAINS AND UPPER MS VALLEY

REGION BY DAY-5/16TH-17TH...EXTENDING EWD OVER NY/NEW ENGLAND REGION

THEREAFTER. EXPECT RELATED/MEAN SFC BAROCLINIC ZONE TO BECOME

WELL-ESTABLISHED DAYS 5-6/16TH-18TH FROM NRN PLAINS TO PORTIONS

UPPER GREAT LAKES...SERN CANADA AND NEW ENGLAND...PARALLEL TO FLOW

ALOFT AND ALONG NRN RIM OF RICH LOW-LEVEL MOISTURE. THIS PATTERN

CAN SUPPORT SUBSTANTIAL EWD PROPAGATION OF ONE OR MORE SVR MCS WITH

SWATHS OF DAMAGING WIND...ARISING FROM UPSHEAR NRN PLAINS/UPPER

MIDWEST/GREAT-LAKES TSTM GROWTH. SUCH ACTIVITY MAY OCCUR IN

ASSOCIATION WITH DAY 5-6 SHORTWAVE TROUGH MOVING EWD ACROSS SRN TIER

OF CANADA. ATTM...CONSIDERABLE MODEL DIFFERENCES EXIST REGARDING

KEY SHORTWAVE TIMING/AMPLITUDE DETAILS ALOFT...AND THEIR IMPACT ON

STRENGTH/MOVEMENT OF RELATED FRONTAL-WAVE LOW. THAT IN TURN

STRONGLY INFLUENCES GREATEST POTENTIAL FOR GENERATION AND

MAINTENANCE OF RELATIVELY DENSE TSTM CONCENTRATIONS.

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12z euro slightly better than yesterday for Weds. Better defined s/w, stronger cold front.... meh, I'm grasping at straws here. Chance I'll be taking down the UMass radar after this summer, and would really like another good event.

I don't see you grasping at straws. The timing could get messy, and also height falls / cf lagging could be an issue..looks like as usual, gfs is more aggressive. Pretty good setup even if it's a night time thing.

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Why would it come down?

Given that it's most useful as a tool for severe weather, I think we could all admit that this area is not ideal, despite the coverage gap. Were it used operationally by BOX, (as these radars were used operationally by OUN), that would give some ammo to keep it up, but their bandwidth situation is so bad that it may prevent them from being able to bring in the data. Heck, even ENX flows over NOAAnet :axe:

Nothing is set in stone, but it's pretty tempting to haul it to DFW to augment the network we're building there. One day I certainly would love to see a small network along the river valley, despite the relative lack of severe. For now it's pretty hard to demonstrate value banking on these typically marginal setups to produce something notable.

And on cue, the models took a step in the wrong direction overnight for next week.

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Isolated severe tomorrow? Will depend on degree of instability we can attain and whether we can actually get some of the more impressive mid level winds in here (like the NAM is showing). Looks sort of meh right now but could perk up if certain ingredients fall the right way.

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Isolated severe tomorrow? Will depend on degree of instability we can attain and whether we can actually get some of the more impressive mid level winds in here (like the NAM is showing). Looks sort of meh right now but could perk up if certain ingredients fall the right way.

You think all of CT will see some rain tomorrow of meaning? Not just hit and mis stuff. Getting tired of dragging sprinklers around
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PWATS tomorrow are quite high and I'm not all that sure we will see the instability values the GFS is forecasting. Looking at soundings with the upper levels of the atmosphere being so moist I think clouds will be a big issue tomorrow and that will limit instability. Not to mention mid-level lapse rates blow and there even looks like a weak cap in the mid levels. Shear is pretty meh although the wind profile is pretty decent but it sucks shear is on the weak side.

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I think we'll see some fun heavy rainers today back here... maybe even a pulse severe downburst with these things loaded with water as long as we can organize a couple updrafts. Shear is low... but not 0... so maybe that's enough to tip things IF we realize decent instabilty.

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I think we'll see some fun heavy rainers today back here... maybe even a pulse severe downburst with these things loaded with water as long as we can organize a couple updrafts. Shear is low... but not 0... so maybe that's enough to tip things IF we realize decent instabilty.

Yeah I see that out your way too. Just hope we can get some of that east. GFS and Euro seem robust even here, but I'm not so sure it's that widespread as it shows for this area. I could see some good rains if a low does develop.

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Yeah that part slowly starts to go away at our age...lol.

lol no kidding. I think I would have had a chance to see the AB last night up there (45N)... they also had a nasty severe storm in the afternoon just south of where I was staying. I never time vacations well... although the weather was beautiful for the last 7 days.

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