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The March 25-March 32 HECS potential


Ji

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can we expect a burst in there?...or will it be off and on -SN at 35 degrees that gives us a 0.5"?

 

doesnt look like we get much more than .1 in any 6 hour period.. i'd kind of write off the daytime stuff for now personally. t-1 seems like a safe call for us at this pt.

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yea, it's spread out longer and warmer. IAD had a .22 6hr period w/ below freezing surface last run. Now it's a long drawn out light event even though the total is good.

 

 

MON 00Z 25-MAR   6.5    -3.4    1008      53      99    0.04     549     542    MON 06Z 25-MAR   0.8    -4.3    1007      95     100    0.12     545     540    MON 12Z 25-MAR   0.5    -5.6    1006      97     100    0.15     539     534    MON 18Z 25-MAR   2.4    -5.4    1005      92      96    0.12     535     531    TUE 00Z 26-MAR   1.1    -5.8    1009      99      98    0.11     534     528 
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Not "terrible" at dc but you can easily what a small dif w/ the primary makes on temps. 

 

 

MON 06Z 25-MAR   1.2    -4.0    1007      94     100    0.13     546     540    MON 12Z 25-MAR   0.6    -5.2    1006      96     100    0.17     539     534    MON 18Z 25-MAR   1.7    -4.4    1004      96      96    0.18     535     532    TUE 00Z 26-MAR   1.4    -5.7    1008      97      98    0.14     534     528 
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Not "terrible" at dc but you can easily what a small dif w/ the primary makes on temps. 

 

 

MON 06Z 25-MAR   1.2    -4.0    1007      94     100    0.13     546     540    MON 12Z 25-MAR   0.6    -5.2    1006      96     100    0.17     539     534    MON 18Z 25-MAR   1.7    -4.4    1004      96      96    0.18     535     532    TUE 00Z 26-MAR   1.4    -5.7    1008      97      98    0.14     534     528 

 

psssst....BWI?   :hug:

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doesnt look like we get much more than .1 in any 6 hour period.. i'd kind of write off the daytime stuff for now personally. t-1 seems like a safe call for us at this pt.

You would think that, but temps for the major thoroughfares are not overly warm at the surface on the euro. The 6 hour periods at DCA are .13, .18, .17 and .14 with surface readings at 1.2, 0.6, 1.7, and 1.4 respectively. The Euro is sometimes warm at the surface, and though the panels are not overly heavy in terms of precip, I have seen the euro do something like this in the past where it is light on QPF in these types of events.

In retrospect, this event obviously looks like a cartopper that many are accustomed to this winter, but the backside ULL is a situation that can certainly help those cash in around the cities even. Surface temps are cooling at the tail end of the precip to near 32 even on the Euro, and with the QPF now modeled to be more significant, the temperatures could work out better if a blend of the models were to be taken.

I won't bring up the Canadian as you guys do not prefer it much, but the euro with regards to the LP evolution went in that way to a certain extent. That may be one thing that is not the best of outcomes.

Cold 850's do not hurt, more of an earlier in winter factor, but it can't hurt to be present if you're someone hoping for this one.

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psssst....BWI?   :hug:

 

best 6hr panel of the 3. .6 overall too. Just can get it to drop mostly at night..... should be good window watching verbatim. Who knows at this point. Maybe the next move the euro makes is to let the coastal get stronger and get us in the heavies w/ slightly better temps....

 

 

 

MON 06Z 25-MAR   1.8    -4.2    1007      87      99    0.10     546     540    MON 12Z 25-MAR   0.9    -6.1    1007      96     100    0.13     540     535    MON 18Z 25-MAR   1.9    -4.4    1005      95      97    0.21     535     532    TUE 00Z 26-MAR   2.3    -5.9    1008      88      99    0.17     534     528    
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best 6hr panel of the 3. .6 overall too. Just can get it to drop mostly at night..... should be good window watching verbatim. Who knows at this point. Maybe the next move the euro makes is to let the coastal get stronger and get us in the heavies w/ slightly better temps....

 

 

 

MON 06Z 25-MAR   1.8    -4.2    1007      87      99    0.10     546     540    MON 12Z 25-MAR   0.9    -6.1    1007      96     100    0.13     540     535    MON 18Z 25-MAR   1.9    -4.4    1005      95      97    0.21     535     532    TUE 00Z 26-MAR   2.3    -5.9    1008      88      99    0.17     534     528    

 

Not bad at all and I usually run a few degrees colder than BWI. Maybe I actually have a chance at 2-3".

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Not bad at all and I usually run a few degrees colder than BWI. Maybe I actually have a chance at 2-3".

I really like set ups where the backside precip works in like some of the models have it. ULL related snow has been a success for this area in a few past instances (i.e. 3/09, 1/11) I'd expect the heavy precip to start being modeled better, and colder temps meeting the American guidance in the middle. The h5 track isn't one that kills, and really the strength of primary vs. coastal is something that could still require some ironing out. 

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Not bad at all and I usually run a few degrees colder than BWI. Maybe I actually have a chance at 2-3".

uh boy...that has the 3/6 storm surface temps written all over it imby

again, I'm gunna' need rates

the hope is maybe the models are onto a stronger system and will up the qpf in future runs

plenty of time one way or the other I suppose

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1-3 for western guys and  T-1 for DC guys...maybe a random 1.5"....sound right for now?

 

yep. I've pretty much though that 1-3 from 95 and points west would be best case. Upper moco, parrs, jyo, etc having the best chance for the higher end. Seeing the euro drag it out for 24 hours isn't a good thing. Maybe the ull surprises with a nice period of rates. It's a pretty good pass on both the euro/gfs

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uh boy...that has the 3/6 storm surface temps written all over it imby

again, I'm gunna' need rates

the hope is maybe the models are onto a stronger system and will up the qpf in future runs

plenty of time one way or the other I suppose

But if you don't have the killer east winds this time, plus stronger cold air up north this should fare better for us. Even by me 2" would be a huge win.

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yep. I've pretty much though that 1-3 from 95 and points west would be best case. Upper moco, parrs, jyo, etc having the best chance for the higher end. Seeing the euro drag it out for 24 hours isn't a good thing. Maybe the ull surprises with a nice period of rates. It's a pretty good pass on both the euro/gfs

 

I don't think anything less than about 0.2 mi viz sticks to the street except maybe above 800'?...barely  sticking on the boardwalk right now and they are 29-30 and getting it pretty good

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Actually I will throow it out there....below 500' what surface temps/rates would we need to have street stickage during daylight and mulch/grass/bush stickage

 

I'd say

 

<= 33 and 1/4 mi viz for street stickage

<=34 and 0.8mi viz for grass/bushes

<=35 and 1mi viz for cartops and shaded decks

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doesn't matter to me why, but it will be bl temps again

close enough for my simple, weenie mind

 

 

Euro is about 1-2C colder on BL temps than it was prior to the 3/6 bust. This would be a better airmass. Not to say that I would start predicting accumulations for I-95, but if future runs decide they want to boost the QPF, then there would be a legit reason to think this will perform better than that storm...at least for the areas it busted.

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Not "terrible" at dc but you can easily what a small dif w/ the primary makes on temps. 

MON 06Z 25-MAR   1.2    -4.0    1007      94     100    0.13     546     540    MON 12Z 25-MAR   0.6    -5.2    1006      96     100    0.17     539     534    MON 18Z 25-MAR   1.7    -4.4    1004      96      96    0.18     535     532    TUE 00Z 26-MAR   1.4    -5.7    1008      97      98    0.14     534     528

 

.03"/hr isn't going to do anything besides mood flakes and cold cartop stickage, which will then melt when the sun comes up.

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