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1/25-1/26 Snow Threat


DDweatherman

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It's starting to get too complicated. I've been down this road too many times to count. Bombing miller b's have a habit of reducing our "easy" snow on the front and give us nothing on the back.

Under 3" region wide is very much a possibility. I just wanted a simple 3-6. There is time for things to get right but I'm not feelin it like I was the last few days.

Snow is never easy around here.
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If the model had you at 1.5" of liquid you'd stil be worried about the edge.

History suggests way more threats don't work out then do so looking fir what could go wrong seems logical to me. I'm pragmatic about it. Unless it's 12 hours before the start of a feb 6 2010 storm I never relax and feel totally safe. Keeps me from having the monumental let down and melt down when something goes wrong because I was ready for it. We all cope with our demons in our own way.
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Give me a couple minutes and I'll give you the breakdown of the entire event.

 

For Westminster.

 

Front end as follows. 6 hour period as you know ending is as follows

 .

0z Mon .01

6z Mon .07

12z Mon .04

18z Mon .05

0z Tue .02

6z Tue .03

 

This run looks a little too dry overall with the front end. Also we are in a weird precip hole after the first .08 falls starting 12z Mon lasting to 0z Tue. So it rips us off of about .07-.08 of qpf that every direction around us receives.

 

Backend/coastal

 

12z Tue .04

18z Tue .10

0z Wed .12

6z Wed .01

 

Total Qpf. about .5

Manchester actually would be a little higher with the coastal part since we are a bit more east.

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his reasoning rarely makes sense.  norfolk would likely be a mix and rain, more so than snow.  that's just the way it goes down there most of the time.

 

annapolis sometimes gets more snow than areas further west, but not that often.

 

you are in a bit of a tough spot, but if you want a lot of snow i hope it works out for you.

If the Euro idea works out, I am just as likely to get screwed as places further inland. The low will likely develop slower and go neg tilt too late for anywhere down here. Philly north does well if the Euro scenario plays out.

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Putting too much faith in the latest deterministic EC run is risky, especially 36-72 hours out. HOWEVER, what I am keying on here is the westward and quicker TREND of the bombogenesis. Even the operational GFS and UK show the left trends, though obviously not to the extent as the EC. Can't wait to see the latest EC ensembles...and evaluate their trends.

At this point, with a fluid Miller B such as this, the trend can certainly be your friend.

Didn't you guys go through this with the Feb 10th 2010 system? (I was at WFO AKQ at the time...we got def banded, but not nearly to the extent as here in the DC area).

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These transfers never work out well for us as far as the coastal. We can get good snow as the low is traversing from our west toward us, then the energy transfer and by the time it gets going along the coast we miss it. 2-4" as the low approaches and then likely zip as it transfers, there are exceptions but 90% of the time the scenario is as just described.

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Putting too much faith in the latest deterministic EC run is risky, especially 36-72 hours out. HOWEVER, what I am keying on here is the westward and quicker TREND of the bombogenesis. Even the operational GFS and UK show the left trends, though obviously not to the extent as the EC. Can't wait to see the latest EC ensembles...and evaluate their trends.

At this point, with a fluid Miller B such as this, the trend can certainly be your friend.

Didn't you guys go through this with the Feb 10th 2010 system? (I was at WFO AKQ at the time...we got def banded, but not nearly to the extent as here in the DC area).

I think our fate lies in how far off the coast the boundary sits from last night's storm. I'm not sure we'll know that until tomorrow.
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I fully expect last min changes to this. keeping your expectations in check is the best. don't let the inner weenie come out

 

The more I look at the Euro, the more that Dec 2010 haunts me (not actually a Miller B, but it effectively acted like one for our area)

 

I think most of us know how these systems usually work out for us.

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It's starting to get too complicated. I've been down this road too many times to count. Bombing miller b's have a habit of reducing our "easy" snow on the front and give us nothing on the back.

Under 3" region wide is very much a possibility. I just wanted a simple 3-6. There is time for things to get right but I'm not feelin it like I was the last few days.

This

 

Maybe we spook too easy and are panicking for nothing, but I'm bracing myself.  Been down here long enough to know the script when complications and transfers enter the picture.

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This

Maybe we spook too easy and are panicking for nothing, but I'm bracing myself. Been down here long enough to know the script when complications and transfers enter the picture.

At least enjoy the nice run for a while. Never seen such negativity after a good run. I think some of you would have been better off if the euro was a total miss screwjob.
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URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
249 PM EST SAT JAN 24 2015

MDZ004-005-503-505-VAZ028-031-505-WVZ052-053-250400-
/O.NEW.KLWX.WS.A.0001.150126T0200Z-150127T0200Z/
FREDERICK MD-CARROLL-NORTHWEST MONTGOMERY-NORTHWEST HOWARD-
FREDERICK VA-CLARKE-WESTERN LOUDOUN-BERKELEY-JEFFERSON-
INCLUDING THE CITIES OF...FREDERICK...WESTMINSTER...GERMANTOWN...
DAMASCUS...LISBON...WINCHESTER...PURCELLVILLE...MARTINSBURG...
CHARLES TOWN
249 PM EST SAT JAN 24 2015

...WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH
MONDAY EVENING...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM SUNDAY
EVENING THROUGH MONDAY EVENING.

* PRECIPITATION TYPE...SNOW...POSSIBLY HEAVY AT TIMES.

* ACCUMULATIONS...4 TO 6 INCHES.

* TIMING...SNOW WILL BEGIN SUNDAY EVENING AND CONTINUE THROUGH
LATE MONDAY AFTERNOON. THE HEAVIEST SNOWFALL WILL OCCUR BETWEEN
MIDNIGHT AND 8 AM MONDAY.

* TEMPERATURES...IN THE UPPER 20S.

* WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.

* IMPACTS...ROADS WILL BE SNOW COVERED AND SLIPPERY WITH
VISIBILITIES BEING REDUCED TO NEAR ONE-QUARTER MILE AT TIMES.
THE COMBINATION OF SNOW COVERED ROADS AND LOW VISIBILITY WILL
MAKE TRAVELING DANGEROUS.

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The more I look at the Euro, the more that Dec 2010 haunts me (not actually a Miller B, but it effectively acted like one for our area)

 

I think most of us know how these systems usually work out for us.

 

The difference here is that it is a pretty good bet you're going to see accumulating snow and probably at least a couple inches. Sure we all maybe looking from the outside if and I emphasize if the storms looks anything like what was just shown.

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For Westminster.

Front end as follows. 6 hour period as you know ending is as follows

.

0z Mon .01

6z Mon .07

12z Mon .04

18z Mon .05

0z Tue .02

6z Tue .03

This run looks a little too dry overall with the front end. Also we are in a weird precip hole after the first .08 falls starting 12z Mon lasting to 0z Tue. So it rips us off of about .07-.08 of qpf that every direction around us receives.

Backend/coastal

12z Tue .04

18z Tue .10

0z Wed .12

6z Wed .01

Total Qpf. about .5

Manchester actually would be a little higher with the coastal part since we are a bit more east.

I interpret that as probably 1-2" front end then 4-5" back end with high ratios. I would be ok with that the problem us we all know the bust potential if this shifts east at all. Of course with the h5 track I could see a compromise if the ggem/ec and we are happy.
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The more I look at the Euro, the more that Dec 2010 haunts me (not actually a Miller B, but it effectively acted like one for our area)

 

I think most of us know how these systems usually work out for us.

yea falling back on your history and outcomes on previous storms is best. models are fun to look at but rely on past experiences to temper expectations 

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