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The Second Wave: Dec 10 (Model Discussion)


stormtracker

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I don't really have any confidence in QPF distribution.  I am going to assume the heaviest bands will set up NW of the beltways

 

Just showing verbatim output. And I don't disagree until radar tells me otherwise. 

 

There is hope though. Nice UVV's and a system that clears the area. 

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and anyone who complains how much more this would be if we had blocking so the storm could slow should be banned!

this is a great pattern for us and proves that snow is possible without the traditional indices in our favor

 

This is a good point Mitch. The primary difference this year compared to many recent ones is the pv in canada and arctic outbreaks. Reminds me of old school stuff of the 70s and 80's. Many of the cpc d8-11 analogs have been 70s and 80s recently. It's pac driven this year so it's not "stable" but man it's been persistent for a while. Now ens guidance is pointing towards goa and west coast ridging down the road. Not as cold but still. Lets stay active. 

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I'm waiting for the high res ones. Kinda slow. 12k ones show relatively uniform distribution of 3-5 with 6 inches to the sw of dc. 

 

You just know that it won't be until the storm starts that we see where the jackpot bands set up.  I know where to guess

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and anyone who complains how much more this would be if we had blocking so the storm could slow should be banned!

this is a great pattern for us and proves that snow is possible without the traditional indices in our favor

 

No kidding! I thought we needed a +EPO -NOA +WPO +++AO ++ASS and 350Ft/lb of mountain torque to see a snowflake

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and anyone who complains how much more this would be if we had blocking so the storm could slow should be banned!

this is a great pattern for us and proves that snow is possible without the traditional indices in our favor

 

southern stream...it makes a world of difference and until it shuts off, with so much cold air around, I shouldn't be very determiistic about our chances.  

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No kidding! I thought we needed a +EPO -NOA +WPO +++AO ++ASS and 350Ft/lb of mountain torque to see a snowflake

 

I got frustrated the last few winters as to why we couldn't get an old school 2-4" snowfall.   The ones we used to get with some regularity when the pattern wasn't ideal....and it is clear for many  of them we had a southern stream.  Plus I think the +PDO regime from 76-2007 helped.  Otherwise without it you need a tricky phase or a clipper.  

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Sterling pretty bullish for me...3-5"....I think 2-4" is a better forecast, but nice that all guidance is coalescing

Looked to me like the euro liked you 2-4.  This is one of those storms when it was late to the ball game and one where the NAM looks like it might have been the most consistent model.  What a shocker. 

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DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-
NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-AUGUSTA-ROCKINGHAM-SHENANDOAH-
FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-ALBEMARLE-GREENE-MADISON-
RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-NORTHERN FAUQUIER-
SOUTHERN FAUQUIER-BERKELEY-JEFFERSON-
INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK...
WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS...
STAUNTON...WAYNESBORO...HARRISONBURG...WINCHESTER...FRONT ROYAL...
CHARLOTTESVILLE...LEESBURG...CULPEPER...MANASSAS...
MANASSAS PARK...FAIRFAX...ALEXANDRIA...FALLS CHURCH...WARRENTON...
MARTINSBURG...CHARLES TOWN
1009 AM EST MON DEC 9 2013

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM LATE
TONIGHT THROUGH TUESDAY AFTERNOON.

* PRECIPITATION TYPE...POTENTIAL FOR HEAVY SNOW. THE PRECIPITATION
  MAY START AS A PERIOD OF SLEET...ESPECIALLY SOUTH OF INTERSTATE
  66 IN VIRGINIA...THE DISTRICT OF COLUMBIA...AND U.S. ROUTE 50 IN
  MARYLAND.

* ACCUMULATIONS...POTENTIAL FOR FIVE INCHES OR MORE OF SNOW.

* TIMING...NEAR DAWN TUESDAY THROUGH EARLY TUESDAY AFTERNOON...INCLUDING
  THE TUESDAY MORNING RUSH HOUR.

* TEMPERATURES...UPPER 20S AND LOWER 30S.

* WINDS...NORTH 5 TO 10 MPH.

 

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