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November 26-28 Coastal Storm Discussion and Obs


DCAlexandria

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  On 11/25/2013 at 2:49 PM, usedtobe said:

I thought that was what the euro did with its ens mean at about 2.25

Haven't looked at last nights yet. There is a tropics connection but 3" would be pretty big for time of yr.
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  On 11/25/2013 at 2:51 PM, Ian said:

Haven't looked at last nights yet. There is a tropics connection but 3" would be pretty big for time of yr.

It would be really big time for this time of year but not completely unheard of.   Right now I'd certainly go for more than 2 inches and probably would make a 2 to 3 inch forecast.  It's gonna be wet. 

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  On 11/25/2013 at 2:54 PM, MN Transplant said:

When has the NAM ever failed us by shooting too high in winter precip events?

I'm mostly just stunned by the consistency. Usually there is a run in there that will be significantly different.

Last night's Euro was over 3 at dca and it's qpf is usually pretty good. 

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  On 11/25/2013 at 2:56 PM, usedtobe said:

It would be really big time for this time of year but not completely unheard of.   Right now I'd certainly go for more than 2 inches and probably would make a 2 to 3 inch forecast.  It's gonna be wet. 

Yeah, hard to disagree with that much.  But I'd still have to take the under 3" at any one point locally.

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FYI...probably another round coming after the noon guidance:

 

  Quote

MDZ003-501-502-VAZ025>031-503-504-WVZ050>053-055-501>506-252300-
/O.NEW.KLWX.WW.Y.0031.131126T0800Z-131126T2100Z/
WASHINGTON-EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-
AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-
WESTERN HIGHLAND-EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-
JEFFERSON-HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-
EASTERN MINERAL-WESTERN PENDLETON-EASTERN PENDLETON-
INCLUDING THE CITIES OF...HAGERSTOWN...FROSTBURG...CUMBERLAND...
STAUNTON...WAYNESBORO...HARRISONBURG...WINCHESTER...FRONT ROYAL...
HIGHTOWN...MONTEREY...MARTINSBURG...CHARLES TOWN...MOOREFIELD...
BAYARD...MOUNT STORM...PETERSBURG...ELK GARDEN...KEYSER...
FORT ASHBY...CIRCLEVILLE...FRANKLIN
958 AM EST MON NOV 25 2013

 

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 4 PM EST
TUESDAY...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED A WINTER WEATHER ADVISORY FOR SNOW...SLEET AND FREEZING
RAIN...WHICH IS IN EFFECT FROM 3 AM TO 4 PM EST TUESDAY.

* PRECIPITATION TYPE...PRECIPITATION WILL START AS A PERIOD OF
SNOW AND SLEET LATE TONIGHT THEN WILL LIKELY CHANGE TO FREEZING
RAIN TUESDAY MORNING.

* ACCUMULATIONS...UP TO AN INCH OF SNOW AND SLEET BY TUESDAY
MORNING FOLLOWED BY AROUND A TENTH OF AN INCH OF FREEZING RAIN
TUESDAY AFTERNOON.

* TIMING...BEGINNING BETWEEN 3 AM AND 6 AM AND CONTINUING THROUGH
LATE AFTERNOON TUESDAY.

* TEMPERATURES...IN THE MID TO UPPER 20S TONIGHT AND LOWER 30S
TUESDAY.

* WINDS...BECOMING NORTHEAST 5 MPH.

* IMPACTS...THE COMBINATION OF SNOW...SLEET AND FREEZING RAIN WILL
PRODUCE SLIPPERY CONDITIONS LATE TONIGHT THROUGH TUESDAY
AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.
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  On 11/25/2013 at 3:08 PM, Clueless said:

I think Wes is right. I would be really surprised if we got over 3 inches.

I would take the under but wouldn't be surprised if someone got more.   Such high moisture flux on the SREF ens mean suggests this is not a run of the mill rainfall event but a higher end one. 

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  On 11/25/2013 at 3:10 PM, usedtobe said:

I would take the under but wouldn't be surprised if someone got more.   Such high moisture flux on the SREF ens mean suggests this is not a run of the mill rainfall event but a higher end one.

I think 3 inches is pretty significant. It we go beyond, then it is one for the books. We have been so dry, I am on the welcome train here.

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