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December Obs and Banter


WinterWxLuvr

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So the xmas s/w and s/w that causes the Miller A-B storm both originate from the E PAC trough / developing Omega Block. These two waves kick out as the block shoots over the N.P. to merge with the -NAO block. I can't imagine why the last 4 GFS runs have all been very different!

Time to sample the North Pacific! Send out the crews...

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OK, let' me put this in the right thread, stuck it in wrong one earlier.....

Well, isn't this a surprise......sleet and 39 degrees. About 25 minutes of pure sleet, just enough to whiten the elevated decks and car windshields. Now a mix of rain and sleet. Had about 0.03 liquid precip so far. Another big miss by forecast, they were calling for rain showers by late afternoon and a 48 high.

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I realize that Wes isn't honking for the New Year pattern, but I do like when he starts to make posts like the one below. Given very limited knowledge, it even seems to me like the pattern - as modeled - is looking pretty good for early January, and is certainly the best look we've had so far.

If anyone sees Lucy, give her a forearm shiver to the throat.

I don't have much to say except that the super ensemble mean for D+8 is the nicest so far by far. The pattern is shown has 3 analogs that produced a 4 inch storm within 3 days of the centered mean, dec 1966, Dec 2009, Jan 1, 2001. It also had another that fell witin 5 days. That big of storm is so limo unusual that having 3 analog dates clustered that closely suggests that the pattern finally is one that is above average for snowfall. The D+11 also isn't that different. I looked for the D+11 Centered mean from Dec 2009 I know I posted it on Eastern back in the day but must have deleted it and then eastern lost all the graphics for the dec thread.

Anyway, here's the 500,

post-70-0-87687900-1356028019_thumb.gif

I still suspect that the coming storm post christmas will be mostly rain but not with nearly as much confidence as earlier. The pattern on the superens mean is a pretty good one through the new year. Of course the models have been all over the place so it would be nice to see the pattern hold for a few days before going completely ga ga on it.

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URGENT - WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

211 PM EST THU DEC 20 2012

DCZ001-MDZ003>007-009>011-013-014-016>018-501-VAZ027>031-039-040-

042-050>057-501>503-WVZ051>053-501-503-505-210315-

/O.NEW.KLWX.HW.A.0003.121222T1100Z-121222T2300Z/

DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-

NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-

PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-

EXTREME WESTERN ALLEGANY-SHENANDOAH-FREDERICK VA-PAGE-WARREN-

CLARKE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-

PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-

ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-

KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-

MORGAN-BERKELEY-JEFFERSON-WESTERN GRANT-WESTERN MINERAL-

WESTERN PENDLETON-

INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK...

WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS...

WALDORF...ST MARYS CITY...FROSTBURG...WINCHESTER...FRONT ROYAL...

LEESBURG...CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...

ALEXANDRIA...FALLS CHURCH...FREDERICKSBURG...WARRENTON...

HIGHTOWN...MARTINSBURG...CHARLES TOWN...BAYARD...MOUNT STORM...

ELK GARDEN...CIRCLEVILLE

211 PM EST THU DEC 20 2012

...HIGH WIND WATCH IN EFFECT FROM SATURDAY MORNING THROUGH

SATURDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS

ISSUED A HIGH WIND WATCH...WHICH IS IN EFFECT FROM SATURDAY

MORNING THROUGH SATURDAY AFTERNOON.

* TIMING...FOR MUCH OF THE DAY SATURDAY...ESPECIALLY DURING THE

DAYLIGHT HOURS.

* WINDS...WEST WINDS OF 30 TO 40 MPH...WITH PEAK GUSTS AROUND 60

MPH.

* IMPACTS...DOWNED TREES AND POWERLINES WILL BE POSSIBLE FROM THE

HIGHER WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A HAZARDOUS

HIGH WIND EVENT. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF

58 MPH OR STRONGER MAY OCCUR. CONTINUE TO MONITOR THE LATEST

FORECASTS.

&&

$$

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URGENT - WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

211 PM EST THU DEC 20 2012

DCZ001-MDZ003>007-009>011-013-014-016>018-501-VAZ027>031-039-040-

042-050>057-501>503-WVZ051>053-501-503-505-210315-

/O.NEW.KLWX.HW.A.0003.121222T1100Z-121222T2300Z/

DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-

NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-

PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-

EXTREME WESTERN ALLEGANY-SHENANDOAH-FREDERICK VA-PAGE-WARREN-

CLARKE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-

PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-

ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-

KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-

MORGAN-BERKELEY-JEFFERSON-WESTERN GRANT-WESTERN MINERAL-

WESTERN PENDLETON-

INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK...

WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS...

WALDORF...ST MARYS CITY...FROSTBURG...WINCHESTER...FRONT ROYAL...

LEESBURG...CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...

ALEXANDRIA...FALLS CHURCH...FREDERICKSBURG...WARRENTON...

HIGHTOWN...MARTINSBURG...CHARLES TOWN...BAYARD...MOUNT STORM...

ELK GARDEN...CIRCLEVILLE

211 PM EST THU DEC 20 2012

...HIGH WIND WATCH IN EFFECT FROM SATURDAY MORNING THROUGH

SATURDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS

ISSUED A HIGH WIND WATCH...WHICH IS IN EFFECT FROM SATURDAY

MORNING THROUGH SATURDAY AFTERNOON.

* TIMING...FOR MUCH OF THE DAY SATURDAY...ESPECIALLY DURING THE

DAYLIGHT HOURS.

* WINDS...WEST WINDS OF 30 TO 40 MPH...WITH PEAK GUSTS AROUND 60

MPH.

* IMPACTS...DOWNED TREES AND POWERLINES WILL BE POSSIBLE FROM THE

HIGHER WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A HAZARDOUS

HIGH WIND EVENT. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF

58 MPH OR STRONGER MAY OCCUR. CONTINUE TO MONITOR THE LATEST

FORECASTS.

&&

$$

Wind and cold. My least favorite weather except heat.

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