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VA/WVA/MD/DC CHRISTMAS 2010 OBS THREAD


Midlo Snow Maker

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It is painful watching local radar- almost looks a like a snow shield is cover the beltway- is that the NW wind pushing everything away for now?

FWIW: I checked this a little more than 15 minutes ago (when I went out to look for flurries lol) and it was stopped at Beltway in PG County to east. Now, its at least over half of DC.. The northwest push is one.

http://www.accuweather.com/us/radar/sir/dca/radar.asp

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http://forecast.weather.gov/MapClick.php?site=jax&zmx=1&zmy=1&map.x=224&map.y=145

Down to 1002.9(lowest I could find). South wind suggest the low still hasent passed the reporting station.

Radar showing precip really starting to explode north into NC.

SREF's show low stalling close to MD coast may not be too far off, seems as if the low is bombing out faster. The faster it bombs, the farther west it goes and faster it will occlude.

-Nor

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http://forecast.weat...x=224&map.y=145

Down to 1002.9(lowest I could find). South wind suggest the low still hasent passed the reporting station.

Radar showing precip really starting to explode north into NC.

SREF's show low stalling close to MD coast may not be too far off, seems as if the low is bombing out faster. The faster it bombs, the farther west it goes and faster it will occlude.

-Nor

Man, you beat me to it. I found 1002.4mb (buoy- http://www.ndbc.noaa.gov/station_page.php?station=frdf1) with SSE winds. Def seems to be bombing out more rapidly.

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Light-Mod snow here now......Amazing how the northern edge keeps getting squashed over NOVA. I know this is not the time period where we get our "good snow", but a nice pre game, a-la-Richmond, makes things look better. SC upstate looks promising, but really progressive for us in DC area,

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Any thoughts on what this means for DC?

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

1130 PM EST SAT DEC 25 2010

VALID DEC 26/0000 UTC THRU DEC 29/1200 UTC

...

THE NAM AND GFS ARE 3-4 HPA TOO WEAK WITH THIS SYSTEMS

SURFACE LOW...BOTH MISSING OUT ON A LARGE ENOUGH 1008 HPA ISOBAR

THAT SHOULD HAVE BEEN CAUGHT BY THE GUIDANCE...WHICH COULD

INDICATE THEIR SURFACE LOW CENTRAL PRESSURE SOLUTIONS WILL BE

SLIGHTLY TOO WEAK OVER THE NEXT DAY OR TWO.

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Any thoughts on what this means for DC?

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

1130 PM EST SAT DEC 25 2010

VALID DEC 26/0000 UTC THRU DEC 29/1200 UTC

...

THE NAM AND GFS ARE 3-4 HPA TOO WEAK WITH THIS SYSTEMS

SURFACE LOW...BOTH MISSING OUT ON A LARGE ENOUGH 1008 HPA ISOBAR

THAT SHOULD HAVE BEEN CAUGHT BY THE GUIDANCE...WHICH COULD

INDICATE THEIR SURFACE LOW CENTRAL PRESSURE SOLUTIONS WILL BE

SLIGHTLY TOO WEAK OVER THE NEXT DAY OR TWO.

It means the GFS and NAM aren't seeing the depth of this low. Might lead more credence to SREFs being closer in. These small changes mean little up north, but can definitely affect us.

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Any thoughts on what this means for DC?

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

1130 PM EST SAT DEC 25 2010

VALID DEC 26/0000 UTC THRU DEC 29/1200 UTC

...

THE NAM AND GFS ARE 3-4 HPA TOO WEAK WITH THIS SYSTEMS

SURFACE LOW...BOTH MISSING OUT ON A LARGE ENOUGH 1008 HPA ISOBAR

THAT SHOULD HAVE BEEN CAUGHT BY THE GUIDANCE...WHICH COULD

INDICATE THEIR SURFACE LOW CENTRAL PRESSURE SOLUTIONS WILL BE

SLIGHTLY TOO WEAK OVER THE NEXT DAY OR TWO.

The stronger the LP, the further west it comes.

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