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February storm threat discussion


Ellinwood

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well, then we disagree

anyone can go to the Wunderground site and look at the accumulating snow on the 12Z Euro

if my statement that there is no accum snow east of the mts is that flawed, sue me

It's cool, Mitch. I wasn't trying to point out any error. I was just saying that it did get some snow into our area.

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Well the 0.25 QPF line is down more by EZF... but the color fill is close to DCA

At 9z the 0.1 line was near Wilmington NC. Now its near CHO. That's a big jump. You can also tell be the fact that there is only one area of precip now (basically) that its handling it differently than before.

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we may end up with light rain/non accumulating snow but the NAM is wrong....I give it zero credence....

yeah i think the question at this point is what if anything sticks. i'd lean toward something but not confidently.

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yeah i think the question at this point is what if anything sticks. i'd lean toward something but not confidently.

I think a good solution is an outlier too....the most likely solution is not a very good one....which is rain changing to steady light snow falling for a few hours overnight at 34 degrees and giving us a cartop 0.25" which will be melted by the time we wake up and it is 43

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Afternoon disco from LWX is very hedgy

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...

-- Changed Discussion --

HIGH PRESSURE WILL REMAIN ANCHORED OVER THE FORECAST AREA FRIDAY

NIGHT BEFORE TRANSITIONING OFF THE MIDDLE ATLANTIC COAST ON

SATURDAY. A TROUGH OF LOW PRESSURE WILL DEVELOP OVER THE SOUTHWEST

UNITED STATES AND TRACK EAST INTO THE CENTRAL PLAINS FOR THE

START OF THE WEEKEND. SURFACE LOW PRESSURE WILL ALSO TAKE SHAPE AND

TRACK EAST SATURDAY AFTERNOON INTO SUNDAY. GFS AND ECMWF CONTINUE

TO INDICATE SIGNFICANT DIFFERENCES WITH THE TRACK OF THE SURFACE

LOW WITH THE GFS FURTHER SOUTH AND THE ECMWF FURTHER NORTH. EITHER

TRACK WILL IMPACT WEATHER IN THE CWFA TO VARYING DEGREES.

A SECONDARY TROUGH WILL ALSO TAKE SHAPE OVER THE GREAT LAKES LATE

SATURDAY NIGHT AND TRACK EAST ACROSS THE REGION ON SUNDAY. THE GFS

IS MORE PROGRESSIVE AND FURTHER NORTH WHILE THE ECMWF IS FURTHER

SOUTH AND SLOWER. THE SLOWER SOLUTION WOULD ALLOW DEEPER MOISTURE

TO BE DRAWN NORTHWARD INTO THE FORECAST AREA WITH GREATER IMPACTS

OVERNIGHT SATURDAY INTO SUNDAY. COLDER AIR WILL ALSO FILTER INTO

THE REGION WITH EITHER A MIX OR CHANGE TO SNOW OVER THE HIGHER

TERRAIN OUT WEST POSSIBLE. AT THIS TIME...WE DECIDED TO GO WITH A

COMPROMISE OF THE TWO SOLUTIONS BUT OVERALL CONFIDENCE REMAINS LOW

ATTM.

-- End Changed Discussion --

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It's better than nothing falling. And it might get better.

Yeah... skeptical on that one... I can't really picture a Sunday PM post along the lines of "the CMC caught the event days ahead of the other models and held serve while the GFS folded to it."

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At this point in time, some thought would have to be given to trends and not just what is being shown by any one model. Trend 1 - the SREFS took a huge jump. That would be hard to argue. Trend 2 - the vast majority of the GFS ens. members jumped to a wetter solution with several showing snow. Trend 3 - the Euro jumped to a wetter solution even if its temps are iffy. I think we have at least a reason to follow this a bit longer.

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Yeah... skeptical on that one... I can't really picture a Sunday PM post along the lines of "the CMC caught the event days ahead of the other models and held serve while the GFS folded to it."

im fairly confident people will give the cmc props if it snows even if it doesnt deserve it

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idk if it would end up being cold enough, but the 18Z RGEM has a nice slug of moisture to our west looking to hit us

we'll need some help with the building High pressure to the north

http://www.weatherof...YPES_t6_048.png

http://www.weatherof...st/3295_100.gif

EDIT: here's the animated precip map http://www.weatheroffice.gc.ca/model_forecast/animateweb_e.html?imagetype=model_forecast&imagename=18_054_R1_north@america_I_QPFTYPES_t6_....png

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At the core, it seems like our feast or famine winters are mostly to blame. Pretty frustrating. It's been a while since we've had a "climo" winter around here. We used to have plenty. Half dozen normal events and a mix of cold/warm/normal periods throughout the season.

We've had alot more "big" storms the last 10-12 years or so but much less "normal" stuff. I'm sure some of the snow stats guys on here can either confirm or debunk that statement but I'm pretty sure I'm right.

I'd much prefer a "climo" type of winter for once. I'd gladly give up the big storm in exchange for some normalcy and sanity. I'm probably speaking for most of the forum here.

For DCA/DC proper and eastward, you're right. For Rockville, MD, and other places in MoCo, there've been a lot more "near average" snowfall winters than you're probably remembering in the past 20 years.

See thread: http://www.americanwx.com/bb/index.php/topic/31503-feast-or-famine-wasnt-really-the-pattern-for-maryland-winters-west-of-the-fall-line/

The winters that were pretty different out here than DCA when compared to % seasonal averages were: 92/93, 98/99, 99/00, 03/04, 04/05, 05/06.

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