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February storm threat discussion


Ellinwood

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I've tried googling my question and can't seem to find the answer. Is the CMC 6hr precip measured in mm, hundredths of mm's, or in hundredths of inches? Thanks in advance for the help.

Yeah, I know, I know, it's the CMC.

It depends what site you view it on...if you are viewing it on ewall here:

http://www.meteo.psu.edu/~gadomski/CMC_12z/cmcloop.html

Then its in hundreths of an inch.

If you are viewing it on the canadian site

http://www.weatheroffice.gc.ca/model_forecast/global_e.html

Then the precip is in mm.

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i'd probably wager we get something tho probably not a lot and a slip to the south is still fairly likely.

When this close in, you generally want a lot of operational support...GFS ensembles were interesting, but the OP run of it and the NAM are still nothing...UKMET is a bit interesting though as its definitely a better model than the CMC. You'd obviously want to see the Euro jump on board within 3 days if you were to forecast any snow.

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When this close in, you generally want a lot of operational support...GFS ensembles were interesting, but the OP run of it and the NAM are still nothing...UKMET is a bit interesting though as its definitely a better model than the CMC. You'd obviously want to see the Euro jump on board within 3 days if you were to forecast any snow.

euro had some precip last night.. im not talking a lot on my end. like a trace to .1" liquid type stuff for now. overall very low confidence..

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the canadian is awful. but if there's a situation where we overperform around here based on expectations this is how it can come together. last sref run was not so hot but prior one was not bad. it'd be fairly difficult to have a dry forecast with much confidence.

The Canadian actually did fairly well with our one "event " of this winter 2 weeks ago. We will see how you feel when the Euro jumps on board.

MDstorm

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The Canadian actually did fairly well with our one "event " of this winter 2 weeks ago. We will see how you feel when the Euro jumps on board.

MDstorm

eh maybe if you are cotton picking. it was certainly more bullish than actuality. and one storm is not a good way to measure accuracy over time. im not sure i need to feel any way unles you want me to call for 3-6" or something. im already giving it more chance than plenty of people.

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:o

When I saw the GFS, I thought it may have been too supressed.

Its pretty warm though at the sfc...so it would probably be cold rain changing to snow before ending. Its not a lot of precip, but maybe like 0.20" where the 00z run had just a few hundreths...but in a terrible winter, anything is worth watching.

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Its pretty warm though at the sfc...so it would probably be cold rain changing to snow before ending. Its not a lot of precip, but maybe like 0.20" where the 00z run had just a few hundreths...but in a terrible winter, anything is worth watching.

Hey, .20 is a blizzard around here. Now we gotta make it all snow.

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Its pretty warm though at the sfc...so it would probably be cold rain changing to snow before ending. Its not a lot of precip, but maybe like 0.20" where the 00z run had just a few hundreths...but in a terrible winter, anything is worth watching.

You should probably qualify "too warm" ...12z Euro is mid/upper 30s at the surface with 850s in the -2 to -4 range for DC northward. Not too shabby for people looking for snow 60 hours out.

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You should probably qualify "too warm" ...12z Euro is mid/upper 30s at the surface with 850s in the -2 to -4 range for DC northward. Not too shabby for people looking for snow 60 hours out.

Well at 60 hours, the sfc temp is like 40F for DC and upper 30s for the suburbs (and low 40s SE of DC)...so that is pretty warm to start, but then it cools. That's why I said it would probably be rain changing to snow if Euro was taken at face value.

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:o

When I saw the GFS, I thought it may have been too supressed.

Gfs doesn't phase the northern vort. Instead it acts like confluence crushing this storm. The ggem, jma, ukie and now euro, all phase the northern vort which as a result expands the precip north.

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This and the fact that I hardly ever take euro qpf too seriously

lolz

if anything it's possible it runs a little warm at the surface but im sure you're riding the cmc or whichever model has the best outcome...

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