12/17/18 Disco/Obs - Rain/Wind Event

[RDM]

2.05" so far here...   

[pazzo83]

2.5" in NW DC.

[EastCoast NPZ]

1.16" 

Unless there is some sort of pivot to get precip on a more westerly track, the show is going to be over pretty soon for us out here.  That's an impressive fetch headed north towards DC.

[Steve25]

33 minutes ago, stormtracker said:

Why do you always do this?  You will be insufferable come game time.

If the heaviest precip doesn't last for at least 16 hours consistently, it's a bust! 

[Jeff B]

1.73 was Sunday’s total. Pouring and the moment with more heavy returns coming up from the south.

[Jebman]

49 minutes ago, SnowLover22 said:

You’re right that you can, my point is it is harder. The answer is a bit complicated.

 

Part of the answer is in the physical process of rain and snow formation and how fast they fall.

 

Rain forms through liquid droplets coalescing in the atmosphere creating larger and heavier droplets that can fall quicker under the force of gravity

 

Snowflakes form when water vapor turns directly into ice crystals. 
 

Snowflakes form at a slower rate than rain droplets and obviously the structure is different with air pockets within the snow flake causing them to be lighter than rain drops.

Thus,
 

Rain can physically fall at a faster rate than snow and rain forms at a faster rate.

 

This explains it better.

 

https://geo.libretexts.org/Bookshelves/Geography_(Physical)/The_Physical_Environment_(Ritter)/07%3A_Atmospheric_Moisture/7.04%3A_Clouds_and_Precipitation/7.4.03%3A_Precipitation_Process

Bergeron Process vs Warm-Rain Process 

Now assuming that one is dealing with the Bergeron Process for areas that get rain and areas that get snow, rain will still fall at a faster rate due to structure differences between a snow flake vs rain drop.

SnowLover22 you are a genius. Thank you very much. The entire document is now on my drive cloud as well as on my 5G tablet. I can tell you, I will be GLUED to this entire document thru the night. Thanks again. You have made my day.

[pazzo83]

2" at DCA.

[jayyy]

Gauge showing over 1.2” over the past 6 hours alone. Easily over 2” for the event.


.

[mappy]

2.96" and still raining. 

[SnowtoRain]

3.05"

[Jeff B]

2.6” for the event with light drizzle.

[Mrs.J]

6 hours ago, pazzo83 said:

what do you have?  I have one of the Ambient Weather models.

I have an Ambient also. 
 

2.74 total over here. 

[EastCoast NPZ]

Just like last week, another underperformer out here.  Forecasted 2 - 3 got me 1.31".  I forgot how much I disliked these coastal systems where we get 1/2 the precip of the rest of you.

[CAPE]

2.35"

[dailylurker]

12 minutes ago, EastCoast NPZ said:

Just like last week, another underperformer out here.  Forecasted 2 - 3 got me 1.31".  I forgot how much I disliked these coastal systems where we get 1/2 the precip of the rest of you.

Oh stop. You'll get double the snow out there then here in the lowland swamps when we get a colder storm. 

Wind is starting to roar through the woods. I had about 3" of rain here I'd estimate. 

[nw baltimore wx]

3.11”

A lot of standing water in the neighborhood..

[GATECH]

2.26” storm total

[nj2va]

NWS upped totals for the mountains. Wisp and Canaan cams will be fun later today. 
 

[weatherCCB]

2.48” total

48 and wind picking up

[katabatic]

0.44" in the bucket. 34.2 (falling from 39.0 at midnight) and as @nj2va mentions above, it is the post-intermission part of this storm out here that'll count. 

[H2O]

2.06”

[stormy]

1.26" total.    Western mts. not so lucky, Monterey only received .33".

[aldie 22]

Looks like 2.38" for the event....not bad...4.91" for December. Grass should be nice and green come New Years

[Ravens94]

Starting to change to snow in elder hill 34 and the wind is picking up

[Kay]

1.8" in the gauge this morning for a total of 3.5"

[George BM]

2.27" total at IAD.

[SnowGolfBro]

1 hour ago, nj2va said:

NWS upped totals for the mountains. Wisp and Canaan cams will be fun later today. 
 

Im in Canaan for this storm. Windy and now below freezing. Let’s go!

[wxdude64]

Only 0.41 when I dumped the CoCoRaHS this morning. SHARP cutoff from I-81 west on the rain totals. But the WIND is roaring lol. Stuck at 40-42 all day and night until around 1 am, then it spiked to a 47 high before starting to fall and the winds began to crank. 'Shoe and Canaan have already went to snow, along with the Rt 250 camera in Highland Co. Currently 39.9/34.3 and falling with a NW wind at 14 gusting to 27 mph. MAYBE the flakes make it here later??? 

[The Dude]

2.81" for the storm

[CentredMan]

2.34" in Centreville