87storms Posted December 18, 2023 Share Posted December 18, 2023 I’m surprised at some of the meager rainfall reports. Feels like it’s been pouring for f’ing HOURS.I think 2” is in play across the region. Now we just need this when there’s an arctic high building in from Ontario and Quebec. 1 Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 1.7" here in Tenleytown - pouring. Link to comment Share on other sites More sharing options...
87storms Posted December 18, 2023 Share Posted December 18, 2023 1.7" hear in Tenleytown - pouring.Flood warnings just got issued in Moco. Haven’t seen that too often this year. Link to comment Share on other sites More sharing options...
Terpeast Posted December 18, 2023 Share Posted December 18, 2023 Just drove from Tysons to Ashburn, pouring. 1.2” here. Awful Link to comment Share on other sites More sharing options...
mattie g Posted December 18, 2023 Share Posted December 18, 2023 1 hour ago, SnowLover22 said: No need to imagine, the way thermodynamics work, it wouldn’t be that QPF if it were snow. It is why you can get 3 inches of rain per hour but not 30 inches of snow per hour. It doesn’t work like that. But it’s not at all unheard of for us to get 2-3” of QPF during a big southern stream storm in a Nino. I get that warmer air can hold more moisture, but that doesn’t mean we can’t pick up copious precip during cold storms given the right conditions. And please…I’m all ears to hear why I might be mistaken! Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 1 minute ago, mattie g said: But it’s not at all unheard of for us to get 2-3” of QPF during a big southern stream storm in a Nino. I get that warmer air can hold more moisture, but that doesn’t mean we can’t pick up copious precip during cold storms given the right conditions. And please…I’m all ears to hear why I might be mistaken! some place in SC got 13" of rain - absolutely insane for a non-tropical system. 2 1 Link to comment Share on other sites More sharing options...
mattie g Posted December 18, 2023 Share Posted December 18, 2023 Also…power flickered four times here in Burke about 20-30 minutes ago. Thought we were cooked come the second time. Fingers crossed it holds out! Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 looks like some back-filling coming in from the south - wonder if these are more squally so will have some winds with them. Link to comment Share on other sites More sharing options...
Jebman Posted December 18, 2023 Share Posted December 18, 2023 That rain shield is amazing! It's so BIG! I have snapped dozens of snapshots! There are HUMONGOUS GLOBS of solid yellow and even some RED up in there! I am so damned JEALOUS over all of your rain, it's not even funny. 1 Link to comment Share on other sites More sharing options...
Stormpc Posted December 18, 2023 Share Posted December 18, 2023 7 minutes ago, pazzo83 said: some place in SC got 13" of rain - absolutely insane for a non-tropical system. They are saying 15" plus now. With a dew point in the mid-60s down here there's some tropical characteristics for sure 2 Link to comment Share on other sites More sharing options...
Jebman Posted December 18, 2023 Share Posted December 18, 2023 11 minutes ago, Stormpc said: They are saying 15" plus now. With a dew point in the mid-60s down here there's some tropical characteristics for sure Wow they got to enjoy mid 60s dewpoints! Plus incredible torrential rains! I would have been out on one hell of an E-P-I-C jebwalk, right in the low water areas, just savoring the water levels rising all around me! Kind of like taking an epic jebwalk in the Bay of Fundy as the tide is coming in! Or the Holy Island Causeway in England as the tide is coming in! Man I am truly crrazy about rising waters! South Carolina is such a wonderful place to live, and it gets such incredible weather! Oh by the way folks. 7,000th Post. 2 Link to comment Share on other sites More sharing options...
Kay Posted December 18, 2023 Share Posted December 18, 2023 lwx 9:19 pm AFD/obs ETA forgot to add 1.7" here so far .NEAR TERM /THROUGH MONDAY NIGHT/... 989 mb low pressure center is located not too far from Cape Fear NC. Latest NAM has the best initialization in terms of position and magnitude, the GFS is not too far off, while Euro is more than 100 miles off with its position. So far, up to 1.32 inches of rain have fallen at Leonardtown MD (St. Mary`s County) with up to 0.6 inch per hour rainfall rates being observed at several locations. Rain will continue to pivot north and west of the low pressure center overnight. Southern MD will see a brief lull in intensity in the next couple hours, but another batch of moderate/heavy rain currently over northeastern NC will move in overnight. Latest guidance continue to indicate areas east of I-95, particularly southern MD will see the heaviest rain. Risk of flooding rainfall will continue overnight until the rain begins to exit around daybreak Monday. Wind Advisories were issued earlier for the potential for 40kt gust with the initial surge of winds behind exiting low pressure. Strongest winds are likely between 12Z-18Z before they start diminishing during the mid-late afternoon. 2 1 Link to comment Share on other sites More sharing options...
mappy Posted December 18, 2023 Share Posted December 18, 2023 1.46” so far and pouring. Was under some oranges for a bit earlier. 3 Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 Dews are in the 60s along the eastern shore with gusts of 60+ mph. I mean... 1 Link to comment Share on other sites More sharing options...
wxmeddler Posted December 18, 2023 Share Posted December 18, 2023 Wait for the PIVOT.. 2 2 Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 2" here. Link to comment Share on other sites More sharing options...
Mrs.J Posted December 18, 2023 Share Posted December 18, 2023 1.91” here so far. Will push over the 2” mark soon though. Link to comment Share on other sites More sharing options...
SnowLover22 Posted December 18, 2023 Share Posted December 18, 2023 51 minutes ago, mattie g said: But it’s not at all unheard of for us to get 2-3” of QPF during a big southern stream storm in a Nino. I get that warmer air can hold more moisture, but that doesn’t mean we can’t pick up copious precip during cold storms given the right conditions. And please…I’m all ears to hear why I might be mistaken! 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. 2 4 Link to comment Share on other sites More sharing options...
Steve25 Posted December 18, 2023 Share Posted December 18, 2023 I'm just so thankful my sump pump is working! Have been having issues with it. Kind of had to improvise to get it functional because I wasn't able to buy a new one before the storm. It's been chugging along really well! 5 Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 just pouring here - man. we are making a late run to close our annual precip deficit lol Link to comment Share on other sites More sharing options...
stormtracker Posted December 18, 2023 Share Posted December 18, 2023 3 hours ago, Eskimo Joe said: If the radar is to be believed, this thing is out of here by midnight or early tomorrow? Why do you always do this? You will be insufferable come game time. 4 2 3 Link to comment Share on other sites More sharing options...
stormtracker Posted December 18, 2023 Share Posted December 18, 2023 Anyway, pouring here, with heavier returns incoming from the south. 4 Link to comment Share on other sites More sharing options...
stormtracker Posted December 18, 2023 Share Posted December 18, 2023 21 minutes ago, pazzo83 said: 2" here. We're gonna make a run at 3 dude 1 Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 Just now, stormtracker said: We're gonna make a run at 3 dude easily. Link to comment Share on other sites More sharing options...
Mrs.J Posted December 18, 2023 Share Posted December 18, 2023 Over 2” here 2.07” to be exact. My station will dump data at midnight but will keep an event total. Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 Just now, Mrs.J said: Over 2” here 2.07” to be exact. My station will dump data at midnight but will keep an event total. what do you have? I have one of the Ambient Weather models. Link to comment Share on other sites More sharing options...
pazzo83 Posted December 18, 2023 Share Posted December 18, 2023 it's even above freezing on the top of Mount Washington right now. https://mountwashington.org/weather/mount-washington-weather/ 1 Link to comment Share on other sites More sharing options...
midatlanticweather Posted December 18, 2023 Share Posted December 18, 2023 A little over an inch for Purcellville. Breezy and my Christmas lights have taken a hit. One strand so far, but that is over 1000 lights. Link to comment Share on other sites More sharing options...
nj2va Posted December 18, 2023 Share Posted December 18, 2023 Heavy rain, local PWS are all over the place but seems to be about 2”. Link to comment Share on other sites More sharing options...
SnowtoRain Posted December 18, 2023 Share Posted December 18, 2023 1.69" Link to comment Share on other sites More sharing options...
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