wxmeddler Posted June 12, 2014 Author Share Posted June 12, 2014 Pretty sure I have figured out what is askew at DCA. lol. ASOS/AWOS do not measure humidity, they measure Temperature, Dew Point and Pressure. RH is derived by calculation. Oh and btw, nothing is wrong with DCA. Link to comment Share on other sites More sharing options...
WxUSAF Posted June 12, 2014 Share Posted June 12, 2014 -10/10 Link to comment Share on other sites More sharing options...
Sparky Posted June 12, 2014 Share Posted June 12, 2014 My new grass is loving the last two days. Link to comment Share on other sites More sharing options...
GramaxRefugee Posted June 12, 2014 Share Posted June 12, 2014 Looks like Mr. Tenman is correct: http://forecast.weather.gov/obslocal.php?warnzone=VAZ054&local_place=Fort%20Myer%20VA&zoneid=EDT&offset=14400 editing a lot.....do I know how to attach photo/screen shot? apparently not. (Getting there) Link to comment Share on other sites More sharing options...
WVclimo Posted June 13, 2014 Share Posted June 13, 2014 Another 0.76" from this afternoon's showers. 4.37" total the past 24 hours. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted June 13, 2014 Share Posted June 13, 2014 Some pretty loltastic "analysis" from Tenman. Link to comment Share on other sites More sharing options...
WVclimo Posted June 13, 2014 Share Posted June 13, 2014 Some pretty major flooding occurring across the river from me in Clear Spring, MD http://www.your4state.com/story/d/story/parts-of-clear-spring-underwater-in-flash-flood/14073/YdV3ZJVdYketGGrgK-n1ag Link to comment Share on other sites More sharing options...
mitchnick Posted June 13, 2014 Share Posted June 13, 2014 talk about unimpressive........BWI's qpf http://w1.weather.gov/data/obhistory/KBWI.html I'll have to keep this in mind this winter when BWI will surely miss the qpf jackpot Link to comment Share on other sites More sharing options...
MN Transplant Posted June 13, 2014 Share Posted June 13, 2014 I'm not going to rag on Tenman here. He's not wrong on the RH thing, I've seen it too. So, he has spotted interesting data and come up with a hypothesis - the DCA temp or DP sensor is faulty. The immediate problem with this is that the hypothesis is not immediately testable, at least not by any of us. So, one method would be to rule out other competing hypotheses. So, what could be alternative factors. If we presume that the DP is fine, that means the temp is high. So, UHI or other geographic factors come in (river). Maybe this makes sense, Quantico is reading low also. If the temp is ok, what about the DP. Artificial drying from the local built environment? Plenty to chew on, but he needs way more data to come up with something solid. Link to comment Share on other sites More sharing options...
yoda Posted June 13, 2014 Share Posted June 13, 2014 That pic of Rte 7 flooded in Leesburg was wow https://twitter.com/hoki_meg/status/477226439490547713/photo/1 Link to comment Share on other sites More sharing options...
WEATHER53 Posted June 13, 2014 Share Posted June 13, 2014 DCA doing exactly what I posted. Look at all the other obs right now just aftermidnight. Conditions same, winds same, all the other stations almsot at dewpoint, DCA much bigger spread. Why? Time after time. Why? Link to comment Share on other sites More sharing options...
WEATHER53 Posted June 13, 2014 Share Posted June 13, 2014 MN made good comments and you can throw the "body of water" part of it out because Annapolis is on bigger water and does not have the same issue. Link to comment Share on other sites More sharing options...
WVclimo Posted June 13, 2014 Share Posted June 13, 2014 The images of the flash flooding coming out of the Cumberland area this evening are unlike anything I saw growing up there. Even Agnes in 1972 didn't have water in places I am seeing it tonight. This is the street my mom lives on: Link to comment Share on other sites More sharing options...
aldie 22 Posted June 13, 2014 Share Posted June 13, 2014 If this area gets another dumping today it's gonna be ugly in spots. Goose creek is busting...traffic was silly yesterday. This is the wettest into June I can remember. I'm usually in full it's dry and drought talk by now. Hope it means something good for winter Link to comment Share on other sites More sharing options...
MN Transplant Posted June 13, 2014 Share Posted June 13, 2014 MN made good comments and you can throw the "body of water" part of it out because Annapolis is on bigger water and does not have the same issue. Need more data points. I looked this morning and while all of the stations were 94-100%, DCA, Quantico and Annapolis were all 90% or below. Quantico was the lowest. Link to comment Share on other sites More sharing options...
Disc Posted June 13, 2014 Share Posted June 13, 2014 Only a little over 1.25" of rain this month. Pretty dry compared to what's going on north of here. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted June 13, 2014 Share Posted June 13, 2014 The images of the flash flooding coming out of the Cumberland area this evening are unlike anything I saw growing up there. Even Agnes in 1972 didn't have water in places I am seeing it tonight. This is the street my mom lives on: That is absolutely amazing. Where's Wes at this stuff is right up his alley. Link to comment Share on other sites More sharing options...
NaoPos Posted June 13, 2014 Share Posted June 13, 2014 The images of the flash flooding coming out of the Cumberland area this evening are unlike anything I saw growing up there. Even Agnes in 1972 didn't have water in places I am seeing it tonight. This is the street my mom lives on: image.jpg Hopefully those were parked cars that got swallowed by the flood waters. If they are in there bc people thought they could drive through, then that's awful. Link to comment Share on other sites More sharing options...
mappy Posted June 13, 2014 Share Posted June 13, 2014 Another .7" since midnight, 3.4" the last few days, almost 4.5" this month Link to comment Share on other sites More sharing options...
Ian Posted June 13, 2014 Share Posted June 13, 2014 The images of the flash flooding coming out of the Cumberland area this evening are unlike anything I saw growing up there. Even Agnes in 1972 didn't have water in places I am seeing it tonight. This is the street my mom lives on: image.jpg Hard to predict but we might be setting up for a big area wide flood event at this rate. If we get some tropical stuff in here and it stays wet beforehand could be messy. Link to comment Share on other sites More sharing options...
H2O Posted June 13, 2014 Share Posted June 13, 2014 Hard to predict but we might be setting up for a big area wide flood event at this rate. If we get some tropical stuff in here and it stays wet beforehand could be messy. could be. If the tropics cooperate we might not see much of a dry spell this summer Link to comment Share on other sites More sharing options...
Bob Chill Posted June 13, 2014 Share Posted June 13, 2014 Hard to predict but we might be setting up for a big area wide flood event at this rate. If we get some tropical stuff in here and it stays wet beforehand could be messy. We are certainly primed at the very least. A 2 day remnant event would cause serious problems. I'm getting a little water coming into my foundation for the first time in my house. I've been here 12 years. Luckily it's in an unfinished part of my basement and localized to a very small area. Still makes me uncomfortable though and I'm sick of rain. My pepper plants are going to have a crappy harvest if this keeps up too. Link to comment Share on other sites More sharing options...
aldie 22 Posted June 13, 2014 Share Posted June 13, 2014 Some stuff firing up around here Link to comment Share on other sites More sharing options...
MN Transplant Posted June 13, 2014 Share Posted June 13, 2014 Looks like it is going to get nasty warm/humid next week. Question is whether it gets beaten down by Thursday (Euro) or sticks around (GFS). Link to comment Share on other sites More sharing options...
aldie 22 Posted June 13, 2014 Share Posted June 13, 2014 There's a little cell to the sw of here heading this way...goose creek just went burp Link to comment Share on other sites More sharing options...
Ian Posted June 13, 2014 Share Posted June 13, 2014 We are certainly primed at the very least. A 2 day remnant event would cause serious problems. I'm getting a little water coming into my foundation for the first time in my house. I've been here 12 years. Luckily it's in an unfinished part of my basement and localized to a very small area. Still makes me uncomfortable though and I'm sick of rain. My pepper plants are going to have a crappy harvest if this keeps up too. Good news is it shouldn't be a huge tropical year though I'd bet even in El Nino years we get some remnants pretty often. We're in a good spot for that overall. Of course at this rate we don't need much help. Weird to go into this time of year with such a surplus. Usually we're starting to Leesburg drought around now. Link to comment Share on other sites More sharing options...
yoda Posted June 13, 2014 Share Posted June 13, 2014 Looks like it is going to get nasty warm/humid next week. Question is whether it gets beaten down by Thursday (Euro) or sticks around (GFS). Looks like maybe some severe next week to break the heat some Wed-Thur? LWX AFD seemed to hint at it Link to comment Share on other sites More sharing options...
mattie g Posted June 13, 2014 Share Posted June 13, 2014 Looks like maybe some severe next week to break the heat some Wed-Thur? LWX AFD seemed to hint at it Good luck with that. We might get some storms, but it'll probably be heavy rain with a few gusts to 20. Link to comment Share on other sites More sharing options...
aldie 22 Posted June 13, 2014 Share Posted June 13, 2014 Pouring Link to comment Share on other sites More sharing options...
aldie 22 Posted June 13, 2014 Share Posted June 13, 2014 Simply deluging Link to comment Share on other sites More sharing options...
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