Eskimo Joe Posted July 28, 2017 Share Posted July 28, 2017 Second stationary pop up over Bolivar and Harper's Ferry. Link to comment Share on other sites More sharing options...
H2O Posted July 28, 2017 Share Posted July 28, 2017 and raining buckets yet again here at work. Link to comment Share on other sites More sharing options...
mappy Posted July 28, 2017 Share Posted July 28, 2017 yeah those early cells are barely moving. Link to comment Share on other sites More sharing options...
Bob Chill Posted July 28, 2017 Share Posted July 28, 2017 There must be some sort of convergence going on near the 95 corridor. Easterly flow at the surface seems to be triggering the expansion. Very slow moving heavy rain seems on tap for the next few hours for some areas (like my yard.lol) Link to comment Share on other sites More sharing options...
Kmlwx Posted July 28, 2017 Share Posted July 28, 2017 Awesome being in the jackpot zone for the time being. Rare experience for me. I hope my office washes away down the Potomac. Link to comment Share on other sites More sharing options...
yoda Posted July 28, 2017 Share Posted July 28, 2017 12z NAM through 18z SAT jackpots N MD just west of BWI and WNW of CHO with 6-7" Link to comment Share on other sites More sharing options...
Bob Chill Posted July 28, 2017 Share Posted July 28, 2017 3k nam is spitting out some impressive totals again. Especially in central MD. Very heavy rain on the backside tonight. Link to comment Share on other sites More sharing options...
MN Transplant Posted July 28, 2017 Share Posted July 28, 2017 Over 2" already near Fairfax Inova. Link to comment Share on other sites More sharing options...
H2O Posted July 28, 2017 Share Posted July 28, 2017 1 minute ago, MN Transplant said: Over 2" already near Fairfax Inova. Hi. Just west of there. We are floating Link to comment Share on other sites More sharing options...
BTRWx Posted July 28, 2017 Share Posted July 28, 2017 4 minutes ago, MN Transplant said: Over 2" already near Fairfax Inova. That's amazing! I'm 7 miles from there and have not had a drop. Link to comment Share on other sites More sharing options...
AmericanWxFreak Posted July 28, 2017 Share Posted July 28, 2017 Link to comment Share on other sites More sharing options...
mappy Posted July 28, 2017 Share Posted July 28, 2017 ^^ yes that is what i want to see! Link to comment Share on other sites More sharing options...
mattie g Posted July 28, 2017 Share Posted July 28, 2017 9 minutes ago, MN Transplant said: Over 2" already near Fairfax Inova. Good. Fringed. Don't need that S here. Link to comment Share on other sites More sharing options...
MN Transplant Posted July 28, 2017 Share Posted July 28, 2017 7 minutes ago, H2O said: Hi. Just west of there. We are floating Flash Flood Warning is out now. Could you shove it a bit to your NE? Link to comment Share on other sites More sharing options...
mappy Posted July 28, 2017 Share Posted July 28, 2017 yeah boyyy, I think I will keep the party on for tomorrow. Hopefully GFS shows similar output for my area Link to comment Share on other sites More sharing options...
Scraff Posted July 28, 2017 Share Posted July 28, 2017 16 minutes ago, Bob Chill said: 3k nam is spitting out some impressive totals again. Especially in central MD. Very heavy rain on the backside tonight. Bringing back the MoCo/HoCo death band? Link to comment Share on other sites More sharing options...
yoda Posted July 28, 2017 Share Posted July 28, 2017 @mappyDoesn't the 3KM NAM show like 2-4" for you? Or am I missing where you live? Link to comment Share on other sites More sharing options...
mappy Posted July 28, 2017 Share Posted July 28, 2017 1 minute ago, yoda said: @mappyDoesn't the 3KM NAM show like 2-4" for you? Or am I missing where you live? Yup, but most of that falls tonight. I'm more concerned about rain actually falling between 1-4p tomorrow. I can deal with a damp, muddy yard. It's a party with a bunch of toddlers, they can get messy. I just don't want it to be pouring. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 28, 2017 Share Posted July 28, 2017 Pouring in Gaithersburg. DCA has a Td of 75 so these will be efficient rain producers. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 28, 2017 Share Posted July 28, 2017 Meso'd hope we jackpot: http://www.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=582&yr=2017 Link to comment Share on other sites More sharing options...
BlizzardNole Posted July 28, 2017 Share Posted July 28, 2017 This event is going to get ugly for places getting these slow, very heavy rainers right now. Link to comment Share on other sites More sharing options...
ErinInTheSky Posted July 28, 2017 Share Posted July 28, 2017 Coming down incredibly hard here in Gaithersburg. Link to comment Share on other sites More sharing options...
BTRWx Posted July 28, 2017 Share Posted July 28, 2017 1 minute ago, Eskimo Joe said: Pouring in Gaithersburg. DCA has a Td of 75 so these will be efficient rain producers. Assuming they get to dca. lol Link to comment Share on other sites More sharing options...
Bob Chill Posted July 28, 2017 Share Posted July 28, 2017 Some CG and rumbles with this cell. Good times coming early. Link to comment Share on other sites More sharing options...
Stormpc Posted July 28, 2017 Share Posted July 28, 2017 I HATE you all. Cloudy, 80/73. .0000infinity Link to comment Share on other sites More sharing options...
ErinInTheSky Posted July 28, 2017 Share Posted July 28, 2017 Just got the SMS flash flood warning alert. Rain is coming down the way it did when I was living in the Baton Rouge flood right now. Link to comment Share on other sites More sharing options...
adelphi_sky Posted July 28, 2017 Share Posted July 28, 2017 1 minute ago, Stormpc said: I HATE you all. Cloudy, 80/73. .0000infinity Don't hate me. Nice rain hole shaping up for my neighborhood. Rain all around but here. Hope it starts soon. Link to comment Share on other sites More sharing options...
ErinInTheSky Posted July 28, 2017 Share Posted July 28, 2017 Torrent of water from drainage rushing down my street. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 28, 2017 Share Posted July 28, 2017 Quote MESOSCALE PRECIPITATION DISCUSSION 0582 NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 1040 AM EDT FRI JUL 28 2017 AREAS AFFECTED...FAR SOUTHERN PA...MD...D.C...NORTHERN VA CONCERNING...HEAVY RAINFALL...FLASH FLOODING LIKELY VALID 281440Z - 282040Z SUMMARY...SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAINFALL RATES ARE EXPECTED TO DEVELOP AND EXPAND IN COVERAGE OVER THE NEXT SEVERAL HOURS. RAINFALL RATES OF UP TO 2.5 INCHES/HR ARE EXPECTED...AND FLASH FLOODING WILL GRADUALLY BECOME LIKELY. DISCUSSION...THE LATEST EXPERIMENTAL GOES-16 6.9 MICRON/WV AND RGB/AIRMASS IMAGERY SHOWS A SIGNIFICANT SHORTWAVE TROUGH RAPIDLY AMPLIFYING ACROSS THE LOWER GREAT LAKES REGION...WITH A CLOSED 500 MB CENTER ALREADY DIGGING SOUTHEAST ACROSS NORTHERN LOWER MI. MEANWHILE...UPSTREAM OVER SOUTHERN WI...THERE IS A SIGNIFICANT AMOUNT DRYING/DARKENING SEEN IN THE WV IMAGERY WHICH IS CORRESPONDING TO A 90+KT 250 MB JET MAX THAT IS DIGGING SOUTHEAST IN TOWARD THE BASE OF THE AMPLIFYING TROUGH. ALL OF THIS ENERGY WILL BE ENCROACHING ON THE MID-ATLANTIC REGION BY EARLY THIS AFTERNOON AND WILL BE INTERACTING WITH MULTIPLE BOUNDARIES/SURFACE CONVERGENCE ZONES INCLUDING A FRONTAL ZONE DRAPED OVER THE UPPER OH VALLEY AND EXTENDING EAST ACROSS THE MASON-DIXON LINE. MEANWHILE...A LEE-SIDE TROUGH IS NOTED EAST OF THE BLUE RIDGE FROM JUST WEST OF BALTIMORE SOUTH TO D.C AND DOWN THROUGH CENTRAL/SOUTHERN VA. A WAVE OF LOW PRESSURE IS NOTED ALONG IT SOUTH OF D.C. ALONG THE POTOMAC RIVER. CONSEQUENTLY THERE ARE MULTIPLE FOCI AT THE SURFACE FOR CONVECTION TO INITIATE AS THE UPSTREAM ENERGY APPROACHES THIS AFTERNOON...AND THIS WILL INCLUDE OROGRAPHIC FORCING OVER THE BLUE RIDGE AND ADJACENT FOOTHILLS. THE AIRMASS OVER THE MID-ATLANTIC ALONG AND SOUTH OF THE FRONT IS VERY MOIST AND BECOMING INCREASINGLY UNSTABLE. PWATS OF GENERALLY 1.75 TO 2.0 INCHES AND MUCAPE VALUES APPROACHING OR LOCALLY EXCEEDING 2000 J/KG ARE IN PLACE. OVER THE NEXT FEW HOURS...STRENGTHENING DPVA AND INCREASINGLY DIVERGENT FLOW ALOFT WILL BE INTERACTING WITH THE FRONT AND WITH THE AIRMASS SOUTH OF IT FOR AN EXPANSION OF CONVECTIVE ACTIVITY. THE AFOREMENTIONED SURFACE BOUNDARIES COUPLED WITH ADDITIONAL DIURNAL HEATING AND OROGRAPHICS WILL ALSO FACILITATE THE INCREASED COVERAGE OF CONVECTION. EXPECT RAINFALL RATES TO BE QUITE INTENSE...WITH RATES AS HIGH AS 2.5 INCHES/HR WITHIN THE STRONGER CONVECTIVE CORES. THIS COUPLED WITH RELATIVELY SLOW CELL MOTION SHOULD FOSTER SOME VERY HEAVY RAINFALL TOTALS THROUGH MID TO LATE AFTERNOON. THE LATEST HRRR/HRRRX GUIDANCE SUPPORT SOME LOCALIZED 3 TO 5 INCH RAINFALL AMOUNTS THROUGH LATE AFTERNOON. THIS WILL LIKELY RESULT IN SOME FLASH FLOODING...WITH A PARTICULAR CONCERN OVER THE HIGHER TERRAIN AND ALSO THE URBANIZED I-95 CORRIDOR FROM BALTIMORE TO D.C. AND NORTHERN VA...ALONG WITH THE ADJACENT SUBURBS. ORRISON ATTN...WFO...AKQ...CTP...LWX...PBZ...PHI... Link to comment Share on other sites More sharing options...
mattb65 Posted July 28, 2017 Share Posted July 28, 2017 I live quite close to sligo creek which is specifically mentioned in the FF warning for MoCo and my house is close to the mini Wheaton/Glenmont jackpot from this initial band. I gave a heads up to my wife who is at home and will report if there is any flooding. When I head home I'll take pics if there is anything significant along sligo creek parkway. Link to comment Share on other sites More sharing options...
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