yoda

Now if you can only get @Eskimo Joe to join in... pretty sure @high risk and @MN Transplant are in

Work at DDC3, Amazon DS in Springfield. Most people know I'm a big weather nerd and the such. Just texted our management team about late tonight into Wednesday night re flood threat and tornado threat. This is my favorite part: Me: So there is a good chance of a few tornadoes tomorrow afternoon into early night time period. Let's say there is a tornado warning issued for our area at 9pm (shift starts around then)... does the floor stop what's going on and all staff/AAs report to the severe weather areas in the building until the warning is over? Them: That's a GREAT question. I am not sure how Amazon handles those items from a global operational perspective. Um... okay? Guess I'll be the one making the calls on the floor to manager about any tornado warnings... guess we'll see what happens lol

Sorry... we don't have any at our station

06z NAM came south with the heavy rain totals... 3 to 7 inches in N VA/DC/MD

Sounds fun... have a good and safe trip!

06z NAM NEST sim radar looks pretty ominous at 22z WED

LWX gung ho for Wednesday severe .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... Wednesday continues to have the potential to be a high impact weather day for our area. In summary, northwestern portions of our forecast area need to prepare for significant rainfall and the threat for flash and river flooding. The southeastern half may see less rain overall, but will have a greater risk of tornadoes, likely during the afternoon and evening. River impacts are discussed in the hydrology section below. Some guidance is indicating the system comes in two pieces. During the morning hours, the heaviest and most widespread rainfall will likely continue to be west of the Blue Ridge in the zone of isentropic ascent/tropical moisture flux. This could serve to allow some additional heating to occur especially over southeastern portions of the area, allowing greater instability to build. The low center will cross our area during the late afternoon and evening, potentially strengthening as it encounters increasing baroclinicity along the stalled front. While models continue to wobble some, and there is definitely some spread in exact solutions, the main stories remain in tact. Precipitable water values will exceed two inches during this time with deep, tropical warm cloud layers. A sharp mid level trough and jet streak to the north will provide additional forcing. Therefore, very high rain rates are possible during this time, which could be especially hazardous to our northwestern counties which will have already had a healthy soaking of rain. Widespread and significant flooding could occur in these areas if the worst case rain totals verify. However, anywhere these rain rates persist for any amount of time could see flash flooding. Meanwhile, low level shear will increase markedly, especially near the low track and frontal zone, but shear will be large across the warm sector. Model forecasts of instability, low level lapse rates, and the shear combine to suggest tornadoes will be a threat in the warm sector. Initial CAM depictions of broken/cellular convection also support this idea. Given the strong winds aloft, storms could also cause damaging wind gusts. At this time, am not sure we are able to mix into the strong wind fields aloft enough to warrant wind advisories, but in general gradient winds will also increase as the low passes. Precipitation will taper off from west to east late Wednesday night into Thursday morning, and clearing should rapidly follow. Timing of departure is still a little uncertain, but most areas should be dry by afternoon. Gusty north winds will continue, and temperatures will remain below normal even where the sun comes out. Lower humidity levels and cold advection will allow for temperatures to dip into the 50s and lower 60s Thursday night, with some potential 40s in the mountains.

Still open in morning disco Excessive Rainfall Discussion NWS Weather Prediction Center College Park MD 429 AM EDT Tue Aug 31 2021 Day 2 Valid 12Z Wed Sep 01 2021 - 12Z Thu Sep 02 2021 ...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL EXTENDING FROM THE PARTS OF THE CENTRAL APPALACHIANS AND MID ATLANTIC REGION INTO SOUTHEAST NEW YORK AND SOUTHERN NEW ENGLAND... ...Central Appalachians/Mid-Atlantic northeast into southeast New York and southern New England... Very heavy rainfall will continue to spread northeastward on Wednesday across portions of the central Appalachians, central/northern Mid-Atlantic region, and up across southeast NY and southern New England as the extratropical low center of Ida makes its way across northern VA, central/eastern MD and southern NJ before then heading offshore to the south of Long Island. Moisture and instability will continue to surge northward around its eastern flank and over a rather strong frontal zone draped across the region. Enhanced moisture convergence, strong frontogenetical and isentropic ascent just north of the front, and focused right-entrance region upper jet dynamics over the region will foster locally several inches of rain, including the potential for some areas to see 4 to 6+ inches totals from the WV/MD Panhandles east/northeast across south-central PA. A fairly broad Moderate Risk area is again highlighted to account for the latest forecast guidance and storm track of Ida. While a High Risk area may ultimately be needed, but too much uncertainty lingers to Ida's exact path at this point to warrant an upgrade now.

SLGT risk for today as well for VA into MD and DC

Lulz... DCA sounding for 21z WED

18z NAM sim reflectivity shows a pretty strong line of storms pushing through as an Ida finale at 00z Thursday

Pretty impressive soundings at KIAD and KDCA based off the image lol... 45 to 50 kts 0-6km shear and nice hodo along with impressive low level shear Same at KEZF and KBWI

Does slightly look like Isabel tbh at first glance lol

Tropical Storm Kate Discussion Number 11 NWS National Hurricane Center Miami FL AL102021 500 PM AST Mon Aug 30 2021 The low-level center of Kate is exposed in visible satellite imagery this afternoon. Its deep convection collapsed late this morning, and the sheared tropical cyclone is now only producing a small area of convection over 60 n mi east of its center. A partial 1321 UTC ASCAT-B pass still showed numerous 30-kt wind vectors in the eastern semicircle, even with little to no active convection. The initial intensity is conservatively lowered to 35 kt for this advisory. The subtropical jet stream across the central Atlantic will continue to impart strong west-northwesterly vertical wind shear on Kate during the next day or so. If the struggling tropical cyclone can survive these hostile conditions, some modest strengthening could occur later this week over warm SSTs of 28 deg C or so. However, the lack of mid-level moisture in the surrounding environment may limit convective development even under these more favorable conditions, and there is no guarantee that Kate will survive that long. In fact, simulated satellite imagery from the GFS and ECMWF suggest that Kate may continue to only produce sporadic bursts of convection over the next couple of days, which jeopardizes its chances of surviving through the week. The official NHC intensity forecast has been adjusted downward based on the latest guidance trends and the uncertainties discussed above. Minor fluctuations in intensity could occur over the next 24-36 h as convective pulsing causes the cyclone's intensity to hover around tropical-storm-force strength. Kate is moving a little faster toward the north, or 355/9 kt, within a weakness in the subtropical ridge. A northward motion is expected to continue through early Tuesday. The subtropical ridge is expected to become reestablished over the central Atlantic Tuesday night into Wednesday, which should turn Kate toward the northwest through midweek. Thereafter, Kate is forecast to accelerate northward or north-northeastward ahead of an approaching deep-layer trough that will move across the western Atlantic late this week. Assuming Kate is still around by day 5, the cyclone is forecast to become absorbed by a larger extratropical low near Atlantic Canada. FORECAST POSITIONS AND MAX WINDS INIT 30/2100Z 22.7N 50.9W 35 KT 40 MPH 12H 31/0600Z 23.7N 50.7W 30 KT 35 MPH 24H 31/1800Z 24.7N 50.7W 30 KT 35 MPH 36H 01/0600Z 25.8N 51.1W 35 KT 40 MPH 48H 01/1800Z 27.0N 52.1W 35 KT 40 MPH 60H 02/0600Z 28.4N 53.5W 40 KT 45 MPH 72H 02/1800Z 30.1N 54.7W 40 KT 45 MPH 96H 03/1800Z 34.5N 55.0W 40 KT 45 MPH 120H 04/1800Z...DISSIPATED $$ Forecaster Reinhart

Tropical Storm Kate Advisory Number 11 NWS National Hurricane Center Miami FL AL102021 500 PM AST Mon Aug 30 2021 ...KATE REMAINS A SHEARED TROPICAL CYCLONE OVER THE OPEN WATERS OF THE CENTRAL ATLANTIC... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...22.7N 50.9W ABOUT 805 MI...1295 KM ENE OF THE LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the center of Tropical Storm Kate was located near latitude 22.7 North, longitude 50.9 West. Kate is moving toward the north near 10 mph (17 km/h), and this motion with a slight decrease in forward speed is expected through early Tuesday. Then, a northwestward motion is forecast through midweek. Maximum sustained winds have decreased to near 40 mph (65 km/h) with higher gusts. Some fluctuations in intensity are forecast during the next couple of days. Some slow strengthening is possible by Thursday. Tropical-storm-force winds extend outward up to 45 miles (75 km) from the center in the eastern semicircle. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Reinhart

@WxWatcher007 I assume that the Hurricane that the 12z Euro shows heading WNW at the end if its run is about to be kicked and recurve back out to sea due to the incoming trough, yes?

12z NAM soundings look nice as well

I'm intrigued for Tuesday night into early Wednesday... MRGL risk for isolated tornadoes and damaging wind gusts

That would mean better chance of severe weather

@psuhoffman is fringed... I think?

My job is done

@EastCoast NPZ Hmmm

National Weather Service Baltimore MD/Washington DC 454 AM EDT Mon Aug 30 2021 DCZ001-MDZ004>006-008-011-013-014-503>508-VAZ038>040-051>054-501-502- 505>507-301700- /O.NEW.KLWX.FF.A.0014.210901T1500Z-210902T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ District of Columbia-Frederick MD-Carroll-Northern Baltimore-Cecil- Southern Baltimore-Prince Georges-Anne Arundel-Northwest Montgomery- Central and Southeast Montgomery-Northwest Howard-Central and Southeast Howard-Northwest Harford-Southeast Harford-Greene-Madison- Rappahannock-Culpeper-Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Northern Fauquier-Southern Fauquier-Western Loudoun-Eastern Loudoun-Northern Virginia Blue Ridge- Including the cities of Elkton, South Gate, Bowie, Arlington, Annapolis, Manassas, Odenton, Westminster, Damascus, Falls Church, Silver Spring, Purcellville, Bethesda, Chantilly, Culpeper, Ballenger Creek, Centreville, Sterling, College Park, Reisterstown, Columbia, Warrenton, Herndon, Alexandria, Severna Park, Greenbelt, Germantown, Leesburg, McLean, Camp Springs, Rockville, Jarrettsville, Frederick, Arnold, Dale City, Big Meadows, Suitland-Silver Hill, Lake Ridge, Gaithersburg, Severn, Reston, Montclair, Baltimore, Madison, Eldersburg, Clinton, Glen Burnie, Ashburn, Ellicott City, Woodbridge, Stanardsville, Washington, Annandale, Franconia, Cockeysville, Lisbon, Laurel, Turnbull, and Aberdeen 454 AM EDT Mon Aug 30 2021 ...FLASH FLOOD WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... The National Weather Service in Sterling Virginia has issued a * Flash Flood Watch for portions of DC, Maryland and Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford and Southern Baltimore. In Virginia, Arlington/Falls Church/Alexandria, Culpeper, Eastern Loudoun, Fairfax, Greene, Madison, Northern Fauquier, Northern Virginia Blue Ridge, Prince William/Manassas/Manassas Park, Rappahannock, Southern Fauquier and Western Loudoun. * From Wednesday morning through Thursday morning. * The remnants of Ida will interact with a stalled front, resulting in a prolonged period of heavy rainfall beginning Wednesday morning and continuing through Wednesday night. Rainfall amounts of 2 to 4 inches are expected, with localized amounts up to 6 inches possible. * This amount of heavy rainfall will not only result in the potential for considerable flash flooding of creeks, small streams, and urban areas, but also the potential for river flooding on the main stem rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Flood Watch National Weather Service Baltimore MD/Washington DC 454 AM EDT Mon Aug 30 2021 MDZ001-003-501-502-VAZ026>031-WVZ050>053-055-501>506-301700- /O.NEW.KLWX.FF.A.0014.210901T0600Z-210902T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Garrett-Washington-Extreme Western Allegany-Central and Eastern Allegany-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant-Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton-Eastern Pendleton- Including the cities of Shepherdstown, Mount Storm, Charles Town, Cumberland, Winchester, Ruddle, Martinsburg, Woodstock, Bayard, Keyser, Luray, Berryville, Harrisonburg, New Market, Shenandoah, Moorefield, Mount Jackson, Front Royal, Antioch, Russelldale, Grantsville, Riverton, Hagerstown, Mountain Lake Park, Frostburg, Franklin, Fort Ashby, Elk Garden, Oak Flat, New Creek, Paw Paw, Sugar Grove, Romney, Brandywine, Headsville, Strasburg, Stanley, Oakland, Ridgeville, and Petersburg 454 AM EDT Mon Aug 30 2021 ...FLASH FLOOD WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE WEDNESDAY NIGHT... The National Weather Service in Sterling Virginia has issued a * Flash Flood Watch for portions of Maryland, Virginia and West Virginia, including the following areas: in Maryland, Central and Eastern Allegany, Extreme Western Allegany, Garrett and Washington. In Virginia, Clarke, Frederick VA, Page, Rockingham, Shenandoah and Warren. In West Virginia, Berkeley, Eastern Grant, Eastern Mineral, Eastern Pendleton, Hampshire, Hardy, Jefferson, Morgan, Western Grant, Western Mineral and Western Pendleton. * From late Tuesday night through late Wednesday night. * The remnants of Ida will interact with a stalled front, resulting in a prolonged period of heavy rainfall beginning late Tuesday night and continuing through Wednesday evening. Rainfall amounts of 2 to 4 inches are expected, with localized amounts up to 6 inches possible. * This amount of heavy rainfall will not only result in the potential for considerable flash flooding of creeks and small streams, but also the potential for river flooding on the main stem rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.