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Severe Thunderstorm Warning DCC001-MDC003-031-033-272145- /O.NEW.KLWX.SV.W.0148.200627T2100Z-200627T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 500 PM EDT Sat Jun 27 2020 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... The northeastern District of Columbia... West central Anne Arundel County in central Maryland... Southeastern Montgomery County in central Maryland... Northern Prince Georges County in central Maryland... * Until 545 PM EDT. * At 459 PM EDT, severe thunderstorms were located along a line extending from near Goddard to North Chevy Chase, moving east at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Bethesda, Bowie, College Park, Crofton, Greenbelt, Langley Park, Beltsville, Bladensburg, University of Maryland, Fedex Field, Gallaudet University, Fort Totten, RFK Stadium, Landover, Hyattsville, Takoma Park, East Riverdale, Adelphi, Kemp Mill and New Carrollton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3894 7657 3888 7696 3901 7715 3905 7675 TIME...MOT...LOC 2059Z 281DEG 18KT 3901 7681 3900 7708 HAIL...1.00IN WIND...60MPH

FFW up for parts of DC/Montgomery/PG counties till 745pm BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Baltimore MD/Washington DC 457 PM EDT Sat Jun 27 2020 The National Weather Service in Sterling Virginia has issued a * Flash Flood Warning for... The north central District of Columbia... Southeastern Montgomery County in central Maryland... Northwestern Prince Georges County in central Maryland... * Until 745 PM EDT. * At 451 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the area. Up to one inch of rain has already fallen and additional rainfall amounts around 1 inch are expected within the next hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Heavy rain producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that may experience flooding include... Bethesda... College Park... Greenbelt... Langley Park... Beltsville... University of Maryland... Potomac... North Bethesda... Hyattsville... White Oak... Takoma Park... Adelphi... Kemp Mill... Chevy Chase... North Kensington... South Kensington... Riverdale Park... Forest Glen... Hillandale... Martin`s Additions... PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3896 7694 3895 7705 3899 7715 3903 7716 3904 7707 3903 7688 3899 7687 FLASH FLOOD...RADAR INDICATED FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

SPC Day 1 0600 OTLK has N MD in SLGT including Baltimore metro... SLGT risk extends southward into C MD and extreme N VA... MRGL risk as far south as EZF 5% hail and 15% wind in SLGT... 5% hail and 5% wind in MRGL... 2% TOR for BWI to Westminster and NE MD

Pretty active day per the LWX LSR summary yesterday for a MRGL risk of severe PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1110 PM EDT FRI JUN 26 2020 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0348 PM TSTM WND DMG 2 W MARTINSBURG 39.46N 78.01W 06/25/2020 BERKELEY WV 911 CALL CENTER TREE DOWN NEAR INTERSECTION OF TUSCARORA PIKE AND IROQUOIS TRAIL. 0351 PM TSTM WND DMG 1 NNW MARTINSBURG 39.47N 77.98W 06/25/2020 BERKELEY WV 911 CALL CENTER SEVERAL TREES DOWN BLOCKING ROADS IN THE MARTINSBURG AND HEDGESVILLE AREA. 0356 PM HAIL 2 NNW MARTINSBURG ARPT 39.43N 77.99W 06/25/2020 M0.75 INCH BERKELEY WV TRAINED SPOTTER 0358 PM HAIL 2 SSE MARTINSBURG 39.44N 77.96W 06/25/2020 E0.75 INCH BERKELEY WV TRAINED SPOTTER PEA TO DIME SIZE HAIL AND ESTIMATED 45-50 MPH WINDS 0404 PM HAIL 2 E MARTINSBURG 39.46N 77.94W 06/25/2020 M0.75 INCH BERKELEY WV NWS EMPLOYEE 0412 PM TSTM WND DMG 2 N SHEPHERDSTOWN 39.47N 77.81W 06/25/2020 JEFFERSON WV TRAINED SPOTTER SEVERAL LIMBS DOWN THAT WERE ABOUT 3-4" IN DIAMETER NEAR SHEPHERDSTOWN. 0507 PM HAIL 1 SE CHARLES TOWN 39.28N 77.85W 06/25/2020 M0.75 INCH JEFFERSON WV TRAINED SPOTTER 0519 PM HAIL 3 SSE MILLVILLE 39.26N 77.76W 06/25/2020 E0.75 INCH LOUDOUN VA AMATEUR RADIO 0519 PM HAIL 2 SE JEFFERSON 39.34N 77.51W 06/25/2020 M0.75 INCH FREDERICK MD TRAINED SPOTTER 0528 PM TSTM WND DMG 2 E PARK MILLS 39.30N 77.38W 06/25/2020 FREDERICK MD 911 CALL CENTER POWERLINES DOWN IN 8300 BLOCK OF PETERS ROAD. 0528 PM TSTM WND DMG 4 ESE MILLVILLE 39.26N 77.73W 06/25/2020 LOUDOUN VA 911 CALL CENTER SEVERAL TREES BLOWN DOWN ALONG HARPERS FERRY ROAD AND WHITE ROCK ROAD NEAR NEERSVILLE. 0530 PM TSTM WND DMG 3 ENE PARK MILLS 39.32N 77.36W 06/25/2020 FREDERICK MD 911 CALL CENTER TREE DOWN ON 3000 BLOCK OF THURSTON ROAD. 0537 PM TSTM WND DMG 1 NNW LEESBURG 39.12N 77.57W 06/25/2020 LOUDOUN VA EMERGENCY MNGR A SMALL PART OF THE ROOF OF IDA LEE PARK RECREATION CENTER WAS PEELED OFF. TREE DAMAGE IN THE AREA, INCLUDING ON VA-7 HARRY BYRD HIGHWAY NEAR BERLIN TURNPIKE. 0548 PM TSTM WND DMG PARK MILLS 39.30N 77.41W 06/25/2020 FREDERICK MD 911 CALL CENTER SEVERAL TREES DOWN IN THE PARK MILLS AREA. 0551 PM TSTM WND DMG GAITHERSBURG 39.14N 77.22W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR MULTIPLE TREES AND WIRES DOWN IN 19900 BLOCK OF BEALLSVILLE ROAD. 0553 PM TSTM WND DMG 1 SE CLARKSBURG 39.23N 77.27W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR TREE DOWN BLOCKING NORTHBOUND LANE OF MD 355 AT SHAWNEE LANE. 0604 PM TSTM WND DMG 1 NNW GERMANTOWN 39.20N 77.27W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR TREE DOWN ON HOUSE IN 12800 BLOCK OF DUCK POND DRIVE. 0605 PM TSTM WND GST 2 N GERMANTOWN 39.20N 77.26W 06/25/2020 M68 MPH MONTGOMERY MD MESONET 0608 PM TSTM WND DMG 3 SSE DAMASCUS 39.24N 77.18W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR TREES AND WIRES DOWN BLOCKING THE INTERSECTION OF WOODFIELD ROAD AND WATKINS ROAD. 0612 PM TSTM WND DMG GAITHERSBURG 39.14N 77.22W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR MULTIPLE REPORTS OF TREES AND WIRES DOWN THROUGHOUT THE CITY OF GAITHERSBURG. 0615 PM TSTM WND GST GAITHERSBURG 39.14N 77.22W 06/25/2020 M70 MPH MONTGOMERY MD MESONET 0615 PM TSTM WND DMG 1 W ROCKVILLE 39.08N 77.16W 06/25/2020 MONTGOMERY MD TRAINED SPOTTER LARGE TREE UPROOTED IN 200 BLOCK OF AUTUMN WIND WAY. 0619 PM TSTM WND DMG 2 ENE POTOMAC 39.04N 77.16W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR WIRES AND TREE BRANCHES DOWN NEAR INTERSECTION OF SEVEN LOCKS ROAD AND TUCKERMAN LANE. 0619 PM TSTM WND DMG ROCKVILLE 39.08N 77.15W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR MULTIPLE REPORTS OF TREES DOWN THROUGHOUT THE CITY OF ROCKVILLE. 0625 PM TSTM WND DMG LANGLEY 38.94N 77.16W 06/25/2020 FAIRFAX VA DEPT OF HIGHWAYS TREE AND BRANCHES DOWN IN THE AREA OF VA-123 DOLLEY MADISON BOULEVARD NEAR BALLANTRAE LANE. 0630 PM TSTM WND DMG 3 N ROCKVILLE 39.13N 77.14W 06/25/2020 MONTGOMERY MD TRAINED SPOTTER TREE DOWN ON BEECH DRIVE NEAR NEEDWOOD DRIVE 0636 PM TSTM WND DMG 1 E BETHESDA 38.99N 77.11W 06/25/2020 MONTGOMERY MD FIRE DEPT/RESCUE MULTIPLE TREES UPROOTED, WITH ROADS CLOSED AND DAMAGE TO SEVERAL HOMES IN THE BETHESDA BATTERY PARK NEIGHBORHOOD. 0638 PM HAIL BETHESDA 38.99N 77.12W 06/25/2020 E1.00 INCH MONTGOMERY MD PUBLIC QUARTER SIZE HAIL IN BETHESDA. 0639 PM TSTM WND DMG 1 N SOMERSET 38.97N 77.09W 06/25/2020 MONTGOMERY MD EMERGENCY MNGR TREE BRANCHES AND WIRES DOWN IN 4920 BLOCK OF CHEVY CHASE BLVD. 0644 PM TSTM WND DMG 2 ESE SOMERSET 38.96N 77.07W 06/25/2020 DISTRICT OF COLUMB DC PUBLIC TREES DOWN ON 36TH STREET NW BETWEEN GARRISON AND NEVADA AVE NW, FESSENDEN STREET NW BETWEEN 36TH AND 34TH STREET, AND LINNEAN TERAACE BETWEEN 33RD STREET AND LINNEAN AVE NW. 0645 PM TSTM WND DMG 1 ESE SOMERSET 38.96N 77.07W 06/25/2020 DISTRICT OF COLUMB DC TRAINED SPOTTER TREE DOWN ON HOME IN 3700 BLOCK OF CHESAPEAKE STREET NW. 0646 PM TSTM WND DMG NASONS 38.26N 78.03W 06/25/2020 ORANGE VA 911 CALL CENTER MULTIPLE REPORTS OF TREES DOWN BETWEEN ORANGE AND UNIONVILLE 0655 PM TSTM WND GST ORANGE COUNTY ARPT 38.25N 78.05W 06/25/2020 M59 MPH ORANGE VA AWOS 0656 PM TSTM WND DMG 2 NNW LAHORE 38.22N 77.98W 06/25/2020 ORANGE VA 911 CALL CENTER MULTIPLE TREES REPORTED DOWN NEAR KENDALL AND LAHORE ROADS 0705 PM TSTM WND DMG 2 W THORNHILL 38.16N 78.00W 06/25/2020 ORANGE VA 911 CALL CENTER MULTIPLE TREES DOWN NEAR MONROVIA AND MARQUIS ROADS 0706 PM MARINE TSTM WIND 7 SSE SAINT GEORGE ISLA 38.01N 76.45W 06/25/2020 M39 MPH ANZ537 MD BUOY 0717 PM TSTM WND DMG 2 E BELMONT 38.16N 77.82W 06/25/2020 SPOTSYLVANIA VA 911 CALL CENTER MULTIPLE TREES REPORTED DOWN IN THE WESTERN PART OF SPOTSYLVANIA 0734 PM TSTM WND DMG WARRENTON 38.72N 77.80W 06/25/2020 FAUQUIER VA 911 CALL CENTER MANY REPORTS OF TREES DOWN IN AND NEAR WARRENTON 0734 PM TSTM WND DMG 1 NNE UPPER MARLBORO 38.83N 76.75W 06/25/2020 PRINCE GEORGES MD 911 CALL CENTER TREE DOWN ON LARGO ROAD NEAR UPPER MARLBORO. 0738 PM TSTM WND DMG 2 W PARTLOW 38.04N 77.68W 06/25/2020 SPOTSYLVANIA VA PUBLIC MULTIPLE TREES DOWNED/SNAPPED IN THE 10000 BLOCK OF HUMMINGBIRD DR. NEAR PARTLOW, VA. 0743 PM TSTM WND DMG PARTLOW 38.04N 77.64W 06/25/2020 SPOTSYLVANIA VA 911 CALL CENTER MULTIPLE REPORTS OF TREES DOWNED IN THE PARTLOW AREA 0743 PM HAIL 2 W PARTLOW 38.04N 77.68W 06/25/2020 M1.50 INCH SPOTSYLVANIA VA PUBLIC 0832 PM TSTM WND DMG 3 SW TRIANGLE 38.52N 77.36W 06/25/2020 PRINCE WILLIAM VA 911 CALL CENTER LARGE TREE DOWN BLOCKING ALL LANES OF US 1 NEAR RUSSELL ROAD 0839 PM TSTM WND GST QUANTICO MARINE CORP 38.51N 77.30W 06/25/2020 M63 MPH PRINCE WILLIAM VA ASOS 0859 PM HAIL 2 E IRONSIDES 38.49N 77.13W 06/25/2020 M1.00 INCH CHARLES MD TRAINED SPOTTER

Guess we shall see... POPS actually went up to 40 percent for DCA on the 730 update from 0 percent at the 430 one. Will be isolated as you state most likely, but if any storm can get going... good chance of damaging wind gusts

SLGT risk was moved south in the 1730z update to include all of northern into central MD into extreme N VA for wind

Don't sound too enthused in the disco though lol

New day 2 morning SPC OTLK has SW CT and LI now in SLGT... mainly for wind (15%)... hail is at 5 percent and there is a small 2 percent TOR for SE NY into E PA and NW NJ

I thought they were on MASN2?

Nice cool evening in late June to have the windows open

And i guess this is in response to the STQ above? It's named FWS (Suppression Forecast) and was issued at 10:25pm

@high risk @WxUSAF @MN Transplant or any other person who knows... what is an STQ? It says its a spot forecast request... it appeared on the drop-down menu at 10:21pm. What are the basically used for? https://www.weather.gov/lwx/ Click text product selector beneath the radar image... when i click on it this pops up

Pretty cool to see on radarscope... from W DC into N VA

70mph wind gust reported by mesonet in Gaithersburg, MD 68mph wind gust reported by mesonet 2 N Germantown, MD

Kinda surprised that those two storms out west are not severe warned... have pretty decent hail cores on them per radarscope

So no sprinklers this evening?

Maybe a lil something this afternoon from DC south? Morning AFD from LWX seems to think so:

Day 3 disco

New Day 3 from SPC heard about this thread and stopped the SLGT risk right at the border for SNE SLGT risk is in SE NY... but as soon as the border to MA and CT came, straight to MRGL to troll @weatherwiz

Didn't know that the Euro model had this... bolded part is what I'm talking about... from this afternoon's AFD from LWX:

Tropical Storm Dolly Discussion Number 6 NWS National Hurricane Center Miami FL AL042020 500 PM AST Tue Jun 23 2020 Dolly's structure has continued to improve somewhat during the day with convective banding now extending around the eastern and northern side of the circulation. While water vapor imagery indicates that an upper-level low is still in the vicinity of Dolly, that feature is displaced from the cyclone a bit, with some anticyclonic outflow noted in the cirrus canopy. This structure further supports the analysis of Dolly's transition to a tropical storm. For intensity, there is a wide range among satellite estimates, with TAFB and SAB ranging from 25-35 kt and UW-CIMSS ADT and SATCON estimates between 45-50 kt. The initial intensity will remain 40 kt on this advisory, matching what was shown by the earlier scatterometer data. Dolly continues to move east-northeastward with an initial motion of 060/10 kt. Strengthening mid-latitude southwesterly flow is expected to cause Dolly to turn northeastward and begin accelerating tonight into Wednesday, and the track guidance is in good agreement on the future path and speed of the storm. Dolly's future track will take it over much colder waters and into a higher-shear environment over the next day or so, which should cause the cyclone to degenerate into a remnant low on Wednesday. Dissipation is still shown at 48 hours, but global models fields indicate that the circulation could open up before then as the system nears the southeastern tip of Newfoundland. FORECAST POSITIONS AND MAX WINDS INIT 23/2100Z 40.1N 61.1W 40 KT 45 MPH 12H 24/0600Z 41.2N 59.4W 35 KT 40 MPH 24H 24/1800Z 43.1N 56.9W 30 KT 35 MPH...POST-TROP/REMNT LOW 36H 25/0600Z 45.0N 53.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 25/1800Z...DISSIPATED $$ Forecaster Berg

We got Dolly earlier this afternoon BULLETIN Tropical Storm Dolly Advisory Number 6 NWS National Hurricane Center Miami FL AL042020 500 PM AST Tue Jun 23 2020 ...DOLLY BEGINNING TO MOVE AWAY FROM THE GULF STREAM CURRENT... ...FORECAST TO BECOME A REMNANT LOW ON WEDNESDAY... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...40.1N 61.1W ABOUT 335 MI...540 KM SSE OF HALIFAX NOVA SCOTIA ABOUT 605 MI...975 KM SW OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...ENE OR 60 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 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 Dolly was located near latitude 40.1 North, longitude 61.1 West. Dolly is moving toward the east-northeast near 12 mph (19 km/h). A turn toward the northeast with an increase in forward speed is expected tonight and on Wednesday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Weakening is forecast as Dolly moves over colder waters, and the system is expected to become post-tropical on Wednesday. The remnant low should then dissipate by early Thursday. Tropical-storm-force winds extend outward up to 70 miles (110 km) to the south of the center. The estimated minimum central pressure is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Berg

I can see distant lightning from the storms in C MD looks like from here in Springfield, VA It's likely either the storms out north of Leesburg that are in MD or the storms west of Middleburg in extreme western Loudoun County

Gone in the next 60 to 72 hours... still a slight chance to get named Subtropical Depression Four Discussion Number 2 NWS National Hurricane Center Miami FL AL042020 1100 PM AST Mon Jun 22 2020 The cyclone has little or no deep convection near its center, and remains situated beneath an upper-level low. Therefore, the system is still a subtropical cyclone and the intensity is kept at 30 kt in agreement with the most recent satellite classification from TAFB. The 30-kt intensity was also supported by recent scatterometer data. There is a small window of opportunity for strengthening since the system should remain over a relatively warm Gulf Stream eddy for 12 hours or so. Thereafter, a weakening trend is expected to begin and the system should make the transition to an extratropical cyclone over cooler waters in 36 hours or sooner. The global models indicate that the system should open up into a trough in a couple of days so the official forecast shows dissipation by 72 hours. It would not be surprising if the system meets its demise sooner than that. The official intensity forecast is similar to the latest decay-SHIPS guidance. The motion continues east-northeastward, or 060/9 kt. Over the next few days, the cyclone should remain embedded in a branch of west-southwesterlies that is split off from the main mid-latitude flow. There is good agreement in the track guidance that the system will turn northeastward with some acceleration during the next 48-60 hours. The official track forecast is similar to the previous one, and is also close to the dynamical model consensus. FORECAST POSITIONS AND MAX WINDS INIT 23/0300Z 38.7N 64.6W 30 KT 35 MPH 12H 23/1200Z 39.2N 62.9W 35 KT 40 MPH 24H 24/0000Z 40.3N 60.6W 30 KT 35 MPH 36H 24/1200Z 42.0N 58.5W 30 KT 35 MPH...POST-TROP/EXTRATROP 48H 25/0000Z 44.0N 55.5W 25 KT 30 MPH...POST-TROP/EXTRATROP 60H 25/1200Z 46.0N 52.0W 25 KT 30 MPH...POST-TROP/EXTRATROP 72H 26/0000Z...DISSIPATED $$

Not much change at the 11pm advisory BULLETIN Subtropical Depression Four Advisory Number 2 NWS National Hurricane Center Miami FL AL042020 1100 PM AST Mon Jun 22 2020 ...SUBTROPICAL DEPRESSION MOVING EAST-NORTHEASTWARD AWAY FROM LAND... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...38.7N 64.6W ABOUT 335 MI...535 KM ESE OF NANTUCKET MASSACHUSETTS ABOUT 410 MI...660 KM S OF HALIFAX NOVA SCOTIA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...ENE OR 60 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Subtropical Depression Four was located near latitude 38.7 North, longitude 64.6 West. The depression is moving toward the east-northeast near 10 mph (17 km/h) and a turn toward the northeast with some increase in forward speed is expected during the next 48 hours. Maximum sustained winds remain near 35 mph (55 km/h) with higher gusts. Some slight strengthening is possible early Tuesday, and the subtropical depression could briefly become a subtropical storm. Slow weakening is expected to begin by Tuesday afternoon or evening. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Pasch