Waarschuwingen, Aylor

Wind

18-7 8:33 p.m. 20:33 – 19-7 1:00 a.m. 01:00

Tornado Watch issued July 18 at 4:33PM EDT until July 18 at 9:00PM EDT by NWS Baltimore MD/Washington DC TORNADO WATCH 495 REMAINS VALID UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 11 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD MONTGOMERY PRINCE GEORGES IN NORTH CENTRAL MARYLAND CARROLL FREDERICK IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD IN SOUTHERN MARYLAND CALVERT THIS INCLUDES THE CITIES OF ABERDEEN, ABINGDON, ANDORA, ANNAPOLIS, APPLETON, ARNOLD, BALLENGER CREEK, BALTIMORE, BARKSDALE, BAY VIEW, BETHESDA, BLAKE, BOHEMIAS MILLS, BOWIE, BOYDS, BRANTWOOD, BROOMES ISLAND, BUCKEYSTOWN, BYNUM, CATONSVILLE, CHESAPEAKE BEACH, CLARKSVILLE, CLINTON, COLLEGE PARK, COLUMBIA, COVE POINT, DRUM POINT, DUNDALK, DUNKIRK, EDGEWOOD, ELDERSBURG, ESSEX, FELLS POINT, FOUR CORNERS, FREDERICK, GAITHERSBURG, GAMBER, GERMANTOWN, GLEN BURNIE, GLENMONT, GREENBELT, HARFORD FURNACE, HICKORY, HISTORIC ELLICOTT CITY, LONG BEACH, MAGNOLIA, MONTPELIER, MOUNT HARMONY, PARK HEIGHTS, PARK MILLS, PARKVILLE, RANDALLSTOWN, RIDGEWAY, SEVERN, SEVERNA PARK, SILVER SPRING, SIMPSONVILLE, SOUTH GATE, SUITLAND-SILVER HILL, TANTALLON, TOWSON, WESTMINSTER, WOODLAWN, AND WOODSTOCK.

National Weather Service

Overstroming

18-7 6:00 p.m. 18:00 – 19-7 0:00 a.m. 00:00

Flood Watch issued July 18 at 11:43AM EDT until July 18 at 8:00PM EDT by NWS Baltimore MD/Washington DC A slow-moving front will interact with a very humid airmass in place to result in multiple rounds of showers and thunderstorms this afternoon and evening. * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Washington DC, and portions of Maryland, including the following areas, Anne Arundel, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Frederick, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford and Southern Baltimore, and northern Virginia, including the following areas, Arlington/Falls Church/Alexandria, Eastern Loudoun, Fairfax and Western Loudoun. * WHEN...From 2 PM this afternoon through 8 PM EDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - High humidity coupled with a slow-moving front is expected to result in multiple rounds of showers and thunderstorms this afternoon and evening. Localized rainfall rates of up to 2 inches per hour, with isolated totals of 2 to 4 inches are possible. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

National Weather Service

Luchtkwaliteit

17-7 8:40 p.m. 20:40 – 19-7 4:00 a.m. 04:00

Air Quality Alert issued July 17 at 4:40PM EDT by NWS Baltimore MD/Washington DC The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Saturday for the Maryland Piedmont region. Concentrations of fine particulate matter due to wildfire smoke will persist at levels consistent with an Air Quality Index of Unhealthy (Red Alert) to Very Unhealthy (Purple Alert) Friday night into Saturday morning. Air quality begins to improve Saturday afternoon. Code Purple and Code Red Air Quality Alerts mean that air pollution concentrations within the region are unhealthy to very unhealthy for the general population. A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx

National Weather Service

Overstroming

18-7 8:37 p.m. 20:37 – 18-7 10:15 p.m. 22:15

806 WGUS71 KLWX 182037 FFSLWX Flash Flood Statement National Weather Service Baltimore MD/Washington DC 437 PM EDT Sat Jul 18 2026 MDC021-182215- /O.CON.KLWX.FF.W.0021.000000T0000Z-260718T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Frederick MD- 437 PM EDT Sat Jul 18 2026 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT THIS EVENING FOR SOUTHERN FREDERICK COUNTY IN NORTH CENTRAL MARYLAND... At 437 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 0.25 inches in 1 hour. Additional rainfall amounts up to 0.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Frederick... Harry Grove Stadium... Ballenger Creek... Braddock Heights... New Market... Linganore-Bartonsville... Clover Hill... Discovery-Spring Garden... Adamstown... Jefferson... Buckeystown... Monrovia... Park Mills... Ijamsville... Clifton... Doubs... Mount Pleasant... Middletown In Frederick Md... PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3935 7725 3933 7727 3930 7731 3927 7743 3933 7754 3935 7755 3942 7756 3945 7744 3946 7734 3943 7728 3937 7723 FLASH FLOOD...RADAR INDICATED EXPECTED RAINFALL RATE...0.25 INCHES IN 1 HOUR $$ KLW

National Weather Service

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