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Extreme HeatRisk and Severe Weather Concerns

Major to Extreme HeatRisk continues for parts of the Mississippi Valley, mid-Atlantic and Northeast today. Additional heat concerns are increasing for the Pacific Northwest this week. Meanwhile, a cold front continues to track southward across the center of the nation. This will focus more showers and thunderstorms, some severe alongside excessive rainfall, from the Plains to the East Coast. Read More >

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Extreme Western Allegany-Including the city of Frostburg Central and Eastern Allegany-Including the city of Cumberland Washington-Including the city of Hagerstown Frederick MD-Including the cities of Frederick and Ballenger Creek Carroll-Including the cities of Eldersburg and Westminster Northern Baltimore-Including the cities of Reisterstown and Cockeysville Southern Baltimore-Including the city of Baltimore Northwest Harford-Including the city of Jarrettsville Southeast Harford-Including the city of Aberdeen Garrett County Northwest Montgomery Central and Southeast Montgomery Northwest Howard-Including the city of Lisbon Central and Southeast Howard-Including the cities of Columbia and Ellicott City Prince Georges-Including the cities of Bowie, Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel, and Camp Springs Charles-Including the cities of St. Charles and Waldorf Calvert-Including the cities of Chesapeake Beach, Huntingtown, Dunkirk, North Beach, Lusby, and Prince Frederick St. Marys-Including the cities of Lexington Park and California Cecil County Western Highland-Including the city of Hightown Eastern Highland-Including the city of Monterey Augusta-Including the cities of Staunton, Waynesboro, and Stuarts Draft" title="Augusta-Including the cities of Staunton, Waynesboro, and Stuarts Draft Central Virginia Blue Ridge-Including the city of Wintergreen Northern Virginia Blue Ridge-Including the city of Big Meadows Rockingham-Including the city of Harrisonburg Shenandoah-Including the cities of Strasburg, Woodstock, Mount Jackson, and New Market Frederick VA-Including the city of Winchester Page-Including the cities of Luray, Shenandoah, and Stanley Warren-Including the city of Front Royal Clarke-Including the city of Berryville Nelson-Including the city of Lovingston Albemarle-Including the city of Charlottesville Greene-Including the city of Stanardsville Madison-Including the city of Madison Rappahannock-Including the city of Washington Orange-Including the cities of Orange and Gordonsville Culpeper-Including the city of Culpeper Northern Fauquier-Including the city of Warrenton Southern Fauquier-Including the city of Turnbull Eastern Loudoun-Including the cities of Leesburg, Ashburn, and Sterling Western Loudoun-Including the cities of Leesburg, Ashburn, and Sterling Spotsylvania-Including the city of Fredericksburg Stafford-Including the city of Falmouth Northwest Prince William-Including the city of Haymarket Central and Southeast Prince William/Manassas/Manassas Park-Including the cities of Dale City, Manassas, Woodbridge, Lake Ridge, and Montclair Fairfax-Including the cities of Reston, Herndon, Annandale, Centreville, Chantilly, McLean, and Franconia Arlington/Falls Church/Alexandria-Including the cities of Arlington, Alexandria, and Falls Church King George-Including the city of Dahlgren Eastern Pendleton-Including the cities of Brandywine, Franklin, Oak Flat, Ruddle, and Sugar Grove Western Pendleton-Including the city of Riverton Western Grant-Including the cities of Bayard and Mount Storm Eastern Grant-Including the city of Petersburg Hardy-Including the city of Moorefield Western Mineral-Including the city of Elk Garden Eastern Mineral-Including the cities of Antioch, Keyser, New Creek, Ridgeville, Russelldale, Headsville, and Fort Ashby Hampshire-Including the city of Romney Morgan-Including the city of Paw Paw Berkeley-Including the city of Martinsburg Jefferson-Including the cities of Charles Town and Shepherdstown


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NWS Sterling Fire Weather Planning forecasts are issued twice a day, at 5:10 AM and 2:10 PM.

Red Flag Criteria

Sustained winds 20 mph along with relative humidity less than 30 percent and fuel moisture less than or equal to 8 percent will initiate a call to the Maryland State Agency regarding a Red Flag Warning or Fire Weather Watch.

For Virginia, a call will be made when sustained winds of 20 mph and relative humidity of less than 30 percent combines with fuel moistures less than 8 percent. Temperatures must be above 40 degrees.

For West Virginia, sustained winds 20 mph along with relative humidity less than or equal to 25 percent and fuel moisture less than or equal to 8 percent will initiate a call to the State Agency. 

Special Weather Statements

Issued in coordination with the state agencies when near red flag criteria are expected.

NWS Sterling Latest Red Flag Warning / Fire Weather Watch - if recently issued/available

NWS Sterling Fire Weather Forecast - available year round (map of area with fire weather zones)

NWS Sterling Fire Weather Matrix (how to decode)


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