027 AEUS71 KRNK 172015 AQIRNK AIR QUALITY FORECAST NATIONAL WEATHER SERVICE BLACKSBURG VA 410 PM EDT FRI APR 17 2026 AIR QUALITY FORECASTS FOR THE ROANOKE AREA ARE PROVIDED BY THE VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY. VAZ022-182000- THE ROANOKE AREA FORECAST FOR SATURDAY IS CODE LEVEL GREEN...WHICH IS GOOD...AND MEANS LITTLE OR NO HEALTH RISK. PRIMARY POLLUTANT WILL BE OZONE. ADDITIONAL INFORMATION...PLEASE VISIT THE VIRGINIA DEQ AIR QUALITY WEB SITE AT HTTPS://WWW.DEQ.VIRGINIA.GOV/OUR-PROGRAMS/AIR/MONITORING-ASSESSMENTS/AIR-QUALITY-FORECAST && $$  014 AEUS71 KCLE 172030 AQICLE Air Quality Forecast Pennsylvania Department of Environmental Protection Relayed by National Weather Service Cleveland OH 430 PM EDT Fri Apr 17 2026 Air quality forecasts for Pennsylvania are provided by the Pennsylvania Department of Environmental Protection. PAZ001-002-190100- Northern and Southern Erie- 430 PM EDT Fri Apr 17 2026 The forecast for Saturday in Erie is code GREEN, which is good, and means little or no health risk. The primary pollutant will be ozone. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/ $$  039 AEUS71 KPBZ 172030 AQIPBZ Air Quality Forecast Pennsylvania Department of Environmental Protection Relayed by National Weather Service Pittsburgh PA 430 PM EDT Fri Apr 17 2026 Air quality forecasts for Pennsylvania are provided by the Pennsylvania Department of Environmental Protection. PAZ014-020>022-029-073>076-182000- Allegheny-Butler-Beaver-Armstrong-Washington-Westmoreland-Fayette- 430 PM EDT Fri Apr 17 2026 The forecast for Saturday in Pittsburgh is code GREEN, which is good, and means little or no health risk. The primary pollutant will be ozone. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/ $$ PAZ021-182000- Allegheny- 430 PM EDT Fri Apr 17 2026 The forecast for Saturday in Liberty-Clairton Area is code GREEN, which is good, and means little or no health risk. The primary pollutant will be fine particles. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/ $$ PAZ077-078-182000- Indiana-Higher Elevations of Indiana- 430 PM EDT Fri Apr 17 2026 The forecast for Saturday in Indiana County is code GREEN, which is good, and means little or no health risk. The primary pollutant will be ozone. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/ $$ PAZ007-182000- Mercer- 430 PM EDT Fri Apr 17 2026 The forecast for Saturday in Mercer County is code GREEN, which is good, and means little or no health risk. The primary pollutant will be ozone. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/ $$  690 AEUS71 KLWX 172040 AQILWX MD Dept of Environment and VA Dept of Environmental Quality Relayed by National Weather Service Baltimore MD/Washington DC 440 PM EDT Fri Apr 17 2026 Air Quality Forecasts for Northern Virginia are provided by the Virginia Department of Environmental Quality. Air Quality Forecasts for the DC metro are provided by the Metropolitan Washington Council of Governments. Air Quality Forecasts for Maryland are provided by the Maryland Department of Environment. DCZ001-182000- District of Columbia- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for the District of Columbia is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site https://www.mwcog.org/environment/air/forecast/. $$ VAZ053-054-505-506-526-527-182000- Fairfax-Western Loudoun-Eastern Loudoun-Northwest Prince William- Central and Southeast Prince William/Manassas/Manassas Park- Arlington/Falls Church/Alexandria- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Northern Virginia is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site www.deq.virginia.gov. $$ MDZ013-504-506-182000- Central and Southeast Montgomery-Central and Southeast Howard- Prince Georges- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for the Maryland suburban DC region is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ011-014-182000- Southern Baltimore-Anne Arundel- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for the Baltimore City Metro and Annapolis region is code level GREEN...which is good...and means little or no health risk. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ004-005-503-505-182000- Frederick-Carroll-Northwest Montgomery-Northwest Howard- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for the Maryland Piedmont region is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ006-507-182000- Northern Baltimore-Northern Harford- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Northern Baltimore is code level GREEN...which is good...and means little or no health risk. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ008-508-182000- Southern Harford-Cecil- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Northeast Maryland is code level GREEN...which is good...and means little or no health risk. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ016>018-182000- Charles-St. Marys-Calvert- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Southern Maryland is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ VAZ028-031-WVZ051>053-182000- Frederick-Clarke-Morgan-Berkeley-Jefferson- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Winchester and the eastern West Virginia Panhandle is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site www.deq.virginia.gov. $$ MDZ003-182000- Washington- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for the Hagerstown area is code level YELLOW...which is moderate...and means people unusually sensitive to air pollution may be mildly affected. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$ MDZ001-501-502-182000- Garrett-Allegany- 440 PM EDT Fri Apr 17 2026 The forecast Saturday for Western Maryland is code level GREEN...which is good...and means little or no health risk. Primary pollutant will be ozone. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx. $$