Pennsylvania Air Quality Partnership Home
Skip Navigation

Forecast Map

BulletSouthwest
BulletLiberty-Clairton
BulletLehigh Valley
BulletSusquehanna
BulletSoutheast

 


NEWSROOM
FORECASTS
WHAT YOU CAN DO
HEALTH
MONITORING
EDUCATION

 

 
Hotlines
Southwest
Susquehanna
Lehigh Valley
Southeast

 
 
1-800-333-7688
1-888-772-1306
1-877-517-2969
1-800-872-7261

   
BulletBack to Home
BulletSite Index
BulletContacts
BulletImportant Links
BulletFree Plug-ins

 
Ozone Action Logo
Ozone
Action

 

 

 

 

 

 

 

 

 

 

 

 

 

Southeast PA Ozone/PM2.5 Forecast

Small map of Pennsylvania showing counties involved in the se partnership.
Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
September 3, 2015

 

Date: Thursday, September 3, 2015
Action Day?:  Yes (Ozone)
Discussion:
Thursday is an Air Quality Action Day for the Philadelphia metropolitan area for Code Orange (Unhealthy for Sensitive Groups; USG) ozone! Thursday will be another hot, humid, and hazy day. After a period of fog in the morning, mostly sunny skies and light surface will promote ozone formation. Particle concentrations will approach the upper Moderate range in the humid and stagnant air mass, with contributions from smoke transported from the western U.S. wildfires. A weak “back door” (north to south moving) cold front will approach Philadelphia in the evening, but it is not expected to produce widespread clouds or rain that would decrease ozone concentrations.

Extended:
Temperatures will finally drop on Friday as winds turn onshore (northeasterly) and bring cooler and cleaner maritime air into the forecast area. It will still be humid, and particles will decrease but remain in the Moderate range. Scattered clouds and the chance for an afternoon thunderstorm will limit ozone to the low Moderate range. Saturday will be a pleasant start to the holiday weekend, with sunny skies, near average temperatures, and lower humidity. Both ozone and particles will return to the Good range under the influence of strong onshore flow. -Huff

 

Go to the new Air Quality Partnership of the Delaware Valley web site!

Southeast
BulletList of Partners
BulletBecome a Partner
BulletPartner's Resource
BulletMeetings

Forecast Info
Bullet
Forecast via E-mail
BulletAction Days
Bullet
Tally of Forecasts
Bullet
Forecast Calendar

Monitoring
BulletCurrent AQI
BulletPollution Levels

Forecast Key
  AQI Forecast Key Information What Do
the Colors Mean?