2. Ozone Exceedances and Elevated PM2.5 Connecticut June 11, 2015
Michael Geigert
CTDEEP

3. Ozone NAAQS Exceeded at 6 CT Monitors

4. NAM Met model predicts very warm temperatures and southwest winds
NAM Met model 8:00am -11:00pm, Thursday June 11, 2015
NAM Met model predicts very warm temperatures and southwest winds

5. NOAA Ozone Model 8:00am -11:00pm

6. NOAA Ozone Model 8-hr Forecast

7. AirNow 8-hr Ozone Forecast AQI Map for June 11, 2015

8. AirNow 8-hr Ozone Observed AQI Map for June 11, 2015

9. Barons Ozone Model 8:00am -8:00pm

10. Barons Ozone Model 8-hr average

11. CT Monitored Hourly Ozone PPB, June 11, 2015

16. Surface Animation June 11th, 2:00 am- 8:00pm

18. Aqua/Terra Images from June 9- June 11
Note the plume from Canadian wildfires

19. Note high moderate levels beneath the plume
PM2.5 levels at 1:00pm
Note high moderate levels beneath the plume

20. Hourly PM2.5 at CT Monitors
June 11, 2015

21. Bright green on ceilometer shows high aerosol levels near the ground

22. Ozone ppbs at 1:00pm Note high levels from LI to CT coast
3:00 pm 24-hr back trajectories from Madison Monitor
100 meter height shows transport from I-95 corridor

23. Both Barons and NOAA models showed good agreement for coastal exceedances
NOAA model showed exceedances along entire CT coast
Modeled 8-hours averages ranged from 75ppb Groton to 90 ppb New Haven (June 10th model runs)
NOAA 12z (June 10) model was very close on highest 8-hour average in State (New Haven observed= 93 ppb)
CT Forecasters accurately predicted exceedances at coastal counties because of confidence in the NOAA model output
It is possible that the Canadian wildfire smoke increased the ozone concentrations- needs further study