Wildfire smoke
2012-04-09 through 2012-04-11 wildfire-smoke episode affecting Jacksonville, FL
Named source County Line Fire 34,936 acres , FL · ICS-209-PLUS FL-FNF-012017
Daily PM2.5 peaked at 82.8 µg/m³ near Jacksonville across 1 covered metro home to 1.8 million people. 1 metro placed a top-ten day in their record.
Counting the extra PM2.5 above each metro's typical day, this event handed the average affected resident ≈ 6.4 cigarettes. Across everyone living in the affected metros, that is the collective equivalent of ≈ 11 million cigarettes. An awareness illustration of outdoor exposure at 22 µg/m³ per cigarette (Berkeley Earth), counting only the event's ranked days; not a medical dose.
Episode peak
-- cigarettes
The smoke map's scale, replayed over this event: the surface interpolates between covered metros' daily records, framed to the affected region. Hover for a reading, click a metro to pin it to the card. Days a monitor did not report draw nothing.
What happened, in the record
The supplied official assessment attributes unhealthy particulate matter around Jacksonville during April 9-11 to County Line Fire smoke, with incident meteorology corroborating dense smoke during the period.
Affected metros
| Metro | Peak PM2.5 | Cigarettes, whole event | Peak day | All-time standing |
|---|---|---|---|---|
| Jacksonville, FL | 82.8 µg/m³ | 7.6 | Apr 11, 2012 | #2 of its top days |
"Cigarettes, whole event" totals a metro's ranked event days at 22 µg/m³ per cigarette: what a person outdoors there breathed across the event, as the illustration. "All-time standing" is where this episode's days sit in each metro's ranked record (worst-area measure, since 1999). Full local context is on each metro's Air Records page.
The evidence
Agency and publisher pages 2
- County Line Fire in Florida NASA reports that smoke from the County Line Fire elevated particulate matter around and south of Jacksonville to unhealthy levels; the fire had burned about 25,000 acres by April 11.
- County Line Wildfire Incident Action Plan, April 12, 2012 The incident meteorologist forecast documented dense smoke and fog near the County Line Fire during the period of the Jacksonville air-quality event.
Status and provenance
Research preview: this record carries research-only status and its boundaries, cause, and name may change as evidence review completes. Grouping policy common_sense_root_cause_grouping.v2. The cause label reflects the assembled evidence above, not an IAQng detection formula.