OPEN BURNING ANNOUNCEMENT MODEL GUIDANCE 800 AM PDT TUE AUG 25 2026 NBM model output for: Salem KSLE 44.98N, -122.99W Model Run Time: 2026-08-25 15Z Mixing Sfc Transport Time Height Winds Winds Ventilation Day Date (PDT) (ft MSL) (mph) (mph) Index Remarks === ======== ======== ======= ======= ======= ======= ======= Tue Aug 25th 9:00 am 1300 200/08 200/09 12 Tue Aug 25th 10:00 am 1800 200/08 200/09 17 Tue Aug 25th 11:00 am 2400 200/08 200/09 22 Tue Aug 25th 12:00 pm 2600 200/09 200/09 24 Tue Aug 25th 1:00 pm 3300 210/09 200/10 34 Criteria Met Tue Aug 25th 2:00 pm 3700 210/09 200/10 38 Criteria Met Tue Aug 25th 3:00 pm 4100 230/10 210/12 47 Criteria Met Tue Aug 25th 4:00 pm 3700 240/12 240/12 43 Criteria Met Tue Aug 25th 5:00 pm 3200 250/12 250/13 41 Criteria Met Tue Aug 25th 6:00 pm 2500 250/12 260/12 29 Tue Aug 25th 7:00 pm 1700 250/09 270/12 20 Tue Aug 25th 8:00 pm 700 260/08 270/10 7 Tue Aug 25th 9:00 pm 500 260/06 260/07 3 Tue Aug 25th 10:00 pm 400 250/01 250/06 2 Tue Aug 25th 11:00 pm 400 220/00 230/06 2 Wed Aug 26th 12:00 am 400 220/00 230/05 2 Wed Aug 26th 1:00 am 400 220/00 220/05 2 Wed Aug 26th 2:00 am 400 230/00 220/05 2 Wed Aug 26th 3:00 am 400 200/00 210/05 2 Wed Aug 26th 4:00 am 400 190/00 200/05 2 Wed Aug 26th 5:00 am 400 200/00 190/03 1 Wed Aug 26th 6:00 am 400 200/00 190/03 1 Wed Aug 26th 7:00 am 400 200/00 190/05 2 Wed Aug 26th 8:00 am 900 190/00 190/05 4 Wed Aug 26th 9:00 am 1700 200/05 200/06 10 Wed Aug 26th 11:00 am 2300 200/06 210/07 16 Wed Aug 26th 2:00 pm 4400 220/06 220/08 35 Criteria Met Wed Aug 26th 5:00 pm 4900 250/10 250/10 51 Criteria Met Wed Aug 26th 8:00 pm 1000 280/08 270/09 9 Wed Aug 26th 11:00 pm 400 230/03 240/07 3 Thu Aug 27th 2:00 am 400 200/05 220/06 2 Thu Aug 27th 5:00 am 400 190/03 200/06 2 Thu Aug 27th 8:00 am 1400 190/06 210/08 11 Thu Aug 27th 11:00 am 3500 210/07 210/08 28 Criteria Met Thu Aug 27th 2:00 pm 6000 230/07 240/09 55 Criteria Met Thu Aug 27th 5:00 pm 5400 280/12 270/12 62 Criteria Met Thu Aug 27th 8:00 pm 1100 300/09 300/10 11 Thu Aug 27th 11:00 pm 400 290/02 290/07 3 Fri Aug 28th 2:00 am 400 280/00 290/05 2 Fri Aug 28th 5:00 am 400 340/00 350/03 1 Fri Aug 28th 8:00 am 900 350/02 010/05 4 Notes: Mixing Height = NBM mixing height (MHT) SFC Winds = NBM 10 meter winds Transport Winds = NBM transport wind through the mixed layer Criteria: Field-burning season (July 5 - September 30): Mixing Height >= 3000 feet, with Surface Winds >= 5 mph and Transport Winds >= 7 mph. Rest of year: Mixing Height >= 2000 feet or Ventilation Index >= 20, with Surface Winds >= 5 mph and Transport Winds >= 7 mph. In addition (both seasons): Transport wind direction greater than 10 and less than 350 degrees. Ventilation Index = Mixing Height (ft) x Transport Wind (mph) / 1000.