OPEN BURNING ANNOUNCEMENT MODEL GUIDANCE
1000 AM PDT MON AUG 24 2026
NBM model output for: Eugene KEUG  44.14N, -123.21W 
Model Run Time:  2026-08-24 16Z

                             Mixing      Sfc     Transport                                 
                   Time      Height     Winds      Winds   Ventilation                    
  Day   Date      (PDT)     (ft MSL)    (mph)      (mph)      Index       Remarks         
  === ========   ========   =======    =======    =======    =======      =======         
  Mon Aug 24th   10:00 am     1300     010/07     020/08       10        
  Mon Aug 24th   11:00 am     1800     010/07     020/07       12        
  Mon Aug 24th   12:00 pm     2000     360/07     020/07       14        
  Mon Aug 24th    1:00 pm     2400     360/06     360/06       14        
  Mon Aug 24th    2:00 pm     2700     360/06     350/06       16        
  Mon Aug 24th    3:00 pm     3400     350/05     320/05       16        
  Mon Aug 24th    4:00 pm     3900     340/03     300/06       22        
  Mon Aug 24th    5:00 pm     4200     350/00     290/05       19        
  Mon Aug 24th    6:00 pm     4500     350/00     270/06       26        
  Mon Aug 24th    7:00 pm     1100     270/00     270/07        8        
  Mon Aug 24th    8:00 pm      400     240/01     260/09        4        
  Mon Aug 24th    9:00 pm      400     230/07     250/09        4        
  Mon Aug 24th   10:00 pm      400     220/08     230/09        4        
  Mon Aug 24th   11:00 pm      400     200/10     200/10        4        

  Tue Aug 25th   12:00 am      400     200/10     200/10        4        
  Tue Aug 25th    1:00 am      400     200/09     200/09        4        
  Tue Aug 25th    2:00 am      400     200/08     210/08        3        
  Tue Aug 25th    3:00 am      300     200/08     210/08        2        
  Tue Aug 25th    4:00 am      300     200/07     210/07        2        
  Tue Aug 25th    5:00 am      400     200/07     210/07        3        
  Tue Aug 25th    6:00 am      400     200/07     210/07        3        
  Tue Aug 25th    7:00 am      500     200/06     220/06        3        
  Tue Aug 25th    8:00 am      900     210/06     230/07        6        
  Tue Aug 25th    9:00 am     1200     210/07     230/07        8        
  Tue Aug 25th   10:00 am     1700     220/07     230/07       12        
  Tue Aug 25th   11:00 am     2100     230/07     230/08       17        
  Tue Aug 25th    2:00 pm     3400     240/09     240/10       35        Criteria Met
  Tue Aug 25th    5:00 pm     2500     270/12     260/13       32        
  Tue Aug 25th    8:00 pm      500     250/08     260/12        6        
  Tue Aug 25th   11:00 pm      400     220/03     230/06        2        

  Wed Aug 26th    2:00 am      400     220/00     230/05        2        
  Wed Aug 26th    5:00 am      400     210/00     200/05        2        
  Wed Aug 26th    8:00 am     1000     200/01     210/05        5        
  Wed Aug 26th   11:00 am     2300     220/03     220/06       13        
  Wed Aug 26th    2:00 pm     4400     260/05     240/08       35        
  Wed Aug 26th    5:00 pm     3900     270/12     260/12       45        Criteria Met
  Wed Aug 26th    8:00 pm      900     270/09     270/12       10        
  Wed Aug 26th   11:00 pm      500     250/06     250/06        3        

  Thu Aug 27th    2:00 am      400     220/05     220/05        2        
  Thu Aug 27th    5:00 am      700     200/03     200/05        3        
  Thu Aug 27th    8:00 am     1400     200/05     200/05        6        

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.