OPEN BURNING ANNOUNCEMENT MODEL GUIDANCE
300 PM PDT MON AUG 24 2026
NBM model output for: Eugene KEUG  44.14N, -123.21W 
Model Run Time:  2026-08-24 21Z

                             Mixing      Sfc     Transport                                 
                   Time      Height     Winds      Winds   Ventilation                    
  Day   Date      (PDT)     (ft MSL)    (mph)      (mph)      Index       Remarks         
  === ========   ========   =======    =======    =======    =======      =======         
  Mon Aug 24th    3:00 pm     3000     350/05     300/05       14        
  Mon Aug 24th    4:00 pm     3600     340/03     280/05       17        
  Mon Aug 24th    5:00 pm     4100     340/00     270/05       19        
  Mon Aug 24th    6:00 pm     4200     330/00     270/06       24        
  Mon Aug 24th    7:00 pm     1400     270/00     270/08       11        
  Mon Aug 24th    8:00 pm      500     250/05     260/09        5        
  Mon Aug 24th    9:00 pm      400     230/07     250/10        4        
  Mon Aug 24th   10:00 pm      400     220/08     230/09        4        
  Mon Aug 24th   11:00 pm      400     200/12     200/12        5        

  Tue Aug 25th   12:00 am      400     200/12     200/12        5        
  Tue Aug 25th    1:00 am      400     200/10     210/10        4        
  Tue Aug 25th    2:00 am      300     200/09     210/09        3        
  Tue Aug 25th    3:00 am      300     200/08     220/08        2        
  Tue Aug 25th    4:00 am      300     200/07     220/07        2        
  Tue Aug 25th    5:00 am      400     210/07     220/07        3        
  Tue Aug 25th    6:00 am      400     200/07     220/07        3        
  Tue Aug 25th    7:00 am      600     200/06     210/06        3        
  Tue Aug 25th    8:00 am      900     210/07     220/07        6        
  Tue Aug 25th    9:00 am     1300     210/07     220/07        9        
  Tue Aug 25th   10:00 am     1600     220/07     230/07       11        
  Tue Aug 25th   11:00 am     2100     220/07     230/07       14        
  Tue Aug 25th   12:00 pm     2400     230/07     230/08       19        
  Tue Aug 25th    1:00 pm     2900     240/08     230/09       27        
  Tue Aug 25th    2:00 pm     3200     250/09     250/12       37        Criteria Met
  Tue Aug 25th    3:00 pm     3200     260/12     250/12       37        Criteria Met
  Tue Aug 25th    5:00 pm     2600     260/13     260/13       33        
  Tue Aug 25th    8:00 pm      500     250/08     260/10        5        
  Tue Aug 25th   11:00 pm      400     220/03     230/05        2        

  Wed Aug 26th    2:00 am      500     220/00     230/03        2        
  Wed Aug 26th    5:00 am      600     220/00     210/03        2        
  Wed Aug 26th    8:00 am     1000     200/02     210/03        3        
  Wed Aug 26th   11:00 am     2600     210/03     220/06       15        
  Wed Aug 26th    2:00 pm     4400     250/05     230/08       35        
  Wed Aug 26th    5:00 pm     4100     270/13     260/13       52        Criteria Met
  Wed Aug 26th    8:00 pm      600     260/09     250/10        6        
  Wed Aug 26th   11:00 pm      600     240/06     240/07        4        

  Thu Aug 27th    2:00 am      600     230/03     220/05        3        
  Thu Aug 27th    5:00 am      700     210/02     220/03        2        
  Thu Aug 27th    8:00 am     1300     210/05     250/05        6        
  Thu Aug 27th   11:00 am     3900     220/05     220/06       22        
  Thu Aug 27th    2:00 pm     5800     250/06     240/06       33        

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.