OPEN BURNING ANNOUNCEMENT MODEL GUIDANCE
1000 PM PDT MON AUG 24 2026
NBM model output for: Salem KSLE  44.98N, -122.99W 
Model Run Time:  2026-08-25 04Z

                             Mixing      Sfc     Transport                                 
                   Time      Height     Winds      Winds   Ventilation                    
  Day   Date      (PDT)     (ft MSL)    (mph)      (mph)      Index       Remarks         
  === ========   ========   =======    =======    =======    =======      =======         
  Mon Aug 24th   10:00 pm      400     230/00     250/06        2        
  Mon Aug 24th   11:00 pm      400     190/00     190/06        2        

  Tue Aug 25th   12:00 am      400     180/03     190/08        3        
  Tue Aug 25th    1:00 am      400     180/07     190/10        4        
  Tue Aug 25th    2:00 am      400     180/08     190/12        5        
  Tue Aug 25th    3:00 am      400     190/08     190/10        4        
  Tue Aug 25th    4:00 am      400     190/08     190/09        4        
  Tue Aug 25th    5:00 am      400     180/07     210/08        3        
  Tue Aug 25th    6:00 am      400     170/07     210/08        3        
  Tue Aug 25th    7:00 am      400     180/08     190/08        3        
  Tue Aug 25th    8:00 am      900     190/08     190/09        8        
  Tue Aug 25th    9:00 am     1400     190/08     200/10       14        
  Tue Aug 25th   10:00 am     1700     190/08     200/10       18        
  Tue Aug 25th   11:00 am     2100     200/09     200/10       22        
  Tue Aug 25th   12:00 pm     2600     200/09     200/10       27        
  Tue Aug 25th    1:00 pm     3300     200/09     200/12       38        Criteria Met
  Tue Aug 25th    2:00 pm     3700     210/09     200/12       43        Criteria Met
  Tue Aug 25th    3:00 pm     4000     230/10     200/12       46        Criteria Met
  Tue Aug 25th    4:00 pm     3600     240/12     240/13       46        Criteria Met
  Tue Aug 25th    5:00 pm     3000     250/12     250/13       38        Criteria Met
  Tue Aug 25th    6:00 pm     2400     250/12     260/12       28        
  Tue Aug 25th    7:00 pm     1400     260/09     270/10       14        
  Tue Aug 25th    8:00 pm      700     260/08     270/10        7        
  Tue Aug 25th    9:00 pm      400     260/06     260/08        3        
  Tue Aug 25th   10:00 pm      400     230/03     240/06        2        
  Tue Aug 25th   11:00 pm      400     210/00     230/06        2        

  Wed Aug 26th    2:00 am      400     230/00     220/05        2        
  Wed Aug 26th    5:00 am      400     210/00     210/05        2        
  Wed Aug 26th    8:00 am     1000     200/00     200/06        6        
  Wed Aug 26th   11:00 am     2200     200/06     210/07       15        
  Wed Aug 26th    2:00 pm     4200     230/05     220/09       39        Criteria Met
  Wed Aug 26th    5:00 pm     4700     250/09     250/12       54        Criteria Met
  Wed Aug 26th    8:00 pm      900     280/09     270/10        9        
  Wed Aug 26th   11:00 pm      400     240/03     250/06        2        

  Thu Aug 27th    2:00 am      400     210/05     200/05        2        
  Thu Aug 27th    5:00 am      400     190/03     200/06        2        
  Thu Aug 27th    8:00 am     1200     200/06     210/07        8        
  Thu Aug 27th   11:00 am     4500     210/07     220/08       36        Criteria Met
  Thu Aug 27th    2:00 pm     6400     240/08     240/08       52        Criteria Met
  Thu Aug 27th    5:00 pm     5500     270/12     270/12       63        Criteria Met
  Thu Aug 27th    8:00 pm     1000     300/09     310/10       10        

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.