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.