SIGNIFICANT FIRE POTENTIAL CALCULATIONS
OREGON FIRE DANGER RATING AREAS
OREGON DEPARTMENT OF FORESTRY
BASED ON DATA FOR 1300 PST SUNDAY, MAY 20TH, 2012


Significant fire potential adjective ratings are determined by Fire Danger
Rating Area (FDRA) using weighted averages of ERC and (for some FDRA\'s) a 
weighted average minimum relative humidity for that area.

This system was developed by ODF's Fire Environmental Working Group.  
For more information contact Teresa Vonn at (541) 664-3328 or 
tvonn@odf.state.or.us.

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NORTHWEST OREGON - FDRA 1                                ADJECTIVE RATING: LOW             

  WILKINSON RIDGE - 7F3P3 (25%)        0
  MILLER - 7F2P3 (25%)                 0
  RYE MOUNTAIN - 7F2P3 (50%)           0
                                     ===
              ERC Weighted Average:    0
                        Avg Min RH:   31  (Adjective from look-up table - see below)

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WESTERN LANE - FDRA 2                                    ADJECTIVE RATING: MODERATE        

  HIGH POINT - 7K3P3 (25%)            40
  VILLAGE CREEK - 7K3P4 (75%)         35
                                     ===
              ERC Weighted Average:   36
  (Adjective Thresholds: Moderate - 24, High - 49, Extremely High - 67)

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COOS FOREST PROT. ASSOC. - Zone 3) .  

  No Significant Fire Potential Analysis Available

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DOUGLAS FOREST PROT. ASSOC. - FDRA 4                     ADJECTIVE RATING: LOW             

  SILVER BUTTE - 7G3P3 (33%)          27
  GRANDAD RAWS - 7G3P3 (67%)          22
                                     ===
              ERC Weighted Average:   24
  (Adjective Thresholds: Moderate - 25, High - 42, Extremely High - 54)

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SOUTHWEST OREGON - FDRA 5                                ADJECTIVE RATING: MODERATE        

  ONION2 - 7G3P3 (25%)                30
  MERLIN - 7G2P2 (25%)                35
  SQUAW - 7G3P2 (25%)                 46
  BUCKHORN_SPRINGS - 7G2P2 (25%)      49
                                     ===
              ERC Weighted Average:   40
                        Avg Min RH:   25  (Adjective from look-up table - see below)

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KLAMATH/LAKEVIEW DISTRICT - FDRA 6                       ADJECTIVE RATING: MODERATE        

  PARKER MOUNTAIN - 7K2P2 (25%)       57
  TIMOTHY - 7K2P2 (37%)               54
  COFFEE POT - 7K2P2 (38%)            59
                                     ===
              ERC Weighted Average:   57
  (Adjective Thresholds: Moderate - 53, High - 64, Extremely High - 75)

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WALKER RANGE - FDRA 8                                    ADJECTIVE RATING: MODERATE        

  LAVA BUTTE - 7K1P2 (100%)           62
                                     ===
              ERC Weighted Average:   62
  (Adjective Thresholds: Moderate - 46, High - 63, Extremely High - 73)

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SOUTH CASCADES - FDRA 9                                  ADJECTIVE RATING: LOW             

  TROUT CREEK - 7G3P3 (33%)           16
  BRUSH CREEK - 7G3P3 (33%)           20
  PEBBLE - 7G3P3 (33%)                18
                                     ===
              ERC Weighted Average:   18
  (Adjective Thresholds: Moderate - 22, High - 37, Very High - 55)

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NORTH CASCADES - FDRA 10                                 ADJECTIVE RATING: LOW             

  HORSE CREEK - 7K1P3 (67%)           25
  EAGLE CREEK - 7K3P3 (33%)           21
                                     ===
              ERC Weighted Average:   24
  (Adjective Thresholds: Moderate - 30, High - 47, Very High - 57)

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THE DALLES - FDRA 11                                     ADJECTIVE RATING: LOW             

  WASCO BUTTE - 7K2P2 (71%)           37
  MIDDLE MTN - 7K2P2 (29%)            29
                                     ===
              ERC Weighted Average:   35
  (Adjective Thresholds: Moderate - 37, High - 50, Extremely High - 64)

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PRINEVILLE/SISTERS - FDRA 12                             ADJECTIVE RATING: MODERATE        

  BOARD HOLLOW - 7G2P2 (67%)          55
  LAVA BUTTE - 7G1P2 (33%)            55
                                     ===
              ERC Weighted Average:   55
  (Adjective Thresholds: Moderate - 42, High - 56, Extremely High - 69)

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JOHN DAY - FDRA 13                                       ADJECTIVE RATING: MODERATE        

  CASE - 7K2P2 (50%)                  57
  BOARD CREEK - 7K2P2 (50%)           55
                                     ===
              ERC Weighted Average:   56
  (Adjective Thresholds: Moderate - 40, High - 59, Extremely High - 74)

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NORTHEAST OREGON - FDRA 14                               ADJECTIVE RATING: MODERATE        

  CASE - 7G2P2 (25%)                  44
  EDEN - 7G2P2 (25%)                  48
  J-RIDGE - 7G3P2 (25%)               48
  SPARTA BUTTE - 7G3P2 (25%)          53
                                     ===
              ERC Weighted Average:   48
  (Adjective Thresholds: Moderate - 35, High - 51, Extremely High - 68)

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FDRA 1 Adjective Logic:

  if(Avg Min RH = missing){
     Use the ERC threshold values to determine adjectives
      (5, 10, 14)
  }else if (Avg Min RH<26){
      if (Avg ERC>=18){
        Adjective = "Very High";
      }else if(Avg ERC>=10){
        Adjective = "High";
      }else if(Avg ERC>=4){
        Adjective = "Moderate";
      }else{
	Adjective = "Low";
      }
  }else if (Avg Min RH<=38){
      if(Avg ERC>=10){
        Adjective = "High";
      }else if(Avg ERC>=4){
        Adjective = "Moderate";
      }else{
	Adjective = "Low";
     }
  }else{
      if(Avg ERC>=8){
        Adjective = "Moderate";
     }else{
	Adjective = "Low";
      }
  }


FDRA 5 Adjective Logic:

  if(Avg Min RH = missing){
     Use the ERC threshold values to determine adjectives
      (35,47,59)
  }else if (Avg Min RH<27){
      if (Avg ERC>59){
        Adjective = "Extreme";
	  }else if(Avg ERC>=47){
        Adjective = "High";
	  }else{
        Adjective = "Moderate";
	  }
  }else if (Avg Min RH<=31){
      if(Avg ERC>=47){
        Adjective = "High";
	  }else{
        Adjective = "Moderate";
	  }
  }else if (Avg Min RH<=33){
      if(Avg ERC>=47){
        Adjective = "High";
	  }else if(Avg ERC>=35{
        Adjective = "Moderate";
	  }else{
	    Adjective = "Low";
	  }
  }else if (Avg Min RH<=35){
     if(Avg ERC>=47){
        Adjective = "High";
	  }else if(Avg ERC>=41)
        Adjective = "Moderate";
	  }else{
	    Adjective = "Low";
	  }
  }else{
     if(Avg ERC>=47){
        Adjective = "High";
	  }else if(Avg ERC>=44)
        Adjective = "Moderate";
	  }else{
	    Adjective = "Low";
	  }


$$