SIGNIFICANT FIRE POTENTIAL CALCULATIONS OREGON FIRE DANGER RATING AREAS OREGON DEPARTMENT OF FORESTRY BASED ON DATA FOR 1300 PST MONDAY, DECEMBER 28TH, 2020 Significant Fire Potential (SFP) 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 Alcock at (503) 945-7226 or Teresa.Alcock@oregon.gov. --------------------------------------------------------------------------------------- NORTHWEST OREGON - FDRA 1 SFP RATING: LOW (Analysis period: 1998-2016) WILKINSON RIDGE - 7F3P3 (25%) 44, MILLER - 7F2P3 (25%) 71, RYE MOUNTAIN - 7F2P3 (50%) 4, === ERC Weighted Average: 0 Avg Min RH: 21 (SFP from look-up table - see below) --------------------------------------------------------------------------------------- WESTERN LANE - FDRA 2 SFP RATING: LOW (Analysis period: 2008-2017) HIGH POINT - 7K3P3 (25%) 3, VILLAGE CREEK - 7K3P4 (75%) , === ERC Weighted Average: 2 (SFP Thresholds: Moderate - 23, High - 50, Extreme - 60) --------------------------------------------------------------------------------------- COOS FOREST PROT. ASSOC. - FDRA 3 SFP RATING: LOW (Analysis period: 2005-2015) BALD2 - 7G3P3 (50%) 8, BURNT MOUNTAIN - 7G3P3 (50%) , === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 25, High - 45, Extreme - 65) --------------------------------------------------------------------------------------- DOUGLAS FOREST PROT. ASSOC. - FDRA 4 SFP RATING: LOW (Analysis period: 1999-2015) SILVER BUTTE - 7G3P3 (33%) , GRANDAD RAWS - 7G3P3 (67%) 2, === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 24, High - 42, Extreme - 56) --------------------------------------------------------------------------------------- SOUTHWEST OREGON - FDRA 5 SFP RATING: MODERATE (Analysis period: 2004-2013) CALVERT - 7G3P3 (25%) , MERLIN - 7G2P2 (25%) 77, SQUAW - 7G3P2 (25%) 48. BUCKHORN_SPRINGS - 7G2P2 (25%) , === ERC Weighted Average: 13 Avg Min RH: 17 (SFP from look-up table - see below) --------------------------------------------------------------------------------------- KLAMATH/LAKEVIEW DISTRICT - FDRA 6 SFP RATING: LOW (Analysis period: 1998-2012) PARKER MOUNTAIN - 7K2P2 (25%) 7, TIMOTHY - 7K2P2 (37%) 4, COFFEE POT - 7K2P2 (38%) 19, === ERC Weighted Average: 27 (SFP Thresholds: Moderate - 53, High - 64, Extreme - 75) --------------------------------------------------------------------------------------- WALKER RANGE - FDRA 8 SFP RATING: LOW (Analysis period: 1992-2013) LAVA BUTTE - 7K1P2 (100%) 0, === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 46, High - 63, Extreme - 77) --------------------------------------------------------------------------------------- SOUTH CASCADES - FDRA 9 SFP RATING: LOW (Analysis period: 1997-2016) TROUT CREEK - 7G3P3 (33%) , BRUSH CREEK - 7G3P3 (33%) , PEBBLE - 7G3P3 (33%) 1, === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 22, High - 34, Very High - 45) --------------------------------------------------------------------------------------- NORTH CASCADES - FDRA 10 SFP RATING: LOW (Analysis period: 2000-2016) HORSE CREEK - 7K1P3 (67%) 1, EAGLE CREEK - 7K3P3 (33%) , === ERC Weighted Average: 8 (SFP Thresholds: Moderate - 29, High - 45, Very High - 54) --------------------------------------------------------------------------------------- THE DALLES - FDRA 11 SFP RATING: LOW (Analysis period: 1998-2014) WASCO BUTTE - 7K2P2 (71%) 94, MIDDLE MTN - 7K2P2 (29%) .6, === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 39, High - 56, Extreme - 66) --------------------------------------------------------------------------------------- PRINEVILLE/SISTERS - FDRA 12 SFP RATING: LOW (Analysis period: 1995-2013) BOARD HOLLOW - 7G2P2 (67%) 0, LAVA BUTTE - 7G1P2 (33%) 0, === ERC Weighted Average: 0 (SFP Thresholds: Moderate - 42, High - 58, Extreme - 69) --------------------------------------------------------------------------------------- JOHN DAY - FDRA 13 SFP RATING: LOW (Analysis period: 1995-2012) CASE - 7K2P2 (50%) 1 BOARD CREEK - 7K2P2 (50%) , === ERC Weighted Average: 36 (SFP Thresholds: Moderate - 45, High - 63, Extreme - 74) --------------------------------------------------------------------------------------- NORTHEAST OREGON - FDRA 14 SFP RATING: LOW (Analysis period: 1993-2012) CASE - 7G2P2 (25%) 1 EDEN - 7G2P2 (25%) .56 J-RIDGE - 7G2P2 (25%) 8. SPARTA BUTTE - 7G3P2 (25%) 0, === ERC Weighted Average: 9 (SFP Thresholds: Moderate - 38, High - 55, Extreme - 69) --------------------------------------------------------------------------------------- FDRA 1 SFP Logic: if(Avg Min RH = missing){ Use the ERC threshold values to determine SFP (6, 12, 18) }else if (Avg Min RH<26){ if (Avg ERC>=18){ SFP = "Very High"; }else if(Avg ERC>=12){ SFP = "High"; }else if(Avg ERC>=6){ SFP = "Moderate"; }else{ SFP = "Low"; } }else if (Avg Min RH<=39){ if(Avg ERC>=12){ SFP = "High"; }else if(Avg ERC>=6){ SFP = "Moderate"; }else{ SFP = "Low"; } }else{ if(Avg ERC>=6){ SFP = "Moderate"; }else{ SFP = "Low"; } } FDRA 5 SFP Logic: if(Avg Min RH = missing){ Use the ERC threshold values to determine SFP (33,49,64) }else if (Avg Min RH<26){ if (Avg ERC>=64){ SFP = "Extreme"; }else if(Avg ERC>=49){ SFP = "High"; }else{ SFP = "Moderate"; } }else if (Avg Min RH<=30){ if(Avg ERC>=49){ SFP = "High"; }else{ SFP = "Moderate"; } }else if (Avg Min RH<=32){ if(Avg ERC>=49){ SFP = "High"; }else if(Avg ERC>=33{ SFP = "Moderate"; }else{ SFP = "Low"; } }else if (Avg Min RH<=34){ if(Avg ERC>=49){ SFP = "High"; }else if(Avg ERC>=39) SFP = "Moderate"; }else{ SFP = "Low"; } }else{ if(Avg ERC>=49){ SFP = "High"; }else if(Avg ERC>=42) SFP = "Moderate"; }else{ SFP = "Low"; } $$