Results
Scores from the 2018 WGI Percussion / Winds Power Regional at Coussoulis Arena.
FINALS - Sunday, March 25
| Scholastic Marching A | ||
| 1 | Amador Valley HS (Pleasanton, California) | 88.338 |
| 2 | Temple City HS (Temple City, California) | 88.175 |
| 3 | Carlsbad HS (Carlsbad, California) | 85.900 |
| 4 | Chaffey HS (Ontario, California) | 83.775 |
| 5 | West Ranch HS (Stevenson Ranch, California) | 83.750 |
| 6 | Gilbert HS (Gilbert, Arizona) | 83.300 |
| Independent Marching A | ||
| 1 | Vegas Vanguard (Las Vegas, Nevada) | 87.725 |
| 2 | Watchmen Percussion (Riverside, California) | 82.475 |
| 3 | Calgary Stampede Showband Indoor Percussion (, Canada) | 82.400 |
| 4 | Pinnacle Percussion (Phoenix, Arizona) | 78.650 |
| 5 | Pace Percussion Ensemble (, California) | 77.200 |
| 6 | Cornerstone Percussion (San Diego, California) | 74.750 |
| Score | ||
| Scholastic Marching Open | ||
| 1 | La Quinta HS (Westminister, California) | 89.575 |
| 2 | Fountain Valley HS (Fountain Valley, California) | 89.238 |
| 3 | Great Oak HS (Temecula, California) | 88.825 |
| 4 | Casa Grande HS (Casa Grande, Arizona) | 87.725 |
| 5 | Arcadia HS (Arcadia, California) | 87.075 |
| 6 | El Dorado HS (Placentia, California) | 84.338 |
| 7 | Foothill HS (NV) (Henderson, Nevada) | 82.313 |
| 7 | Ridgeview HS (Bakersfield, California) | 82.313 |
| 9 | Granada Hills Charter HS (Granada Hills, California) | 81.325 |
| 10 | Cupertino HS (Cupertino, California) | 80.000 |
| 11 | Los Gatos HS (Los Gatos, California) | 79.900 |
| Independent Marching Open | ||
| 1 | Bakersfield College (Bakersfield, California) | 90.850 |
| 2 | Red Wave Indoor (Fresno, California) | 87.075 |
| 3 | Breakthrough Indoor Percussion (Phoenix, Arizona) | 86.638 |
| 4 | Vision Percussion (Gilbert, Arizona) | 85.175 |
| 5 | Odyssey Indoor Percussion (Costa Mesa, California) | 82.475 |
| 6 | Elan Percussion (Covina, California) | 81.225 |
| 7 | Impact Percussion UT (Springville, Utah) | 81.125 |
| 8 | Velocity Independent (Corona, California) | 78.825 |
| Score | ||
| Scholastic Marching World | ||
| 1 | Chino Hills HS (Chino Hills, California) | 92.625 |
| 2 | Arcadia HS (Arcadia, California) | 90.700 |
| 3 | Ayala HS (Chino Hills, California) | 89.513 |
| 4 | Etiwanda HS (Rancho Cucamonga, California) | 89.300 |
| 5 | San Marino HS (San Marino, California) | 84.288 |
| 6 | Homestead HS (Cupertino, California) | 83.675 |
| 7 | Rowland HS (Rowland Heights, California) | 83.625 |
| 8 | Diamond Bar HS (Diamond Bar, California) | 82.750 |
| 9 | Vista Murrieta HS (Murrieta, California) | 82.700 |
| Independent Marching World | ||
| 1 | Broken City (Lake Elsinore, California) | 92.788 |
| 2 | Pulse Percussion (Westminster, California) | 92.000 |
| 3 | RCC (Riverside, California) | 91.850 |
| 4 | POW Percussion (El Monte, California) | 88.325 |
| 5 | Dark Sky Percussion (Long Beach, California) | 86.625 |
| 6 | Vessel (Costa Mesa, California) | 82.925 |
| Scholastic Concert A | ||
| 1 | William Workman HS (City of industry, California) | 89.050 |
| 2 | St. Genevieve HS (Panorama city, California) | 85.450 |
| 3 | West Ranch HS (Stevenson ranch, California) | 83.550 |
| 4 | Madera HS (Madera, California) | 79.850 |
| Score | ||
| Scholastic Concert Open | ||
| 1 | La Quinta HS (Westminster, California) | 90.450 |
| 2 | Etiwanda HS (Rancho Cucamonga, California) | 86.600 |
| 3 | Notre Dame HS (Sherman oaks, California) | 86.250 |
| 4 | Martin Luther King HS (Riverside, California) | 79.500 |
| Score | ||
| Scholastic Concert World | ||
| 1 | Ayala HS (Chino Hills, California) | 90.775 |
| 2 | Woodbridge HS (Irvine, California) | 89.500 |
| 3 | Rowland HS (Rowland Heights, California) | 85.800 |
| Scholastic A Winds | ||
| 1 | Whittier HS (Whittier, California) | 78.750 |
| Independent A Winds | ||
| 1 | Valley Christian Performing Indoor Ensemble (San Jose, California) | 85.650 |
| Score | ||
| Scholastic Open Winds | ||
| 1 | La Quinta HS (Westminster, California) | 81.450 |
PRELIMS - Saturday, March 24
| Scholastic Marching Open | ||
| 1 | Fountain Valley HS (Fountain Valley, California) | 88.950 |
| 2 | Great Oak HS (Temecula, California) | 88.550 |
| 3 | Casa Grande HS (Casa Grande, Arizona) | 87.075 |
| 4 | La Quinta HS (Westminister, California) | 86.350 |
| 5 | San Marino HS (San Marino, California) | 86.125 |
| 6 | Arcadia HS (Arcadia, California) | 84.275 |
| 7 | Ridgeview HS (Bakersfield, California) | 83.925 |
| 8 | Foothill HS (NV) (Henderson, Nevada) | 83.475 |
| 9 | El Dorado HS (Placentia, California) | 83.100 |
| 10 | Cupertino HS (Cupertino, California) | 82.650 |
| 11 | Granada Hills Charter HS (Granada Hills, California) | 82.250 |
| 12 | Los Gatos HS (Los Gatos, California) | 81.000 |
| 13 | Independence HS (Bakersfield) (Bakersfield, California) | 80.750 |
| 14 | Sunny Hills HS (Fullerton, California) | 79.250 |
| 15 | Chino HS (Chino, California) | 77.950 |
| 16 | Williams Field HS (Gilbert, Arizona) | 76.850 |
| Independent Marching Open | ||
| 1 | Bakersfield College (Bakersfield, California) | 88.100 |
| 2 | Vision Percussion (Gilbert, Arizona) | 84.850 |
| 3 | Red Wave Indoor (Fresno, California) | 83.800 |
| 4 | Breakthrough Indoor Percussion (Phoenix, Arizona) | 82.700 |
| 5 | Elan Percussion (Covina, California) | 82.450 |
| 6 | Impact Percussion UT (Springville, Utah) | 82.100 |
| 7 | Odyssey Indoor Percussion (Costa Mesa, California) | 81.750 |
| 8 | Velocity Independent (Corona, California) | 78.800 |
| 9 | Weber State Indoor Percussion (Ogden, Utah) | 77.250 |
| 10 | NorCal Indoor (Sacramento, California) | 74.850 |
| Score | ||
| Scholastic Marching World | ||
| 1 | Chino Hills HS (Chino Hills, California) | 94.250 |
| 2 | Arcadia HS (Arcadia, California) | 89.550 |
| 3 | Ayala HS (Chino Hills, California) | 88.900 |
| 4 | Etiwanda HS (Rancho Cucamonga, California) | 88.600 |
| 5 | Rowland HS (Rowland Heights, California) | 82.950 |
| 6 | Diamond Bar HS (Diamond Bar, California) | 82.600 |
| 7 | Vista Murrieta HS (Murrieta, California) | 82.500 |
| 8 | Homestead HS (Cupertino, California) | 81.750 |
| Independent Marching World | ||
| 1 | Broken City (Lake Elsinore, California) | 92.700 |
| 1 | RCC (Riverside, California) | 92.700 |
| 3 | Pulse Percussion (Westminster, California) | 92.600 |
| 4 | POW Percussion (El Monte, California) | 87.350 |
| 5 | Dark Sky Percussion (Long Beach, California) | 87.250 |
| 6 | Vessel (Costa Mesa, California) | 83.750 |
SEMI FINALS - Saturday, March 24
| Scholastic Marching A | ||
| 1 | Amador Valley HS (Pleasanton, California) | 87.950 |
| 2 | Temple City HS (Temple City, California) | 86.200 |
| 3 | Carlsbad HS (Carlsbad, California) | 85.875 |
| 4 | Gilbert HS (Gilbert, Arizona) | 84.250 |
| 5 | Chaffey HS (Ontario, California) | 83.250 |
| 6 | West Ranch HS (Stevenson Ranch, California) | 82.800 |
| 7 | Westminster HS (Westminister, California) | 81.600 |
| 8 | Enochs HS (Modesto, California) | 80.200 |
| 9 | South Torrance HS (Torrance, California) | 79.300 |
| 10 | Vanden HS (Fairfield, California) | 78.850 |
| 11 | Chaparral HS (Temecula, California) | 77.050 |
| 12 | St. Genevieve HS (Panorama city, California) | 75.200 |