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| MIDDLE FORK FEATHER RIVER - PORTOLA (MFTC1) | ||||||||||||||||||
| Latitude: 39.82º N | Longitude: 120.44º W | Elevation: 4850 Feet | ||||||||||||||||
| Location: Plumas County in CA | ||||||||||||||||||
| River Group: Lower Sacramento | ||||||||||||||||||
| Issuance Time: | May 10 2025 at 7:59 AM PDT |
| Please Note: | Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty. |
| 10-Day Probability Plot |
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ071) |
| Today: Partly cloudy in the morning then becoming sunny. Highs 75 to 85. Light winds becoming southwest 15 to 20 mph with gusts up to 35 mph in the afternoon. Tonight: Clear. Lows 40 to 50. Southwest winds 10 to 15 mph. Gusts up to 40 mph in the evening. Sunday: Sunny. Highs 63 to 73. Southwest winds around 10 mph increasing to 20 to 30 mph with gusts up to 50 mph in the afternoon. Sunday Night: Partly cloudy. Chance of showers after midnight. Lows 33 to 43. Southwest winds 20 to 30 mph with gusts up to 50 mph decreasing to 10 to 15 mph with gusts up to 30 mph after midnight. Monday: Chance of showers in the morning, then showers likely and slight chance of thunderstorms in the afternoon. Snow level 5500 feet. Highs 49 to 59. Southwest winds 10 to 15 mph. Gusts up to 35 mph in the afternoon. Monday Night: Mostly cloudy. Chance of showers and thunderstorms in the evening, then slight chance of showers after midnight. Lows 28 to 38. Tuesday: Mostly cloudy. Slight chance of snow showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs 52 to 62. Tuesday Night through Wednesday Night: Partly cloudy. Lows 30 to 40. Highs 57 to 67. Thursday: Sunny. Highs 65 to 75. Thursday Night and Friday: Partly cloudy. Lows 37 to 47. Highs 67 to 77. |
| Flood Impacts | |
| 4,856.5 Feet | Major to near record flooding. Major damages to transportation, homes and businesses. Similar to January 1997, and in excess of February 9, 2017. Potential for rapid rises and major impacts from tributary streams. Tributary impacts may significantly proceed main-stem peak flows. |
| 4,855.5 Feet | Major Flood Stage. Major disruptions to transportation with significant impacts to homes and businesses between Beckworth and Clio. Approaching levels of February 9, 2017. Potential for rapid rises and major impacts from tributary streams. Impacts below Portola influenced by magnitude of tributary flows, especially Sulphur Creek. Tributary impacts may significantly proceed main-stem peak flows. |
| 4,854.5 Feet | Moderate flooding of businesses, homes, structures, and roads, including Highway 89 near Clio, portions of Highway 70, and low lying homes from Beckwourth to Clio. Impacts below Portola influenced by magnitude of tributary flows, especially Sulphur Creek. |
| 4,854.0 Feet | Moderate flooding of lowlands, roads, homes, businesses and structures along river from Beckwourth to Clio. Lowest homes on West Street begin to flood. Impacts below Portola influenced by magnitude of tributary flows, especially Sulphur Creek. Similar level to February 22nd, 2017, and slightly exceeding flooding of January 9, 2017. |
| 4,853.5 Feet | Moderate Flood Stage. Flooding of lowlands, structures, and roads from Beckwourth to Clio. Several low lying structures along river in Portola flood. Evacuation of homes on south end of West Street may be necessary. Highway 89 near Clio likely flooded. Impacts below Portola influenced by magnitude of tributary flows, especially Sulphur Creek. Similar level to 1/9/2017. |
| 4,853.0 Feet | Minor flooding of lowlands, roads, and low-lying structures between Beckwourth to Clio. In Portola the lowest lying buildings and businesses on highway 70 may begin to experience some minor flooding. Water along West Street nearing lowest homes along river. Highway 89 near Clio likely flooded. Potential for greater impacts in the lower portion of the reach with large contribution from tributary creeks. Similar level to 3/23/2018. |
| 4,852.5 Feet | Flood stage. Minor flooding of lowlands, rural roads, agricultural areas, and some low structures between Beckwourth and Clio. In Portola, water nearing lowest lying businesses along Highway 70 on west edge of Portola. The south end of West Street in Portola floods. Portions of Highway 89 near Clio may begin to flood. Potential for greater impacts in the lower portion of the reach with large contribution from tributary creeks. Similar level to March 17, 2011. |
| 4,852.0 Feet | Limited minor lowland flooding between Beckwourth and Clio. Potential for road impacts near Clio with large contribution from tributary creeks. |
| 4,851.0 Feet | Monitor Stage. Some areas of very minor out of bank flow between Beckwourth and Clio. |