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| HUASNA RIVER - ARROYO GRANDE (HSAC1) | ||||||||||||||||||
| Latitude: 35.08º N | Longitude: 120.37º W | Elevation: 1000 Feet | ||||||||||||||||
| Location: San Luis Obispo County in CA | ||||||||||||||||||
| River Group: Southern California | ||||||||||||||||||
| Issuance Time: | Jan 10 2026 at 8:34 AM PST |
| Please Note: | Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty. Flow data on this product are unregulated / full natural flow. |
| Monthly Probability Plot |
| Monthly Streamflow Volume (1000s of Acre-Feet) Data Updated: Jan 10 2026 at 8:47 AM PST | ||||||
| Prob | Jan* | Feb | Mar | Apr | May | Jun |
| 10% | 9.7 | 17.7 | 20.0 | 4.2 | 1.1 | 0.4 |
| 25% | 5.4 | 6.7 | 8.0 | 2.1 | 0.9 | 0.2 |
| 50% | 4.4 | 0.9 | 1.6 | 0.7 | 0.3 | 0.0 |
| 75% | 4.4 | 0.6 | 0.4 | 0.2 | 0.1 | 0.0 |
| 90% | 4.4 | 0.6 | 0.4 | 0.2 | 0.1 | 0.0 |
| Mean | + | + | + | + | + | + |
| %Mean | + | + | + | + | + | + |
| Prob | Jul | Aug | Sep | Oct | Nov | Dec |
| 10% | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.6 |
| 25% | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.2 |
| 50% | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 |
| 75% | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| 90% | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Mean | + | + | + | + | + | + |
| %Mean | + | + | + | + | + | + |
| Note 1: %Mean is the "Median forecast monthly value (50%)" divided by the "monthly mean" (displayed as a %) | ||||||
| Note 2: For current month, graphic represents remaining forecast only, text represents observed + remaining forecast. | ||||||
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ342) |
| Tonight: Partly cloudy in the evening then mostly cloudy. Lows in the 30s to around 40 except the mid 40s to around 50 warmer hills. Northeast winds 15 to 25 mph. Sunday: Partly cloudy. Highs in the upper 50s and 60s. Northeast winds 15 to 25 mph. Sunday Night: Mostly clear. Lows in the mid 30s to lower 40s except the mid 40s to around 50 warmer hills. Northeast winds around 15 mph. Monday: Sunny. Highs in the 60s to around 70. Northeast winds around 15 mph. Monday Night: Clear. Lows in the upper 30s and 40s. Northeast winds 15 to 25 mph. Tuesday: Sunny. Highs in the mid 60s to mid 70s. Tuesday Night: Clear. Lows in the 40s to around 50. Wednesday: Sunny. Highs in the mid 60s to mid 70s. Wednesday Night: Clear. Lows in the mid 40s to lower 50s. Thursday: Sunny. Highs in the upper 60s to mid 70s. Thursday Night: Mostly clear. Lows in the mid 40s to mid 50s. Friday: Sunny. Highs in the upper 60s to mid 70s. Friday Night: Partly cloudy in the evening then mostly clear. Lows in the mid 40s to mid 50s. Saturday: Partly cloudy in the morning then sunny. Highs in the mid 60s to mid 70s. |