National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.


SACRAMENTO RIVER - SHASTA LAKE (SHDC1)
Latitude: 40.72º NLongitude: 122.42º WElevation: 1070 Feet
Location: Shasta County in CaliforniaBulletin Group: Upper SacramentoRiver Group: Upper Sacramento
Issuance Time: Jun 21, 2025 at 12:05 PM PDT
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.
2025 Water Year Accumulated Volume PlotCSV Ensemble Files (Data in kcfs):  Forecast Group  |  SHDC1

Tabular Monthly Volume Accumulation (1000s of Acre-Feet)
Probability Nov 1
2024
Dec 1
2024
Jan 1
2025
Feb 1
2025
Mar 1
2025
Apr 1
2025
May 1
2025
Jun 1
2025
Jul 1
2025
Aug 1
2025
Sep 1
2025
Oct 1
2025
10% -- -- -- -- -- -- -- -- 6080 6310 6530 6730
25% -- -- -- -- -- -- -- -- 6080 6310 6520 6720
50%
(Median)
-- -- -- -- -- -- -- -- 6080 6310 6520 6720
75% -- -- -- -- -- -- -- -- 6080 6310 6520 6710
90% -- -- -- -- -- -- -- -- 6080 6310 6520 6710

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ013)
Tonight: Partly cloudy in the evening then clearing. Lows 36 to 51 higher elevations and 44 to 55 lower elevations. Prevailing north winds up to 15 mph with gusts to around 30 mph.

Sunday: Sunny, warmer. Highs 65 to 80 higher elevations and 78 to 86 lower elevations. Prevailing northeast winds up to 10 mph with gusts to around 25 mph.

Sunday Night: Mostly clear. Lows 46 to 61 higher elevations and 54 to 66 lower elevations. Prevailing north winds up to 10 mph with gusts to around 25 mph.

Monday: Sunny, warmer. Highs 74 to 89 higher elevations and 86 to 94 lower elevations. Prevailing northeast winds up to 10 mph.

Monday Night: Mostly clear. Lows 50 to 65. Light winds becoming north up to 10 mph after midnight.

Tuesday: Sunny, warmer. Highs 79 to 94.

Tuesday Night: Clear. Lows 51 to 66.

Wednesday: Sunny. Highs 79 to 94.

Wednesday Night and Thursday: Mostly clear. Lows 52 to 67. Highs 79 to 94.

Thursday Night through Friday Night: Clear. Lows 55 to 70. Highs 81 to 96.

Saturday: Sunny, warmer. Highs 87 to 102.