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.
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SAN TIMOTEO CREEK - LOMA LINDA (TIMC1)
Latitude: 34.06º NLongitude: 117.27º WElevation: 1010 Feet
Location: San Bernardino County in CaliforniaBulletin Group: Southern CaliforniaRiver Group: Southern California
Issuance Time: Jun 20 2025 at 11:23 AM PDTNext Issuance: Jun 21 2025 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View US Geological Survey (USGS) Data for this station location.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ048)
Tonight: Mostly clear this evening and becoming partly cloudy. Cooler. Lows 47 to 57. Areas of winds south 10 to 15 mph. Gusts to 30 mph this evening.

Saturday: Partly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 77 to 82. Areas of winds south 10 to 20 mph. Gusts to 25 mph and becoming 30 mph in the afternoon.

Saturday Night: Mostly clear in the evening and becoming partly cloudy overnight with patchy fog. Lows 47 to 56. Areas of winds southwest 10 to 15 mph with gusts to 30 mph becoming south overnight.

Sunday: Partly cloudy in the morning and becoming sunny. Highs 82 to 88. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.

Sunday Night: Mostly clear. Lows 48 to 56. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.

Monday: Partly cloudy in the morning and becoming mostly sunny. Highs 81 to 86.

Monday Night: Mostly clear. Lows 48 to 55.

Tuesday: Partly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 80 to 87.

Tuesday Night: Mostly clear. Lows 51 to 57.

Wednesday: Partly cloudy in the morning and becoming sunny. Highs 86 to 93.

Wednesday Night: Mostly clear. Lows 55 to 60.

Thursday: Partly cloudy in the morning and becoming mostly sunny. Highs 89 to 96.

Thursday Night: Mostly clear. Lows 57 to 62.

Friday: Partly cloudy in the morning and becoming mostly sunny. Highs 90 to 97.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS San Diego Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.