CNRFC - Ensemble Products

Short-Range Products (hourly timestep)

Long-Range Products (daily timestep)

Back to Ensemble Products Map

Location:

<<< Previous Ensemble Location (RROC1) | Next Ensemble Location (APCC1) >>>

NAPA RIVER - SAINT HELENA (SHEC1)

Latitude: 38.51º N	Longitude: 122.45º W	Elevation: 195 Feet
Location: Napa County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Dec 07, 2023 at 2:08 PM PST

Monitor Stage: 16.0 Feet

Flood Stage: 18.0 Feet

Please Note:

Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.

Threshold Exceedance Plot Product Information

CSV Ensemble File Download (Data in feet): SHEC1

Select Threshold to Use:

Monitor Stage Flood Stage Custom Threshold

Threshold Value: Threshold Label:

Show:

		Official Forecast (Deterministic)

		Prob. of Threshold Exceedance
		Model Traces

What information is considered in this forecast?

Verification / Historical Plots
<-- Previous Forecast	Forecast Date: Forecast Cycle:

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Impacts - E19 Information
16.0 Feet	Monitor Stage. WFO Monterey/San Francisco Bay Area may issue a Flood Watch to cover Napa Valley region flood potential at this stage.
18.0 Feet	Flood Stage. Minor flooding of low lying agricultural areas along river begins. Low lying rural residential areas immediately adjacent to the river and some secondary roads affected.
20.0 Feet	Moderate flooding of the lower portions of Silverado Trail along the reach. Inundation of low lying residential areas along the east river bank in the vicinity of Pope Street Bridge. Secondary and many primary roads inundated. Most major cross roads inundated and unsafe.
22.0 Feet	Major flooding throughout the upper Napa Valley with most roads inundated, making travel extremely difficult and unsafe.
24.0 Feet	Disastrous flooding. Widespread flooding across the upper Napa Valley with travel essentially impossible. The peak water level during the flood of 12/31/2005 measured 23.6 feet.

Official 7 Day National Weather Service Forecast (CAZ506)

Today: Sunny. Patchy fog and frost in the morning. Highs in the mid 50s to lower 60s. Northwest winds 5 to 15 mph.

Tonight: Mostly clear. Areas of frost after midnight. Lows in the upper 20s to lower 40s. Northwest winds 5 to 15 mph.

Saturday: Sunny in the morning then becoming partly cloudy. Areas of frost in the morning. Highs in the mid 50s to lower 60s. Northeast winds up to 5 mph and becoming southeast in the afternoon.

Saturday Night: Mostly cloudy. Areas of frost after midnight. Lows in the lower 30s to mid 40s. Northeast winds up to 5 mph.

Sunday: Mostly cloudy. Highs in the 50s to mid 60s. Northeast winds up to 5 mph and becoming northwest around 5 mph in the afternoon.

Sunday Night: Partly cloudy. Lows in the mid 30s to upper 40s.

Monday: Partly cloudy in the morning then becoming sunny. Highs in the upper 50s to mid 60s.

Monday Night through Tuesday Night: Mostly clear. Lows in the mid 30s to upper 40s. Highs in the 50s to upper 60s.

Wednesday through Thursday: Partly cloudy. Highs in the 50s to mid 60s. Lows in the 30s to mid 40s.

NWS RSS Feed