Station Name: TRINITY R AB NF TRINITY R NR HELENA CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 1,404 feet

Nearest Address:
State Rte 299
Helena, CA 96052
Trinity County

GPS Coordinates: 40.76653148, -123.1144757

Nearby Water Temperatures

Winter Storm Warning issued February 18 at 11:38PM PST until February 19 at 10:00AM PST by NWS Eureka CA

Effective: Wed February 18, 2026, 11:38 PM
Expires: Thu February 19, 2026, 7:45 AM

* WHAT...Heavy snow snow levels above 1500 feet. Additional snow accumulations between 2 and 4 inches. * WHERE...Trinity County. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. Road closures are possible. * ADDITIONAL DETAILS...Another cold front will bring additional snow tonight through Thursday morning. The heaviest snowfall rates are expected tonight into Thursday morning. There is the potential for snow level as low as 1000 feet with the heaviest snowfall amounts.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.

Cold Weather Advisory issued February 18 at 11:43PM PST until February 19 at 10:00AM PST by NWS Eureka CA

Effective: Wed February 18, 2026, 11:43 PM
Expires: Thu February 19, 2026, 7:45 AM

* WHAT...Very cold temperatures as low as 22 expected for inland areas. Very cold temperatures as low as 27 expected for coastal areas. * WHERE...Southern Mendocino Interior, Southwestern Humboldt and Mendocino Coast, and Southern Lake. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Very cold temperatures can lead to hypothermia with prolonged exposure.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible.

Winter Storm Warning issued February 18 at 11:38PM PST until February 19 at 6:00AM PST by NWS Eureka CA

Effective: Wed February 18, 2026, 11:38 PM
Expires: Thu February 19, 2026, 6:00 AM

* WHAT...Heavy snow expected. Additional snow accumulations up to 6 inches. Winds gusting as high as 35 mph. * WHERE...Southwestern Humboldt above 2,500 feet. * WHEN...Until 6 AM PST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. * ADDITIONAL DETAILS...Another cold front will bring additional snow tonight through Thursday morning. The heaviest snowfall rates are expected tonight into Thursday morning. There is the potential for snow level as low as 1000 feet with the heaviest snowfall amounts.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.

Winter Storm Warning issued February 18 at 11:38PM PST until February 19 at 10:00AM PST by NWS Eureka CA

Effective: Wed February 18, 2026, 11:38 PM
Expires: Thu February 19, 2026, 7:45 AM

* WHAT...Heavy snow snow levels above 1500 feet. Additional snow accumulations between 3 and 5 inches. * WHERE...Humboldt Interior and Del Norte Interior. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes and road closures are possible. * ADDITIONAL DETAILS...Another cold front will bring additional snow tonight through Thursday morning. The heaviest snowfall rates are expected tonight into Thursday morning. There is the potential for snow level as low as 1000 feet with the heaviest snowfall amounts.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.

Winter Weather Advisory issued February 18 at 11:38PM PST until February 19 at 10:00AM PST by NWS Eureka CA

Effective: Wed February 18, 2026, 11:38 PM
Expires: Thu February 19, 2026, 7:45 AM

* WHAT...Scattered to numerous hail showers tonight through Thursday morning, resulting in ice accumulation and extremely slippery driving conditions. * WHERE...Del Norte and Northern Humboldt Coast. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous due to small hail. Plan on slippery road conditions. The hazardous conditions will impact the Tonight and Thursday morning commutes.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Dark clouds ahead may indicate showers containing small hail. Slow down and allow extra time if driving.