November 20, 2024
As the Pacific Northwest continues to grapple with the aftermath of a devastating bomb cyclone, communities are bracing for more impacts in the coming days. Southern Oregon and the greater Northwest region face significant changes to river conditions, including rising water levels, flooding, and increased debris. Here’s a closer look at what to expect.
The Current Situation
The bomb cyclone delivered torrential rain and winds up to 75 mph, causing power outages, structural damage, and life-threatening conditions across the region. Rivers across the Northwest, especially in southern Oregon, are already showing signs of stress as they handle the storm’s overwhelming runoff.
Key Rivers to Watch:
- Rogue River: Rapidly rising water levels are expected to approach flood stage in certain areas, including Grants Pass and Agness. Tributaries like Bear Creek are also at risk of spilling over.
- Applegate River: Forecasted to rise sharply due to heavy rainfall in its watershed.
- Illinois River: Already near capacity, the Illinois River is a critical concern for rural areas and low-lying communities.
Forecast for the Coming Days
Wednesday, November 20 – Friday, November 22
- Rainfall Continues: Heavy rain will persist through Thursday, adding several inches of precipitation to already saturated ground.
- Flood Risk Peaks: Rivers are expected to crest between Thursday evening and Friday morning, particularly in southern Oregon.
- High Winds: Gusts may down more trees and power lines, further complicating cleanup efforts.
Weekend Outlook (November 23 – 24)
- Rain Eases: By Saturday, rainfall should taper off to intermittent showers, allowing river levels to stabilize.
- Colder Weather: Cooler temperatures will slow snowmelt in higher elevations, reducing additional runoff into rivers.
- Lingering High Water: Rivers will remain elevated, with some areas experiencing minor flooding into early next week.
What to Expect From Our Rivers
Flooding
Flood-prone areas along the Rogue, Applegate, and Illinois Rivers are at high risk over the next 48 hours. Communities near riverbanks and in low-lying zones should prepare for potential evacuations if conditions worsen.
Debris and Sediment
With the storm’s intensity, expect rivers to carry increased sediment and debris, including tree limbs, rocks, and even larger objects dislodged by landslides. These conditions can:
- Obstruct waterways, creating hazards for recreational users.
- Alter river channels and bank stability.
- Impact water quality, harming fish and aquatic habitats.
Ecosystem Stress
Rivers in southern Oregon, particularly those supporting salmon and steelhead, may experience disruptions to spawning cycles. High sediment loads can bury gravel beds, making it harder for fish to reproduce successfully.
What This Means for the Community
For Residents
- Flood Preparedness: Secure important belongings and monitor alerts from the National Weather Service and local emergency management offices.
- Travel Safety: Avoid driving through flooded roads and stay clear of riverbanks, which may be unstable due to erosion.
- Power Outages: Prepare for extended outages in areas where flooded rivers may impact electrical infrastructure.
For River Recreation
Fishing, boating, and other river activities should be postponed until conditions stabilize. Debris-laden and fast-moving water can pose life-threatening hazards.
For the Environment
Conservation efforts may be needed post-storm to restore river health. Local organizations and agencies will likely assess damage to ecosystems and infrastructure once the waters recede.
Looking Ahead
The next few days will be critical as rivers respond to the bomb cyclone’s deluge. While the worst of the storm has passed, its aftermath will continue to affect communities and ecosystems across the Northwest.
How to Stay Updated
- National Weather Service River Forecasts: https://www.weather.gov/erh/mmefs
- Oregon Water Resources Department: https://www.oregon.gov/owrd
Stay informed, stay safe, and let’s work together to minimize the storm’s impact on our rivers and communities.
