A powerful atmospheric river storm is set to hit Southern California, raising concerns of life-threatening floods and landslides. This comes as the state is still recovering from a previous deluge.
Intensity and Forecast
- Gradual intensification of rain is expected to begin on Saturday.
- The most intense downpours are forecasted for a 300-mile stretch of coast on Sunday and Monday (February 5).
- Flash-flood watches have been issued for the entire region, with staggering precipitation expected over a 36-hour period, accompanied by strong winds.
Rainfall Projections
- Averaging 3–6 inches (7-15 cm) of rainfall forecasted for coastal and valley areas.
- Foothills and lower-elevation mountains may experience 6–12 inches of rainfall.
Increased Flood Risk
- Saturated soil and high stream levels from the previous storm increase the flood potential.
- The National Weather Service advises residents to prepare for a major flooding event.
Specific Threats and Vulnerabilities
- Mountainous parts of Santa Barbara and Ventura counties may experience up to 15 inches (38 cm) of rainfall.
- South-facing slopes of mountains and foothills are most vulnerable to flash floods, mudflows, and landslides.
- Areas affected by recent wildfires are at a higher risk of washouts.
Local Preparations and Impacts
- In Los Angeles, the storm coincides with the Grammy Awards show on Sunday, prompting organizers to set up large tents for the red carpet procession.
- Sandbagging and storm drain clearing efforts are underway in various communities.
- Flash-flood watches are also in effect for a narrow stretch of California’s Central Coast and the San Francisco Bay Area.
Ski Areas and Snowfall
- Ski areas anticipate significant snowfall, with 2–4 feet (60-120 cm) expected in higher-elevation mountains.
- The storm is beneficial for rebuilding the region’s snowpack, a key freshwater source.
Past Incidents and Atmospheric Rivers
- The storm is part of a series of atmospheric river storms, similar to those experienced last winter.
- Southern California remains the focal point of flood risks.
- The storms, forming from airborne currents of dense moisture, are also referred to as “Pineapple Express.”
Multiple-Choice Questions (MCQs) with Answers:
- What is the primary threat posed by the upcoming atmospheric river storm in Southern California?
- a) Wildfires
- b) Earthquakes
- c) Floods and landslides
- d) Tornadoes
- What is the expected duration of intense precipitation in the region?
- a) 12 hours
- b) 24 hours
- c) 36 hours
- d) 48 hours
- What measures does the National Weather Service recommend for residents in the affected areas?
- a) Evacuate immediately
- b) Prepare for a major flooding event
- c) Ignore the warnings
- d) Stay outdoors during the storm
- Which areas are most vulnerable to potential flash floods, mudflows, and landslides?
- a) Coastal areas
- b) Mountainous regions
- c) Urban centers
- d) Deserts
- What is the primary benefit of the storm for ski areas?
- a) Increased risk of avalanches
- b) Heavy rainfall for snow
- c) Rebuilding the snowpack
- d) Closure of ski resorts