Event Summary:
The SBCUSD Office of Safety and Emergency Management has received an update from the national weather service.
The forecast remains on track for Hurricane Norbert to weaken off the Baja coast on Monday. The storm will begin to impact the region later tonight and continue through Monday. The main threat will be for flash flooding from slow moving thunderstorms. A limiting factor may be the added cloud cover because the main trigger for this activity will be daytime heating. The greatest threat continues over the mountains and deserts each afternoon/evening.
Timing:
Sunday and Monday
Location:
Coachella Valley,High Desert,Inland Empire,Inner Coastal Waters,Orange County Coast,Riverside County Mountains,San Bernardino County Mountains,San Diego County Coast,San Diego County Deserts,San Diego County Mountains,San Diego County Valleys,Santa Ana Mountains and Foothills
Storms/System Intensity:
Moderate to strong (possible areas of impact)
Impacts:
Flash Flooding
Forecaster Confidence:
Moderate to High
Remarks:
The limiting factor will be the extent and thickness of the higher clouds. If the cloud deck is too thick, heating would be reduced and the threat of intense thunderstorms lower. However, even a modest amount of sunshine should result in thunderstorm development. Some overnight and morning showers and thunderstorms are possible as well with dangerous cloud-to-ground lightning strikes.
Before flash flooding:
Listen to the radio or television for information.
If there is any possibility of a flash flood, move immediately to higher ground. Do not wait for instructions to move.
Be aware of stream, drainage channels, canyons and other areas known to flood suddenly. Flash floods can occur in these areas with or without typical warnings such as rain clouds or heavy rain.
If you must prepare to evacuate, you should do the following:
Secure your home. If you have time, bring in outdoor furniture. Move essential items to an upper floor.
Turn off utilities at the main switches or valves if instructed to do so. Disconnect electrical appliances. Do not touch electrical equipment if you are wet or standing in water.
If you have to leave your home, remember these evacuation tips:
Do not walk through moving water. Six inches of moving water can make you fall. If you have to walk in water, walk where the water is not moving. Use a stick to check the firmness of the ground in front of you.
Do not drive into flooded areas. If floodwaters rise around your car, abandon the car and move to higher ground, when water is not moivng or not more than a few inches deep. You and the vehicle can be swept away quickly. If your vehicle is trapped in rapidly moving water, stay in the vehicle. If the water is rising inside the vehicle, seek refuge on the roof.
Do not camp or park your vehicle along streams, rivers or creeks, particularly during threatening conditions.
