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Preparing Your Central Coast Home for Winter Storms
Updated: 2 days ago
Most of a Central Coast winter is the best-kept secret of living here: green hills, empty beaches, clear cold mornings after the rain. Then an atmospheric river lines up on the coast, drops a season's worth of water in a few days, and every creek from Arroyo Grande to Paso Robles remembers it is a creek.
The homes that come through those storms fine are not lucky. They are the ones somebody walked around in October. This is what we tell clients to do to ready a Central Coast home for winter storms before the first real front of the year.
START WITH A WALK IN THE RAIN
Know how water moves around your house
Start with a walk in the rain, or right after one. Where does water pool? Which direction does the driveway drain?
Where do the downspouts dump, and where does that water go next? Every property has a drainage story, and on the Central Coast three settings each have their own version.
Hillside homes in San Luis Obispo, Arroyo Grande, Avila Valley, Cambria, and above Atascadero deal with runoff from above. Water arriving from an uphill neighbor's yard, a slope, or a street can overwhelm a side yard and find its way into a crawl space. Hillside lots also carry the risk of saturated soil moving, which is why a geologic report is part of due diligence on steeper lots.
Flat and low homes near creeks, in Oceano, parts of Grover Beach, the older sections of Arroyo Grande and SLO near their creeks, and along the Salinas River in North County can see water rise rather than run. Some of these areas are in mapped flood zones, which we cover in flood zones in SLO County.
Rural homes on acreage deal with everything at once: long driveways that wash out, culverts that clog, private roads that turn to mud, and the possibility of being cut off for a day when a low-water crossing runs high.
Once you know your house's story, the checklist writes itself.
BEFORE THE RAINS
The fall checklist
SALT AND WIND · LEAF DROP · DOWNSPOUTS
Roof and gutters
Have the roof looked at before the rains, especially on the coast, where salt and wind loosen things as described in salt air and your home. Clear the gutters, then clear them again after the first oak leaf drop or pine needle fall. Make sure downspouts extend away from the foundation and discharge somewhere that drains, not onto a walkway that sends water straight back to the house.
YARD DRAINS · SWALES · CULVERTS
Drains, swales, and culverts
Clean every yard drain, area drain, and French drain inlet. Walk the swales and make sure they are not blocked by mulch or a new planter. On rural property, find every culvert under the driveway and the road and clear both ends. A clogged culvert is the most common cause of a washed-out rural driveway in this county.
SLOPE AWAY ON ALL SIDES
Grading around the foundation
Soil should slope away from the house on all sides. Years of mulch and settled beds can reverse that without anyone noticing. Fix it with a rake before the storm, not with a pump during it.
STANDING WATER · SUMP PUMP · BATTERY BACKUP
Crawl space and sump
If the house has a crawl space, look in it now. Standing water or dampness in October means the drainage plan needs work. If there is a sump pump, test it and consider a battery backup, because the power tends to go out during the same storms that fill the sump.
EUCALYPTUS · MONTEREY PINE · HEAVY OAK LIMBS
Trees
Winter wind in a saturated soil is when trees come down. Have any large tree near the house, the driveway, or the power line evaluated, and remove dead limbs. Eucalyptus and Monterey pines are the usual suspects on the coast; oaks with heavy horizontal limbs deserve a look inland. Cambria and Los Osos see the most tree damage in a typical storm year.
CAULKING · FLASHING · DECK LEDGERS
Windows, doors, and decks
Check the caulking and flashing on windward windows and doors. Look at deck ledgers where they meet the house; water intrusion there is a common Central Coast inspection finding. Bring in or secure furniture, umbrellas, and anything that becomes a projectile in a south wind.
BURNED SLOPES · DEBRIS · THE FIRST BIG STORM
Fire follow-up
If a fire burned upslope of you in the last year or two, the ground above you sheds water and debris far faster than before. Talk to the county about mitigation, and take the first big storm seriously.
POWER · WATER AND FOOD · WELL PUMPS
Getting through the storm itself
The Central Coast's big storms tend to arrive with warning, often days of it. Use the time.
Power. Outages are routine in winter, and can be long in rural areas. Charge devices, fill the car, know where the flashlights are, and test the generator if you have one. Rural well owners: no power means no water, so fill a few containers. Our well checklist covers backup power for the pump.
Water and food for a couple of days, in case a road washes out.
Sandbags, if you know water reaches a specific door or garage. Many fire stations and public works yards in the county make sand and bags available before major storms; check the county's announcements.
Roads. Highway 1 north of Cambria closes for slides in serious winters, sometimes for months. Highway 41, Highway 46, and the Cuesta Grade see slides and closures too, and low-water crossings on rural roads become impassable quickly. Do not drive through moving water on any Central Coast road; it is the one rule that actually gets people hurt here.
Creek watch. If you live near San Luis Obispo Creek, Arroyo Grande Creek, the Salinas River, or any of their tributaries, keep an eye on the county's flood alerts and be ready to move vehicles to higher ground.
Insurance. Know what your policy covers. Standard homeowners insurance does not cover flood; that is a separate policy, and mudflow and slide coverage is its own conversation. Confirm the details with your insurer before you need them. The broader picture is in homeowners insurance on the Central Coast: beyond fire.
BEFORE THE NEXT FRONT
After the storm
Walk the property again. Check the crawl space, the roof from the ground, the culverts, and the base of the slope. Photograph any damage before you clean it up. Clear the drains before the next front, because Central Coast storms often arrive in a series.
And then go outside, because the day after a big winter storm here, with the hills bright green and the air scrubbed clean, is one of the finest days of the year.
Winter is not the hard season on the Central Coast. It is the season that rewards the ten things you did in October.
Your next step
Put a two-hour walk-around on your calendar for a weekend in October and take this list with you. If you are buying a home this winter, tell us what you see on the property during the rain, because a storm is the best inspection a house ever gets. And if you want to understand how the drainage and hillside issues on a specific listing compare to others in the same town, we do that analysis as part of every showing, and our property search is the place to start pulling candidates.
Talk With Kim & Kristen
We are Kim San Jule and Kristen Gentry, Broker Associates with Real Broker, serving San Luis Obispo County and the Central Coast. Whether you are buying, selling, or simply thinking ahead, we are glad to be a resource.
Kim San Jule · Broker Associate, DRE 01948144 · 805-345-8303 · kimsanjule@gmail.com
Kristen Gentry · Broker Associate, DRE 01968754 · 805-441-4618 · kristengentryslo@gmail.com
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