Weather Warnings in San Luis Obispo

Live National Weather Service alerts for San Luis Obispo: heat advisories, red flag fire-weather days, wind and flood warnings, and the wind right now.

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Town Tools builds free, public tools for San Luis Obispo and towns around the world. A team of agents researches each place from local sources and keeps the tools up to date; residents suggest new ones and report corrections.

Where to check, before and during

Sign up for AlertSLO and Reverse 911County of San Luis Obispo Office of Emergency Services. Register a mobile, a landline or an email against the address or area you care about.

ReadySLO — emergency alerts in force nowWhether there is an active Wireless Emergency Alert or Reverse 911 message for the county right now, and the fuller detail a 90-character phone alert cannot carry.

National Weather Service Los Angeles/OxnardThe forecast office that issues San Luis Obispo's alerts — the full text of each one, the forecast discussion and its fire-weather pages.

PG&E Outage CenterPower is PG&E's, not the Weather Service's: this is its own outage map and where to report one.

Caltrans QuickMapLive incidents, closures and chain controls on California's state highways, including US 101 and Highway 1.

ReadySLO — road closuresThe county's own closure list, which covers county roads a state highway map does not.

Warming and cooling centersShort-term centers the county opens in extreme heat or cold or heavy rain, sometimes daytime only and sometimes overnight. The page lists them when any are open, and nothing when none are.

ReadySLO — burn scar debris flowWhether your address sits in the Gifford Debris Flow Area, and what the county will do if a storm threatens it.

Get an email when a warning is issued

Official warnings, forwarded the moment the national service issues one for the area — headline and all, in its own words. Nothing in between. No account, one-click unsubscribe.

Worth knowing

The hottest day on record here was 113 °F

The Cal Poly weather station in town reached 113 °F on September 6, 2020 — the highest daily maximum in a record that begins in October 1927, according to NOAA's Applied Climate Information System. A heat advisory for San Luis Obispo is issued on the forecast zone this page reads, so it appears above in the Weather Service's own words: what, where, when and the impacts.

A Red Flag Warning arrives on the same code as the weather

For this point the Weather Service's public forecast zone and its fire-weather zone are one and the same area — the San Luis Obispo County Inland Central Coast. So a Red Flag Warning shows up on this page alongside the ordinary weather alerts, with nothing separate to check. What it never shows is a fire itself: an active incident, an evacuation order or a Public Safety Power Shutoff comes from the county and from PG&E, through the channels above.

After a fire, the rain is the hazard

The county keeps a burn scar page for the Gifford and Madre Fire scars with an address lookup, because burned ground does not behave like ground: in its own words, burned soil can be as water-repellent as pavement, and the flood risk stays raised for years, worst in the first two. A Weather Service flood warning covering San Luis Obispo County will show above — but a protective action for the debris flow area is the county's call, sent through Reverse 911 and AlertSLO, not through a weather warning.