Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

System Upgrade

The National Weather Service in Topeka, KS will be conducting a required, scheduled update to their Advanced Weather Interactive Processing system (AWIPS) from June 16nd through June 18th.

During the time of the update, forecasts operations will be conducted by our back-up office in Wichita, KS to minimize any potential interruption to services. No impacts to our core services of forecast products and weather watches, warnings and advisories are expected during this period.

The NWS Topeka (KTWX) radar will remain operational and its products will continue to be distributed as normal. The NWS Topeka office will remain open and staffed at all hours throughout this update period to answer public and partner phone calls, and additional functions that can be completed while our AWIPS is upgraded.

During periods of planned or unplanned outages it is important to have multiple ways to receive warning information. These alternative sources include: local television/radio, and weather apps on your mobile device.

However, limited impacts will occur to the following services:

NOAA Weather Radio Transmitters:

All NOAA Weather Radio Transmitters maintained by NWS Topeka will be off the air through the time of the update. This includes the following transmitters:

Topeka (WXK91 - 162.475 MHz)

Concordia (WXK94 - 162.550 MHz)

Abilene (WXL71 - 162.525 MHz)

Blue Rapids (KZZ67 - 162.425 MHz)

Halls Summit (KGG98 - 162.425 MHz)

AWIPS-dependent products on our web page, weather.gov/topeka: Any graphic or text that relies on our AWIPS for generation and/or distribution will not be available on our web page. An example is

the experimental hazardous weather outlook page

For any questions please email: nws.topeka@noaa.gov

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Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

NWS System Upgrade Service Outages