Heavy Rainfall in Southern California and in the Southern Plains; Heavy Snow in the Sierra Nevada Mountains and Rockies

A Pacific storm will bring coastal/lower elevation heavy to excessive rainfall to southern California and the Southern Rockies today, with localized flash flooding possible, especially near recent burn scars. Heavy snow is forecast over parts of the Sierra Nevada Mountains today and over the Northern Rockies on Wednesday. Several inches of snowfall accumulation is possible. Read More >

Frequently Asked Questions (FAQs)

April 19, 2017 - significant changes to the NWS Public Websites.

If you are unable to find something that you were previously looking for

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https://www.weather.gov/tfx/newsite_faq#FAQ

Regional FAQs

Some Internet Explorer Browsers have issues with WWA Map Interface for Point&Click:
      Set Zoom Level to be 100% in Internet Explorer, ie: ie-11.
      Or the user can press and hold the <CTRL-key> and hit zero, to get browser to 100% zoom level.
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Past (historical) Weather Data
How To Clear Web Browser Cookies and Cache (i.e. Forecast Pages Not Updating)
Point and Click Forecast Pages: Decoding Guide
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Coordinated Universal Time (UTC) Glossary
Product FAQ
MesoWest FAQ (Observations/automated environmental monitoring stations)
Metar/TAF Abbreviations and Acronyms ---or---Federal Meteorological Handbook No. 1
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Western Region Dual Polarization Implementation FAQ
ESRI Map FAQ

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National Weather Service Glossary This glossary contains information on more than 2000 terms.
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Heavy Rainfall in Southern California and in the Southern Plains; Heavy Snow in the Sierra Nevada Mountains and Rockies

Western Region Frequently Asked Questions