Heavy Rain and Flooding Threat in the Ohio Valley

Gulf moisture will combine with a cold front and will bring heavy rain and scattered flash flooding over parts of the Mid-South into the Ohio Valley through the morning and the Ohio Valley and Central Appalachians on Tuesday. Showers and thunderstorms, some severe, are expected over the Southern Rockies/Southern High Plains on Tuesday. Read More >

Getting The Word | Climatology | Winter Storms | Definitions

Whenever winter weather threatens, your National Weather Service Forecast Office will issue watches, warnings, advisories, and statements to keep you informed and prepared.

Winter Storm Outlook

Issued when there is a good chance of a major winter weather event beyond 36 hours.

Winter Storm Watch

Issued when the following conditions are possible within 12 to 36 hours: heavy snowfall of 4 or more inches in 12 hours or 6 or more inches in 24 hours; freezing rain and/or freezing drizzle accumulating to a depth of 0.25 inches or greater; or heavy sleet accumulating to a depth of 1/2 inch or more.

Winter Storm Warning

Issued when the hazardous winter weather conditions defined above are occurring or expected to occur within 12 hours.

Freeze Warning

Issued for the first occurrence of freezing temperatures in the fall, for late freezes during the spring, or for a freeze expected to occur after a prolonged warm spell.

Winter Weather Advisory

Issued when either or all of the following are expected. Snow accumulations less than 4 inches in 6 hours, or less than 6 inches in 24 hours OR freezing rain accumulation less than 0.25 inch. OR freezing drizzle with little or no accumulation.

Wind Chill Advisory

Issued when forecast wind chill values will be below -20 degrees.

FWD RSS Feed

Heavy Rain and Flooding Threat in the Ohio Valley

NWS Ft. Worth