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Criteria for a flood warning and flash flood warning

The National Weather Service (NWS) is the official U.S. government agency charged with issuing weather watches, warnings, and advisories and is the source used by iAlert.com. Below is the criteria for a flooding used by NWS forecasters when issuing flood warnings across the country…. FLOOD WARNING: A Flood Warning is issued when inundation of a normally dry area near a stream or other watercourse is expected, OR unusually severe ponding of water expected. Flooding of rivers or streams doesn’t always required rain to be overhead for your area to flood. Heavy rain upstream will make its way downstream causing flooding. FLASH FLOOD WARNING: A Flash Flood Warning will be issued after few hours of locally heavy rainfall, a dam or levee failure, or water released from an ice jam rapidly flooding nearby land. Although flash flooding typically occurs in hilly or mountainous areas flash flooding can happen anywhere Looking for the criteria for a tornado warning, criteria of a severe thunderstorm warning, or weather glossary?
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Severe Weather June 24: Enhanced Risk, Level 3 of 5

Severe Weather June 24, 2026: SPC Issues Enhanced Risk Outlook

Severe weather June 24, 2026 is the focus of a new convective outlook issued by the NOAA Storm Prediction Center, with the highest categorical risk reaching an Enhanced Risk level, the third of five severe categories…

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Severe thunderstorms June 23 SPC Enhanced Risk outlook map

Severe Thunderstorms June 23: SPC Issues Enhanced Risk Outlook

Severe thunderstorms June 23 are the focus of a Day 1 Convective Outlook issued by the NOAA Storm Prediction Center (SPC), valid for Tuesday, June 23, 2026. The SPC has placed portions of the United States…

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Severe weather June 22, 2026 SPC Day 1 Convective Outlook map showing Slight, Marginal, and General Thunderstorm risk areas from the High Plains to the Mid-Atlantic.

Severe Weather June 22, 2026: SPC Issues Slight Risk Convective Outlook

Severe weather June 22, 2026 is possible as the NOAA Storm Prediction Center (SPC) has issued a Day 1 Convective Outlook carrying a Slight Risk, the second of five risk categories. The outlook identifies General Thunderstorm,…

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