Heavy rain and flash flooding possible in portions of the Southwest this weekend

An upper-level low in the Southwest U.S. will act as a trigger for thunderstorms this weekend. The area of greatest concern is in New Mexico, southeast Utah and portions of southern Colorado. Storms will be slow moving and could bring several rounds of rain to the same areas. Rainfall amounts may exceed 3 inches in localized areas. Flash Flood Watches are in effect.
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Hazardous Weather Conditions

Last Update: 849 AM CDT Sun Aug 20 2017

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Chicago, IL Local Forecast Office

22NM NE Evanston IL

Marine Zone Forecast

SHEBOYGAN WI TO PENTWATER MI SOUTH
Today
South winds 10 to 15 kt increasing to 10 to 20 kt early in the afternoon. Waves 1 to 3 ft.
Tonight
South winds 10 to 20 kt becoming southwest after midnight and diminishing to 10 to 15 kt late. Slight chance of showers in the evening...then slight chance of showers and thunderstorms overnight. Waves 1 to 3 ft.
Monday
Southwest winds 10 to 15 kt becoming south in the afternoon. Chance of showers in the morning. Waves 1 to 3 ft.
Monday Night
South winds 10 to 20 kt becoming southwest. Chance of showers and thunderstorms in the evening...then showers and thunderstorms overnight. Waves 1 to 3 ft building to 2 to 4 ft.
Tuesday
West winds 15 to 25 kt becoming northwest 20 to 25 kt. Showers and thunderstorms likely in the morning...then chance of showers and thunderstorms in the afternoon. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
Tuesday Night
Northwest winds 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft.
Wednesday
Northwest winds 10 to 20 kt becoming north. Waves 3 to 6 ft occasionally to 8 ft.
Thursday
Northeast winds 10 to 15 kt. Waves subsiding to 1 to 3 ft.
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ABOUT THIS FORECAST

Last Update: 849 AM CDT Sun Aug 20 2017
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