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Flood Watch — Kaibab Plateau; Marble and Glen Canyons; Grand Canyon Country; Coconino Plateau; Northeast Plateaus and Mesas Hwy 264 Northward; Chinle Valley; Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Coconino County; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; Western Mogollon Rim; Black Mesa Area; Northeast Plateaus and Mesas South of Hwy 264 Severity: Severe. Certainty: Possible. * WHAT...Flash flooding caused by excessive and long duration rainfall. * WHERE...Portions of north central and northeastern Arizona, including areas from Flagstaff to St. John's and areas northward. * WHEN...Through late tonight. * IMPACTS...Flooding will be possible over burn areas, low-water crossings, creeks, streams, washes and swimming holes. Some larger creeks and rivers are expected to exceed bankfull. Flooding of paved roads and highway underpasses will be possible. Unpaved roads could become muddy and impassable. * ADDITIONAL DETAILS... - Low pressure will interact with tropical moisture to produce numerous showers and embedded thunderstorms, with heavy rain that will fall over saturated soils and burn scars. This could lead to flash flooding and rises on streams and rivers. - Additional information is available at weather.gov/flagstaff.
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