Severe

SVRTWC The National Weather Service in Tucson has issued a * Severe Thunderstorm Warning for... Northeastern Pima County in southeastern Arizona... Southeastern Pinal County in southeastern Arizona... * Until 745 PM MST. * At 658 PM MST, severe thunderstorms were located along a line from 9 miles southwest of Avra Valley to 6 miles south of Davis-Monthan Air Force Base, moving northeast at 35 mph. HAZARD...60 mph wind gusts and small hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees.

...The Flood Warning is extended for the following rivers in Iowa... Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. * WHAT...Moderate flooding is occurring. * WHERE...Wapsipinicon River near De Witt 4S. * WHEN...Until late Monday night. * IMPACTS...At 12.5 feet, Water affects old U.S. Highway 61 near the river. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 12.5 feet and falling. - Recent Activity...The river has slipped below the major flood

At 757 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 3 and 4 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* WHAT...Heavy, wet snow expected. Total snow accumulations between 6 and 12 inches. Highest snowfall amounts in the northern slopes between 4500 feet and 6500 feet. Winds gusting as high as 45 mph. * WHERE...Elkhorn and Boulder Mountains, Little Belt and Highwood Mountains, and Snowy and Judith Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible.

* WHAT...Heavy, wet snow expected. Total snow accumulations between 6 and 14 inches. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with

* WHAT...Heavy, wet snow expected. Total snow accumulations between 10 and 20 inches, with the exception of the Lincoln valley where up to 7 inches is expected. Isolated amounts approaching 30 inches within the Bob Marshall Wilderness. Winds gusting as high as 45 mph. * WHERE...Portions of central and north central Montana. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree