The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for... Northeastern Woods County in northwestern Oklahoma... Alfalfa County in northwestern Oklahoma... Western Grant County in northern Oklahoma...

* Until 1245 AM CDT.

* At 1206 AM CDT, severe thunderstorms were located along a line extending from near Alva to near Cherokee, moving east at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees.

* Locations impacted include... Alva, Cherokee, Carmen, Wakita, Jet, Nash, Burlington, Dacoma, Manchester, Amorita, Byron, Lambert, Ingersoll, Great Salt Plains Lake, Driftwood, Capron, Waldron, and Hopeton.

For your protection move to an interior room on the lowest floor of a building.

SEVERE THUNDERSTORM WATCH 265 REMAINS IN EFFECT UNTIL 200 AM CDT FOR THE FOLLOWING LOCATIONS OK ., OKLAHOMA COUNTIES INCLUDED ARE

ALFALFA, GRANT, MAJOR, WOODS

...FLOOD ADVISORY IN EFFECT UNTIL 245 AM CDT MONDAY...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of northwest Oklahoma, including the following county, Woods.

* WHEN...Until 245 AM CDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS... - At 1135 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen. - Additional rainfall amounts of 1 to 2 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Alva and Capron. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.