000 AWUS83 KBIS 020010 RWSBIS NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-020700- WEATHER SUMMARY FOR WESTERN AND CENTRAL NORTH DAKOTA NATIONAL WEATHER SERVICE BISMARCK ND 710 PM CDT WED JUN 1 2005 AN AREA OF LOW PRESSURE IN NORTHEASTERN WYOMING BROUGHT A SOUTHERLY FLOW OF AIR TO MUCH OF THE REGION TODAY...AS WELL AS AN INCREASE IN RELATIVE HUMIDITY. TO THE NORTH...HOWEVER...TEMPERATURES REMAINED ON THE COOL SIDE AS NORTHEASTERLY WINDS PREVAILED. HIGHS RANGED FROM 66 IN WILLISTON TO 78 IN BISMARCK. BY MID TO LATE AFTERNOON...THE WARMTH AND HUMIDITY COMBINED WITH A WEATHER SYSTEM IN THE UPPER ATMOSPHERE TO SPAWN SCATTERED THUNDERSTORMS ACROSS THE WESTERN AND NORTH CENTRAL PARTS OF THE STATE. SOME OF THE STORMS BECAME SEVERE...WITH A REPORT OF PENNY SIZE HAIL 6 MILES SOUTH OF SOURIS IN BOTTINEAU COUNTY AT 411 PM CDT. THUNDERSTORMS WILL SPREAD ACROSS MUCH OF WESTERN AND CENTRAL NORTH DAKOTA TONIGHT. SOME OF THEM MAY BECOME SEVERE WITH LARGE HAIL... DAMAGING WINDS...AND POSSIBLY TORNADOES. VERY HEAVY RAINFALL MAY ALSO ACCOMPANY THE STORMS. LOWS WILL BE IN THE 50S. $$ CJS