The National Weather Service has issued an ICE STORM WARNING for the Tulsa Metro. It goes into effect at six this evening. The warning replaces the Winter Storm Watch that had been issued. Below is the text from the National Weather Service: ...ICE STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST SATURDAY... THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED AN ICE STORM WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST SATURDAY... FOR THE FOLLOWING COUNTIES... * IN OKLAHOMA...OTTAWA...PAWNEE...WASHINGTON...OSAGE...CRAIG... NOWATA...CREEK...OKFUSKEE...OKMULGEE...WAGONER...TULSA... ROGERS...MAYES AND DELAWARE. * THIS REPLACES THE WINTER STORM WATCH THAT WAS IN EFFECT HAZARDOUS WEATHER... * PERIODS OF FREEZING RAIN ARE EXPECTED ACROSS MUCH OF NORTHEAST OKLAHOMA TONIGHT INTO SATURDAY AS WARM AIR OVERSPREADS THE SHALLOW LAYER OF COLD AIR AT THE SURFACE. TEMPERATURES WILL BE CLOSER TO THE FREEZING MARK SOUTH OF INTERSTATE 44. THEREFORE...THERE IS STILL SOME UNCERTAINTY ON HOW FAR SOUTH THE FREEZING RAIN WILL OCCUR. * ICE ACCUMULATIONS OF ONE-QUARTER TO FOUR TENTHS OF AN INCH IS EXPECTED FROM 6 PM THIS EVENING TO 6 PM CST SATURDAY. IMPACTS... * TRAVEL WILL BECOME DANGEROUS OR IMPOSSIBLE EVEN ON TREATED SURFACES. TREE LIMBS AND POWER LINES WILL BE DOWNED AND WIDESPREAD POWER OUTAGES ARE LIKELY DEFINITION... * AN ICE STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. PRECAUTIONARY/PREPAREDNESS ACTIONS... * DELAY TRAVEL AND STAY HOME IF POSSIBLE UNTIL CONDITIONS IMPROVE.