NWS: Cooler...breezy. Partly cloudy. Highs 45. (West winds 15 to 25 mph adding insult to injury)
Accuweather: 51 (RealFeel® 41)
The Weather Channel: 52
KSTP: 49FOX: 51
|Some ugly windchill temps this Sunday morning!|
The National Weather Service's Climate Prediction Center (CPC) produces this graphic each day. It's serves as a cold weather indicator for Chi and is produced from the output of the Service's GFS model. When this index (the North Atlantic Oscillation Index or "NAO") goes negative, the odds of cool weather are increased here. It's produced by comparing pressures in Iceland with those in Portugal. The presence of the warm air pool aloft over Greenland and the North Atlantic drives this index into its negative (or cold) phase.