Storm Team 4Cast for 3/12/13: The rest of the week will be cold, but spring is on the way

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  • It seems like the winter weather pattern just won’t let up on Wisconsin with high temperatures running five to ten degrees below normal and a persistent barrage of either snow or rain and snow storms.

  • We could still see a few flurries in Milwaukee this morning as another low pressure system well to the north moves out but another is rolling this way for late Thursday and Friday.

  • The good news for today is the chance for a little sunshine across the state and in southeast Wisconsin.

  • The question I have been asked frequently lately is why the cold has returned and the storms have been so consistent and frequent lately.

  • The answer is in the polar jet stream this winter, which has meandered a bit north and south nearly in the winter season and has now set up as a consistent northwest direction since early February.

  • The jet stream pattern in November through January was basically from the west to northwest, and the more westerly periods allowed mild air to roll across the state.

  • That direction also kept most of the snowstorms north or south of the state.

  • TUESDAY NIGHT: Mostly cloudy, cold and breezy. Lows: 20 Lakefront... 17 Waukesha & Inland. Wind: NW 10-15 mph.

  • WEDNESDAY: Morning flurries possible then decreasing clouds, breezy and cold for March. High: 32. Wind: NW 10-20 mph.

  • WED NIGHT: Mostly clear and chilly for March. Lows: 18 Lakefront... 13 Waukesha & Inland Wind: WNW 10-15 mph.

  • THURSDAY: Partly to mostly cloudy with a slight chance for a light snow or rain shower. High: 37. Wind: SSW 5-10 mph.

  • The polar jet stream during the past six weeks has been basically northwest which allows colder air to move south, and periodically allowing the southern jet to move storms northward.