MILWAUKEE - 2-4 inches of snow fell in Southeastern Wisconsin Monday night.

Now, temperatures are falling dramatically.

"This week will bring some of the coldest temperatures and wind chills that we've seen in a long time," warns Storm Team 4Caster Brian Gotter.

Winds between 15-30 mph bring will wind chills of 15 to 25 degrees below zero late Monday night.

Snow and blowing snow has forced a winter weather advisory to be placed on Southeastern Wisconsin until 6:00 a.m. Tuesday.

Gotter says temperatures will fall to a point where highs on a couple days this week may not even reach above zero, and some nighttime temperatures could drop to -15 to -20.

Even with the cold temperatures, there's still a threat of 4-10 inches of snow falling this week as well.

Here's more from the National Weather Service:

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
915 PM CST MON JAN 12 2009

...SNOW AND BLOWING SNOW EXPECTED THROUGH TUESDAY MORNING......

DANGEROUS WIND CHILLS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING....A POTENT ALBERTA CLIPPER SYSTEM WILL TRACK ACROSS NORTHERN ILLINOIS INTO NORTHERN OHIO TONIGHT. SNOW FROM THIS SYSTEM WILL SLOWLY WIND DOWN OVERNIGHT FROM WEST TO EAST FOLLOWED BY GUSTY WINDS ACROSS SOUTH CENTRAL AND SOUTHEAST WISCONSIN.

IN ADDITION...VERY COLD AIR WILL FILTER INTO THE AREA BEHIND THE LOW OVERNIGHT. THE EXTREME COLD WILL COMBINE WITH THE STRONG WINDS TO CREATE VERY LOW WIND CHILL TEMPERATURES OVER PORTIONS OF THE AREA LATE TONIGHT INTO TUESDAY MORNING.

FOND DU LAC-SHEBOYGAN-DODGE-WASHINGTON-OZAUKEE-JEFFERSON-WAUKESHA-MILWAUKEE-WALWORTH-RACINE-KENOSHA-INCLUDING THE CITIES OF...FOND DU LAC...SHEBOYGAN...BEAVER DAM...WEST BEND...PORT WASHINGTON...JEFFERSON...LAKE MILLS...WAUKESHA...BROOKFIELD...MILWAUKEE...ELKHORN...LAKE GENEVA...RACINE...KENOSHA

915 PM CST MON JAN 12 2009

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST TUESDAY.

SNOW IS EXPECTED TO SLOWLY TAPER OFF FROM WEST TO EAST ACROSS SOUTHEAST WISCONSIN LATE TONIGHT. SNOW ACCUMULATIONS OF 2 TO 4 INCHES OF LIGHT...POWDERY SNOW WILL BLANKET THE AREA BY MIDNIGHT. THE HIGHEST SNOW AMOUNTS SHOULD BE NORTH OF A LINE FROM JEFFERSON TO MILWAUKEE. NORTH TO NORTHWEST WINDS WILL INCREASE AFTER MIDNIGHT...WITH SUSTAINED WINDS AT 15 TO 25 MPH AND WIND GUSTS UP TO 30 MPH POSSIBLE.

THE STRONG WINDS AND FLUFFY SNOW WILL LEAD TO BLOWING SNOW...WHICH MAY REDUCE VISIBILITIES TO LESS THAN ONE HALF MILE AT TIMES. DRIFTING SNOW IS ALSO EXPECTED...ESPECIALLY ON EAST TO WEST ROADS. VERY COLD AIR WILL REACH SOUTHEAST WISCONSIN BEHIND THE CLIPPER LATE TONIGHT. THE COLD TEMPERATURES AND WINDY CONDITIONS WILL CAUSE LOW WIND CHILLS LATE TONIGHT INTO TUESDAY MORNING. WIND CHILLS OF 10 TO 20 BELOW ZERO ARE EXPECTED.

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS.

Delivered by DTN Meteorlogix MON Jan 12 2009  9:16PM CST