FXUS63 KDLH 201950
AFDDLH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
306 PM CDT SAT APR 19 2003

FORECAST PROBLEM INCLUDES LOW RELATIVE HUMIDITIES BEGINNING TUESDAY.

BACKWASH OF DEEP...VERTICALLY STACKED LOW SHOULD BEGIN PULLING EAST
LATE TONIGHT...WITH THE PRECIPITATION SHIELD/COMMA HEAD MOVING BEYOND
THE ARROWHEAD AND NORTHWEST WISCONSIN EARLY MONDAY AFTERNOON.  THE
TIME OF DAY AND THE WEAKNESS AND LATENESS OF COLD ADVECTION SHOULD
PREVENT THE RAIN FROM CHANGING OVER TO ANYTHING ELSE...THAT IS APT
TO HAPPEN SOMEWHERE FURTHER EAST.  DEEP MOISTURE AND CONVECTION
ASSOCIATED WITH THE WARM ADVECTION IS ALREADY EAST OF OUR AREA.

BEHIND THE LOW...RIDGING FROM HIGH PRESSURE OVER HUDSON BAY WILL
BUILD DOWN INTO OUR AREA...BEGINNING MONDAY.  THE HUDSON BAY HIGH
WILL SPEND ALL THE COMING WEEK AND POSSIBLY THE WEEKEND TRANSFORMING
ITSELF INTO AN INCREASINGLY STRONG LAKE SUPERIOR HIGH...FIRST AS A
RIDGE OVER THE LAKE...THEN AS A SECONDARY CENTER OVER THE LAKE...
THEN AS A CENTER OVER THE LAKE WITH A SECONDARY CENTER OVER JAMES
BAY...THEN FINALLY AS A SINGLE STRONG AND GROWING HIGH PRESSURE
CENTER OVER THE LAKE. ALL OF THIS MEANS THE SAME THING...COLD AND
VERY DRY AIR BEING CARRIED INLAND ON BRISK...GUSTY ONSHORE WINDS.
WELL INLAND...THE STRONG SUN WILL WARM THE AIR SOMEWHAT...BUT EVERY
AREA FACING THE WATER WILL REMAIN COLD AND BLUSTERY.

THIS SORT OF PATTERN IS RATHER COMMON AT THIS TIME OF YEAR.

.DLH...NONE.

EOM