500 MB HEIGHTS AND 1000-500 MB THICKNESSTHE HEAVIEST SNOW (CENTRAL AND EASTERN U.S.) DURING THE NEXT 12 HRS USUALLY OCCURS

• ABOUT 2.5 DEGREES LATITUDE (150 nm) TO THE LEFT OF THE 500 MB VORT TRACK.

• ABOUT 6.5 TO 7 DEGREES DOWNSTREAM FROM THE VORT.

• ALONG THE PATH OF THE 500 LOW, SLIGHTLY DOWNSTREAM OF WHERE THE CONTOURS CHANGE FROM CYCLONIC TO ANTICYCLONIC

• WITHIN THE 531-537 1000-500 MB THICKNESS CHANNEL, NEAR THE THICKNESS RIDGE

FROM GOREE AND YOUNKIN, 1966

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