HEAVY RAIN EVENTS ALONG THE FRONT RANGEBIG THOMPSON, FORT COLLINS, CHEYANNE, MADISON COUNTY (VA)

• A LARGE AMPLITUDE NEGATIVE-TILTED UPPER RIDGE AXIS LIES JUST EAST AND NORTH OF THE THREAT AREA,

• WINDS ALOFT ARE LIGHT AND SOUTHEASTERLY

• A WEAK SHORTWAVE ROTATES NORTHWARD TOWARDS THE THREAT AREA RESULTING IN WEAK PVA

• A SLOW MOVING FRONT THAT HANGS UP JUST SOUTH OF THE AREA

FROM MADDOX ET AL., 1977

*******CAN ALSO BE CALLED BLOCKING ANTICYCLONE *******

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