WUS85 KBOU 211942 SPSDEN COZ030-032>050-212200-
SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
140 PM MDT FRI JUL 21 2000
THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES
ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS
ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER
LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK
SUMMIT WASHINGTON WELD
SYNOPSIS...SURFACE HIGH PRESSURE OVER THE GREAT PLAINS ALONG WITH
CONTINUED WEAK LOW LEVEL UPSLOPE FLOW WILL KEEP THE AIR MASS OVER NORTHEASTERN
COLORADO VERY MOIST NEAR THE SURFACE AS DEWPOINTS INCREASE INTO THE LOWER 60S. STEEP
LAPSE RATES AND AN UPPER LEVEL DISTURBANCE WILL CONTRIBUTE TO THE OVERALL INSTABILITY OF
THE ATMOSPHERE. WITH HEATING...SCATTERED SHOWERS AND THUNDERSTORMS ARE FORMING
OVER THE EASTERN FOOTHILLS AND THE HIGHER TERRAIN OF BOTH THE CHEYENNE RIDGE AND
PALMER DIVIDE EARLY THIS AFTERNOON. THESE STORMS WILL SPREAD TO THE SOUTHEAST OVER
THE PLAINS DURING THE MID AND LATE AFTERNOON AND EVENING. THE GREATEST INSTABILITY
WILL GENERALLY BE EAST OF A CONVERGENCE LINE FROM EAST OF CHEYENNE WYOMING TO
JUST EAST OF LIMON...WHERE AMPLE SHEAR WILL BE PRESENT TO PRODUCE A FEW SEVERE
THUNDERSTORMS WITH LARGE HAIL...DAMAGING WINDS
AND POSSIBLE TORNADOES.
THE AIR MASS OVER THE MOUNTAINS AND MOUNTAIN VALLEYS WILL REMAIN RELATIVELY DRY AND
STABLE WITH LITTLE CONVECTIVE DEVELOPMENT ANTICIPATED EXCEPT ALONG AND EAST OF THE
FRONT RANGE. SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON AND EVENING OVER THE
FRONT RANGE URBAN CORRIDOR AND THE NORTHEASTERN PLAINS. $$ GARD...WFO BOULDERSign up for our Free Email for storm chasers |
