Tornado Warning 10, NWS Denver/Boulder, CO

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
230 PM MDT SUN MAY 30 1999

MAIN CONCERN AT THIS TIME IS NOT CLOSED CIRCULATION OFF THE SRN
CALIFORNIA COAST BUT PACIFIC TROF FIRING TS OVER SERN ID/WRN WY.
THIS IS THE MAIN CONCERN IN THE SECOND PD.  FOR TNGT...ANOTHER WEAK
SHORT WAVE DVLPG WDLY SCT TS MTNS...SFC DEWPOINTS IN THE PLAINS IN
THE UPPER 40S TO LOWER 50S THIS AFTN SO STORMS SHUD PICK UP STEAM AS
THEY TRACK E.  LAPS SFC BASED CAPES THIS AFTN IN THE 1000-1800 J/KG
RANGE WITH MOST THE CIN GONE.  POTENTIAL THIS AFTN AND EVENING
SIMILAR TO YDA WITH ISOLD SVR STORMS PSBL PRODUCING LARGE HAIL IN
THE PLAINS.  MAPS THETA-E RIDGE AT THE SFC EXTENDING FM NWRN WELD
COUNTY INTO CNTRL YUMA COUNTY.  STRONGER STORMS WL OCCUR ALONG AND E
OF THIS AXIS.  MAY MNTN SOME FOG IN THE ERN PLAINS TNGT ONCE THINGS
SETTLE DOWN.  FOR MEMORIAL DAY...UPPER TROF OVR SRN ID AND ITS
ASSOCIATED MID LVL COLD POOL TO TRACK E ACRS NRN CO ABOUT THE TIME
OF MAX HEATING.  SFC THETA-E RIDGE WILL BACK ALG THE FRONT RANGE
WITH MDL SOUNDINGS YIELDING CAPES IN THE 1500-2500 J/KG RANGE.  IN
ADDITION...SHEAR PROFILE MUCH IMPROVED WITH BRN NUMBERS IN THE LOWER
20S IN THE ERN PLAINS.  BOTTOM LINE...ENVIRONMENT WILL FAVOR
POTENTIAL FOR TORNADIC SUPERCELLS MON AFTN AND EVENING IN THE NERN
PLAINS.  FOR TUE...SHUD BE MORE STABLE FOLLOWING PASSAGE OF TROF BUT
WITH CLOSED LOW STILL OFF SRN CA COAST CANT RULE OUT ANOTHER WEAK
DISTURBANCE BRUSHING ACRS THE CWA BY THE AFTN.  IN THE EXTENDED...WL
CONTINUE CHC OF TS WED AND THU AS CLOSED CIRCULATIONS SHIFTS E.  BY
FRIDAY SHORT WAVE RIDGE-ITIS APPARENT AS YET ANOTHER TROF FORMS IN
THE DESERT SW.  WL MNTN JUST A CHC OF MTN TS FRI.  COOPER

.DEN...NONE.

COZ030-032>050-310600-

SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1115 AM MDT SUN MAY 30 1999

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...A WEAK UPPER RIDGE WILL REMAIN OVER THE CENTRAL ROCKY
MOUNTAINS THROUGH THIS AFTERNOON AND EVENING.  A WEAK UPPER LEVEL
DISTURBANCE OVER SOUTHWESTERN COLORADO WILL CONTINUE TO MOVE TOWARD
THE AREA DURING THE AFTERNOON.  THIS WILL AID IN CONVECTIVE FORMATION
OVER THE MOUNTAINS AND EASTERN FOOTHILLS BY MID AFTERNOON.  A WEAK
COLD FRONT HAS SURGED SOUTHWARD INTO NORTHEASTERN COLORADO AT MIDDAY
BUT DEWPOINTS HAVE CHANGED LITTLE.  THE SURGE OF COOLER AIR WILL
DELAY HEATING TO THE CONVECTIVE TEMPERATURE.  THE AIR MASS OVER THE
AREA IS DRIER AND MORE STABLE THAN YESTERDAY BUT REMAINS CONDITIONALLY
UNSTABLE...MORE SO AS THE STORMS MOVE FROM THE FOOTHILLS TO THE EASTERN
BORDER.

WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL FORM OVER THE
MOUNTAINS AND EASTERN FOOTHILLS BEFORE MID AFTERNOON AND MOVE TO THE
EAST OVER THE FRONT RANGE URBAN CORRIDOR.  THESE STORMS ARE MOST
LIKELY TO PRODUCE BRIEF STRONG AND GUSTY MICROBURST WINDS.
AS THE STORMS MOVE FARTHER TO THE EAST WHERE DEWPOINTS ARE
HIGHER ONE OR TWO STORMS MAY BE SEVERE AND PRODUCE LARGE HAIL
DURING THE EARLY EVENING.

SPOTTER ACTIVATION MAY BE REQUIRED.

GARD...WFO BOULDER

COZ030-032>050-310600-

SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1115 AM MDT SUN MAY 30 1999

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...A WEAK UPPER RIDGE WILL REMAIN OVER THE CENTRAL ROCKY
MOUNTAINS THROUGH THIS AFTERNOON AND EVENING.  A WEAK UPPER LEVEL
DISTURBANCE OVER SOUTHWESTERN COLORADO WILL CONTINUE TO MOVE TOWARD
THE AREA DURING THE AFTERNOON.  THIS WILL AID IN CONVECTIVE FORMATION
OVER THE MOUNTAINS AND EASTERN FOOTHILLS BY MID AFTERNOON.  A WEAK
COLD FRONT HAS SURGED SOUTHWARD INTO NORTHEASTERN COLORADO AT MIDDAY
BUT DEWPOINTS HAVE CHANGED LITTLE.  THE SURGE OF COOLER AIR WILL
DELAY HEATING TO THE CONVECTIVE TEMPERATURE.  THE AIR MASS OVER THE
AREA IS DRIER AND MORE STABLE THAN YESTERDAY BUT REMAINS CONDITIONALLY
UNSTABLE...MORE SO AS THE STORMS MOVE FROM THE FOOTHILLS TO THE EASTERN
BORDER.

WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL FORM OVER THE
MOUNTAINS AND EASTERN FOOTHILLS BEFORE MID AFTERNOON AND MOVE TO THE
EAST OVER THE FRONT RANGE URBAN CORRIDOR.  THESE STORMS ARE MOST
LIKELY TO PRODUCE BRIEF STRONG AND GUSTY MICROBURST WINDS.
AS THE STORMS MOVE FARTHER TO THE EAST WHERE DEWPOINTS ARE
HIGHER ONE OR TWO STORMS MAY BE SEVERE AND PRODUCE LARGE HAIL
DURING THE EARLY EVENING.

SPOTTER ACTIVATION MAY BE REQUIRED.

GARD...WFO BOULDER