Severe Thunderstorm Warning 9, NWS Denver/Boulder, CO

COZ002-004-011-012-013-090000-

SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1130 AM MDT MON JUN 8 1992

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

ADAMS          DENVER     JACKSON      LOGAN       SEDGWICK     YUMA
ARAPAHOE       DOUGLAS    JEFFERSON    MORGAN      SUMMIT
BOULDER        GILPIN     LARIMER      PARK        WASHINGTON
CLEAR CREEK    GRAND      LAKE         PHILLIPS    WELD

A WEAK COLD FRONT WAS MOVING SOUTHWEST ACROSS EXTREME NORTHEAST COLORADO
THIS MORNING BRINGING IN LOW CLOUDS AND COOLER AIR.  THE CLOUDS WILL
KEEP SURFACE TEMPERATURS COOL ENOUGH TO LIMIT THUNDERSTORM DEVELOPMENT
SO LITTLE SEVERE WEATHER IS EXPECTED ACROSS LOGAN...SEDGEWICK...
PHILLIPS...YUMA...AND WASHINGTON COUNTIES.

HOWEVER OVER THE REMAINDER OF THE WARNING AREA CONDITIONS ARE SHAPING UP
TO TURN INTO AN ACTIVE DAY.  AN UPPER LEVEL TROUGH APPROACHING FROM THE
SOUTHEAST WILL BRING IN COOLER AIR ALOFT WHICH WILL DESTABILIZE THE
UPPER ATMOSOHERE.  AT THE SURFACE CLEAR AIR WAS ALLOWING SURFACE
TEMPERATURES TO RISE CREATING A TEMPERATURE DIFFERENTIAL BETWEEN WARM
AIR OVER THE WESTERN PLAINS AND COOLER AIR OVER THE NORTHEAST PLAINS.
THIS BOUNDARY WILL PROVIDE THE FOCUS OF DEVELOPMENT THIS AFTERNOON.
ALSO NORTH TO NORTH EAST SURFACE WINDS WERE ALSO PROVIDING AN UPSLOPE
COMPONENT ALONG THE FRONT RANGE.  THUNDERSTORMS WERE ALREADY DEVELOPING
OVER THE MOUNTAINS AND AS THEY MOVE ONTO THE PLAINS THEY WILL HELP
INITIATE THUNDERSTORM DEVELOPMENT.

THUS THE MOUNTAIN COUNTIES...JACKSON...GRAND...LARIMER...BOULDER...
GILPIN....CLEAR CREEK...SUMMIT.....LAKE....AND PARK COUNTIES...WILL SEE
SCATTERED THUNDERSTORM DEVELOPMENT FIRST BECOMING MORE WIDESPREAD EAST
OF THE DIVIDE AFTER 100 PM.  SOME OF THESE THUNDERSTORMS WILL CONTAIN
BRIEF HEAVY RAIN AND PEA TO MARBLE SIZE HAIL.

OVER THE WESTERN PLAINS...WELD...MORGAN...ADAMS...ARAPAHOE...DENVER...
JEFFERSON...AND DOUGLAS COUNTIES SCATTERED THUNDERSTORMS WILL DEVELOP
AFTER 100 PM AS THEY MOVE OFF THE MOUNTAINS.  BY 300 PM THUNDERSTORMS
WILL BECOME MORE NUMEROUS AND SOME WILL BECOME SEVERE WITH PEA TO
DIME SIZE HAIL...WINDS GUSTS TO 58 MPH OR GREATER...BRIEFT HEAVY
RAINS...AND FREQUENT LIGHTNING.

HOLMES

COZ002-004-011-012-091930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1233 PM MDT MON JUN 8 1992

        ...THUNDERSTORMS DEVELOPING ALONG FRONT RANGE...

AT 1225 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED THUNDERSTORMS
DEVELOPING ALONG THE FRONT RANGE.  THUNDERSTORMS WERE LOCATED NEAR ESTES
PARK IN SOUTHERN LARIMER COUNTY...NEAR WARD IN WESTERN BOULDER COUNTY
AND IN PARTS OF GILPIN...CLEAR CREEK AND PARK COUNTIES.  THE STORMS
WERE DRIFTING SLOWLY SOUTHEAST.

SOME OF THE STORMS COULD PRODUCE HEAVY RAIN WHICH...COUPLED WITH THE
SLOW MOVEMENT...MIGHT CAUSE SOME FLOODING OF ROADS AND SMALL STREAMS.
PERSONS IN THE MOUNTAINS AND FOOTHILLS SHOULD BE ALERT TO THUNDERSTORMS
AND HEAVY RAIN...ESPECIALLY IF YOU ARE NEAR SMALL STREAMS OR IN CANYON
BOTTOMS.  BE PREPARED TO MOVE TO HIGHER GROUND IF YOU EXPERIENCE RISING
WATER.

DELGADO

COZ-011-012-082030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
140 PM MDT MON JUN 8 1992

...SLOW MOVING THUNDERSTORMS IN NORTHEAST LARIMER...NORTHWEST WELD...AND
SOUTHERN JEFFERSON COUNTIES....

AT 140 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAIN IN NORTHEAST LARIMER AND
NORTHWEST WELD COUNTIES.  THESE STORMS WERE LOCATED 5 MILES SOUTH OF
NUNN AND 10 MILES NORTHWEST OF NUNN.  THESE STORMS WERE NEARLY
STATIONARY OR MOVING SLOWLY NORTH AT 5 MPH.

ANOTHER SLOW MOVING THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED 5
MILES WEST OF DECKERS IN SOUTHERN JEFFERSON COUNTY.  THIS STORM WAS
NEARLY STATIONARY AND DEVELOPING EASTWARD.  LIGTNING DETECTION NOTED
FREQUENT LIGTNING WITH THIS STORM.

PEOPLE SHOULD BE AWARE OF DEADLY CLOUD TO GROUND LIGHTNING...THE NUMBER
ONE WEATHER KILLER IN COLORADO.  SEEK SHELTER IN A HOUSE OR CAR WHEN
THUNDERSTORMS WITH FREQUENT LIGTNING APPROACH.  DO NOT STAND NEAR
ISOLATED TREES OR REMAIN IN AN EXPOSED AREA.

SOME OF THUNDERSTORMS COULD PRODUCE HEAVY RAIN WHICH...COUPLED WITH
THE SLOW MOVEMENT...MIGHT CAUSE SOME FLOODING OF ROADS AND SMALL
STREAMS.  IF YOU ARE IN THE MOUNTAINS A$ND FOOTHILLS SHOULD BE ALERT TO
THUNDERSTORMS AND HEAVY RAIN...ESPECIALLY IF YOU ARE NEAR SMALL STREAMS
OR IN CANYON BOTTOMS.  BE PREPARED TO MOVE TO HIGHER GROUND IF YOU
EXPERIENCE RISING WATER.

HOLMES

COZ-011-012-082030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
250 PM MDT MON JUN 8 1992

...STATIONARY THUNDERSTORMS WITH VERY HEAVY RAIN IN NORTH CENTRAL ADAMS
COUNTY AND SOUTHEAST DOUGLAS COUNTY...

AT 250 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A
STATIONARY THUNDERSTORM WITH VERY HEAVY RAIN JUST EAST OF BRIGHTON IN
NORTH CENTRAL ADAMS COUNTY AND ANOTHER ONE BETWEEN LARKSPUR AND
CASTLE ROCK IN SOUTHEAST DOUGLAS COUNTY. THESE STORMS WERE NEARLY
STATIONARY.

THESE STORMS WERE INDICATING FREQUENT CLOUD TO GROUND LIGHTNING BY
LIGHTNING DETECTION EQUIPMENT.  DOPPLER RADAR ALSO INDICATED RAINFALL
RATES OF .50 TO 1.00 INHES IN THE LAST HOUR.

BE AWARE OF DEADLY CLOUD TO GROUND LIGHTNING...THE NUMBER
ONE WEATHER KILLER IN COLORADO.  SEEK SHELTER IN A HOUSE OR CAR WHEN
THUNDERSTORMS WITH FREQUENT LIGTNING APPROACH.  DO NOT STAND NEAR
ISOLATED TREES OR REMAIN IN AN EXPOSED AREA.

SOME OF THUNDERSTORMS COULD PRODUCE HEAVY RAIN WHICH...COUPLED WITH
THE SLOW MOVEMENT...MIGHT CAUSE SOME FLOODING OF ROADS AND SMALL
STREAMS.  MOTORISTS TRAVELING ALONG I-25 IN DOUGLAS COUNTY SHOULD BE
PREPARED FOR LIMITIED VISIBILITIES IN VERY HEAVY RAIN.

HOLMES

COZ-011-012-082230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
330 PM MDT MON JUN 8 1992

...THUNDERSTORMS WITH VERY HEAVY RAIN AND SMALL HAIL IN NEAR THE
FOOTHILLS IN LARIMER COUNTY...

...AN ISOLATED THUNDERSTORM CONTAINING INTENSE RAIN LOCATED JUST WEST OF
PLATTEVILLE...

AT 330 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF
THUNDERSTORMS WITH VERY HEAVY RAIN FROM LONGMONT NORTH TO FORT COLLINS.
THE STORMS WERE NEARLY STATIONARY.  LOCAL HAM SPOTTERS REPORTED
TORRENTIAL RAIN ON HIGHWAY 66 EAST OF LONGMONT.  RADAR ALSO SHOWED AN
ISOLATED THUNDERSTORM CONTAINING INTENSE RAIN LOCATED JUST WEST OF
PLATTEVILLE WHICH WAS NEARLY STATIONARY.  THIS STORM COULD PRODUCE
RAINFALL OF 1 TO 2 INCHES DURING THE NEXT HOUR.

AT 315 PM SPOTTERS REPORTED 6 INCHES OF PEA SIZE HAIL NORTH OF FORT
COLLINS ON I-25.  ONE QUARTER TO ON HALF INCH HAIL WAS REPORTED AT THE
CSU MAIN CAMPUS IN FORT COLLINS AND STREET FLOODING OCCURRED AT
LOVELAND.

THESE STORMS WERE INDICATING FREQUENT CLOUD TO GROUND LIGHTNING BY
LIGHTNING DETECTION EQUIPMENT.  DOPPLER RADAR ALSO INDICATED RAINFALL
RATES OF .50 TO 1.00 INCHES PER HOUR WITH MOST OF THESE STORMS.

BE AWARE OF DEADLY CLOUD TO GROUND LIGHTNING...THE NUMBER
ONE WEATHER KILLER IN COLORADO.  SEEK SHELTER IN A HOUSE OR CAR WHEN
THUNDERSTORMS WITH FREQUENT LIGTNING APPROACH.  DO NOT STAND NEAR
ISOLATED TREES OR REMAIN IN AN EXPOSED AREA.

THUNDERSTORMS WILL PRODUCE HEAVY RAIN WHICH...COUPLED WITH
THE SLOW MOVEMENT...WILL CAUSE SOME FLOODING OF ROADS AND SMALL
STREAMS.  MOTORISTS TRAVELING ALONG I-25 IN EASTERN LARIMER COUNTY
SHOULD  BE PREPARED FOR LIMITIED VISIBILITIES IN VERY HEAVY RAIN.

HOLMES