Hazardous Weather Outlook
Issued by NWS Denver/Boulder, CO

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FLUS45 KBOU 281720
HWOBOU

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1120 AM MDT THU APR 28 2016

COZ030>051-291730-
JACKSON COUNTY BELOW 9000 FEET-
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
CENTRAL AND SOUTHEAST PARK COUNTY-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY-
1120 AM MDT THU APR 28 2016

...WINTER STORM WARNING IN EFFECT FOR THE FRONT RANGE MOUNTAINS
AND FOOTHILLS...AND SOUTH PARK TONIGHT THROUGH FRIDAY EVENING...

...A WINTER STORM WATCH IN EFFECT FOR THE PALMER DIVIDE SOUTH OF
DENVER TONIGHT THROUGH FRIDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

THE BAND OF RAIN AND SNOW SHOWERS MOVING NORTHWARD ACROSS NORTHEAST
COLORADO LATE THIS MORNING WILL EXIT THE STATE BY EARLY THIS
AFTERNOON. THIS SHOWER BAND IS ASSOCIATED WITH A WEAK UPPER LEVEL
WEATHER DISTURBANCE ROTATING AROUND THE PARENT STORM SYSTEM
SPINNING OVER NORTHERN ARIZONA. DURING THE AFTERNOON HOURS...
SHOWERS WILL BECOME MORE NUMEROUS ACROSS THE HIGH COUNTRY AS
MOIST AND UNSTABLE AIR FEEDS UP INTO THE AREA AHEAD OF THE
APPROACHING STORM. SHOWERS ARE EXPECTED TO REDEVELOP ON THE PLAINS
THROUGH THE AFTERNOON FIRST ALONG THE FOOTHILLS AND OVER THE
PALMER DIVIDE. TEMPERATURES ON THE PLAINS SHOULD BE WARM ENOUGH
TO KEEP MOST OF THE PRECIPITATION AS RAIN...EXCEPT ON THE PALMER
DIVIDE WHERE A MIX OF RAIN AND SNOW IS POSSIBLE.

PRECIPITATION WILL BECOME WIDESPREAD OVERNIGHT...STARTING AS A
RAIN/SNOW MIX AT LOWER ELEVATIONS DURING THE EVENING. AS
TEMPERATURES FALL AND A MOIST UPSLOPE FLOW STRENGTHENS...PRECIPITATION
SHOULD CHANGE OVER TO ALL SNOW AT ELEVATIONS ABOVE 5000 FEET BY
MIDNIGHT AND CHANGE TO A MIX OF RAIN AND SNOW IN LOWER AREAS ON
THE PLAINS. MODERATE TO HEAVY SNOWFALL IS LIKELY TO DEVELOP THIS
EVENING IN THE FRONT RANGE MOUNTAINS AND FOOTHILLS AS WELL AS
ACROSS SOUTH PARK WHERE SNOWFALL RATES IN AN EXCESS OF AN INCH PER
HOUR ARE LIKELY AFTER MIDNIGHT. SNOW ACCUMULATIONS BY MORNING
MAY RANGE FROM 1 TO 4 INCHES WITHIN THE I-25 URBAN CORRIDOR...LESS
THAN THAT FARTHER EAST...AND ANYWHERE FROM 3 TO 7 INCHES ON EAST
FACING SLOPES OF THE FRONT RANGE...SOUTH PARK AND PALMER DIVIDE.
MUCH OF THE SNOW FALLING ON THE PLAINS WILL PROBABLY MELT
PARTICULARLY ON THE WARMER ROAD SURFACES. WITH THE HEAVIER
SNOWFALL IN THE HIGH COUNTRY VISIBILITIES UNDER A QUARTER MILE ARE
LIKELY AND ROADS WILL BECOME SLUSHY AND EVENTUALLY SNOW COVERED.


.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A PACIFIC STORM SYSTEM OVER THE FOUR CORNERS REGION FRIDAY MORNING
WILL MAKE ITS WAY ACROSS COLORADO THROUGH FRIDAY NIGHT. PRECIPITATION
WILL CONTINUE THROUGH AT LEAST FRIDAY EVENING...WITH SIGNIFICANT
SNOW ACCUMULATIONS OF 10 TO 2O INCHES EXPECTED IN THE HIGH
COUNTRY...WITH 6 TO 12 INCHES POSSIBLE ALONG THE PALMER DIVIDE
SOUTH OF DENVER. SNOW AMOUNTS ALONG THE URBAN CORRIDOR WILL RANGE
FROM 2 TO 5 INCHES THROUGH FRIDAY NIGHT...WITH ACCUMULATIONS OF 1
TO 3 INCHES ACROSS THE NORTHEAST PLAINS WHERE LIGHT SNOW OR A MIX
OF RAIN AND SNOW EXPECTED.

THE STORM SHOULD EXIT THE STATE SATURDAY...LOWERING THE CHANCES OF
PRECIPITATION AT THAT TIME BUT ANOTHER STORM MAY DEVELOP AND BRING
ANOTHER ROUND OF RAIN AND SNOW TO THE AREA SATURDAY NIGHT AND INTO
EARLY NEXT WEEK. TEMPERATURES WILL BE WELL BELOW NORMAL THROUGHOUT
THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

$$
BAKER/GIMMESTAD



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