Hazardous Weather Outlook
Issued by NWS Denver/Boulder, CO

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FLUS45 KBOU 211709
HWOBOU

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1109 AM MDT THU MAY 21 2015

COZ030>051-221715-
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-
1109 AM MDT THU MAY 21 2015

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED RAIN AND SNOW SHOWERS WILL DEVELOP OVER THE MOUNTAINS
THIS AFTERNOON AND CONTINUE TONIGHT. THE SNOW LEVEL WILL
INITIALLY BE QUITE HIGH...AROUND 11000 FEET AND DROP TO NEAR 10000
FEET BY FRIDAY MORNING. SNOW ACCUMULATIONS OF 4 TO 8 INCHES CAN BE
EXPECTED OVER THE HIGH MOUNTAIN PASSES...HEAVIEST OVER NORTHERN
PARK COUNTY. THERE MAY ALSO BE SOME EMBEDDED THUNDERSTORMS WHICH
RESULT IN QUICK BURSTS OF HEAVIER SNOW.

OVER THE PLAINS...RAIN SHOWERS WILL DEVELOP TONIGHT AND CONTINUE
INTO FRIDAY MORNING. THE ARRIVAL OF THE RAIN AND SNOW ARE DUE TO
AN UPPER LEVEL STORM SYSTEM GATHERING OVER CALIFORNIA AND ARIZONA
THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

WIDESPREAD SHOWERS AND A COUPLE OF THUNDERSTORMS WILL MOVE
NORTHWARD AND EXIT MOST OF THE PLAINS BY MID DAY FRIDAY. THERE
WILL STILL BE A FEW SHOWERS AND STORMS LEFT BEHIND THE MAIN AREA
OF RAIN. TOTAL RAINFALL AMOUNTS OF ONE THIRD TO THREE QUARTERS OF
AN INCH OF RAIN CAN BE EXPECTED IN MOST AREAS...WITH A FEW SPOTS
RECEIVING AROUND 1 INCH. AT THIS TIME...THE HEAVIER AMOUNTS ARE
EXPECTED TO OCCUR FROM THE NORTHERN FOOTHILLS TOWARD THE WYOMING
BORDER AREA. WITH ALREADY SATURATED SOILS...EXPECT SOME MINOR
FLOODING OF FIELDS AND LOW LYING AREAS AGAIN WITH RISES ON SMALL
STREAMS AND RIVERS EXPECTED AS WELL.

SATURDAY AND SUNDAY ARE EXPECTED TO FEATURE MORE SHOWERS AND
THUNDERSTORMS. SOME OF THE STORMS DURING THE AFTERNOON AND EVENING
HOURS MAY BECOME SEVERE AS WIND SHEAR AND INSTABILITY INCREASE IN
THE ATMOSPHERE. THE STRONGER STORMS WILL ALSO BE CAPABLE OF
PRODUCING LOCALLY HEAVY RAINFALL AND POTENTIAL FOR ADDITIONAL
FLOODING. STREAMS AND RIVERS WILL CONTINUE TO RUN HIGH.

SCATTERED SHOWERS AND STORMS WILL LIKELY OCCUR EACH DAY THROUGH
THE MIDDLE OF NEXT WEEK. HOWEVER...TEMPERATURES SHOULD GRADUALLY
MODERATE TO MORE SEASONAL LEVELS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

$$

DANKERS/BARJENBRUCH


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