Weather Alert May 11, 2010

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
253 AM MDT MON MAY 10 2010

...SPRING STORM MAY BRING HEAVY SNOW TO THE NORTH CENTRAL
COLORADO MOUNTAINS...FRONT RANGE FOOTHILLS...AND PALMER DIVIDE...

.A STRONG SPRING STORM IS EXPECTED TO REACH COLORADO BY TUESDAY
EVENING AND THEN MOVE ACROSS THE STATE WEDNESDAY. THERE IS STILL
CONSIDERABLE UNCERTAINTY WITH THE TRACK OF THE STORM...AND ANY
VARIATION TO THIS TRACK WILL HAVE EXTREMELY LARGE IMPLICATIONS ON
TEMPERATURES AND THE AMOUNT OF SNOWFALL.

AT THIS TIME...SOME WEATHER MODELS POINT TO COLD ENOUGH AIR FOR
HEAVY SNOWFALL OVER THE URBAN CORRIDOR...WHILE OTHERS ARE WARM
ENOUGH FOR PRECIPITATION TO REMAIN IN THE FORM OF RAIN. THIS WILL
BE MONITORED CAREFULLY OVER THE NEXT 36 HOURS IN THE CASE THAT
HEAVY SNOW MAY ALSO SPREAD DOWN INTO THE BIG CITIES EAST OF THE
MOUNTAINS.

COZ033>036-102200-
/O.CON.KBOU.WS.A.0004.100512T0000Z-100513T0000Z/
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-
INCLUDING THE CITIES OF...CAMERON PASS...
LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE...
ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS...
BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE...
EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL...
INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS...
WILLIAMS FORK MOUNTAINS...WINTER PARK...ESTES PARK...GLENDEVEY...
NEDERLAND...RED FEATHER LAKES...BAILEY...CENTRAL CITY...
EVERGREEN...GEORGETOWN...IDAHO SPRINGS...WESTCREEK
253 AM MDT MON MAY 10 2010

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENING
THROUGH WEDNESDAY AFTERNOON...

A WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENING
THROUGH WEDNESDAY AFTERNOON.

* TIMING...RAIN AND SNOW WILL DEVELOP TUESDAY AFTERNOON AND IS
THEN EXPECTED TO TURN TO ALL SNOW TUESDAY EVENING. HEAVY SNOW
WILL BE POSSIBLE TUESDAY NIGHT AND WEDNESDAY MORNING...BEFORE
DECREASING BY WEDNESDAY AFTERNOON.

* ACCUMULATION/WIND...SNOW ACCUMULATIONS OF 12 TO 24 INCHES ARE
POSSIBLE. AT THIS TIME...THE HEAVIEST SNOW ACCUMULATIONS ARE
EXPECTED TO OCCUR NEAR THE WYOMING BORDER WHERE SNOWFALL AMOUNTS
MAY EXCEED 2 FEET.

* MAIN IMPACT...HEAVY WET SNOW WILL ACCUMULATE RAPIDLY TUESDAY
NIGHT INTO WEDNESDAY WITH ROAD CONDITIONS DETERIORATING
SIGNIFICANTLY MAKING TRAVEL VERY HAZARDOUS.

* OTHER IMPACTS...THE HEAVY SNOWFALL COULD DAMAGE TREES AND
POSSIBLE SOME STRUCTURES WITH ITS EXCESSIVE WEIGHT. SNOW
REMOVAL WILL BE DIFFICULT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR A
HAZARDOUS WINTER WEATHER EVENT IN AND CLOSE TO THE WATCH AREA.
SIGNIFICANT SNOW ACCUMULATIONS MAY OCCUR THAT COULD IMPACT
TRAVEL. STAY TUNED TO THE NATIONAL WEATHER SERVICE OR YOUR LOCAL
NEWS MEDIA FOR THE LATEST UPDATES AND POSSIBLE WARNING CONCERNING
THIS POTENTIAL WINTER STORM.

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
1220 PM MDT TUE MAY 11 2010

...SPRING STORM WILL BRING BRING HEAVY SNOW TO PORTIONS OF THE
NORTHERN MOUNTAINS...FRONT RANGE FOOTHILLS...AND NORTHERN URBAN
CORRIDOR...

.THE LATEST STORM IS BEGINNING TO PRODUCE SNOW AND RAIN ACROSS
THE NORTHERN MOUNTAINS AND FRONT RANGE FOOTHILLS EARLY THIS
AFTERNOON. RAIN AND SNOW WILL BECOME WIDESPREAD LATER THIS
AFTERNOON OVER MUCH OF THE NORTHEASTERN QUARTER OF COLORADO.
AT THIS TIME...THE HEAVIEST PRECIPITATION IS EXPECTED TO OCCUR
NORTH OF THE I- 70 CORRIDOR...BUT ANY DEVIATION IN STORM TRACK
WILL HAVE LARGE IMPLICATIONS ON SNOWFALL AMOUNTS ACROSS THE
FORECAST AREA. HEAVY SNOW IS LIKELY IN THE MOUNTAINS AND
FOOTHILLS OF BOULDER AND LARIMER COUNTIES...AS WELL AS THE PLAINS
OF EASTERN LARIMER AND NORTHWESTERN WELD COUNTIES.

TEMPERATURES ARE ALSO EXPECTED TO TURN COLD ENOUGH ACROSS ALL THE
URBAN CORRIDOR AND PALMER RIDGE FOR RAIN TO TURN OVER TO SNOW LATE
TONIGHT INTO EARLY WEDNESDAY MORNING. AT THIS TIME...THE HEAVIEST
PRECIPITATION IS EXPECTED TO HAVE ENDED BY THE TIME TEMPERATURES
GET COLD ENOUGH FOR SNOW...BUT 1 TO 4 INCHES OF HEAVY WET SNOW
MAY STILL ACCUMULATE ON NON PAVED AREAS. TREES AND PLANTS COULD
SUSTAIN DAMAGE.

COZ034-036-120230-
/O.CON.KBOU.WW.Y.0017.100512T0000Z-100512T1200Z/
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE...
EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE...
EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS...
MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK...BAILEY...
CENTRAL CITY...EVERGREEN...GEORGETOWN...IDAHO SPRINGS...WESTCREEK
1220 PM MDT TUE MAY 11 2010

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 6 AM MDT WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 6 AM MDT WEDNESDAY.

* TIMING...RAIN AND SNOW WILL DEVELOP THIS AFTERNOON AND TURN TO
ALL SNOW THIS EVENING. THE SNOW IS EXPECTED TO DECREASE BY
DAYBREAK WEDNESDAY.

* ACCUMULATION/WIND...SNOW ACCUMULATIONS MAY VARY GREATLY ACROSS
THE SOUTHERN FRONT RANGE FOOTHILLS. AMOUNTS FROM JUST A COUPLE
INCHES OVER SOUTHERN JEFFERSON AND DOUGLAS COUNTIES MAY
INCREASE TO AROUND 10 INCHES IN THE FOOTHILLS OF CLEAR CREEK...
GILPIN...AND NORTHERN JEFFERSON COUNTIES.

* MAIN IMPACT...HEAVY WET SNOW WILL ACCUMULATE ON ROADS TONIGHT
AND CREATE HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT SNOW WILL CAUSE TRAVEL
DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING.