Alert archive / Colorado / Winter Weather Advisories in 2012

Winter Weather Advisory 9, NWS Denver/Boulder, CO

February 23, 201211 counties in Colorado

NWS Denver/Boulder, CO issued this winter weather advisory at Feb 23, 2012, 4:37 AM MST for 11 counties in Colorado. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Feb 23, 2012, 4:37 AM MST (11:37 UTC)
Expired
Feb 23, 2012, 11:00 AM MST
In force
6 hr
Issued by
NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Park County, CO

The radar

The Denver radar (KFTG), 43 km from the middle of the area, began a volume at 11:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this winter weather advisory went out at Feb 22, 3:20 PM MST, 13 hours 17 minutes earlier.

Area forecast discussion, Feb 22, 3:20 PM MST, 13 hours 17 minutes before
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Hazardous weather outlook, Feb 22, 11:04 AM MST, 17 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1104 AM MST WED FEB 22 2012

COZ030>051-231300-
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-
1104 AM MST WED FEB 22 2012

...HIGH WIND WARNING FRONT RANGE MOUNTAINS...FOOTHILLS...AND NEARBY
PLAINS WEST OF I-25 TIL 5 AM THURSDAY...
...WINTER STORM WARNING NORTHERN GORE AND PARK RANGE UNTIL 11 AM
THURSDAY...
...WINTER WEATHER ADVISORY NORTHERN FRONT RANGE MOUNTAINS UNTIL 11
AM THURSDAY...

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

.DAY ONE...TODAY AND TONIGHT

ACTIVE WEATHER WILL CONTINUE OVER NORTH CENTRAL COLORADO AND ALONG
THE FRONT RANGE FOOTHILLS THROUGH TONIGHT.  STRONG WINDS ARE
EXPECTED TO CONTINUE THROUGH TONIGHT AS A STRONG UPPER LEVEL JET
STREAM REMAINS IN PLACE OVER NORTHERN COLORADO.  MOISTURE IS
EXPECTED TO INCREASE OVER THE MOUNTAINS LATER THIS EVENING WHICH
WILL BRING SNOWFALL BACK INTO THE WEATHER MIX FOR THE MOUNTAIN AREAS
AS THE WIND CONTINUES.  MODERATE SNOWFALL AMOUNTS ARE EXPECTED IN
THE MOUNTAIN AREAS OVERNIGHT WHICH WILL COMBINE WITH THE WINDY
CONDITIONS TO PRODUCE HAZARDOUS TRAVEL CONDITIONS DUE TO BLOWING AND
DRIFTING SNOW.

LATE TONIGHT...A COLD FRONT WILL MOVE OVER THE NORTHEAST
PLAINS...BRINGING COLDER TEMPERATURES.  AREAS OF SNOW WILL ALSO BE
POSSIBLE OVER THE I-25 CORRIDOR BY THURSDAY MORNING.  LIGHT
ACCUMULATIONS OF SNOW WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SNOW WILL GRADUALLY DECREASE ACROSS THE MOUNTAINS AND PLAINS
THURSDAY BEHIND THE PASSAGE OF A FAST MOVING UPPER LEVEL
DISTURBANCE. IN THE MOUNTAINS...ADDITIONAL SNOWFALL AMOUNTS OF 2 TO
6 INCHES CAN BE EXPECTED THURSDAY MORNING...AND STRONG WINDS WILL
PRODUCE CONSIDERABLE BLOWING SNOW AND HAZARDOUS DRIVING CONDITIONS.
ON THE PLAINS...A BAND OF SNOW JUST BEHIND A COLD FRONT MAY BRING A
QUICK INCH OF SNOW FOR THE THURSDAY MORNING COMMUTE.

DRY CONDITIONS ARE EXPECTED FRIDAY THROUGH SATURDAY WITH WARMING
TEMPERATURES.  FROM SUNDAY THROUGH TUESDAY...AN UNSETTLED WEATHER
PATTERN MOVES IN WITH A CHANCE OF SNOW...MAINLY FOR THE MOUNTAINS.
TEMPERATURES SHOULD DROP BELOW SEASONAL NORMALS ONCE AGAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

DANKERS/RJK

Nearby

Winter Weather Advisories in Colorado, 2012Every winter weather advisory in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.