Alert archive / Colorado / Snow Advisories in 2006

Snow Advisory 4, NWS Denver/Boulder, CO

March 7, 200616 counties in Colorado

NWS Denver/Boulder, CO issued this snow advisory at Mar 7, 2006, 3:57 PM MST for 16 counties in Colorado. It took effect at Mar 8, 2006, 12:00 AM MST. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Mar 7, 2006, 3:57 PM MST (22:57 UTC)
In effect from
Mar 8, 2006, 12:00 AM MST
Expired
Mar 8, 2006, 9:00 PM MST
In force
21 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, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 59 km from the middle of the area, began a volume at 22:59 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.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 11.0 hours before the alert went out and 293 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2006-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2006-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
2276 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this snow 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 snow advisory went out at Mar 7, 3:30 PM MST, 27 minutes earlier.

Area forecast discussion, Mar 7, 3:30 PM MST, 27 minutes before
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Hazardous weather outlook, Mar 7, 11:19 AM MST, 4 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1119 AM MST TUE MAR 07 2006

COZ030>051-081300-
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-
1119 AM MST TUE MAR 07 2006

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

.DAY ONE...TODAY AND TONIGHT

WINDY...WARM AND DRY CONDITIONS WILL PERSIST EAST OF THE CONTINENTAL
DIVIDE FOR THE REST OF TODAY. ALTHOUGH WIND SPEEDS SHOULD GRADUALLY
DIMINISH THROUGH THE AFTERNOON...WITH GUSTS LOWERING TO LESS THAN
30 MPH BY LATE THIS AFTERNOON. A RED FLAG WARNING WILL CONTINUE IN
EFFECT UNTIL 6 P.M. TODAY FOR THE FRONT RANGE FOOTHILLS...THE PALMER
DIVIDE AND THE NORTHEAST PLAINS OF COLORADO.

IN THE MOUNTAINS...SCATTERED SNOW SHOWERS WILL DEVELOP THIS
AFTERNOON ALONG WITH ISOLATED RAIN AND SNOW SHOWERS IN THE HIGH
MOUNTAIN PARKS.

TONIGHT...SNOW WILL BECOME MORE WIDESPREAD IN THE MOUNTAINS AS A
FAIRLY POTENT PACIFIC STORM SYSTEM MOVES INTO THE STATE. SEVERAL
INCHES OF SNOW SHOULD ACCUMULATE BY MORNING...BUT IT DOES NOT APPEAR
WIND AND BLOWING SNOW WILL BE A PROBLEM FOR MOUNTAIN TRAVELERS. EAST
OF THE MOUNTAINS...DRY AND BREEZY CONDITIONS THIS EVENING WILL
SLOWLY GIVE WAY TO LOW CLOUDS AND SCATTERED SNOW SHOWERS SEVERAL
HOURS AFTER MIDNIGHT....AND MAINLY IN AND NEAR THE FRONT RANGE
FOOTHILLS. HOWEVER ACCUMULATING SNOWFALL IS NOT EXPECTED IN THESE
AREAS UNTIL WEDNESDAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SNOW WILL CONTINUE IN THE HIGH COUNTRY THROUGH WEDNESDAY...WHERE
ANOTHER 2 TO 6 INCHES OF SNOW CAN BE EXPECTED DURING THE DAY.  SNOW
WILL ALSO SPREAD EASTWARD ACROSS THE PLAINS WEDNESDAY MORNING AND
CONTINUE THROUGH THE AFTERNOON.  TOTAL ACCUMULATIONS OF 2 TO 6
INCHES OF SNOW WILL BE POSSIBLE ACROSS THE PLAINS...WITH THE
HEAVIEST AMOUNTS WEST OF INTERSTATE 25.  HEAVIER ACCUMULATIONS CAN
BE EXPECTED IN THE FRONT RANGE FOOTHILLS WHERE 4 TO 10 INCHES OF
SNOW WILL POSSIBLE.

FOR THURSDAY THROUGH MONDAY...PERIODS OF SNOW WILL CONTINUE IN THE
MOUNTAINS WITH SEVERAL INCHES OF ADDITIONAL ACCUMULATION.  ON THE
PLAINS...THE HIGHEST THREAT OF ACCUMULATING SNOW IS EXPECTED FRIDAY
AND FRIDAY NIGHT...AND THEN AGAIN MONDAY.

A LARGE STORM SYSTEM SETTLING OVER THE WESTERN UNITED STATES AND
EMBEDDED DISTURBANCES EJECTING ACROSS THE PLAINS WILL BRING THE
COOLER AND UNSETTLED WEATHER THROUGH EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

BAKER/BARJENBRUCH

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 7, 3:57 PM MSTWinter Storm WatchBOUBoulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 1 more29 hr

Nearby

Snow Advisories in Colorado, 2006Every snow advisory in 2006

Sources

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