Alert archive / Colorado / Wind Chill Advisories in 2009
Wind Chill Advisory 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this wind chill advisory at Dec 8, 2009, 12:53 PM MST for 11 counties in Colorado. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Dec 8, 2009, 12:53 PM MST (19:53 UTC)
- Expired
- Dec 8, 2009, 10:00 PM MST
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 78 km from the middle of the area, began a volume at 19:56 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
Denver, CO (KDNR), launched 12:00Z, 7.9 hours before the alert went out and 41 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 342 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this wind chill 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 wind chill advisory went out at Dec 8, 3:40 AM MST, 9 hours 13 minutes earlier.
Area forecast discussion, Dec 8, 3:40 AM MST, 9 hours 13 minutes before
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</html>Hazardous weather outlook, Dec 8, 10:47 AM MST, 2 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1047 AM MST TUE DEC 08 2009 COZ030>051-091300- 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- 1047 AM MST TUE DEC 08 2009 ...WINTER WEATHER ADVISORIES IN EFFECT FOR THE HIGH MOUNTAINS THROUGH TONIGHT AND THE FAR EASTERN PLAINS TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THE CURRENT WINTER STORM IS BEGINNING TO MOVE EAST AND DECREASING SNOWFALL OVER THE WESTERN METRO AREA. SNOW WILL CONTINUE TO FALL OVER THE MOUNTAINS...DECREASING ALONG THE FRONT RANGE THIS AFTERNOON BUT CONTINUING ON THE PLAINS. NORTH WINDS WILL INCREASE INTO THE 15 TO 30 MPH RANGE ON THE EASTERN PLAINS LATER THIS AFTERNOON PRODUCING SOME BLOWING AND DRIFTING SNOW. IN THE MOUNTAINS THE SNOW WILL ALSO BE DECREASING BY THIS EVENING THOUGH THE WINDS WILL SHIFT TO THE NORTHWEST AND INCREASE. WINDS GUSTING TO 45 MPH WILL CONTINUE TO PRODUCE HAZARDOUS DRIVING CONDITIONS OVER THE HIGHER PASSES TONIGHT. STORM TOTAL SNOW ACCUMULATIONS WILL RANGE FROM 2 TO 5 INCHES ON THE PLAINS WITH THE HEAVIER AMOUNTS IN LARIMER AND NORTHERN WELD COUNTIES AND THE NORTHEAST CORNER OF THE STATE. IN THE HIGHER MOUNTAINS 8 TO 14 INCHES ARE EXPECTED...WITH 3 TO 7 INCHES IN THE FOOTHILLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY LIGHT SNOW WILL LINGER IN THE MOUNTAINS ON WEDNESDAY. MOST OF THE SNOW WILL OCCUR ALONG WEST FACING SLOPES WITH MINIMAL ACCUMULATIONS. STRONG WESTERLY WINDS 25 TO 35 MPH CAN BE EXPECTED FOR WEDNESDAY AND THURSDAY...WITH GUSTS TO 65 MPH ABOVE TIMBERLINE AND ALONG EXPOSED EASTERN SLOPES. DRY WEATHER AND A SLOW WARMING TREND IS EXPECTED TOWARDS THE END OF THE WEEK ACROSS LOWER ELEVATIONS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. KRIEDERMAN/ENTREKIN
Nearby
Wind Chill Advisories in Colorado, 2009Every wind chill advisory in 2009
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.