Alert archive / Colorado / Snow Advisories in 2007
Snow Advisory 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this snow advisory at Dec 27, 2007, 4:21 AM MST for 11 counties in Colorado. It took effect at Dec 27, 2007, 5:00 AM MST. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Dec 27, 2007, 4:21 AM MST (11:21 UTC)
- In effect from
- Dec 27, 2007, 5:00 AM MST
- Expired
- Dec 27, 2007, 7:43 PM MST
- In force
- 15 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Logan County, CO, Park County, CO, Phillips County, CO, Sedgwick County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 35 km from the middle of the area, began a volume at 11:18 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 00:00Z, 11.4 hours before the alert went out and 116 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
- 1918 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Dec 26, 7:41 PM MST, 8 hours 40 minutes earlier.
Area forecast discussion, Dec 26, 7:41 PM MST, 8 hours 40 minutes before
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</html>Hazardous weather outlook, Dec 26, 10:58 AM MST, 17 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1058 AM MST WED DEC 26 2007 COZ030>051-271300- 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- 1058 AM MST WED DEC 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SNOW SHOWERS WILL DEVELOP IN THE MOUNTAINS THIS AFTERNOON...BECOMING MORE WIDESPREAD TONIGHT WITH ACCUMULATIONS OF 1 TO 4 INCHES. ACROSS THE LOWER ELEVATIONS...LIGHT SNOW WILL DEVELOP LATER TONIGHT WITH ACCUMULATIONS OF UP TO AN INCH BY DAWN. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SNOW IS EXPECTED OVER THE PLAINS...FOOTHILLS...AND MOUNTAINS EAST OF THE DIVIDE ON THURSDAY...DECREASING THURSDAY EVENING. ACCUMULATIONS OF 3 TO 8 INCHES ARE POSSIBLE. NORTH WINDS UP TO 25 MPH WILL CAUSE SOME BLOWING AND DRIFTING SNOW OUT ON THE PLAINS. A CHANCE OF SNOW WILL CONTINUE OVER THE MOUNTAINS THROUGH THE WEEKEND INTO MONDAY WITH DRY CONDITIONS EXPECTED ON THE PLAINS THROUGH NEXT WEDNESDAY. TEMPERATURES LOOK TO BE BELOW NORMAL THROUGH MONDAY...THEN MODERATE SOMEWHAT INTO MID WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. DL/RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 26, 7:32 PM MST | Snow and Blowing Snow Advisory | BOU | Boulder, Larimer, Logan, Phillips, Sedgwick, Weld | 9 hr |
| Dec 26, 7:32 PM MST | Winter Storm Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more | 24 hr |
Nearby
Snow Advisories in Colorado, 2007Every snow advisory in 2007
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.