Alert archive / Colorado / Blizzard Warnings in 2009
Blizzard Warning 1, NWS Grand Junction, CO
NWS Grand Junction, CO issued this blizzard warning at Dec 5, 2009, 4:07 PM MST for 13 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Dec 7, 2009, 6:00 AM MST. It was in force for 33 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 5, 2009, 4:07 PM MST (23:07 UTC)
- In effect from
- Dec 7, 2009, 6:00 AM MST
- Expired
- Dec 8, 2009, 3:25 PM MST
- In force
- 33 hr
- Issued by
- NWS Grand Junction, CO
Counties Archuleta County, CO, Delta County, CO, Dolores County, CO, Garfield County, CO, Gunnison County, CO, Hinsdale County, CO, La Plata County, CO, Mesa County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, San Juan County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT
The radar
The Grand Junction radar (KGJX), 100 km from the middle of the area, began a volume at 23:07 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, 11.1 hours before the alert went out and 112 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
- 2374 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 429 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this blizzard warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before this blizzard warning went out at Dec 5, 3:37 PM MST, 30 minutes earlier.
Area forecast discussion, Dec 5, 3:37 PM MST, 30 minutes before
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</html>Hazardous weather outlook, Dec 5, 5:45 AM MST, 10 hours 22 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 545 AM MST SAT DEC 5 2009 COZ001>014-017>023-UTZ022>025-027>029-061300- ANIMAS RIVER BASIN-ARCHES/GRAND FLAT-CANYONLANDS/NATURAL BRIDGES- CENTRAL COLORADO RIVER BASIN- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- CENTRAL YAMPA RIVER BASIN-DEBEQUE TO SILT CORRIDOR- EASTERN UINTA BASIN-EASTERN UINTA MOUNTAINS- ELKHEAD AND PARK MOUNTAINS-FLAT TOPS- FOUR CORNERS/UPPER DOLORES RIVER- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAINS-GRAND AND BATTLEMENT MESAS- GRAND VALLEY-LA SAL AND ABAJO MOUNTAINS-LOWER YAMPA RIVER BASIN- NORTHWEST SAN JUAN MOUNTAINS-PARADOX VALLEY/LOWER DOLORES RIVER- ROAN AND TAVAPUTS PLATEAUS-SAN JUAN RIVER BASIN-SOUTHEAST UTAH- SOUTHWEST SAN JUAN MOUNTAINS-TAVAPUTS PLATEAU- UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE-UPPER GUNNISON RIVER VALLEY- UPPER YAMPA RIVER BASIN-WEST ELK AND SAWATCH MOUNTAINS- 545 AM MST SAT DEC 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT A COLD WINTER STORM WILL SPREAD SNOW ACROSS NORTHEAST UTAH LATE THIS AFTERNOON...AND WESTERN COLORADO THIS EVENING. IN ADDITION...GUSTY SOUTHWEST MOUNTAIN WINDS OF 10 TO 20 MPH WITH GUSTS TO 30 MPH WILL DEVELOP TODAY AND CONTINUE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY BY SUNDAY EVENING 6 TO 12 INCHES OF NEW SNOW IS EXPECTED IN THE NORTHERN...AND PORTIONS OF THE CENTRAL...MOUNTAINS. LOCAL BLOWING AND DRIFTING SNOW WILL OCCUR MAINLY ON NORTH-FACING SLOPES. A MUCH STRONGER STORM THEN ARRIVES ON MONDAY AND CONTINUES INTO TUESDAY AND TUESDAY NIGHT. A THIRD STORM WILL AFFECT THE REGION STARTING ON THURSDAY. FOR ADDITIONAL DETAILS ON THIS SERIES OF WINTER STORMS...PLEASE VISIT THE NATIONAL WEATHER SERVICE GRAND JUNCTION WEBSITE AT WEATHER.GOV/GJT FOR THE LATEST INFORMATION. .SPOTTER INFORMATION STATEMENT SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT THOUGH SPOTTERS ARE ENCOURAGED TO REPORT ANY STRONG WIND GUSTS OR SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE IN GRAND JUNCTION. JOE/NL
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 5, 4:26 AM MST | Blizzard Watch | GJT | Archuleta, Delta, Dolores, Gunnison, Hinsdale, La Plata and 6 more | 12 hr |
| Dec 5, 4:26 AM MST | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 9 more | 45 hr |
Nearby
Blizzard Warnings in Colorado, 2009Blizzard Warnings in Utah, 2009Every blizzard warning 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.