Alert archive / Colorado / Blizzard Warnings in 2010
Blizzard Warning 1, NWS Grand Junction, CO
NWS Grand Junction, CO issued this blizzard warning at Jan 20, 2010, 4:09 PM MST for 10 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Jan 21, 2010, 6:00 AM MST. It was in force for 28 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
- Jan 20, 2010, 4:09 PM MST (23:09 UTC)
- In effect from
- Jan 21, 2010, 6:00 AM MST
- Expired
- Jan 22, 2010, 10:09 AM MST
- In force
- 28 hr
- Issued by
- NWS Grand Junction, CO
Counties Archuleta County, CO, Dolores County, CO, Gunnison County, CO, Hinsdale County, CO, La Plata 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), 128 km from the middle of the area, began a volume at 23:15 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, 11.2 hours before the alert went out and 138 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
- 1228 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 364 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 Jan 20, 3:58 PM MST, 11 minutes earlier.
Area forecast discussion, Jan 20, 3:58 PM MST, 11 minutes before
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</html>Hazardous weather outlook, Jan 20, 3:38 PM MST, 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GRAND JUNCTION CO 338 PM MST WED JAN 20 2010 COZ001>014-017>023-UTZ022>025-027>029-211300- 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- 338 PM MST WED JAN 20 2010 ...STORMY WEATHER PATTERN TO CONTINUE THROUGH THE WEEK... ...BLIZZARD...WINTER STORM WARNINGS...ADVISORIES AND WATCHES HAVE BEEN ISSUED FOR THURSDAY AND FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SNOW WILL CONTINUE OVER THE CENTRAL COLORADO PLATEAUS AND NORTHWEST SAN JUAN MOUNTAINS LATE THIS AFTERNOON AND EARLY EVENING. SNOW FALL WILL DIMINISH FROM WEST TO EAST THIS EVENING. FOR THE LATEST STORM UPDATES...VISIT WEATHER.GOV/GJT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY HAZARDOUS WINTER WEATHER CONDITIONS WILL CONTINUE ACROSS THE AREA... AND SNOW AND STRONG WINDS WILL IMPACT ALL ROADS...ESPECIALLY THE HIGH MOUNTAIN PASSES. EXPECT BLIZZARD CONDITIONS OVER THE MOUNTAINS OF SOUTHWEST COLORADO AND SOUTHEAST UTAH THURSDAY AFTERNOON THROUGH FRIDAY. HEAVY SNOW WILL FALL OVER THE WEST CENTRAL COLORADO MOUNTAINS...SOUTHERN VALLEYS AND CENTRAL PLATEAUS OF EASTERN UTAH AND COLORADO. EXPECT LESS SNOWFALL OVER THE NORTHERN MOUNTAINS. AREAS OF SNOWFALL WILL SLOWLY DECREASE SUNDAY AND MONDAY OVER CENTRAL AND NORTHWEST COLORADO. ANOTHER STORM WILL BRING AN INCREASE IN WINTER WEATHER TUESDAY. .SPOTTER INFORMATION STATEMENT SPOTTER ACTIVATION IS NOT ANTICIPATED...BUT SPOTTERS ARE ENCOURAGED TO REPORT ANY NEW SNOWFALL TO THE NATIONAL WEATHER SERVICE IN GRAND JUNCTION. TGJT
In the hours before
Local storm report, Jan 20, 11:08 AM MST, 5 hours 1 minute before
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</html>Local storm report, Jan 20, 11:18 AM MST, 4 hours 51 minutes before
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</html>Local storm report, Jan 20, 11:20 AM MST, 4 hours 49 minutes before
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</html>The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 19, 10:05 PM MST | Winter Storm Warning | GJT | Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more | 18 hr |
| Jan 20, 3:31 AM MST | Blizzard Watch | GJT | Archuleta, Dolores, Gunnison, Hinsdale, La Plata, Montezuma and 4 more | 13 hr |
| Jan 20, 4:09 PM MST | Winter Storm Watch | GJT | Dolores, Montezuma, San Miguel | 12 hr |
| Jan 20, 4:09 PM MST | Winter Storm Warning | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 5 days |
| Jan 20, 4:09 PM MST | Winter Weather Advisory | GJT | Dolores, Eagle, Garfield, Mesa, Moffat, Montezuma and 5 more | 60 hr |
| Jan 19, 7:56 PM MST | Dense Fog Advisory | GJT | Uintah | 8 hr |
Nearby
Blizzard Warnings in Colorado, 2010Blizzard Warnings in Utah, 2010Every blizzard warning in 2010
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.