Alert archive / Colorado / Blizzard Warnings in 2013
Blizzard Warning 1, NWS Grand Junction, CO
NWS Grand Junction, CO issued this blizzard warning at Apr 7, 2013, 9:34 PM MDT for 5 counties in Colorado; Daggett County, Grand County, Uintah County, Utah. It took effect at Apr 8, 2013, 3:00 PM MDT. It was in force for 31 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
- Apr 7, 2013, 9:34 PM MDT (03:34 UTC)
- In effect from
- Apr 8, 2013, 3:00 PM MDT
- Expired
- Apr 9, 2013, 10:02 PM MDT
- In force
- 31 hr
- Issued by
- NWS Grand Junction, CO
Counties Garfield County, CO, Mesa County, CO, Moffat County, CO, Rio Blanco County, CO, Routt County, CO, Daggett County, UT, Grand County, UT, Uintah County, UT
The radar
The Grand Junction radar (KGJX), 104 km from the middle of the area, began a volume at 03:34 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 00:00Z, 3.6 hours before the alert went out and 93 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
- 3656 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 64 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 Apr 7, 4:52 PM MDT, 4 hours 42 minutes earlier.
Area forecast discussion, Apr 7, 4:52 PM MDT, 4 hours 42 minutes before
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</html>Hazardous weather outlook, Apr 7, 5:57 AM MDT, 15 hours 37 minutes before
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
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 9:34 PM MDT | Winter Storm Warning | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 48 hr |
| Apr 7, 9:34 PM MDT | Winter Weather Advisory | GJT | Archuleta, Dolores, Garfield, La Plata, Mesa, Montezuma and 4 more | 48 hr |
| Apr 8, 4:48 AM MDT | Freeze Warning | GJT | Delta, Garfield, Gunnison, Mesa, Montrose | 52 hr |
| Apr 8, 4:48 AM MDT | Wind Advisory | GJT | Archuleta, Dolores, La Plata, Mesa, Montezuma, Montrose and 1 more | 16 hr |
| Apr 7, 9:38 PM MDT | High Wind Warning | GJT | Uintah | 18 hr |
| Apr 8, 3:16 PM MDT | Wind Advisory | GJT | Grand, San Juan, Uintah | 26 hr |
Nearby
Blizzard Warnings in Colorado, 2013Blizzard Warnings in Utah, 2013Every blizzard warning in 2013
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.