Alert archive / Colorado / Red Flag Warnings in 2018
Red Flag Warning 19, NWS Grand Junction, CO
NWS Grand Junction, CO issued this red flag warning at Jun 18, 2018, 2:10 AM MDT for 6 counties in Colorado; Grand County, Uintah County, Utah. It took effect at Jun 18, 2018, 11:00 AM MDT. It was in force for 9 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
- Jun 18, 2018, 2:10 AM MDT (08:10 UTC)
- In effect from
- Jun 18, 2018, 11:00 AM MDT
- Expired
- Jun 18, 2018, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Grand Junction, CO
Counties Garfield County, CO, Mesa County, CO, Moffat County, CO, Montrose County, CO, Rio Blanco County, CO, San Miguel County, CO, Grand County, UT, Uintah County, UT
The radar
The Grand Junction radar (KGJX), 44 km from the middle of the area, began a volume at 08:10 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, 8.2 hours before the alert went out and 24 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
- 325 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 2346 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this red flag 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 red flag warning went out at Jun 17, 4:56 PM MDT, 9 hours 14 minutes earlier.
Area forecast discussion, Jun 17, 4:56 PM MDT, 9 hours 14 minutes before
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</html>Hazardous weather outlook, Jun 17, 2:28 AM MDT, 23 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 228 AM MDT Sun Jun 17 2018 COZ001>014-017>023-UTZ022>025-027>029-181100- Lower Yampa River Basin-Central Yampa River Basin- Roan and Tavaputs Plateaus-Elkhead and Park Mountains- Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor- Central Colorado River Basin-Grand and Battlement Mesas- Gore and Elk Mountains/Central Mountain Valleys- Central Gunnison and Uncompahgre River Basin- West Elk and Sawatch Mountains-Flat Tops- Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide- Northwest San Juan Mountains-Southwest San Juan Mountains- Paradox Valley/Lower Dolores River- Four Corners/Upper Dolores River-Animas River Basin- San Juan River Basin-Southeast Utah-Eastern Uinta Mountains- Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat- La Sal and Abajo Mountains-Canyonlands/Natural Bridges- 228 AM MDT Sun Jun 17 2018 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Deep moisture remains in place today with scattered showers continuing through the morning hours. Thunderstorms will continue over southwest Colorado and track towards the 416 Fire this morning, causing concerns for flash flooding. Flash flooding concerns lessen by late morning into the afternoon, but locally heavy rainfall will remain possible as storms redevelop across much of the area this afternoon. Drier air moves in from the west and southwest late afternoon into the evening, pushing shower activity towards the northeast and out of the region by midnight. Temperatures will be much cooler today due to increased clouds and showers. .DAYS TWO THROUGH SEVEN...Monday through Saturday Dry conditions remain Monday through mid-week with afternoon storms possible late next week, favoring the higher terrain. Temperatures will make a return towards normal next week as conditions dry out. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected today or tonight, however spotters are encouraged to relay rainfall amounts or any observed flooding to the National Weather Service in Grand Junction.
Nearby
Red Flag Warnings in Colorado, 2018Red Flag Warnings in Utah, 2018Every red flag warning in 2018
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.