Alert archive / Colorado / Red Flag Warnings in 2018

Red Flag Warning 25, NWS Grand Junction, CO

June 26, 20184 counties in Colorado; Grand County, Uintah County, Utah

NWS Grand Junction, CO issued this red flag warning at Jun 26, 2018, 2:41 PM MDT for 4 counties in Colorado; Grand County, Uintah County, Utah. It took effect at Jun 27, 2018, 12:00 PM MDT. It was in force for 3 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 26, 2018, 2:41 PM MDT (20:41 UTC)
In effect from
Jun 27, 2018, 12:00 PM MDT
Expired
Jun 27, 2018, 2:34 PM MDT
In force
3 hr
Issued by
NWS Grand Junction, CO

Counties Garfield County, CO, Mesa County, CO, Moffat County, CO, Rio Blanco County, CO, Grand County, UT, Uintah County, UT

The radar

The Grand Junction radar (KGJX), 82 km from the middle of the area, began a volume at 20:41 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.7 hours before the alert went out and 300 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.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 2018-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2018-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3712 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 4:07 AM MDTRed Flag WarningGJTMoffat16 hr
Jun 26, 2:41 PM MDTFire Weather WatchGJTArchuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more14 hr

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.