Alert archive / Colorado / Red Flag Warnings in 2020

Red Flag Warning 31, NWS Grand Junction, CO

June 26, 202011 counties in Colorado; Grand County, San Juan County, Uintah County, Utah

NWS Grand Junction, CO issued this red flag warning at Jun 26, 2020, 1:55 PM MDT for 11 counties in Colorado; Grand County, San Juan County, Uintah County, Utah. It took effect at Jun 28, 2020, 12:00 PM 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 26, 2020, 1:55 PM MDT (19:55 UTC)
In effect from: Jun 28, 2020, 12:00 PM MDT
Expired: Jun 28, 2020, 9:00 PM MDT
In force: 9 hr
Issued by: NWS Grand Junction, CO

Counties Delta County, CO, Dolores County, CO, Garfield County, CO, La Plata County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, Rio Blanco County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT, Uintah County, UT

The radar

The Grand Junction radar (KGJX), 47 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 372 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3 J/kg
Mixed-layer CIN: -367 J/kg
Mixed-layer LCL: 2127 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 26, 11:48 AM MDT, 2 hours 7 minutes earlier.

Area forecast discussion, Jun 26, 11:48 AM MDT, 2 hours 7 minutes before

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Hazardous weather outlook, Jun 26, 3:10 AM MDT, 10 hours 45 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
Jun 25, 6:38 PM MDT	Areal Flood Advisory	GJT	Mesa	112 min
Jun 26, 3:01 PM MDT	Special Weather Statement	GJT	Garfield	44 min
Jun 26, 3:57 PM MDT	Special Weather Statement	GJT	Pitkin	33 min
Jun 26, 4:44 PM MDT	Severe Thunderstorm Warning	GJT	Eagle	31 min
Jun 26, 5:38 PM MDT	Special Weather Statement	GJT	Summit	37 min
Jun 26, 2:18 PM MDT	Special Weather Statement	GJT	Daggett	42 min
Jun 26, 4:10 PM MDT	Special Weather Statement	GJT	Grand	50 min
Jun 26, 4:24 PM MDT	Severe Thunderstorm Warning	GJT	Grand	36 min
Jun 26, 5:05 PM MDT	Special Weather Statement	GJT	Grand	40 min

Nearby

Red Flag Warnings in Colorado, 2020 Red Flag Warnings in Utah, 2020 Every red flag warning in 2020

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.