Alert archive / Colorado / Red Flag Warnings in 2019

Red Flag Warning 9, NWS Grand Junction, CO

July 15, 20194 counties in Colorado; Grand County, Uintah County, Utah

NWS Grand Junction, CO issued this red flag warning at Jul 15, 2019, 2:24 PM MDT for 4 counties in Colorado; Grand County, Uintah County, Utah. It took effect at Jul 16, 2019, 12:00 PM MDT. It was in force for 8 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: Jul 15, 2019, 2:24 PM MDT (20:24 UTC)
In effect from: Jul 16, 2019, 12:00 PM MDT
Expired: Jul 16, 2019, 8:00 PM MDT
In force: 8 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 20:24 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, 8.4 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-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: 29 J/kg
Mixed-layer CIN: -347 J/kg
Mixed-layer LCL: 3079 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 40 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 Jul 15, 11:25 AM MDT, 2 hours 59 minutes earlier.

Area forecast discussion, Jul 15, 11:25 AM MDT, 2 hours 59 minutes before

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Hazardous weather outlook, Jul 15, 3:17 AM MDT, 11 hours 7 minutes before

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In the hours before

Local storm report, Jul 15, 2:19 PM MDT, 5 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
Jul 15, 2:24 PM MDT	Fire Weather Watch	GJT	Delta, Dolores, La Plata, Montezuma, Montrose, Ouray and 1 more	25 hr
Jul 15, 2:24 PM MDT	Red Flag Warning	GJT	Delta, Dolores, Garfield, La Plata, Mesa, Moffat and 5 more	54 hr

Nearby

Red Flag Warnings in Colorado, 2019 Red Flag Warnings in Utah, 2019 Every red flag warning in 2019

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.