Alert archive / Colorado / Red Flag Warnings in 2016

Red Flag Warning 19, NWS Grand Junction, CO

July 17, 201618 counties in Colorado; 4 counties in Utah

NWS Grand Junction, CO issued this red flag warning at Jul 17, 2016, 9:42 PM MDT for 18 counties in Colorado; 4 counties in Utah. It took effect at Jul 18, 2016, 10:00 AM MDT. It was in force for 12 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 17, 2016, 9:42 PM MDT (03:42 UTC)
In effect from: Jul 18, 2016, 10:00 AM MDT
Expired: Jul 18, 2016, 10:00 PM MDT
In force: 12 hr
Issued by: NWS Grand Junction, CO

All 22 counties

Archuleta County, CO, Delta County, CO, Dolores County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Hinsdale County, CO, La Plata County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO, San Juan County, CO, San Miguel County, CO, Daggett County, UT, Grand County, UT, San Juan County, UT, Uintah County, UT

The radar

The Grand Junction radar (KGJX), 32 km from the middle of the area, began a volume at 03:42 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

Denver, CO (KDEN), launched 00:00Z, 3.7 hours before the alert went out and 435 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: 697 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 2716 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

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 17, 4:34 PM MDT, 5 hours 8 minutes earlier.

Area forecast discussion, Jul 17, 4:34 PM MDT, 5 hours 8 minutes before

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Hazardous weather outlook, Jul 17, 5:30 AM MDT, 16 hours 12 minutes before

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Nearby

Red Flag Warnings in Colorado, 2016 Red Flag Warnings in Utah, 2016 Every red flag warning in 2016

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.