Alert archive / Utah / Red Flag Warnings in 2020

Red Flag Warning 18, NWS Grand Junction, CO

May 30, 2020Grand County, Utah

NWS Grand Junction, CO issued this red flag warning at May 30, 2020, 2:44 PM MDT for Grand County, Utah. It took effect at May 31, 2020, 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
May 30, 2020, 2:44 PM MDT (20:44 UTC)
In effect from
May 31, 2020, 12:00 PM MDT
Expired
May 31, 2020, 8:00 PM MDT
In force
8 hr
Issued by
NWS Grand Junction, CO

County Grand County, UT

The radar

The Grand Junction radar (KGJX), 118 km from the middle of the area, began a volume at 20:47 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 12:00Z, 8.7 hours before the alert went out and 94 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, Grand Junction, CO at 12:00Z on 2020-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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, Grand Junction, CO at 12:00Z on 2020-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.1939Sfc1 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
2747 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
232 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
May 30, 1:47 PM MDTSpecial Weather StatementGJTOuray28 min
May 30, 2:09 PM MDTSpecial Weather StatementGJTMontrose36 min
May 30, 2:39 PM MDTSpecial Weather StatementGJTDelta36 min
May 30, 2:43 PM MDTSpecial Weather StatementGJTRoutt47 min
May 30, 3:03 PM MDTSpecial Weather StatementGJTMesa42 min
May 30, 4:23 PM MDTSpecial Weather StatementGJTPitkin22 min
May 30, 4:39 PM MDTSpecial Weather StatementGJTGarfield36 min
May 30, 5:39 PM MDTSpecial Weather StatementGJTSan Miguel36 min

Nearby

Red Flag Warnings in Utah, 2020Every 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.