Alert archive / Colorado / Red Flag Warnings in 2019

Red Flag Warning 23, NWS Grand Junction, CO

September 19, 20199 counties in Colorado; Grand County, San Juan County, Utah

NWS Grand Junction, CO issued this red flag warning at Sep 19, 2019, 2:58 PM MDT for 9 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Sep 20, 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
Sep 19, 2019, 2:58 PM MDT (20:58 UTC)
In effect from
Sep 20, 2019, 12:00 PM MDT
Expired
Sep 20, 2019, 8:18 PM MDT
In force
8 hr
Issued by
NWS Grand Junction, CO

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

The radar

The Grand Junction radar (KGJX), 90 km from the middle of the area, began a volume at 20:59 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

Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 9.0 hours before the alert went out and 395 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, Albuquerq/Krtlnd, NM at 12:00Z on 2019-09-19Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albuquerq/Krtlnd, NM at 12:00Z on 2019-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.19395878Sfc1 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
2551 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
53 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
Sep 19, 2:55 PM MDTSpecial Weather StatementGJTMontezuma35 min
Sep 19, 3:02 PM MDTSpecial Weather StatementGJTMontezuma28 min
Sep 19, 3:23 PM MDTFreeze WatchGJTMoffat, Rio Blanco, Routt24 hr
Sep 19, 3:35 PM MDTSpecial Weather StatementGJTDolores25 min
Sep 19, 5:40 PM MDTSpecial Weather StatementGJTLa Plata35 min
Sep 19, 3:03 AM MDTRed Flag WarningGJTGrand18 hr

Nearby

Red Flag Warnings in Colorado, 2019Red Flag Warnings in Utah, 2019Every 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.