Alert archive / Colorado / Areal Flood Advisories in 2019

Areal Flood Advisory 21, NWS Denver/Boulder, CO

June 22, 2019Douglas County, Colorado

NWS Denver/Boulder, CO issued this areal flood advisory at Jun 22, 2019, 6:43 PM MDT for Douglas County, Colorado. It was in force for 92 min.

The area

The counties it named.

The facts

Issued
Jun 22, 2019, 6:43 PM MDT (00:43 UTC)
Expired
Jun 22, 2019, 8:15 PM MDT
In force
92 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon

County Douglas County, CO

The radar

The Denver radar (KFTG), 61 km from the middle of the area, began a volume at 00:43 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 (KDNR), launched 00:00Z, 0.7 hours before the alert went out and 158 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, Denver, CO at 00:00Z on 2019-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 194 joules per kilogram.LCLEL10008507005003002001001 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, Denver, CO at 00:00Z on 2019-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
194 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 23, 6:12 AM MDTRiver Flood WarningBOUJackson36 hr
Jun 23, 11:07 AM MDTSpecial Weather StatementBOUWeld23 min
Jun 23, 11:36 AM MDTSpecial Weather StatementBOUBroomfield24 min
Jun 23, 12:10 PM MDTSpecial Weather StatementBOUMorgan35 min
Jun 23, 1:15 PM MDTSpecial Weather StatementBOUMorgan30 min

Nearby

Areal Flood Advisories in Colorado, 2019Every areal flood advisory 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.