Alert archive / Nebraska / Flash Flood Warnings in 2019

Flash Flood Warning 14, NWS Hastings, NE

June 18, 2019Thayer County, Nebraska

NWS Hastings, NE issued this flash flood warning at Jun 18, 2019, 5:21 PM CDT for Thayer County, Nebraska. It was in force for 2 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: Jun 18, 2019, 5:21 PM CDT (22:21 UTC)
Expired: Jun 18, 2019, 7:35 PM CDT
In force: 2 hr
Issued by: NWS Hastings, NE
Area: Storm-based polygon
Flood severity: None

County Thayer County, NE

The radar

The Grand Island radar (KUEX), 74 km from the middle of the area, began a volume at 22:21 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

Topeka, KS (KTOP), launched 12:00Z, 10.4 hours before the alert went out and 213 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: 60 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 923 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 8 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hastings, NE wrote its last area forecast discussion before this flash flood warning went out at Jun 18, 4:47 PM CDT, 34 minutes earlier.

Area forecast discussion, Jun 18, 4:47 PM CDT, 34 minutes before

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Hazardous weather outlook, Jun 18, 3:30 PM CDT, 1 hour 51 minutes before

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In the hours before

Local storm report, Jun 18, 3:10 PM CDT, 2 hours 11 minutes before

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The office that day

Everything else NWS Hastings, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 2:25 PM CDT	Flash Flood Warning	GID	Harlan	6 hr
Jun 18, 4:47 PM CDT	Areal Flood Advisory	GID	Thayer	3 hr
Jun 18, 4:50 PM CDT	River Flood Warning	GID	Harlan	12 hr

Nearby

Flash Flood Warnings in Nebraska, 2019 Every flash flood 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.