Alert archive / Nebraska / Red Flag Warnings in 2020

Red Flag Warning 22, NWS Hastings, NE

December 7, 202011 counties in Nebraska

NWS Hastings, NE issued this red flag warning at Dec 7, 2020, 3:17 AM CST for 11 counties in Nebraska. It took effect at Dec 7, 2020, 12:00 PM CST. It was in force for 5 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: Dec 7, 2020, 3:17 AM CST (09:17 UTC)
In effect from: Dec 7, 2020, 12:00 PM CST
Expired: Dec 7, 2020, 5:00 PM CST
In force: 5 hr
Issued by: NWS Hastings, NE

Counties Adams County, NE, Buffalo County, NE, Dawson County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Howard County, NE, Kearney County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 83 km from the middle of the area, began a volume at 09:20 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.3 hours before the alert went out and 135 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2549 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 155 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 red flag 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 red flag warning went out at Dec 6, 11:58 PM CST, 3 hours 19 minutes earlier.

Area forecast discussion, Dec 6, 11:58 PM CST, 3 hours 19 minutes before

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Nearby

Red Flag Warnings in Nebraska, 2020 Every 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.