Alert archive / Tennessee / Flash Flood Warnings in 2022

Flash Flood Warning 34, NWS Morristown, TN

August 8, 2022Polk County, Tennessee; Cherokee County, North Carolina

NWS Morristown, TN issued this flash flood warning at Aug 8, 2022, 3:39 PM EDT for Polk County, Tennessee; Cherokee County, North Carolina. It was in force for 87 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 8, 2022, 3:39 PM EDT (19:39 UTC)
Expired: Aug 8, 2022, 5:06 PM EDT
In force: 87 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, NC, Polk County, TN

The radar

The Knoxville radar (KMRX), 141 km from the middle of the area, began a volume at 19:42 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.7 hours before the alert went out and 196 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: 366 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 11 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 Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at Aug 8, 2:58 PM EDT, 41 minutes earlier.

Area forecast discussion, Aug 8, 2:58 PM EDT, 41 minutes before

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Hazardous weather outlook, Aug 8, 3:00 PM EDT, 39 minutes before

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In the hours before

Special weather statement, Aug 8, 2:59 PM EDT, 40 minutes before

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The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 8, 2:59 PM EDT	Special Weather Statement	MRX	Monroe	46 min
Aug 8, 4:29 PM EDT	Areal Flood Advisory	MRX	McMinn	91 min

Nearby

Flash Flood Warnings in Tennessee, 2022 Flash Flood Warnings in North Carolina, 2022 Every flash flood warning in 2022

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.