Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 54, NWS Morristown, TN

August 1, 2026Polk County, Tennessee; Cherokee County, North Carolina

NWS Morristown, TN issued this flash flood warning at Aug 1, 2026, 11:40 PM EDT for Polk County, Tennessee; Cherokee County, North Carolina. 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
Aug 1, 2026, 11:40 PM EDT (03:40 UTC)
Expired
Aug 2, 2026, 4:45 AM EDT
In force
5 hr
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 03:44 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 00:00Z, 3.7 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2026-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1431 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2026-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.1939Sfc1 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
1431 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
986 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.6

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 8:11 PM EDTSevere Thunderstorm WarningMRXBradley, Hamilton, McMinn, Polk19 min
Aug 1, 9:01 PM EDTSpecial Weather StatementMRXPolk29 min
Aug 1, 9:17 PM EDTSevere Thunderstorm WarningMRXBradley, Hamilton43 min
Aug 1, 9:40 PM EDTSpecial Weather StatementMRXMonroe50 min
Aug 1, 9:44 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, McMinn, Monroe46 min
Aug 1, 10:00 PM EDTAreal Flood AdvisoryMRXAnderson, Campbell, Morgan, Scott5 hr
Aug 1, 10:37 PM EDTAreal Flood AdvisoryMRXBradley, Hamilton, McMinn, Polk3 hr
Aug 1, 10:52 PM EDTSpecial Weather StatementMRXPolk38 min
Aug 1, 11:24 PM EDTAreal Flood AdvisoryMRXPolk16 min
Aug 2, 1:07 AM EDTAreal Flood AdvisoryMRXCampbell, Scott, Union113 min
Aug 2, 3:01 AM EDTRiver Flood WarningMRXPolk7 hr

Nearby

Flash Flood Warnings in Tennessee, 2026Flash Flood Warnings in North Carolina, 2026Every flash flood warning in 2026

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.