Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 42, NWS Morristown, TN

July 17, 20266 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 17, 2026, 3:50 PM EDT for 6 counties in Tennessee. It was in force for 97 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
Jul 17, 2026, 3:50 PM EDT (19:50 UTC)
Expired
Jul 17, 2026, 5:27 PM EDT
In force
97 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Flood severity
None

Counties Anderson County, TN, Blount County, TN, Knox County, TN, Loudon County, TN, Roane County, TN, Union County, TN

The radar

The Knoxville radar (KMRX), 69 km from the middle of the area, began a volume at 19:51 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.8 hours before the alert went out and 224 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, Nashville Metro, TN at 12:00Z on 2026-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 742 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, Nashville Metro, TN at 12:00Z on 2026-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
742 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 12:56 PM EDTSpecial Weather StatementMRXMorgan49 min
Jul 17, 1:25 PM EDTAreal Flood AdvisoryMRXAnderson, Campbell, Morgan, Scott3 hr
Jul 17, 1:53 PM EDTSpecial Weather StatementMRXMorgan52 min
Jul 17, 3:12 PM EDTAreal Flood AdvisoryMRXMonroe2 hr
Jul 17, 3:31 PM EDTAreal Flood AdvisoryMRXAnderson, Blount, Knox19 min
Jul 17, 4:02 PM EDTSpecial Weather StatementMRXMeigs43 min
Jul 17, 4:41 PM EDTSpecial Weather StatementMRXLoudon49 min
Jul 17, 4:51 PM EDTAreal Flood AdvisoryMRXLoudon, McMinn, Monroe, Roane2 hr
Jul 17, 5:19 PM EDTSpecial Weather StatementMRXRhea41 min
Jul 17, 5:37 PM EDTAreal Flood AdvisoryMRXBradley, McMinn, Monroe95 min
Jul 17, 6:11 PM EDTSpecial Weather StatementMRXMarion34 min
Jul 17, 6:30 AM EDTSpecial Weather StatementMRXSwain45 min
Jul 17, 7:15 AM EDTSpecial Weather StatementMRXSwain45 min
Jul 17, 2:50 PM EDTSpecial Weather StatementMRXCherokee40 min
Jul 17, 3:14 PM EDTSpecial Weather StatementMRXClay31 min
Jul 17, 3:45 PM EDTAreal Flood AdvisoryMRXCherokee, Clay3 hr

Nearby

Flash Flood Warnings in Tennessee, 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.