Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 33, NWS Morristown, TN

July 11, 2026Greene County, Unicoi County, Washington County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 11, 2026, 3:02 AM EDT for Greene County, Unicoi County, Washington County, Tennessee. It was in force for 3 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: Jul 11, 2026, 3:02 AM EDT (07:02 UTC)
Expired: Jul 11, 2026, 6:00 AM EDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Greene County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 73 km from the middle of the area, began a volume at 07:04 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, 7.0 hours before the alert went out and 359 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: 2377 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1061 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 60 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 Jul 11, 2:32 AM EDT, 30 minutes earlier.

Area forecast discussion, Jul 11, 2:32 AM EDT, 30 minutes before

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Hazardous weather outlook, Jul 11, 12:54 AM EDT, 2 hours 8 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
Jul 11, 2:42 AM EDT	Areal Flood Advisory	MRX	Greene, Unicoi, Washington	3 hr
Jul 11, 5:31 AM EDT	Special Weather Statement	MRX	Morgan, Scott	44 min
Jul 11, 6:33 AM EDT	Special Weather Statement	MRX	Claiborne, Grainger, Hamblen	42 min
Jul 11, 6:43 AM EDT	Special Weather Statement	MRX	Anderson, Knox	47 min
Jul 11, 7:22 AM EDT	Special Weather Statement	MRX	Greene, Hamblen, Hawkins, Washington	38 min
Jul 11, 7:25 AM EDT	Special Weather Statement	MRX	Cocke, Jefferson	50 min
Jul 11, 8:08 AM EDT	Special Weather Statement	MRX	Carter, Sullivan, Unicoi, Washington	37 min
Jul 11, 8:13 AM EDT	Special Weather Statement	MRX	Cocke	32 min
Jul 11, 8:28 AM EDT	Flash Flood Warning	MRX	Cocke, Greene	5 hr
Jul 11, 8:38 AM EDT	Special Weather Statement	MRX	Carter, Johnson	37 min
Jul 11, 9:39 AM EDT	Areal Flood Advisory	MRX	Greene, Hamblen, Hawkins, Unicoi, Washington	4 hr
Jul 11, 9:44 AM EDT	Special Weather Statement	MRX	Greene	46 min
Jul 11, 9:53 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Cocke	3 hr
Jul 11, 2:59 PM EDT	Flash Flood Warning	MRX	Greene, Unicoi, Washington	3 hr
Jul 11, 7:45 PM EDT	Special Weather Statement	MRX	Marion	45 min

Nearby

Flash Flood Warnings in Tennessee, 2026 Every 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.