Alert archive / Tennessee / Flash Flood Warnings in 2022

Flash Flood Warning 37, NWS Morristown, TN

August 10, 2022Hamilton County, Marion County, Tennessee

NWS Morristown, TN issued this flash flood warning at Aug 10, 2022, 11:02 AM EDT for Hamilton County, Marion County, Tennessee. It was in force for 6 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 10, 2022, 11:02 AM EDT (15:02 UTC)
Expired: Aug 10, 2022, 5:15 PM EDT
In force: 6 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Hamilton County, TN, Marion County, TN

The radar

The Northeast Alabama radar (KHTX), 68 km from the middle of the area, began a volume at 15:03 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, 3.0 hours before the alert went out and 154 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: 560 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 806 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 10 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 10, 10:25 AM EDT, 37 minutes earlier.

Area forecast discussion, Aug 10, 10:25 AM EDT, 37 minutes before

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Hazardous weather outlook, Aug 10, 4:18 AM EDT, 6 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
418 AM EDT Wed Aug 10 2022

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-110830-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott VA-Russell-Washington VA-
418 AM EDT Wed Aug 10 2022 /318 AM CDT Wed Aug 10 2022/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...Today and Tonight

More widespread coverage of showers and thunderstorms is expected
today. With abundant moisture and potential for heavy rain,
localized flash flooding will possible today and into this
evening. Also, strong gusty winds remain possible from strong
storms.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

On Thursday, in southeast Tennessee and southwestern North
Carolina, isolated flash flooding is possible, as well as gusty
thunderstorm winds that could knock down a few trees.

No hazardous weather is forecast for the remainder of this period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected. However, reports of storm
damage, such as downed trees, are appreciated, as well as reports
of flooding.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 3:53 AM EDT	Flood Watch	MRX	Campbell, Claiborne, Hancock, Scott	20 hr
Aug 10, 10:25 AM EDT	Areal Flood Advisory	MRX	Hamilton, Marion	3 hr
Aug 10, 10:28 AM EDT	Areal Flood Advisory	MRX	Hamilton, Meigs, Rhea	2 hr
Aug 10, 10:58 AM EDT	Flash Flood Warning	MRX	Bradley, Hamilton, Meigs, Rhea	3 hr
Aug 10, 11:58 AM EDT	Flash Flood Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	4 hr
Aug 10, 1:29 PM EDT	Special Weather Statement	MRX	Knox	61 min
Aug 10, 2:21 PM EDT	Areal Flood Advisory	MRX	Jefferson, Sevier	114 min
Aug 10, 3:12 PM EDT	Areal Flood Advisory	MRX	Cocke, Greene	2 hr
Aug 10, 3:15 PM EDT	Special Weather Statement	MRX	Hamblen	45 min
Aug 10, 3:31 PM EDT	Flash Flood Warning	MRX	Cocke, Greene	3 hr
Aug 10, 3:48 PM EDT	Special Weather Statement	MRX	Greene, Hawkins, Washington	57 min
Aug 10, 3:53 PM EDT	Areal Flood Advisory	MRX	Greene, Hamblen, Hawkins	3 hr
Aug 10, 4:08 PM EDT	Areal Flood Advisory	MRX	Carter, Greene, Sullivan, Unicoi, Washington	2 hr
Aug 10, 4:15 PM EDT	Flash Flood Warning	MRX	Greene, Hamblen, Hawkins	3 hr
Aug 10, 4:25 PM EDT	Special Weather Statement	MRX	Carter, Johnson, Sullivan	65 min
Aug 10, 4:42 PM EDT	Flash Flood Warning	MRX	Carter, Sullivan, Unicoi, Washington	3 hr
Aug 10, 5:21 PM EDT	Flash Flood Warning	MRX	Carter, Johnson, Sullivan	3 hr
Aug 10, 1:50 PM EDT	Flash Flood Warning	MRX	Wise, City of Norton	3 hr
Aug 10, 5:56 PM EDT	Areal Flood Advisory	MRX	Russell, Washington, Wise	3 hr

Nearby

Flash Flood Warnings in Tennessee, 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.