Alert archive / Tennessee / Flash Flood Warnings in 2023

Flash Flood Warning 12, NWS Morristown, TN

July 6, 2023Morgan County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 6, 2023, 1:01 PM EDT for Morgan County, Tennessee. It was in force for 4 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 6, 2023, 1:01 PM EDT (17:01 UTC)
Expired
Jul 6, 2023, 5:00 PM EDT
In force
4 hr
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Flood severity
None

County Morgan County, TN

The radar

The Knoxville radar (KMRX), 112 km from the middle of the area, began a volume at 17:03 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, 5.0 hours before the alert went out and 175 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 2023-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 495 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 2023-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
495 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
919 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
47 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 6, 11:01 AM EDT, 2 hours earlier.

Area forecast discussion, Jul 6, 11:01 AM EDT, 2 hours before
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Hazardous weather outlook, Jul 6, 3:36 AM EDT, 9 hours 25 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
336 AM EDT Thu Jul 6 2023

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-070745-
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-
336 AM EDT Thu Jul 6 2023 /236 AM CDT Thu Jul 6 2023/

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

.DAY ONE...Today and Tonight

Scattered storms will redevelop this afternoon across the Plateau
and western sections of the Tennessee valley then move east into
the rest of the area. Main concern with these storms will be
locally heavy rainfall with isolated flash flooding possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Scattered showers and thunderstorms are expected through early
next week. Isolated stronger storms are possible, in addition to
localized flash flooding due to repeated rainfall from slow-
moving or training storms. While the potential exists each day,
the risk for strong to severe storms is elevated on Sunday with
an elevated flooding concern on Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 12:42 PM EDTAreal Flood AdvisoryMRXMorgan3 hr
Jul 6, 1:57 PM EDTAreal Flood AdvisoryMRXRhea, Roane3 hr
Jul 6, 2:19 PM EDTSpecial Weather StatementMRXMcMinn26 min
Jul 6, 2:20 PM EDTFlash Flood WarningMRXRhea3 hr
Jul 6, 3:57 PM EDTSpecial Weather StatementMRXHamblen33 min
Jul 6, 7:17 PM EDTSpecial Weather StatementMRXHamilton43 min
Jul 6, 7:59 PM EDTSpecial Weather StatementMRXHamilton31 min

Nearby

Flash Flood Warnings in Tennessee, 2023Every flash flood warning in 2023

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.