Alert archive / Tennessee / Flash Flood Warnings in 2022

Flash Flood Warning 50, NWS Morristown, TN

September 4, 2022Bledsoe County, Sequatchie County, Tennessee

NWS Morristown, TN issued this flash flood warning at Sep 4, 2022, 5:25 AM CDT for Bledsoe County, Sequatchie County, Tennessee. 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: Sep 4, 2022, 5:25 AM CDT (10:25 UTC)
Expired: Sep 4, 2022, 10:00 AM CDT
In force: 5 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Bledsoe County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 94 km from the middle of the area, began a volume at 10:28 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 00:00Z, 10.4 hours before the alert went out and 137 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: 236 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.1

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 Sep 4, 3:09 AM CDT, 2 hours 16 minutes earlier.

Area forecast discussion, Sep 4, 3:09 AM CDT, 2 hours 16 minutes before

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Hazardous weather outlook, Sep 4, 3:10 AM CDT, 2 hours 15 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
410 AM EDT Sun Sep 4 2022

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-050830-
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-
410 AM EDT Sun Sep 4 2022 /310 AM CDT Sun Sep 4 2022/

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

.DAY ONE...Today and Tonight

Periods of heavy rainfall are expected from this morning
through tonight. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations. A
Flood Watch is in effect for portions of the area.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

The potential for storms to produce heavy rain and flooding will
continue through Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time, but any reports of
flooding are appreciated.

TD/DGS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 1:44 AM CDT	Areal Flood Advisory	MRX	Morgan, Scott	3 hr
Sep 4, 2:02 AM CDT	Flood Watch	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	41 hr
Sep 4, 7:37 AM CDT	Areal Flood Advisory	MRX	Marion	3 hr
Sep 4, 9:32 AM CDT	Flash Flood Warning	MRX	Bledsoe, Rhea	3 hr
Sep 4, 6:22 PM CDT	Areal Flood Advisory	MRX	Claiborne	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.