Alert archive / Tennessee / Flash Flood Warnings in 2022

Flash Flood Warning 22, NWS Morristown, TN

July 25, 2022Morgan County, Roane County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 25, 2022, 7:55 PM EDT for Morgan County, Roane 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: Jul 25, 2022, 7:55 PM EDT (23:55 UTC)
Expired: Jul 26, 2022, 12:45 AM EDT
In force: 5 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Morgan County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 108 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 182 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: 1251 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 36 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 25, 7:38 PM EDT, 17 minutes earlier.

Area forecast discussion, Jul 25, 7:38 PM EDT, 17 minutes before

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Hazardous weather outlook, Jul 25, 3:36 PM EDT, 4 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
336 PM EDT Mon Jul 25 2022

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-261945-
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 PM EDT Mon Jul 25 2022 /236 PM CDT Mon Jul 25 2022/

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

.DAY ONE...This Afternoon and Tonight

Several rounds of showers and storms are expected throughout the
day. Heavy rainfall may lead to localized flash flooding across
areas that receive repeated rounds of showers and storms.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Locally heavy rainfall is expected Tuesday through Friday, and
possibly through the weekend, with any daily convection that
develops. As a result, localized flash flooding will be possible
each day. In addition, isolated damaging winds are possible each
day, mainly during the afternoon and evenings with any stronger
storms that develop.

.SPOTTER INFORMATION STATEMENT...

Reports of flooding and wind damage may be needed throughout the
week.

In the hours before

Local storm report, Jul 25, 2:14 PM EDT, 5 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
214 PM EDT MON JUL 25 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0140 PM     FLASH FLOOD      2 WNW TUSCULUM          36.19N 82.79W
07/25/2022                   GREENE             TN   911 CALL CENTER

            FLOODING IN THE GREENVILLE AREA AT THE
            INTERSECTION OF KISER BLVD AND SNAPPS FERRY
            RD, AS WELL AS OTHER LOCATIONS. SOME ROADS
            IMPASSIBLE.

&&

BW

Local storm report, Jul 25, 3:20 PM EDT, 4 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
320 PM EDT MON JUL 25 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 PM     FLOOD            4 SSW BIRD CROSSING     35.85N 83.40W
07/25/2022                   SEVIER             TN   LAW ENFORCEMENT

            FLOODING ON HWY 339. LAW ENFORCEMENT THINKS
            THE ROAD WILL NEED TO BE CLOSED DUE TO
            FLOODING.

&&

BW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 1:12 PM EDT	Areal Flood Advisory	MRX	Sevier	101 min
Jul 25, 1:17 PM EDT	Areal Flood Advisory	MRX	Greene	118 min
Jul 25, 4:54 PM EDT	Areal Flood Advisory	MRX	Hancock	3 hr
Jul 25, 6:28 PM EDT	Areal Flood Advisory	MRX	Hancock, Hawkins	3 hr
Jul 25, 6:39 PM EDT	Areal Flood Advisory	MRX	Claiborne	3 hr
Jul 25, 6:43 PM EDT	Flash Flood Warning	MRX	Claiborne	3 hr
Jul 25, 7:10 PM EDT	Areal Flood Advisory	MRX	Morgan, Roane	3 hr
Jul 25, 3:35 PM EDT	Areal Flood Advisory	MRX	Russell	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.