Alert archive / Tennessee / Flood Watches in 2019

Flood Watch 2, NWS Morristown, TN

February 21, 201933 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this flood watch at Feb 21, 2019, 11:29 AM EST for 33 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It took effect at Feb 21, 2019, 7:00 PM EST. It was in force for 60 hr.

The area

The counties it named.

The facts

Issued
Feb 21, 2019, 11:29 AM EST (16:29 UTC)
In effect from
Feb 21, 2019, 7:00 PM EST
Expired
Feb 24, 2019, 7:00 AM EST
In force
60 hr
Issued by
NWS Morristown, TN
Flood severity
None
All 42 counties

Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 27 km from the middle of the area, began a volume at 16:31 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 12:00Z, 4.5 hours before the alert went out and 306 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 199 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
411 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
199 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Feb 21, 6:22 AM EST, 5 hours 7 minutes earlier.

Area forecast discussion, Feb 21, 6:22 AM EST, 5 hours 7 minutes before
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Hazardous weather outlook, Feb 21, 2:50 AM EST, 8 hours 39 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
250 AM EST Thu Feb 21 2019

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-220800-
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-NW 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-Russell-Washington-
250 AM EST Thu Feb 21 2019 /150 AM CST Thu Feb 21 2019/

This Hazardous Weather Outlook is for portions of Southwest North
Carolina...East Tennessee and Southwest Virginia.

.DAY ONE...Today and Tonight

Rainfall chances will continue today and increase tonight. With
the recent rainfall over the past weeks... streams, rivers, and
other low lying areas may see additional isolated flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Periods of moderate to heavy rain are expected across the area
Friday and Friday night, then again on Saturday night. The
heaviest rain looks to occur during the day on Friday. Since the
ground is already saturated and streams are high, flooding can be
expected.

.SPOTTER INFORMATION STATEMENT...

Spotter reports will be needed for flooding tonight through
Saturday night.

In the hours before

Local storm report, Feb 21, 6:16 AM EST, 5 hours 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 9:01 PM ESTRiver Flood WarningMRXHamilton5 days
Feb 20, 9:01 PM ESTRiver Flood WarningMRXClaiborne, Hancock5 days
Feb 20, 9:32 PM ESTRiver Flood AdvisoryMRXGrainger, Hancock36 hr
Feb 20, 9:32 PM ESTRiver Flood AdvisoryMRXHancock36 hr
Feb 21, 9:59 AM ESTRiver Flood WarningMRXGrainger, Hancock4 days
Feb 21, 9:59 AM ESTRiver Flood WarningMRXMorgan, Roane65 hr
Feb 21, 9:59 AM ESTRiver Flood WarningMRXCocke17 hr
Feb 20, 7:31 PM ESTAreal Flood AdvisoryMRXLee, Wise6 hr
Feb 20, 9:32 PM ESTRiver Flood AdvisoryMRXRussell, Scott36 hr

Nearby

Flood Watches in Tennessee, 2019Flood Watches in Virginia, 2019Flood Watches in North Carolina, 2019Every flood watch in 2019

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.