Alert archive / Tennessee / Areal Flood Warnings in 2018
Areal Flood Warning 13, NWS Morristown, TN
NWS Morristown, TN issued this areal flood warning at Feb 28, 2018, 4:45 PM EST for 4 counties in Tennessee. It was in force for 9 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
- Feb 28, 2018, 4:45 PM EST (21:45 UTC)
- Expired
- Mar 1, 2018, 1:45 AM EST
- In force
- 9 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bradley County, TN, Hamilton County, TN, Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 81 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 216 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 609 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 247 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal 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 areal flood warning went out at Feb 28, 3:18 PM EST, 1 hour 27 minutes earlier.
Area forecast discussion, Feb 28, 3:18 PM EST, 1 hour 27 minutes before
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</html>Hazardous weather outlook, Feb 28, 3:46 AM EST, 12 hours 59 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 346 AM EST Wed Feb 28 2018 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-010900- 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- 346 AM EST Wed Feb 28 2018 /246 AM CST Wed Feb 28 2018/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...Today and Tonight Widespread showers are expected through tonight with periods of moderate to to locally heavy rain. A flood goes into effect for portions of East Tennessee, Southwest North Carolina, as well as the Cumberland Plateau this afternoon. With the ground already soaked from the recent rains, flooding of low-lying areas, creeks, and rivers will be possible. In response to area wide heavy rain, some larger rivers may also rise toward flood stage by tonight. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Moderate to heavy showers will continue Thursday before ending by evening as the flood watch will remain in effect through Thursday evening. Continued heavy rains could result in additional flooding of low-lying areas, creeks and rivers through Thursday evening. As rainfall ends, some area rivers may also reach flood stage by Thursday night. Building high pressure Thursday night will bring strong, gusty winds across much of the area. Higher elevations of southwest Virginia and northeast Tennessee may see gusts in excess of 40 mph before winds taper off during the day on Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 11:19 AM EST | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 3 days |
| Feb 28, 11:19 AM EST | River Flood Warning | MRX | Hamilton | 68 hr |
| Feb 28, 11:33 AM EST | Areal Flood Advisory | MRX | Hamilton, Marion, Sequatchie | 3 hr |
Nearby
Areal Flood Warnings in Tennessee, 2018Every areal flood warning in 2018
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.