Alert archive / North Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 13, NWS Morristown, TN
NWS Morristown, TN issued this areal flood advisory at Mar 25, 2021, 7:57 PM EDT for Polk County, Tennessee; Cherokee County, Clay County, North Carolina. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Mar 25, 2021, 7:57 PM EDT (23:57 UTC)
- Expired
- Mar 25, 2021, 11:47 PM EDT
- In force
- 4 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Cherokee County, NC, Clay County, NC, Polk County, TN
The radar
The Knoxville radar (KMRX), 135 km from the middle of the area, began a volume at 23:57 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, 12.0 hours before the alert went out and 196 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
- 1602 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 397 m²/s²
- 0-3 km storm-relative helicity
- 647 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this areal flood advisory 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 advisory went out at Mar 25, 7:42 PM EDT, 15 minutes earlier.
Area forecast discussion, Mar 25, 7:42 PM EDT, 15 minutes before
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</html>Hazardous weather outlook, Mar 25, 2:44 PM EDT, 5 hours 13 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 244 PM EDT Thu Mar 25 2021 NCZ061-TNZ014>018-037>047-070-073-074-VAZ001-002-005-006-008- 261845- Clay-Claiborne-Hancock-Hawkins-Sullivan-Johnson-Union-Grainger- Hamblen-Northwest Cocke-Cocke Smoky Mountains-Northwest Greene- Southeast Greene-Washington-Unicoi-Northwest Carter- Southeast Carter-Jefferson-North Sevier-Sevier Smoky Mountains- Lee-Wise-Scott-Russell- 244 PM EDT Thu Mar 25 2021 This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...This Afternoon and Tonight Severe thunderstorms are possible this afternoon and tonight with moderate to heavy rainfall expected. The primary hazards will be damaging winds. However, there remains a threat for a few tornadoes this evening and tonight, and a few of the stronger storms could have damaging hail. There is a threat for localized flash flooding as rainfall rates will be high. See the Flash Flood Watch for additional information. Strong winds are also expected across the area this afternoon into tonight with gusts likely in excess of 40 mph area-wide. See the Wind Advisory for additional information. Damaging winds are expected in the Tennessee mountains and adjacent foothills this afternoon into tonight where gusts will likely exceed 70 mph. See the High Wind Warning for additional information. .DAYS TWO THROUGH SEVEN...Friday through Thursday There could be some storms Saturday afternoon and evening, a few strong. Heavy rains could cause some isolated flooding problems Saturday night into Sunday morning. .SPOTTER INFORMATION STATEMENT... Spotter reports will be needed this afternoon into tonight. NCZ060-TNZ012-013-035-036-067>069-071-072-081>087-098>102-261845- Cherokee-Scott-Campbell-Morgan-Anderson-Roane-Loudon-Knox- Northwest Blount-Blount Smoky Mountains-Sequatchie-Bledsoe-Rhea- Meigs-McMinn-Northwest Monroe-Southeast Monroe-Marion-Hamilton- Bradley-West Polk-East Polk- 244 PM EDT Thu Mar 25 2021 /144 PM CDT Thu Mar 25 2021/ This Hazardous Weather Outlook is for portions of southwest North Carolina and east Tennessee. .DAY ONE...This Afternoon and Tonight There remains a threat for a tornadoes late this afternoon and into tonight, a few possibly isolated strong tornadoes. Also, some storms will have damaging storm winds, and damaging hail from the strongest storms. There is a threat for localized flash flooding as rainfall rates will be high. See the Flash Flood Watch for additional information. Strong winds are also expected across the area this afternoon into tonight with gusts likely in excess of 40 mph area-wide. See the Wind Advisory for additional information. Damaging winds are expected in the Tennessee mountains and adjacent foothills this afternoon into tonight where gusts will likely exceed 70 mph. See the High Wind Warning for additional information. .DAYS TWO THROUGH SEVEN...Friday through Thursday There could be some strong to possibly severe storms on and near the Plateau Saturday afternoon and into Saturday evening. Heavy rains could cause some isolated flooding problems Saturday night into Sunday morning. .SPOTTER INFORMATION STATEMENT... Spotter reports will be needed this afternoon into tonight.
In the hours before
Local storm report, Mar 25, 2:12 PM EDT, 5 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
212 PM EDT THU MAR 25 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0211 PM FLASH FLOOD 4 NW EAST BRAINERD 35.05N 85.16W
03/25/2021 HAMILTON TN LAW ENFORCEMENT
SEVERAL ROADWAYS ARE FLOODED AND BARRICADED
ACROSS HAMILTON COUNTY.
&&
DHSpecial weather statement, Mar 25, 4:14 PM EDT, 3 hours 43 minutes before
Special Weather Statement
National Weather Service Morristown TN
314 PM CDT Thu Mar 25 2021
TNZ082-252045-
Bledsoe TN-
314 PM CDT Thu Mar 25 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BLEDSOE COUNTY
UNTIL 345 PM CDT...
At 313 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Pikeville, moving northeast at 60 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Mount Crest.
LAT...LON 3571 8528 3572 8526 3575 8527 3575 8526
3576 8526 3577 8510 3576 8509 3564 8527
3567 8531
TIME...MOT...LOC 2013Z 224DEG 50KT 3571 8526
JLBLocal storm report, Mar 25, 7:02 PM EDT, 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
702 PM EDT THU MAR 25 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0645 PM FLOOD KNOXVILLE 35.97N 83.95W
03/25/2021 KNOX TN BROADCAST MEDIA
STREET FLOODING AT THE INTERSECTION OF CEDAR
BLUFF AND PARK WEST BLVD.
&&The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 3:41 AM EDT | Wind Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 24 hr |
| Mar 25, 10:22 AM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 4 days |
| Mar 25, 10:53 AM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 33 min |
| Mar 25, 11:20 AM EDT | Special Weather Statement | MRX | Bradley, Polk | 40 min |
| Mar 25, 1:03 PM EDT | Flash Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 3 hr |
| Mar 25, 2:28 PM EDT | Areal Flood Advisory | MRX | Polk | 3 hr |
| Mar 25, 2:52 PM EDT | River Flood Warning | MRX | Hamilton | 41 hr |
| Mar 25, 4:06 PM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton, Marion, Sequatchie | 86 min |
| Mar 25, 4:14 PM EDT | Special Weather Statement | MRX | Bledsoe | 31 min |
| Mar 25, 5:27 PM EDT | Flash Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 4 hr |
| Mar 25, 6:17 PM EDT | Areal Flood Advisory | MRX | Knox, Loudon | 3 hr |
| Mar 25, 7:17 PM EDT | River Flood Warning | MRX | Cocke | 32 hr |
| Mar 25, 1:02 PM EDT | Special Weather Statement | MRX | Clay | 28 min |
Nearby
Areal Flood Advisories in North Carolina, 2021Areal Flood Advisories in Tennessee, 2021Every areal flood advisory in 2021
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.