Alert archive / Tennessee / Flash Flood Warnings in 2026
Flash Flood Warning 10, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at May 30, 2026, 4:25 AM EDT for Anderson County, Morgan County, Tennessee. It was in force for 6 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
- May 30, 2026, 4:25 AM EDT (08:25 UTC)
- Expired
- May 30, 2026, 10:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Anderson County, TN, Morgan County, TN
The radar
The Knoxville radar (KMRX), 92 km from the middle of the area, began a volume at 08:26 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, 8.4 hours before the alert went out and 195 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
- 585 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 765 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 30, 1:37 AM EDT, 2 hours 48 minutes earlier. Its key messages:
- Updated at 124 AM EDT Sat May 30 2026
- Periods of showers/storms continue through Saturday morning, some of which may produce heavy rainfall and flooding.
- A drier weather pattern develops next week.
Area forecast discussion, May 30, 1:37 AM EDT, 2 hours 48 minutes before
Area Forecast Discussion
National Weather Service Morristown TN
137 AM EDT Sat May 30 2026
...New DISCUSSION, AVIATION...
.KEY MESSAGES...
Updated at 124 AM EDT Sat May 30 2026
- Periods of showers/storms continue through Saturday morning,
some of which may produce heavy rainfall and flooding.
- A drier weather pattern develops next week.
&&
.DISCUSSION...
Issued at 124 AM EDT Sat May 30 2026
Water vapor imagery shows a mid/upper low spinning over Middle/West
TN, with a negatively-tilted trough extending SE across AL/GA.
This is producing upper divergence over East TN, which will
maintain convective activity through the night in a moist air mass
of PW values near 2 inches. The HRRR shows showers and storms
increasing in coverage and intensity later tonight, around 09Z in
the northern and central TN Valley, between TYS and TRI. Rain
rates of 1-3 inches per hour will be possible where storms move
slowly or train over the same locations. Flash flooding will
continue to be a concern, especially for areas that had heavy rain
this afternoon, such as Blount/Sevier counties and
Morgan/Scott/Campbell counties. The Flood Watch will continue.
Through Saturday morning, precip will shift southward as the large
closed low over New England moves south and establishes a NW flow
across the region. This will bring drier air into the area that will
keep dry conditions into Sunday. Chance PoPs return late Sunday with
a weak shortwave trough in the NW flow. Another disturbance in the
NW flow and a southward-moving cold front brings better rain chances
on Monday.
Drier air and high pressure will move in behind the front, setting
up a drier period for Tuesday through at least Thursday, along with
temperatures near seasonal normals. Rain chances may tick back up
by Friday as moisture begins to increase again.
&&
.AVIATION...
(06Z TAFS)
Issued at 124 AM EDT Sat May 30 2026
Guidance continues to indicate a possibility of SHRA and embedded
TSRA at various times through the forecast period. Have PROB30
groups in for the most probable times for convection affecting
terminals however. In between periods of convection, MVFR CIGS
will be possible. By midday or early afternoon, northerly flow
will begin to move in, with drier air and decreasing rain chances
following by the evening.
&&
.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN 84 66 80 64 / 70 10 40 50
Knoxville McGhee Tyson Airport, TN 81 61 82 63 / 80 10 50 60
Oak Ridge, TN 81 60 81 63 / 70 0 50 60
Tri Cities Airport, TN 83 56 82 60 / 40 0 10 70
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...Flood Watch through this afternoon for Cherokee-Clay.
TN...Flood Watch through this afternoon for Anderson-Bledsoe-Blount
Smoky Mountains-Bradley-Campbell-Claiborne-Cocke Smoky
Mountains-East Polk-Grainger-Hamblen-Hamilton-Hancock-
Hawkins-Jefferson-Knox-Loudon-Marion-McMinn-Meigs-Morgan-
North Sevier-Northwest Blount-Northwest Cocke-Northwest
Greene-Northwest Monroe-Rhea-Roane-Scott TN-Sequatchie-
Sevier Smoky Mountains-Southeast Greene-Southeast Monroe-
Unicoi-Union-Washington TN-West Polk.
VA...NONE.
&&
DISCUSSION...CD
AVIATION...CDHazardous weather outlook, May 30, 4:14 AM EDT, 11 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 414 AM EDT Sat May 30 2026 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-310815- 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- 414 AM EDT Sat May 30 2026 /314 AM CDT Sat May 30 2026/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight The threat of very heavy rainfall rates and isolated flash flooding will continue through this afternoon, then diminish later today. .DAYS TWO THROUGH SEVEN...Sunday through Friday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time. However any reports of flooding would be appreciated.
In the hours before
Local storm report, May 29, 11:20 PM EDT, 5 hours 5 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
1120 PM EDT Fri May 29 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0921 PM Flash Flood 2 ESE Clover Hill 35.70N 84.04W
05/29/2026 Blount TN Law Enforcement
The right lane of US Hwy 411 South by
Ridgeway Trail closed for flooding over
roadway.
&&
NAWLocal storm report, May 30, 3:51 AM EDT, 34 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
351 AM EDT Sat May 30 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0340 AM Flash Flood 3 SW Liberty 36.11N 82.66W
05/30/2026 Greene TN Emergency Mngr
Emergency management reported flash flooding
was ongoing in the Horse Creek Recreation
area and that people were being evacuated.
&&
CEDThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:59 PM EDT | Flash Flood Warning | MRX | Blount | 4 hr |
| May 30, 2:06 AM EDT | Areal Flood Advisory | MRX | Greene, Unicoi, Washington | 3 hr |
| May 30, 3:46 AM EDT | Flash Flood Warning | MRX | Greene | 6 hr |
| May 30, 4:09 AM EDT | Areal Flood Advisory | MRX | Anderson, Morgan | 3 hr |
| May 30, 5:08 AM EDT | Flash Flood Warning | MRX | Anderson, Campbell, Morgan, Scott | 7 hr |
| May 30, 5:49 AM EDT | Flash Flood Warning | MRX | McMinn | 4 hr |
| May 30, 6:04 AM EDT | Areal Flood Advisory | MRX | Knox | 6 hr |
| May 30, 6:49 AM EDT | Areal Flood Advisory | MRX | Campbell, Morgan, Scott | 5 hr |
| May 30, 6:51 AM EDT | Areal Flood Advisory | MRX | Cocke, Jefferson, Sevier | 6 hr |
| May 30, 6:56 AM EDT | Areal Flood Advisory | MRX | Blount, Loudon | 3 hr |
| May 30, 7:58 AM EDT | Areal Flood Advisory | MRX | Blount | 6 hr |
| May 30, 8:25 AM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Knox, Loudon, Roane | 3 hr |
| May 30, 8:49 AM EDT | Flash Flood Warning | MRX | Morgan | 4 hr |
| May 30, 9:28 AM EDT | Flash Flood Warning | MRX | Blount, Loudon | 3 hr |
| May 30, 10:03 AM EDT | Areal Flood Advisory | MRX | Blount, Loudon, Monroe | 3 hr |
| May 30, 10:06 AM EDT | Areal Flood Advisory | MRX | Anderson, Morgan | 3 hr |
| May 30, 10:10 AM EDT | Areal Flood Advisory | MRX | McMinn | 3 hr |
| May 30, 12:14 PM EDT | Areal Flood Advisory | MRX | Blount, Loudon | 76 min |
Nearby
Flash Flood Warnings in Tennessee, 2026Every flash flood warning in 2026
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.