Alert archive / Tennessee / Flash Flood Warnings in 2026
Flash Flood Warning 7, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at May 28, 2026, 7:27 AM EDT for Cocke County, Greene County, Tennessee. It was in force for 7 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 28, 2026, 7:27 AM EDT (11:27 UTC)
- Expired
- May 28, 2026, 2:30 PM EDT
- In force
- 7 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cocke County, TN, Greene County, TN
The radar
The Knoxville radar (KMRX), 51 km from the middle of the area, began a volume at 11:28 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 8:13 AM EDT | FLASH FLOOD | 4 Ese Parrottsville, TN | Rapid moving water over Happy Hollow Road and Peanut Road. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 46 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 11.5 hours before the alert went out and 269 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
- 166 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted.
938
WGUS54 KMRX 281127
FFWMRX
TNC029-059-281530-
/O.NEW.KMRX.FF.W.0007.260528T1127Z-260528T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
727 AM EDT Thu May 28 2026
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Northeastern Cocke County in east Tennessee...
Southwestern Greene County in east Tennessee...
* Until 1130 AM EDT.
* At 727 AM EDT, Local law enforcement reported thunderstorms
producing heavy rain across the warned area have lead to several
roads with flash flooding occurring. Between 2 and 4 inches of
rain have fallen. Additional rainfall amounts up to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Cedar Creek and Caney Branch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3603 8301 3607 8307 3609 8302 3599 8278
3598 8279 3597 8278 3596 8278 3595 8279
3594 8280 3593 8280 3592 8282 3595 8285
3595 8286 3595 8287 3594 8290 3593 8290
3593 8292 3592 8291 3600 8309
FLASH FLOOD...OBSERVED
$$3 follow-up statements
828
WGUS74 KMRX 281324
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
924 AM EDT Thu May 28 2026
TNC029-059-281530-
/O.CON.KMRX.FF.W.0007.000000T0000Z-260528T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cocke TN-Greene TN-
924 AM EDT Thu May 28 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM EDT THIS
MORNING FOR NORTHEASTERN COCKE AND SOUTHWESTERN GREENE COUNTIES...
At 924 AM EDT, local law enforcement reported flash flooding across
the warned area. Between 2 and 4 inches of rain have fallen.
Flooding impacts will continue, but no additional rainfall is
expected.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Cedar Creek and Caney Branch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3603 8301 3607 8307 3609 8302 3599 8278
3598 8279 3597 8278 3596 8278 3595 8279
3594 8280 3593 8280 3592 8282 3595 8285
3595 8286 3595 8287 3594 8290 3593 8290
3593 8292 3592 8291 3600 8309
FLASH FLOOD...OBSERVED
$$
19265
WGUS54 KMRX 281444
FFWMRX
TNC029-059-281830-
/O.EXT.KMRX.FF.W.0007.000000T0000Z-260528T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
1044 AM EDT Thu May 28 2026
The National Weather Service in Morristown has extended the
* Flash Flood Warning for...
East Central Cocke County in east Tennessee...
South Central Greene County in east Tennessee...
* Until 230 PM EDT.
* At 1044 AM EDT, local law enforcement reported flooding across the
warned area. Between 2 and 4 inches of rain have fallen. Flooding
impacts will continue, but no additional rainfall is expected.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Caney Branch and Cedar Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3605 8297 3603 8290 3599 8289 3597 8290
3595 8297 3596 8300 3600 8309 3603 8301
3607 8306
FLASH FLOOD...OBSERVED
$$
19717
WGUS74 KMRX 281821
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
221 PM EDT Thu May 28 2026
TNC029-059-281831-
/O.EXP.KMRX.FF.W.0007.000000T0000Z-260528T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cocke TN-Greene TN-
221 PM EDT Thu May 28 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 230 PM EDT THIS AFTERNOON FOR
EAST CENTRAL COCKE AND SOUTH CENTRAL GREENE COUNTIES...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 3605 8297 3603 8290 3599 8289 3597 8290
3595 8297 3596 8300 3600 8309 3603 8301
3607 8306
$$
19What 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 28, 7:25 AM EDT, 2 minutes earlier. Its key messages:
- Updated at 718 AM EDT Thu May 28 2026
- Lower chance of showers today, mainly across southern sections.
- Rain chances persist through the weekend, but a dry weather pattern develops next week.
Area forecast discussion, May 28, 7:25 AM EDT, 2 minutes before
Area Forecast Discussion National Weather Service Morristown TN 725 AM EDT Thu May 28 2026 ...New AVIATION... .KEY MESSAGES... Updated at 718 AM EDT Thu May 28 2026 - Lower chance of showers today, mainly across southern sections. - Rain chances persist through the weekend, but a dry weather pattern develops next week. && .DISCUSSION... Issued at 129 AM EDT Thu May 28 2026 Showers are currently tracking southeast across the area, associated with a pre-frontal trough that will slowly push through the area overnight. Convergence along the trough in the moist air mass will keep at least some isolated showers through most of the night. This boundary will be near our southern border by sunrise, while the trailing cold front will be entering our northern sections. Surface dewpoints will remain in the 70s south of the front, so some scattered to isolated showers can be expected tomorrow, mainly near the front. A northerly flow through the low levels and some drier air aloft will limit coverage and intensity of convection. NBM PoPs will be cut back. Friday looks to have pretty limited rain chances, with the best chances in southern sections as the axis of deep moisture will be across GA/N AL/West TN, with midlevel ridging over our area. Forecast soundings look rather stable as well, with only weak CAPE present in the southern half. The axis of moisture returns northward on Saturday as PW values return to the 1.6-1.8 inch range, and a midlevel trough moves over the area. Sunday into next week could bring some drying out to the region as we sit on the southwest side of a deep trough/low meandering through the northern portion of the United States. This slow moving system means we'll be under generally drier northwesterly flow through much of the atmosphere. Surface high off the Atlantic coast could still draw up some low level moisture, but this pattern would typically indicate less chances for rain over the end of the weekend and into next week. In addition temperatures ever so slightly cool by a couple of degrees for the first half of next week under this system. && .AVIATION... (12Z TAFS) Issued at 718 AM EDT Thu May 28 2026 Conditions are mostly VFR and MVFR with some pockets of dense fog. Fog and low CIGs will lift quickly this morning with VFR conditions returning by mid morning. The best chance of a shower or storm will be near CHA, mainly in the afternoon. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 85 67 83 66 / 30 10 40 80 Knoxville McGhee Tyson Airport, TN 83 63 84 65 / 30 0 30 70 Oak Ridge, TN 83 62 83 64 / 20 0 30 70 Tri Cities Airport, TN 83 55 84 60 / 20 0 0 20 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && DISCUSSION...DGS AVIATION...McD
Hazardous weather outlook, May 28, 1:48 AM EDT, 5 hours 39 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 148 AM EDT Thu May 28 2026 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-290600- 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- 148 AM EDT Thu May 28 2026 /1248 AM CDT Thu May 28 2026/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time.
In the hours before
Local storm report, May 28, 6:14 AM EDT, 1 hour 13 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
614 AM EDT Thu May 28 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 AM Flash Flood 2 N Bybee 36.07N 83.18W
05/28/2026 Cocke TN 911 Call Center
Flooding on HWY 160.
&&
CMLocal storm report, May 28, 7:05 AM EDT, 22 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
705 AM EDT Thu May 28 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM Flash Flood 1 ENE Bybee 36.05N 83.17W
05/28/2026 Cocke TN 911 Call Center
Several roads reported flooded in North
Cocke County.
&&
CMThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 5:24 AM EDT | Areal Flood Advisory | MRX | Cocke | 111 min |
| May 28, 5:36 AM EDT | Flash Flood Warning | MRX | Cocke | 9 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.