Alert archive / Tennessee / Flash Flood Warnings in 2024
Flash Flood Warning 14, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Jul 21, 2024, 7:50 PM EDT for Hamilton 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
- Jul 21, 2024, 7:50 PM EDT (23:50 UTC)
- Expired
- Jul 22, 2024, 2:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Hamilton County, TN
The radar
The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 23:53 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 12:00Z, 11.8 hours before the alert went out and 167 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
- 786 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 624 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
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 Jul 21, 7:31 PM EDT, 19 minutes earlier.
Area forecast discussion, Jul 21, 7:31 PM EDT, 19 minutes before
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</html>Hazardous weather outlook, Jul 21, 3:00 AM EDT, 16 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 300 AM EDT Sun Jul 21 2024 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-220700- 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- 300 AM EDT Sun Jul 21 2024 /200 AM CDT Sun Jul 21 2024/ 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...Monday through Saturday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time.
In the hours before
Special weather statement, Jul 21, 6:21 PM EDT, 1 hour 29 minutes before
Special Weather Statement
National Weather Service Morristown TN
621 PM EDT Sun Jul 21 2024
TNZ083>085-212300-
Rhea TN-Meigs TN-McMinn TN-
621 PM EDT Sun Jul 21 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN RHEA...MEIGS AND
MCMINN COUNTIES THROUGH 700 PM EDT...
At 620 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Decatur, moving northeast at 20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Athens, Decatur, Etowah, Englewood, Niota, Riceville, Clear Water,
Hillsview, Murray Store, and Big Spring.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3530 8494 3546 8501 3565 8461 3565 8459
3563 8458 3563 8457 3538 8443 3532 8480
3533 8481 3533 8482 3535 8485 3536 8488
3533 8489 3529 8492
TIME...MOT...LOC 2220Z 246DEG 15KT 3542 8484
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
JLBSpecial weather statement, Jul 21, 6:32 PM EDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Morristown TN
632 PM EDT Sun Jul 21 2024
TNZ036-067-069-212300-
Anderson TN-Roane TN-Knox TN-
632 PM EDT Sun Jul 21 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN ANDERSON...WEST
CENTRAL KNOX AND NORTHEASTERN ROANE COUNTIES THROUGH 700 PM EDT...
At 632 PM EDT, Doppler radar was tracking a strong thunderstorm over
Oak Ridge, moving east at 5 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Knoxville, Oak Ridge, Clinton, Farragut, Oliver Springs, Karns, and
Coalfield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3586 8435 3602 8440 3605 8434 3606 8435
3616 8414 3591 8402 3588 8424 3590 8428
3588 8428 3589 8431 3589 8433 3586 8434
TIME...MOT...LOC 2232Z 248DEG 6KT 3598 8428
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
JLBSpecial weather statement, Jul 21, 6:39 PM EDT, 1 hour 11 minutes before
Special Weather Statement
National Weather Service Morristown TN
639 PM EDT Sun Jul 21 2024
TNZ081-083-084-099-212315-
Sequatchie TN-Rhea TN-Hamilton TN-Meigs TN-
639 PM EDT Sun Jul 21 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN RHEA...SOUTHWESTERN
MEIGS...SOUTHEASTERN SEQUATCHIE AND CENTRAL HAMILTON COUNTIES THROUGH
715 PM EDT/615 PM CDT/...
At 639 PM EDT/539 PM CDT/, Doppler radar was tracking a strong
thunderstorm near Soddy-Daisy, or 12 miles southwest of Dayton,
moving east at 10 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Chattanooga, Dayton, Soddy-Daisy, Walden, Lakesite, Fairmount, Red
Bank, Graysville, Flat Top Mountain, and North Chickamauga Creek
Gorge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3530 8540 3538 8526 3536 8523 3541 8519
3552 8498 3532 8489 3529 8493 3530 8494
3528 8494 3526 8497 3525 8497 3514 8529
TIME...MOT...LOC 2239Z 248DEG 10KT 3533 8513
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
JLBSpecial weather statement, Jul 21, 7:12 PM EDT, 38 minutes before
Special Weather Statement
National Weather Service Morristown TN
712 PM EDT Sun Jul 21 2024
TNZ068-084>086-220000-
Northwest Monroe TN-Loudon TN-Meigs TN-McMinn TN-
712 PM EDT Sun Jul 21 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN LOUDON...EAST
CENTRAL MEIGS...NORTHEASTERN MCMINN AND NORTHWESTERN MONROE COUNTIES
THROUGH 800 PM EDT...
At 712 PM EDT, Doppler radar was tracking a strong thunderstorm near
Athens, moving northeast at 5 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Athens, Sweetwater, Madisonville, Decatur, Niota, Clear Water, and
Murray Store.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3554 8478 3565 8462 3565 8459 3566 8457
3567 8454 3568 8452 3569 8453 3570 8452
3571 8452 3571 8451 3548 8436 3542 8469
TIME...MOT...LOC 2312Z 242DEG 5KT 3553 8462
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
JLBLocal storm report, Jul 21, 7:41 PM EDT, 9 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:04 PM EDT | Special Weather Statement | MRX | Sevier | 41 min |
| Jul 21, 4:27 PM EDT | Special Weather Statement | MRX | Campbell | 33 min |
| Jul 21, 5:15 PM EDT | Special Weather Statement | MRX | Morgan | 30 min |
| Jul 21, 5:43 PM EDT | Areal Flood Advisory | MRX | Morgan | 3 hr |
| Jul 21, 6:21 PM EDT | Special Weather Statement | MRX | McMinn, Meigs | 39 min |
| Jul 21, 6:32 PM EDT | Special Weather Statement | MRX | Anderson | 28 min |
| Jul 21, 6:39 PM EDT | Special Weather Statement | MRX | Hamilton | 36 min |
| Jul 21, 6:53 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Meigs, Rhea | 52 min |
| Jul 21, 7:09 PM EDT | Areal Flood Advisory | MRX | Hamilton, Meigs, Rhea | 85 min |
| Jul 21, 7:12 PM EDT | Special Weather Statement | MRX | McMinn | 48 min |
| Jul 21, 7:20 PM EDT | Flash Flood Warning | MRX | Hamilton, Meigs | 5 hr |
| Jul 21, 7:43 PM EDT | Special Weather Statement | MRX | Hamilton, Marion | 47 min |
| Jul 21, 7:52 PM EDT | Areal Flood Advisory | MRX | McMinn, Meigs | 2 hr |
Nearby
Flash Flood Warnings in Tennessee, 2024Every flash flood warning in 2024
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.