Alert archive / Tennessee

Weather alerts in Rhea County, Tennessee

2,806 weather alerts since 1986, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rhea County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Alerts
2,806
Warnings
779
Watches
446
Advisories
698
Busiest year
2011157 alerts
Average year
72over 39 years on file

Over time

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

From 2008 to 2025, 80% of tornado reports in Rhea County fell inside a tornado warning issued on average 28 minutes before, and 75% of the tornado warnings had no report inside them.

Tornado warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
20093233%0
201030100%10%
201113654%3100%34 min
20126183%1100%12 min
201410100%0
201610100%0
201820100%0
202010100%0
202310100%0
202550100%0
Share of tornado reports inside a tornado warning, by year.

Severe thunderstorm warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
2008252212%888%18 min
2009292321%989%12 min
2010211814%1963%25 min
2011312035%875%19 min
2012231630%1275%19 min
201311736%4100%9 min
201415147%6100%26 min
201510820%475%19 min
2016131115%333%30 min
2017121017%367%27 min
2018302420%1070%20 min
20196517%863%35 min
202016160%1486%25 min
2021770%425%8 min
202211109%5100%8 min
202328267%8100%23 min
202411109%425%13 min
202525244%560%19 min

Flash flood warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
200810100%0
201010100%10%
201120100%0
201210100%0
20133167%0
20143167%1100%51 min
201510100%10%
201710100%0
20189722%250%275 min
2019110%0
2020220%0
20213233%0
20225180%0
20233167%1100%12 min
20244325%0
2025110%0

Years from 2008, the first full year of storm-based warnings. The year still running is on its own page.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The latest warnings

The most recent on file, newest first.

IssuedProductOfficeLasted
Aug 22, 8:35 PM EDTSevere Thunderstorm WarningMRX40 min
Aug 20, 7:49 PM EDTSevere Thunderstorm WarningMRX56 min
Aug 17, 3:59 PM EDTSevere Thunderstorm WarningMRX61 min
Aug 12, 12:20 AM EDTFlash Flood WarningMRX3 hr
Aug 9, 3:47 PM EDTFlash Flood WarningMRX85 min
Jul 19, 7:42 PM EDTFlash Flood WarningMRX2 hr
Jul 19, 6:18 PM EDTFlash Flood WarningMRX117 min
Jul 7, 8:33 PM EDTFlash Flood WarningMRX2 hr
Jul 3, 5:07 PM EDTSevere Thunderstorm WarningMRX38 min
Jul 3, 4:30 PM EDTSevere Thunderstorm WarningMRX45 min
Mar 16, 2:41 AM EDTSevere Thunderstorm WarningMRX49 min
Mar 16, 2:40 AM EDTSevere Thunderstorm WarningMRX65 min

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.