Alert archive / Tennessee / Washington County

Weather alerts in Washington County, Tennessee, 2017

84 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Washington County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
84
Warnings
18
Watches
7
Advisories
31
Busiest month
March17 alerts
Busiest day
March 1, 20177 alerts

Over time

By month

Warning verification

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

Washington County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings4325%2100%19 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Morristown, TN: tornado warnings20100%0
NWS Morristown, TN: severe thunderstorm warnings1108820%20978%24 min
NWS Morristown, TN: flash flood warnings8625%1765%48 min

An office's figures cover every county it serves, including across state lines.

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.

The alerts

Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 4, 3:11 PM ESTWinter Weather AdvisoryMRX31 hr
Jan 5, 3:24 PM ESTWinter Storm WatchMRX13 hr
Jan 5, 3:24 PM ESTWinter Storm WarningMRX43 hr
Jan 5, 3:24 PM ESTWinter Weather AdvisoryMRX43 hr
Jan 6, 8:56 PM ESTMesoscale DiscussionSPC6 hr
Jan 7, 3:34 AM ESTWinter Weather AdvisoryMRX6 hr
Jan 14, 3:00 AM ESTDense Fog AdvisoryMRX7 hr
Jan 16, 4:06 AM ESTDense Fog AdvisoryMRX6 hr
Feb 8, 6:49 PM ESTSpecial Weather StatementMRX26 min
Feb 8, 9:33 PM ESTSpecial Weather StatementMRX42 min
Feb 23, 1:09 AM ESTDense Fog AdvisoryMRX9 hr
Feb 28, 3:25 AM ESTWind AdvisoryMRX44 hr
Mar 1, 7:47 AM ESTSevere Thunderstorm WatchSPC5 hr
Mar 1, 12:14 PM ESTSpecial Weather StatementMRX46 min
Mar 1, 12:28 PM ESTSpecial Weather StatementMRX62 min
Mar 1, 12:58 PM ESTSpecial Weather StatementMRX62 min
Mar 1, 1:06 PM ESTSevere Thunderstorm WarningMRX54 min
Mar 1, 2:29 PM ESTSpecial Weather StatementMRX46 min
Mar 1, 4:03 PM ESTAreal Flood AdvisoryMRX117 min
Mar 10, 3:55 AM ESTAreal Flood AdvisoryMRX3 hr
Mar 10, 4:03 AM ESTFreeze WarningMRX29 hr
Mar 10, 3:14 PM ESTFreeze WatchMRX232 days
Mar 11, 3:39 AM ESTFreeze WarningMRX27 hr
Mar 12, 3:37 AM EDTFreeze WarningMRX28 hr
Mar 13, 3:22 PM EDTFreeze WarningMRX46 hr
Mar 15, 3:44 AM EDTFreeze WarningMRX31 hr
Mar 15, 3:27 PM EDTFreeze WatchMRX23 hr
Mar 16, 2:47 PM EDTFreeze WarningMRX19 hr
Mar 22, 2:43 PM EDTFreeze WarningMRX19 hr
Apr 5, 8:10 PM EDTWind AdvisoryMRX31 hr
Apr 6, 3:36 PM EDTFreeze WatchMRX24 hr
Apr 7, 3:06 PM EDTFreeze WarningMRX18 hr
Apr 21, 2:13 PM EDTMesoscale DiscussionSPC2 hr
Apr 21, 3:01 PM EDTSpecial Weather StatementMRX59 min
Apr 21, 4:19 PM EDTMesoscale DiscussionSPC56 min
Apr 22, 4:11 AM EDTFlash Flood WatchMRX47 hr
Apr 22, 7:24 PM EDTAreal Flood AdvisoryMRX3 hr
Apr 22, 10:39 PM EDTAreal Flood AdvisoryMRX3 hr
Apr 23, 9:13 AM EDTAreal Flood AdvisoryMRX6 hr
Apr 23, 12:47 PM EDTAreal Flood WarningMRX6 hr
Apr 23, 6:31 PM EDTAreal Flood WarningMRX15 hr
Apr 24, 9:22 AM EDTAreal Flood WarningMRX6 hr
Apr 29, 3:58 PM EDTSpecial Weather StatementMRX47 min
Apr 29, 4:08 PM EDTSevere Thunderstorm WarningMRX52 min
Apr 30, 2:47 PM EDTWind AdvisoryMRX29 hr
May 2, 3:48 AM EDTWind AdvisoryMRX12 hr
May 3, 3:47 AM EDTWind AdvisoryMRX42 hr
May 3, 11:49 AM EDTHigh Wind WarningMRX34 hr
May 4, 11:54 PM EDTSpecial Weather StatementMRX51 min
May 5, 12:07 AM EDTSpecial Weather StatementMRX38 min
May 11, 4:47 PM EDTMesoscale DiscussionSPC2 hr
May 12, 4:52 PM EDTAreal Flood AdvisoryMRX3 hr
May 12, 5:05 PM EDTSpecial Weather StatementMRX40 min
May 12, 5:20 PM EDTAreal Flood AdvisoryMRX3 hr
May 24, 1:01 PM EDTSevere Thunderstorm WarningMRX59 min
May 27, 6:11 PM EDTMesoscale DiscussionSPC64 min
May 27, 6:55 PM EDTSevere Thunderstorm WatchSPC9 hr
May 27, 10:46 PM EDTMesoscale DiscussionSPC89 min
May 27, 11:54 PM EDTSevere Thunderstorm WarningMRX31 min
Jun 14, 1:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 23, 8:23 PM EDTSpecial Weather StatementMRX52 min
Jun 23, 9:20 PM EDTSpecial Weather StatementMRX55 min
Jul 1, 1:18 PM EDTMesoscale DiscussionSPC117 min
Jul 3, 7:18 PM EDTAreal Flood AdvisoryMRX3 hr
Jul 5, 4:41 PM EDTSpecial Weather StatementMRX49 min
Jul 6, 8:14 PM EDTSpecial Weather StatementMRX46 min
Jul 6, 8:49 PM EDTSpecial Weather StatementMRX41 min
Jul 7, 8:05 AM EDTAreal Flood AdvisoryMRX3 hr
Jul 9, 5:27 AM EDTDense Fog AdvisoryMRX5 hr
Jul 18, 2:31 PM EDTMesoscale DiscussionSPC59 min
Sep 1, 2:24 PM EDTMesoscale DiscussionSPC2 hr
Sep 10, 6:11 AM EDTWind AdvisoryMRX52 hr
Oct 7, 3:34 PM EDTWind AdvisoryMRX36 hr
Oct 24, 3:03 PM EDTFrost AdvisoryMRX18 hr
Oct 25, 3:48 AM EDTFrost AdvisoryMRX29 hr
Oct 29, 3:58 AM EDTFreeze WarningMRX30 hr
Nov 17, 2:49 PM ESTWind AdvisoryMRX37 hr
Nov 18, 9:37 PM ESTSpecial Weather StatementMRX53 min
Dec 3, 5:54 AM ESTDense Fog AdvisoryMRX3 hr
Dec 7, 5:11 PM ESTWinter Weather AdvisoryMRX41 hr
Dec 8, 12:06 PM ESTMesoscale DiscussionSPC4 hr
Dec 18, 10:13 PM ESTDense Fog AdvisoryMRX12 hr
Dec 22, 3:17 PM ESTWind AdvisoryMRX24 hr
Dec 31, 6:32 PM ESTWinter Weather AdvisoryMRX6 hr

By product

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

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20162018

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.