Alert archive / Tennessee / Grundy County

Weather alerts in Grundy County, Tennessee, 2012

113 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grundy County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
113
Warnings
22
Watches
21
Advisories
22
Busiest month
March25 alerts
Busiest day
March 2, 201214 alerts

Over time

By month

Warning verification

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

0 of 6 tornado warnings covering Grundy County in 2012 had a tornado report inside them.

Grundy County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings60100%0
Severe thunderstorm warnings12558%2100%26 min
Flash flood warnings00

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Nashville, TN: tornado warnings65789%1974%17 min
NWS Nashville, TN: severe thunderstorm warnings38119349%53163%18 min
NWS Nashville, TN: flash flood warnings22864%1861%73 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 1, 1:55 PM CSTWind AdvisoryOHX28 hr
Jan 11, 11:00 AM CSTSpecial Weather StatementOHX2 hr
Jan 12, 3:21 AM CSTWinter Weather AdvisoryOHX30 hr
Jan 20, 10:35 PM CSTTornado WatchSPC8 hr
Jan 21, 4:20 AM CSTMesoscale DiscussionSPC55 min
Jan 21, 3:50 PM CSTWind AdvisoryOHX36 hr
Jan 21, 5:02 PM CSTDense Fog AdvisoryOHX19 hr
Jan 22, 10:59 PM CSTTornado WatchSPC7 hr
Jan 23, 1:25 AM CSTMesoscale DiscussionSPC2 hr
Feb 14, 5:23 PM CSTDense Fog AdvisoryOHX10 hr
Feb 21, 2:40 AM CSTWind AdvisoryOHX7 hr
Feb 22, 2:08 PM CSTMesoscale DiscussionSPC2 hr
Feb 22, 5:49 PM CSTMesoscale DiscussionSPC86 min
Feb 22, 6:08 PM CSTSevere Thunderstorm WarningOHX26 min
Feb 23, 3:48 AM CSTWind AdvisoryOHX16 hr
Feb 24, 1:00 AM CSTMesoscale DiscussionSPC2 hr
Feb 29, 11:31 AM CSTTornado WatchSPC8 hr
Feb 29, 5:14 PM CSTSevere Thunderstorm WarningOHX16 min
Mar 2, 4:00 AM CSTWind AdvisoryOHX17 hr
Mar 2, 9:07 AM CSTMesoscale DiscussionSPC53 min
Mar 2, 9:25 AM CSTTornado WatchSPC5 hr
Mar 2, 9:51 AM CSTTornado WarningOHX24 min
Mar 2, 10:12 AM CSTTornado WarningOHX33 min
Mar 2, 11:12 AM CSTFlash Flood WatchOHX10 hr
Mar 2, 11:46 AM CSTMesoscale DiscussionSPC29 min
Mar 2, 1:20 PM CSTTornado WatchSPC9 hr
Mar 2, 1:36 PM CSTSpecial Weather StatementOHX54 min
Mar 2, 2:27 PM CSTTornado WarningOHX33 min
Mar 2, 3:22 PM CSTTornado WarningOHX23 min
Mar 2, 3:25 PM CSTMesoscale DiscussionSPC65 min
Mar 2, 3:36 PM CSTTornado WarningOHX39 min
Mar 2, 3:42 PM CSTTornado WarningOHX32 min
Mar 2, 7:18 PM CSTMesoscale DiscussionSPC57 min
Mar 7, 12:59 PM CSTSpecial Weather StatementOHX5 hr
Mar 15, 2:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Mar 15, 6:23 PM CDTMesoscale DiscussionSPC97 min
Mar 16, 12:40 PM CDTMesoscale DiscussionSPC2 hr
Mar 23, 10:16 PM CDTMesoscale DiscussionSPC89 min
Mar 24, 4:52 PM CDTMesoscale DiscussionSPC53 min
Mar 31, 12:29 PM CDTMesoscale DiscussionSPC91 min
Mar 31, 12:47 PM CDTSevere Thunderstorm WatchSPC8 hr
Mar 31, 3:02 PM CDTMesoscale DiscussionSPC58 min
Mar 31, 5:00 PM CDTMesoscale DiscussionSPC30 min
Apr 5, 1:21 PM CDTSevere Thunderstorm WatchSPC8 hr
Apr 5, 3:06 PM CDTMesoscale DiscussionSPC54 min
Apr 6, 1:33 PM CDTFrost AdvisoryOHX18 hr
Apr 9, 9:12 PM CDTFreeze WatchOHX17 hr
Apr 10, 3:56 AM CDTFrost AdvisoryOHX27 hr
Apr 10, 2:11 PM CDTFreeze WatchOHX22 hr
Apr 11, 3:49 AM CDTFreeze WarningOHX28 hr
Apr 26, 5:22 AM CDTSevere Thunderstorm WatchSPC3 hr
Apr 26, 2:11 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 26, 5:40 PM CDTMesoscale DiscussionSPC95 min
May 1, 12:33 PM CDTMesoscale DiscussionSPC117 min
May 6, 5:45 PM CDTSevere Thunderstorm WarningOHX30 min
May 20, 4:30 PM CDTSpecial Weather StatementOHX60 min
May 22, 6:15 PM CDTAreal Flood AdvisoryOHX35 min
May 30, 4:09 AM CDTDense Fog AdvisoryOHX4 hr
Jun 11, 1:12 PM CDTMesoscale DiscussionSPC93 min
Jun 11, 7:44 PM CDTSpecial Weather StatementOHX61 min
Jul 1, 1:08 PM CDTMesoscale DiscussionSPC3 hr
Jul 2, 5:16 PM CDTMesoscale DiscussionSPC2 hr
Jul 2, 5:42 PM CDTSpecial Weather StatementOHX63 min
Jul 5, 12:11 PM CDTMesoscale DiscussionSPC94 min
Jul 5, 2:19 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 5, 6:20 PM CDTMesoscale DiscussionSPC115 min
Jul 5, 6:51 PM CDTSevere Thunderstorm WarningOHX54 min
Jul 15, 6:12 PM CDTSpecial Weather StatementOHX48 min
Jul 15, 6:29 PM CDTAreal Flood AdvisoryOHX2 hr
Jul 18, 2:02 PM CDTSpecial Weather StatementOHX58 min
Jul 19, 6:42 PM CDTMesoscale DiscussionSPC93 min
Jul 28, 12:57 PM CDTMesoscale DiscussionSPC3 hr
Jul 31, 4:25 AM CDTSevere Thunderstorm WarningOHX35 min
Jul 31, 4:59 AM CDTSevere Thunderstorm WarningOHX16 min
Aug 1, 1:52 PM CDTMesoscale DiscussionSPC53 min
Aug 1, 2:40 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 1, 6:08 PM CDTSpecial Weather StatementOHX52 min
Aug 1, 6:31 PM CDTSevere Thunderstorm WarningOHX44 min
Aug 1, 7:54 PM CDTMesoscale DiscussionSPC66 min
Aug 1, 8:13 PM CDTSpecial Weather StatementOHX62 min
Aug 1, 8:26 PM CDTSevere Thunderstorm WarningOHX34 min
Aug 1, 8:46 PM CDTSevere Thunderstorm WarningOHX44 min
Aug 10, 11:20 AM CDTMesoscale DiscussionSPC85 min
Aug 13, 12:21 PM CDTMesoscale DiscussionSPC24 min
Aug 13, 12:38 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 16, 9:26 PM CDTMesoscale DiscussionSPC3 hr
Aug 16, 11:24 PM CDTSevere Thunderstorm WarningOHX36 min
Aug 17, 12:05 AM CDTSevere Thunderstorm WarningOHX40 min
Sep 2, 2:49 PM CDTTornado WatchSPC7 hr
Sep 2, 6:35 PM CDTMesoscale DiscussionSPC85 min
Sep 17, 2:48 AM CDTFlood WatchOHX27 hr
Sep 17, 3:53 PM CDTMesoscale DiscussionSPC97 min
Sep 18, 2:51 AM CDTAreal Flood WarningOHX4 hr
Oct 1, 1:16 PM CDTTornado WatchSPC7 hr
Oct 1, 3:00 PM CDTMesoscale DiscussionSPC2 hr
Oct 1, 5:40 PM CDTMesoscale DiscussionSPC95 min
Oct 1, 7:06 PM CDTTornado WatchSPC3 hr
Oct 8, 2:56 PM CDTFrost AdvisoryOHX17 hr
Oct 10, 3:55 AM CDTFrost AdvisoryOHX28 hr
Oct 14, 7:13 AM CDTWind AdvisoryOHX15 hr
Oct 14, 7:50 PM CDTMesoscale DiscussionSPC2 hr
Oct 14, 10:33 PM CDTSpecial Weather StatementOHX27 min
Oct 29, 3:48 PM CDTWind AdvisoryOHX27 hr
Oct 30, 2:57 PM CDTFreeze WarningOHX12 hr
Oct 31, 3:09 AM CDTFreeze WatchOHX8 hr
Oct 31, 11:00 AM CDTFreeze WarningOHX21 hr
Nov 8, 5:27 AM CSTDense Fog AdvisoryOHX4 hr
Nov 13, 12:53 AM CSTFreezing Fog AdvisoryOHX8 hr
Dec 17, 1:24 PM CSTMesoscale DiscussionSPC2 hr
Dec 17, 5:24 PM CSTSevere Thunderstorm WarningOHX20 min
Dec 19, 10:01 AM CSTWind AdvisoryOHX54 hr
Dec 24, 6:25 PM CSTDense Fog AdvisoryOHX14 hr
Dec 29, 6:16 PM CSTWinter Weather AdvisoryOHX5 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 archive20112013

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.