Alert archive / Iowa / Linn County

Weather alerts in Linn County, Iowa, 2022

125 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Linn County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts
125
Warnings
32
Watches
12
Advisories
42
Busiest month
July19 alerts
Busiest day
March 6, 20228 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 1 tornado warnings covering Linn County in 2022 had a tornado report inside them.

Linn County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings191237%2291%16 min
Flash flood warnings110%0

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Quad Cities, IA: tornado warnings301163%1974%16 min
NWS Quad Cities, IA: severe thunderstorm warnings1759148%23578%19 min
NWS Quad Cities, IA: flash flood warnings261350%2677%99 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, 3:12 AM CSTWind Chill AdvisoryDVN33 hr
Jan 1, 2:27 PM CSTMesoscale DiscussionSPC4 hr
Jan 4, 3:08 AM CSTWinter Weather AdvisoryDVN39 hr
Jan 5, 3:08 AM CSTWind Chill AdvisoryDVN36 hr
Jan 6, 2:02 AM CSTWind Chill AdvisoryDVN31 hr
Jan 7, 2:05 PM CSTWinter Weather AdvisoryDVN34 hr
Jan 12, 2:33 PM CSTWinter Storm WatchDVN24 hr
Jan 13, 2:47 PM CSTWinter Storm WarningDVN44 hr
Jan 13, 2:47 PM CSTWinter Weather AdvisoryDVN44 hr
Jan 19, 2:13 AM CSTWind Chill AdvisoryDVN34 hr
Jan 20, 2:12 PM CSTWind Chill AdvisoryDVN20 hr
Jan 22, 3:05 AM CSTWinter Weather AdvisoryDVN27 hr
Jan 24, 3:07 AM CSTWind Chill AdvisoryDVN57 hr
Jan 25, 1:31 PM CSTWind Chill WarningDVN22 hr
Feb 16, 3:30 AM CSTWinter Weather AdvisoryDVN39 hr
Feb 18, 3:24 AM CSTWind AdvisoryDVN21 hr
Feb 18, 6:55 PM CSTSpecial Weather StatementDVN65 min
Feb 18, 7:40 PM CSTSpecial Weather StatementDVN65 min
Feb 21, 2:48 AM CSTWinter Weather AdvisoryDVN39 hr
Feb 23, 2:55 PM CSTWinter Weather AdvisoryDVN36 hr
Mar 5, 3:27 AM CSTWind AdvisoryDVN27 hr
Mar 5, 6:31 AM CSTSpecial Weather StatementDVN59 min
Mar 5, 5:33 PM CSTMesoscale DiscussionSPC117 min
Mar 5, 6:10 PM CSTTornado WatchSPC4 hr
Mar 5, 6:55 PM CSTSevere Thunderstorm WarningDVN35 min
Mar 5, 7:20 PM CSTTornado WarningDVN40 min
Mar 5, 7:26 PM CSTSevere Thunderstorm WarningDVN34 min
Mar 5, 7:34 PM CSTSevere Thunderstorm WarningDVN26 min
Mar 5, 7:51 PM CSTMesoscale DiscussionSPC114 min
Mar 5, 8:06 PM CSTSevere Thunderstorm WarningDVN39 min
Mar 6, 3:05 PM CSTWinter Weather AdvisoryDVN21 hr
Mar 25, 3:10 AM CDTWind AdvisoryDVN19 hr
Apr 1, 2:40 PM CDTWinter Weather AdvisoryDVN22 hr
Apr 10, 1:50 PM CDTWind AdvisoryDVN4 hr
Apr 12, 2:05 PM CDTWind AdvisoryDVN115 min
Apr 13, 1:12 AM CDTSpecial Weather StatementDVN48 min
Apr 13, 2:26 PM CDTWind AdvisoryDVN29 hr
Apr 14, 10:35 AM CDTHigh Wind WarningDVN8 hr
Apr 22, 3:07 AM CDTFlood WatchDVN12 hr
Apr 22, 10:48 AM CDTSpecial Weather StatementDVN57 min
Apr 22, 11:49 AM CDTSpecial Weather StatementDVN41 min
Apr 23, 3:04 AM CDTWind AdvisoryDVN16 hr
Apr 25, 3:02 AM CDTFreeze WarningDVN29 hr
Apr 26, 2:39 PM CDTFreeze WarningDVN17 hr
Apr 30, 2:43 PM CDTMesoscale DiscussionSPC92 min
May 9, 6:32 PM CDTMesoscale DiscussionSPC88 min
May 9, 9:05 PM CDTMesoscale DiscussionSPC85 min
May 12, 2:48 AM CDTHeat AdvisoryDVN17 hr
May 25, 6:46 PM CDTMesoscale DiscussionSPC119 min
May 31, 1:23 AM CDTSpecial Weather StatementDVN67 min
Jun 12, 2:40 PM CDTHeat AdvisoryDVN3 days
Jun 13, 8:23 AM CDTSpecial Weather StatementDVN52 min
Jun 13, 9:06 AM CDTMesoscale DiscussionSPC114 min
Jun 14, 2:58 AM CDTExcessive Heat WarningDVN41 hr
Jun 15, 3:42 AM CDTMesoscale DiscussionSPC93 min
Jun 15, 1:22 PM CDTMesoscale DiscussionSPC113 min
Jun 15, 2:28 PM CDTTornado WatchSPC10 hr
Jun 15, 3:51 PM CDTSevere Thunderstorm WarningDVN54 min
Jun 20, 2:16 PM CDTHeat AdvisoryDVN29 hr
Jun 21, 5:26 PM CDTMesoscale DiscussionSPC94 min
Jun 25, 2:30 AM CDTSpecial Weather StatementDVN60 min
Jun 25, 4:43 AM CDTSpecial Weather StatementDVN62 min
Jun 25, 5:44 AM CDTSpecial Weather StatementDVN76 min
Jun 25, 5:48 AM CDTFlash Flood WarningDVN6 hr
Jul 4, 3:30 AM CDTHeat AdvisoryDVN34 hr
Jul 5, 1:09 PM CDTExcessive Heat WarningDVN7 hr
Jul 5, 4:34 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 5, 8:41 PM CDTMesoscale DiscussionSPC94 min
Jul 5, 9:00 PM CDTSevere Thunderstorm WarningDVN60 min
Jul 7, 5:38 PM CDTSpecial Weather StatementDVN112 min
Jul 11, 5:25 AM CDTMesoscale DiscussionSPC65 min
Jul 11, 5:40 AM CDTSevere Thunderstorm WatchSPC2 hr
Jul 11, 5:43 AM CDTSevere Thunderstorm WarningDVN62 min
Jul 11, 6:40 AM CDTSevere Thunderstorm WarningDVN50 min
Jul 22, 3:26 AM CDTHeat AdvisoryDVN41 hr
Jul 22, 10:22 PM CDTMesoscale DiscussionSPC113 min
Jul 23, 1:52 AM CDTSpecial Weather StatementDVN38 min
Jul 23, 2:00 AM CDTSevere Thunderstorm WarningDVN32 min
Jul 23, 2:05 AM CDTMesoscale DiscussionSPC2 hr
Jul 23, 8:55 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 23, 11:32 PM CDTSevere Thunderstorm WarningDVN43 min
Jul 24, 12:06 AM CDTSevere Thunderstorm WarningDVN24 min
Jul 24, 12:25 AM CDTSevere Thunderstorm WarningDVN65 min
Aug 1, 12:00 AM CDTSevere Thunderstorm WarningDVN30 min
Aug 1, 12:36 AM CDTSevere Thunderstorm WarningDVN24 min
Aug 2, 2:44 AM CDTHeat AdvisoryDVN17 hr
Aug 3, 9:45 AM CDTSpecial Weather StatementDVN30 min
Aug 3, 10:19 AM CDTSevere Thunderstorm WarningDVN26 min
Aug 3, 10:46 AM CDTSpecial Weather StatementDVN44 min
Aug 3, 7:01 PM CDTSpecial Weather StatementDVN29 min
Aug 5, 2:46 AM CDTHeat AdvisoryDVN42 hr
Aug 7, 2:20 AM CDTFlood WatchDVN29 hr
Aug 7, 3:15 AM CDTSpecial Weather StatementDVN45 min
Aug 19, 3:04 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 19, 4:57 PM CDTSevere Thunderstorm WarningDVN48 min
Aug 20, 4:33 PM CDTSpecial Weather StatementDVN117 min
Aug 24, 5:04 PM CDTMesoscale DiscussionSPC86 min
Aug 24, 11:43 PM CDTSpecial Weather StatementDVN47 min
Aug 29, 7:39 AM CDTMesoscale DiscussionSPC96 min
Sep 6, 2:31 AM CDTDense Fog AdvisoryDVN6 hr
Sep 18, 6:11 PM CDTTornado WatchSPC6 hr
Sep 18, 8:08 PM CDTSevere Thunderstorm WarningDVN36 min
Sep 27, 1:53 PM CDTFrost AdvisoryDVN18 hr
Sep 28, 3:00 PM CDTFrost AdvisoryDVN16 hr
Oct 6, 2:32 PM CDTFreeze WatchDVN12 hr
Oct 7, 2:19 AM CDTFreeze WarningDVN31 hr
Oct 12, 3:18 AM CDTSevere Thunderstorm WarningDVN27 min
Oct 12, 12:31 PM CDTWind AdvisoryDVN6 hr
Oct 22, 10:31 AM CDTRed Flag WarningDVN8 hr
Nov 4, 9:50 AM CDTSpecial Weather StatementDVN40 min
Nov 4, 12:11 PM CDTSevere Thunderstorm WarningDVN34 min
Nov 10, 11:47 AM CSTMesoscale DiscussionSPC88 min
Nov 10, 2:13 PM CSTSpecial Weather StatementDVN47 min
Nov 14, 2:24 PM CSTWinter Weather AdvisoryDVN30 hr
Dec 2, 2:52 AM CSTWind AdvisoryDVN26 hr
Dec 7, 3:36 AM CSTDense Fog AdvisoryDVN8 hr
Dec 7, 6:00 PM CSTWinter Weather AdvisoryDVN42 hr
Dec 9, 9:31 PM CSTDense Fog AdvisoryDVN14 hr
Dec 12, 2:25 PM CSTWind AdvisoryDVN31 hr
Dec 19, 2:42 PM CSTWinter Storm WatchDVN37 hr
Dec 20, 2:34 PM CSTWinter Storm WarningDVN4 days
Dec 21, 11:41 AM CSTBlizzard WarningDVN66 hr
Dec 24, 3:10 AM CSTWinter Weather AdvisoryDVN9 hr
Dec 24, 2:01 PM CSTWind Chill AdvisoryDVN20 hr
Dec 25, 12:16 PM CSTWinter Weather AdvisoryDVN24 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 archive20212023

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.