Alert archive / Iowa / Henry County

Weather alerts in Henry County, Iowa, 2022

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

Henry County and its neighbors

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

Alerts
91
Warnings
20
Watches
10
Advisories
37
Busiest month
January11 alerts
Busiest day
March 6, 20224 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 2 tornado warnings covering Henry County in 2022 had a tornado report inside them.

Henry County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings7529%367%25 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 16, 8:26 AM CSTDense Fog AdvisoryDVN97 min
Jan 19, 2:13 AM CSTWind Chill AdvisoryDVN34 hr
Jan 25, 3:27 AM CSTWind Chill AdvisoryDVN30 hr
Feb 15, 3:06 PM CSTWinter Storm WatchDVN12 hr
Feb 16, 3:30 AM CSTWinter Weather AdvisoryDVN39 hr
Feb 18, 8:38 PM CSTSnow Squall WarningDVN52 min
Feb 18, 8:43 PM CSTSpecial Weather StatementDVN62 min
Feb 18, 9:37 PM CSTSpecial Weather StatementDVN53 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, 5:33 PM CSTMesoscale DiscussionSPC117 min
Mar 5, 6:10 PM CSTTornado WatchSPC4 hr
Mar 5, 7:40 PM CSTSevere Thunderstorm WarningDVN50 min
Mar 5, 7:51 PM CSTMesoscale DiscussionSPC114 min
Mar 6, 3:05 PM CSTWinter Weather AdvisoryDVN21 hr
Mar 9, 2:38 PM CSTWinter Weather AdvisoryDVN39 hr
Mar 25, 3:10 AM CDTWind AdvisoryDVN19 hr
Apr 13, 3:38 AM CDTSpecial Weather StatementDVN52 min
Apr 13, 4:07 AM CDTSpecial Weather StatementDVN38 min
Apr 13, 2:26 PM CDTWind AdvisoryDVN29 hr
Apr 23, 3:04 AM CDTWind AdvisoryDVN16 hr
Apr 25, 3:02 AM CDTFreeze WarningDVN29 hr
Apr 26, 2:39 PM CDTFrost AdvisoryDVN17 hr
May 11, 10:08 AM CDTHeat AdvisoryDVN11 hr
May 12, 2:48 AM CDTHeat AdvisoryDVN17 hr
May 25, 6:30 PM CDTTornado WarningDVN15 min
May 25, 6:42 PM CDTTornado WarningDVN17 min
May 26, 7:19 PM CDTFlash Flood WarningDVN3 hr
May 31, 6:22 PM CDTMesoscale DiscussionSPC83 min
Jun 6, 3:45 PM CDTMesoscale DiscussionSPC2 hr
Jun 12, 2:40 PM CDTHeat AdvisoryDVN3 days
Jun 14, 2:58 AM CDTExcessive Heat WarningDVN41 hr
Jun 15, 5:06 PM CDTMesoscale DiscussionSPC114 min
Jun 15, 6:21 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 15, 6:25 PM CDTSevere Thunderstorm WarningDVN37 min
Jun 15, 7:53 PM CDTMesoscale DiscussionSPC97 min
Jun 20, 2:16 PM CDTHeat AdvisoryDVN29 hr
Jun 21, 7:44 PM CDTSevere Thunderstorm WarningDVN31 min
Jun 25, 2:17 PM CDTMesoscale DiscussionSPC118 min
Jun 25, 5:02 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 3, 2:32 PM CDTHeat AdvisoryDVN47 hr
Jul 5, 1:09 PM CDTExcessive Heat WarningDVN7 hr
Jul 5, 9:53 PM CDTSevere Thunderstorm WarningDVN52 min
Jul 5, 10:31 PM CDTSevere Thunderstorm WarningDVN59 min
Jul 6, 8:02 PM CDTFlood WatchDVN33 hr
Jul 11, 6:22 AM CDTSevere Thunderstorm WarningDVN38 min
Jul 22, 3:26 AM CDTHeat AdvisoryDVN41 hr
Jul 23, 2:05 AM CDTMesoscale DiscussionSPC2 hr
Aug 2, 2:44 AM CDTHeat AdvisoryDVN17 hr
Aug 5, 2:46 AM CDTHeat AdvisoryDVN42 hr
Aug 6, 12:22 PM CDTExcessive Heat WarningDVN9 hr
Aug 19, 2:31 PM CDTMesoscale DiscussionSPC119 min
Aug 19, 3:04 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 29, 7:39 AM CDTMesoscale DiscussionSPC96 min
Aug 29, 9:11 AM CDTSevere Thunderstorm WarningDVN49 min
Aug 29, 9:42 AM CDTMesoscale DiscussionSPC2 hr
Sep 2, 6:11 PM CDTSpecial Weather StatementDVN34 min
Sep 2, 6:43 PM CDTSpecial Weather StatementDVN32 min
Sep 2, 7:23 PM CDTSpecial Weather StatementDVN22 min
Sep 6, 2:31 AM CDTDense Fog AdvisoryDVN6 hr
Sep 18, 3:56 PM CDTMesoscale DiscussionSPC2 hr
Sep 18, 6:11 PM CDTTornado WatchSPC6 hr
Sep 18, 8:41 PM CDTMesoscale DiscussionSPC3 hr
Sep 24, 3:02 AM CDTDense Fog AdvisoryDVN7 hr
Sep 27, 1:53 PM CDTFrost AdvisoryDVN18 hr
Oct 6, 2:32 PM CDTFreeze WatchDVN12 hr
Oct 7, 2:19 AM CDTFreeze WarningDVN31 hr
Oct 13, 2:52 AM CDTRed Flag WarningDVN16 hr
Oct 22, 10:31 AM CDTRed Flag WarningDVN8 hr
Nov 4, 2:05 PM CDTMesoscale DiscussionSPC115 min
Nov 4, 7:46 PM CDTSpecial Weather StatementDVN29 min
Nov 10, 11:47 AM CSTMesoscale DiscussionSPC88 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 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 24, 3:10 AM CSTWind Chill AdvisoryDVN7 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.