Alert archive / Iowa / Monona County

Weather alerts in Monona County, Iowa, 2017

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

Monona County and its neighbors

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

Alerts
90
Warnings
20
Watches
15
Advisories
25
Busiest month
June20 alerts
Busiest day
May 17, 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.

0 of 2 tornado warnings covering Monona County in 2017 had a tornado report inside them.

Monona County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings11464%0
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Omaha, NE: tornado warnings251060%2763%14 min
NWS Omaha, NE: severe thunderstorm warnings25814046%41287%17 min
NWS Omaha, NE: flash flood warnings8538%1392%69 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 2, 12:36 AM CSTWinter Weather AdvisoryOAX11 hr
Jan 10, 3:46 AM CSTWinter Weather AdvisoryOAX8 hr
Jan 12, 4:00 PM CSTWinter Storm WatchOAX47 hr
Jan 14, 2:37 PM CSTIce Storm WarningOAX52 hr
Jan 16, 3:18 PM CSTWinter Weather AdvisoryOAX8 hr
Jan 19, 3:39 PM CSTDense Fog AdvisoryOAX17 hr
Jan 20, 6:27 PM CSTDense Fog AdvisoryOAX17 hr
Jan 23, 3:30 PM CSTWinter Storm WarningOAX49 hr
Jan 23, 3:30 PM CSTWinter Weather AdvisoryOAX49 hr
Jan 30, 4:10 AM CSTWind AdvisoryOAX11 hr
Feb 7, 11:56 AM CSTWinter Weather AdvisoryOAX23 hr
Feb 21, 2:53 PM CSTWinter Storm WatchOAX37 hr
Feb 22, 3:23 PM CSTWinter Storm WarningOAX45 hr
Feb 23, 4:20 AM CSTWinter Weather AdvisoryOAX38 hr
Feb 23, 6:05 PM CSTMesoscale DiscussionSPC6 hr
Feb 23, 11:54 PM CSTMesoscale DiscussionSPC6 hr
Mar 5, 3:40 PM CSTRed Flag WarningOAX28 hr
Mar 5, 3:44 PM CSTWind AdvisoryOAX28 hr
Mar 6, 1:54 PM CSTTornado WatchSPC8 hr
Mar 6, 2:09 PM CSTSevere Thunderstorm WarningOAX36 min
Mar 6, 2:40 PM CSTSevere Thunderstorm WarningOAX35 min
Mar 6, 4:32 PM CSTFire Weather WatchOAX11 hr
Mar 6, 4:32 PM CSTRed Flag WarningOAX25 hr
Mar 7, 3:17 AM CSTWind AdvisoryOAX12 hr
Apr 3, 1:32 AM CDTDense Fog AdvisoryOAX9 hr
Apr 15, 4:01 PM CDTMesoscale DiscussionSPC119 min
Apr 15, 5:05 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 15, 6:22 PM CDTMesoscale DiscussionSPC83 min
Apr 19, 2:29 PM CDTMesoscale DiscussionSPC3 hr
Apr 19, 3:23 PM CDTTornado WatchSPC7 hr
Apr 19, 5:53 PM CDTSpecial Weather StatementOAX37 min
Apr 26, 3:54 AM CDTFrost AdvisoryOAX29 hr
Apr 26, 8:33 AM CDTFreeze WarningOAX24 hr
May 16, 3:58 PM CDTMesoscale DiscussionSPC2 hr
May 16, 4:57 PM CDTSevere Thunderstorm WatchSPC7 hr
May 16, 6:37 PM CDTSevere Thunderstorm WarningOAX38 min
May 16, 7:07 PM CDTSevere Thunderstorm WarningOAX41 min
May 16, 7:31 PM CDTMesoscale DiscussionSPC59 min
May 16, 9:43 PM CDTMesoscale DiscussionSPC62 min
May 17, 12:08 PM CDTTornado WatchSPC7 hr
May 17, 2:25 PM CDTMesoscale DiscussionSPC65 min
May 17, 3:14 PM CDTSpecial Weather StatementOAX31 min
May 17, 3:29 PM CDTSpecial Weather StatementOAX31 min
Jun 13, 3:46 PM CDTMesoscale DiscussionSPC2 hr
Jun 13, 5:25 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 13, 7:48 PM CDTMesoscale DiscussionSPC87 min
Jun 13, 8:58 PM CDTSevere Thunderstorm WarningOAX32 min
Jun 13, 9:33 PM CDTSpecial Weather StatementOAX42 min
Jun 13, 9:36 PM CDTMesoscale DiscussionSPC54 min
Jun 16, 3:30 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 16, 6:16 PM CDTMesoscale DiscussionSPC119 min
Jun 16, 6:18 PM CDTSevere Thunderstorm WarningOAX42 min
Jun 16, 7:07 PM CDTSevere Thunderstorm WarningOAX38 min
Jun 27, 11:33 PM CDTMesoscale DiscussionSPC57 min
Jun 29, 3:42 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 29, 5:33 PM CDTTornado WarningOAX27 min
Jun 29, 5:57 PM CDTTornado WarningOAX33 min
Jun 29, 6:08 PM CDTMesoscale DiscussionSPC67 min
Jun 29, 6:16 PM CDTSevere Thunderstorm WarningOAX29 min
Jun 29, 6:25 PM CDTSpecial Weather StatementOAX50 min
Jun 29, 6:45 PM CDTSevere Thunderstorm WarningOAX30 min
Jun 29, 7:13 PM CDTSevere Thunderstorm WarningOAX32 min
Jun 30, 6:34 PM CDTSevere Thunderstorm WarningOAX26 min
Jul 11, 1:54 AM CDTMesoscale DiscussionSPC3 hr
Jul 17, 3:41 PM CDTExcessive Heat WatchOAX24 hr
Jul 18, 3:57 PM CDTHeat AdvisoryOAX4 days
Jul 20, 3:57 PM CDTMesoscale DiscussionSPC2 hr
Jul 20, 5:17 PM CDTSpecial Weather StatementOAX28 min
Jul 21, 1:32 PM CDTMesoscale DiscussionSPC2 hr
Aug 15, 8:38 PM CDTAreal Flood AdvisoryOAX112 min
Aug 20, 11:14 PM CDTMesoscale DiscussionSPC91 min
Aug 21, 11:33 AM CDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 2:35 PM CDTMesoscale DiscussionSPC85 min
Aug 21, 4:22 PM CDTSpecial Weather StatementOAX53 min
Aug 25, 1:31 AM CDTSpecial Weather StatementOAX59 min
Aug 25, 2:39 AM CDTSpecial Weather StatementOAX81 min
Oct 2, 6:40 PM CDTMesoscale DiscussionSPC3 hr
Oct 4, 3:22 PM CDTFlood WatchOAX60 hr
Oct 10, 1:24 PM CDTFrost AdvisoryOAX21 hr
Oct 22, 3:08 PM CDTWind AdvisoryOAX28 hr
Oct 24, 3:17 AM CDTWind AdvisoryOAX13 hr
Oct 25, 3:22 PM CDTWind AdvisoryOAX45 hr
Dec 3, 3:16 PM CSTWind AdvisoryOAX33 hr
Dec 11, 2:45 AM CSTWind AdvisoryOAX15 hr
Dec 12, 3:05 PM CSTWind AdvisoryOAX25 hr
Dec 21, 4:03 AM CSTWinter Weather AdvisoryOAX19 hr
Dec 26, 2:05 PM CSTWind Chill AdvisoryOAX20 hr
Dec 29, 2:50 PM CSTWind Chill WatchOAX13 hr
Dec 29, 2:50 PM CSTWind Chill AdvisoryOAX21 hr
Dec 30, 3:55 AM CSTWind Chill WarningOAX56 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.