Alert archive / Iowa / Marshall County

Weather alerts in Marshall County, Iowa, 2023

109 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Marshall County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts
109
Warnings
38
Watches
18
Advisories
28
Busiest month
April25 alerts
Busiest day
March 31, 202311 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 Marshall County in 2023 had a tornado report inside them.

Marshall County, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings252116%1883%24 min
Flash flood warnings00

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Des Moines, IA: tornado warnings371365%2673%15 min
NWS Des Moines, IA: severe thunderstorm warnings19512038%32888%22 min
NWS Des Moines, IA: flash flood warnings5340%475%103 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 8, 4:42 AM CSTDense Fog AdvisoryDMX7 hr
Jan 17, 3:07 AM CSTWinter Storm WatchDMX12 hr
Jan 17, 3:09 PM CSTWinter Weather AdvisoryDMX45 hr
Jan 18, 12:53 PM CSTMesoscale DiscussionSPC5 hr
Jan 24, 5:49 AM CSTDense Fog AdvisoryDMX5 hr
Jan 27, 3:08 AM CSTWinter Weather AdvisoryDMX45 hr
Jan 28, 2:06 PM CSTWind Chill AdvisoryDMX21 hr
Jan 30, 1:34 PM CSTWind Chill AdvisoryDMX20 hr
Feb 2, 3:14 AM CSTWind Chill AdvisoryDMX30 hr
Feb 7, 2:13 PM CSTWinter Storm WatchDMX24 hr
Feb 8, 2:23 PM CSTWinter Weather AdvisoryDMX22 hr
Feb 15, 3:27 AM CSTWinter Weather AdvisoryDMX39 hr
Feb 16, 8:02 AM CSTMesoscale DiscussionSPC6 hr
Feb 21, 2:47 AM CSTWinter Weather AdvisoryDMX57 hr
Feb 21, 2:17 PM CSTIce Storm WarningDMX37 hr
Mar 7, 3:38 AM CSTWinter Storm WatchDMX35 hr
Mar 8, 3:04 PM CSTWinter Storm WarningDMX30 hr
Mar 8, 3:04 PM CSTWinter Weather AdvisoryDMX33 hr
Mar 9, 8:42 AM CSTMesoscale DiscussionSPC4 hr
Mar 16, 3:12 AM CDTWind AdvisoryDMX25 hr
Mar 25, 2:41 PM CDTWinter Weather AdvisoryDMX22 hr
Mar 31, 3:30 AM CDTWind AdvisoryDMX28 hr
Mar 31, 11:24 AM CDTMesoscale DiscussionSPC96 min
Mar 31, 11:46 AM CDTTornado Watch PDSSPC8 hr
Mar 31, 2:41 PM CDTSevere Thunderstorm WarningDMX42 min
Mar 31, 2:46 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX59 min
Mar 31, 3:17 PM CDTMesoscale DiscussionSPC88 min
Mar 31, 4:24 PM CDTSevere Thunderstorm WarningDMX62 min
Mar 31, 4:28 PM CDTTornado WarningDMX34 min
Mar 31, 4:34 PM CDTTornado WarningDMX29 min
Mar 31, 5:18 PM CDTMesoscale DiscussionSPC117 min
Mar 31, 5:30 PM CDTMesoscale DiscussionSPC2 hr
Apr 4, 1:49 PM CDTMesoscale DiscussionSPC116 min
Apr 4, 2:48 PM CDTTornado WatchSPC7 hr
Apr 4, 6:18 PM CDTMesoscale DiscussionSPC87 min
Apr 4, 6:30 PM CDTSevere Thunderstorm WarningDMX45 min
Apr 4, 6:54 PM CDTSevere Thunderstorm WarningDMX51 min
Apr 4, 8:13 PM CDTSevere Thunderstorm WarningDMX47 min
Apr 4, 8:56 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX49 min
Apr 4, 9:10 PM CDTMesoscale DiscussionSPC65 min
Apr 4, 9:58 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 12, 2:57 AM CDTRed Flag WarningDMX17 hr
Apr 12, 2:20 PM CDTRed Flag WarningDMX30 hr
Apr 15, 2:47 PM CDTWind AdvisoryDMX44 hr
Apr 19, 10:10 PM CDTSevere Thunderstorm WarningDMX50 min
Apr 19, 10:29 PM CDTSevere Thunderstorm WarningDMX46 min
Apr 19, 10:57 PM CDTSevere Thunderstorm WarningDMX48 min
Apr 19, 10:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 19, 11:08 PM CDTSevere Thunderstorm WarningDMX37 min
Apr 19, 11:41 PM CDTSevere Thunderstorm WarningDMX58 min
Apr 21, 3:24 AM CDTFreeze WatchDMX24 hr
Apr 21, 3:24 AM CDTFreeze WarningDMX30 hr
Apr 22, 3:38 AM CDTFreeze WarningDMX29 hr
Apr 23, 4:08 AM CDTFreeze WatchDMX10 hr
Apr 23, 2:31 PM CDTFreeze WarningDMX18 hr
Apr 25, 2:17 PM CDTFreeze WarningDMX18 hr
Apr 30, 2:41 AM CDTWind AdvisoryDMX17 hr
May 1, 10:22 AM CDTWind AdvisoryDMX9 hr
May 6, 10:41 PM CDTDense Fog AdvisoryDMX12 hr
May 7, 2:10 PM CDTMesoscale DiscussionSPC2 hr
May 7, 2:56 PM CDTSevere Thunderstorm WarningDMX49 min
May 7, 3:30 PM CDTSevere Thunderstorm WarningDMX45 min
May 7, 3:40 PM CDTSevere Thunderstorm WarningDMX32 min
May 7, 4:10 PM CDTSevere Thunderstorm WatchSPC10 hr
May 7, 4:15 PM CDTSevere Thunderstorm WarningDMX45 min
May 7, 9:20 PM CDTSevere Thunderstorm WarningDMX40 min
May 13, 12:01 PM CDTMesoscale DiscussionSPC119 min
May 13, 12:54 PM CDTTornado WatchSPC7 hr
Jun 17, 2:24 PM CDTMesoscale DiscussionSPC2 hr
Jun 17, 9:35 PM CDTSpecial Weather StatementDMX40 min
Jun 24, 1:27 PM CDTMesoscale DiscussionSPC2 hr
Jun 24, 1:35 PM CDTTornado WatchSPC5 hr
Jun 24, 3:39 PM CDTMesoscale DiscussionSPC2 hr
Jul 12, 1:00 AM CDTSevere Thunderstorm WarningDMX45 min
Jul 12, 5:15 AM CDTSevere Thunderstorm WatchSPC6 hr
Jul 12, 7:25 AM CDTMesoscale DiscussionSPC95 min
Jul 12, 8:18 AM CDTSevere Thunderstorm WarningDMX42 min
Jul 13, 7:54 PM CDTSevere Thunderstorm WarningDMX51 min
Jul 13, 8:41 PM CDTSevere Thunderstorm WarningDMX49 min
Jul 25, 2:47 PM CDTHeat AdvisoryDMX3 days
Jul 27, 3:19 AM CDTExcessive Heat WarningDMX42 hr
Jul 28, 3:55 PM CDTMesoscale DiscussionSPC95 min
Jul 28, 4:57 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 28, 6:28 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX47 min
Jul 28, 7:18 PM CDTSevere Thunderstorm WarningDMX57 min
Jul 28, 7:50 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX40 min
Jul 28, 8:24 PM CDTSevere Thunderstorm WarningDMX66 min
Aug 3, 3:47 AM CDTDense Fog AdvisoryDMX5 hr
Aug 5, 10:17 PM CDTMesoscale DiscussionSPC58 min
Aug 17, 3:07 PM CDTExcessive Heat WatchDMX71 hr
Aug 18, 2:18 PM CDTExcessive Heat WarningDMX7 days
Aug 18, 2:18 PM CDTHeat AdvisoryDMX31 hr
Aug 21, 2:56 PM CDTExcessive Heat WatchDMX24 hr
Sep 16, 2:28 AM CDTDense Fog AdvisoryDMX7 hr
Sep 23, 1:09 PM CDTMesoscale DiscussionSPC96 min
Sep 23, 1:34 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 23, 3:39 PM CDTMesoscale DiscussionSPC96 min
Sep 23, 6:23 PM CDTMesoscale DiscussionSPC2 hr
Oct 8, 3:01 PM CDTFrost AdvisoryDMX18 hr
Oct 9, 2:23 PM CDTFrost AdvisoryDMX19 hr
Oct 11, 11:12 PM CDTSpecial Weather StatementDMX33 min
Oct 13, 12:12 PM CDTMesoscale DiscussionSPC93 min
Oct 13, 1:30 PM CDTTornado WatchSPC5 hr
Oct 13, 3:26 PM CDTMesoscale DiscussionSPC94 min
Oct 27, 3:05 AM CDTFreeze WarningDMX31 hr
Oct 30, 3:33 PM CDTWind AdvisoryDMX21 hr
Nov 25, 11:34 AM CSTWinter Weather AdvisoryDMX21 hr
Dec 17, 1:54 PM CSTWind AdvisoryDMX16 hr
Dec 22, 3:20 PM CSTDense Fog AdvisoryDMX20 hr

By product

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

ProductAlerts
Severe storms
Severe Thunderstorm Warning25
Tornado Warning2
Severe Thunderstorm Watch6
Tornado Watch5
Mesoscale Discussion23
Special Weather Statement2
Winter
Ice Storm Warning1
Winter Storm Warning1
Winter Storm Watch3
Winter Weather Advisory8
Heat
Excessive Heat Warning2
Excessive Heat Watch2
Heat Advisory2
Cold
Freeze Warning5
Freeze Watch2
Frost Advisory2
Wind Chill Advisory3
Wind and dust
Wind Advisory7
Fire
Red Flag Warning2
Fog and smoke
Dense Fog Advisory6

The busiest days

Days with the most alerts issued, by UTC date.

  1. March 31, 202311alerts
  2. May 7, 20237alerts
  3. April 20, 20236alerts
  4. April 4, 20235alerts
  5. April 5, 20234alerts
  6. July 12, 20234alerts
  7. September 23, 20234alerts
  8. June 24, 20233alerts
  9. July 28, 20233alerts
  10. July 29, 20233alerts

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20222024

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.