Alert archive / Iowa / Ida County

Weather alerts in Ida County, Iowa, 2018

89 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Ida County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
89
Warnings
11
Watches
17
Advisories
34
Busiest month
June20 alerts
Busiest day
September 20, 20184 alerts

Over time

By month

Warning verification

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

Ida County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6350%10%
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Sioux Falls, SD: tornado warnings12375%1040%9 min
NWS Sioux Falls, SD: severe thunderstorm warnings1657753%15781%19 min
NWS Sioux Falls, SD: flash flood warnings433128%6682%104 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, 12:01 PM CSTWind Chill AdvisoryFSD22 hr
Jan 9, 3:46 AM CSTWinter Storm WatchFSD35 hr
Jan 10, 3:07 AM CSTWinter Weather AdvisoryFSD38 hr
Jan 12, 3:27 PM CSTWind Chill AdvisoryFSD19 hr
Jan 14, 3:20 AM CSTWind Chill AdvisoryFSD56 hr
Jan 19, 4:20 AM CSTWinter Storm WatchFSD47 hr
Jan 21, 3:41 AM CSTBlizzard WarningFSD43 hr
Jan 22, 9:20 AM CSTMesoscale DiscussionSPC6 hr
Jan 24, 1:03 AM CSTDense Fog AdvisoryFSD13 hr
Jan 24, 2:32 PM CSTDense Fog AdvisoryFSD23 hr
Feb 4, 3:12 PM CSTWinter Weather AdvisoryFSD21 hr
Feb 5, 12:02 PM CSTWinter Weather AdvisoryFSD118 min
Feb 7, 3:41 PM CSTWinter Weather AdvisoryFSD35 hr
Feb 8, 9:07 PM CSTMesoscale DiscussionSPC6 hr
Feb 18, 2:53 AM CSTWind AdvisoryFSD11 hr
Feb 18, 3:48 AM CSTWinter Weather AdvisoryFSD54 hr
Feb 21, 2:59 PM CSTWinter Weather AdvisoryFSD33 hr
Feb 22, 3:56 PM CSTWinter Storm WatchFSD23 hr
Feb 23, 3:00 PM CSTWinter Weather AdvisoryFSD27 hr
Feb 23, 10:16 PM CSTDense Fog AdvisoryFSD11 hr
Mar 4, 2:25 PM CSTWinter Weather AdvisoryFSD49 hr
Mar 15, 3:48 AM CDTWinter Weather AdvisoryFSD45 hr
Mar 30, 3:05 PM CDTWind AdvisoryFSD22 hr
Apr 2, 2:20 PM CDTWinter Weather AdvisoryFSD31 hr
Apr 12, 3:45 PM CDTBlizzard WarningFSD60 hr
Apr 12, 3:45 PM CDTWinter Storm WatchFSD24 hr
Apr 14, 10:06 AM CDTMesoscale DiscussionSPC6 hr
Apr 15, 3:27 AM CDTWinter Weather AdvisoryFSD13 hr
Apr 17, 3:33 AM CDTWinter Weather AdvisoryFSD38 hr
Apr 29, 1:58 PM CDTRed Flag WarningFSD5 hr
Apr 30, 3:31 AM CDTWind AdvisoryFSD15 hr
May 1, 3:16 PM CDTMesoscale DiscussionSPC89 min
May 1, 4:00 PM CDTSevere Thunderstorm WarningFSD45 min
May 8, 3:56 PM CDTMesoscale DiscussionSPC2 hr
May 15, 1:41 AM CDTDense Fog AdvisoryFSD7 hr
May 27, 3:28 AM CDTHeat AdvisoryFSD16 hr
May 29, 1:22 PM CDTMesoscale DiscussionSPC83 min
May 29, 3:54 PM CDTMesoscale DiscussionSPC96 min
Jun 1, 10:05 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 6, 2:22 PM CDTMesoscale DiscussionSPC113 min
Jun 6, 8:03 PM CDTSevere Thunderstorm WarningFSD27 min
Jun 8, 12:51 PM CDTMesoscale DiscussionSPC114 min
Jun 9, 2:51 AM CDTMesoscale DiscussionSPC114 min
Jun 10, 1:23 AM CDTMesoscale DiscussionSPC3 hr
Jun 11, 3:42 PM CDTTornado WatchSPC6 hr
Jun 13, 11:56 PM CDTMesoscale DiscussionSPC3 hr
Jun 14, 2:50 PM CDTHeat AdvisoryFSD3 days
Jun 17, 3:52 PM CDTMesoscale DiscussionSPC53 min
Jun 18, 1:34 PM CDTMesoscale DiscussionSPC56 min
Jun 18, 3:05 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 18, 5:46 PM CDTMesoscale DiscussionSPC119 min
Jun 18, 7:22 PM CDTSevere Thunderstorm WarningFSD23 min
Jun 20, 3:16 AM CDTFlash Flood WatchFSD28 hr
Jun 24, 3:28 PM CDTMesoscale DiscussionSPC62 min
Jun 24, 9:52 PM CDTFlash Flood WatchFSD25 hr
Jun 28, 3:17 AM CDTHeat AdvisoryFSD41 hr
Jun 30, 3:09 AM CDTFlash Flood WatchFSD25 hr
Jun 30, 12:40 PM CDTMesoscale DiscussionSPC3 hr
Jul 4, 4:16 AM CDTHeat AdvisoryFSD16 hr
Jul 4, 10:27 AM CDTMesoscale DiscussionSPC2 hr
Jul 10, 2:39 PM CDTHeat AdvisoryFSD53 hr
Jul 15, 6:18 AM CDTDense Fog AdvisoryFSD3 hr
Aug 5, 1:00 AM CDTSevere Thunderstorm WatchSPC4 hr
Aug 5, 3:33 AM CDTSevere Thunderstorm WarningFSD57 min
Aug 5, 3:46 AM CDTMesoscale DiscussionSPC89 min
Aug 5, 9:32 PM CDTMesoscale DiscussionSPC2 hr
Aug 26, 9:53 AM CDTMesoscale DiscussionSPC2 hr
Aug 26, 10:19 AM CDTSevere Thunderstorm WarningFSD41 min
Aug 27, 11:49 AM CDTMesoscale DiscussionSPC116 min
Aug 27, 2:57 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 31, 1:10 AM CDTMesoscale DiscussionSPC3 hr
Sep 4, 4:01 AM CDTFlash Flood WatchFSD17 hr
Sep 4, 2:06 PM CDTMesoscale DiscussionSPC2 hr
Sep 19, 2:40 AM CDTMesoscale DiscussionSPC3 hr
Sep 20, 2:31 PM CDTMesoscale DiscussionSPC119 min
Sep 20, 3:11 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 20, 5:48 PM CDTMesoscale DiscussionSPC57 min
Sep 20, 5:50 PM CDTSevere Thunderstorm WarningFSD25 min
Oct 3, 10:18 AM CDTWind AdvisoryFSD11 hr
Oct 7, 3:37 PM CDTFlood WatchFSD54 hr
Oct 11, 3:35 AM CDTFreeze WarningFSD29 hr
Nov 28, 2:25 PM CSTWinter Storm WatchFSD48 hr
Nov 29, 2:45 PM CSTWinter Storm WarningFSD69 hr
Nov 29, 9:09 PM CSTDense Fog AdvisoryFSD15 hr
Nov 30, 2:46 PM CSTWinter Weather AdvisoryFSD43 hr
Dec 8, 2:00 AM CSTDense Fog AdvisoryFSD10 hr
Dec 14, 1:06 AM CSTDense Fog AdvisoryFSD7 hr
Dec 26, 3:25 AM CSTWinter Weather AdvisoryFSD57 hr
Dec 26, 12:05 PM CSTFlood WatchFSD31 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 archive20172019

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.